The initial synchronization and the frame synchronization in a communication system with spread spectrum

 

(57) Abstract:

The invention relates to a system for spread spectrum communications, in particular to a device and method for initial synchronization and synchronization frames using the extender code for the mobile station in the communication system mdcr. For this purpose, the base station multiplies the expanding sequence for channel pilot signal on a combination of clock, which retains the same value for the sequence with a short period and for the same period of the same sequence, but have a different value on the boundary of one short period of the sequence. Mobile station initially rasschityvaet extend the sequence with a short period and the correlation value for initial synchronization and compresses the duration of N-microcode around the edge of one short period of expanding sequence for determining multiply combinations in order to provide synchronization of the frame data. The technical result achieved by the invention consists in the implementation of fast initial synchronization and synchronization of frames received signal with the COI is 4 C. and 15 C.p. f-crystals, 9 Il.

The invention generally relates to a system for spread spectrum communications and in particular to a device and method for initial synchronization and synchronization frames using the extend code to the mobile station.

Art

In Fig. 1 shows a straight line corresponding to the standard IS-95, a base station for transmitting signals of the channel to the mobile station in the mobile communication system, multiple access, code-division multiplexing (mdcr). As shown, the mobile communication system mdcr direct communication line includes a pilot channel signal, a sync channel, and paging channel. Direct line also includes, although not shown, the channel schedule for the transmission of voice and data.

As shown in Fig.1, the generator 110 channel pilot signal generates a pilot signal, comprising the whole of "1" for channel pilot signal and the multiplier 114 multiplies the pilot signal by an orthogonal code for Wo orthogonal expansion of the pilot signal. Here is a special code Walsh as the orthogonal code Wo. The multiplier 115 multiplies the signal of the pilot channel signal from the multiplier 114, PSH (pseudotumour) sequence Itachi, it can be used as the encoder 121 convolutional encoder with bit rate R= 1/2 and constraint length K=9. The repeater 122 repeats the output synchronization symbols from the output of the encoder 121 N times (N=2). Interleaver 123 punctuates output characters repeater 122 in order to prevent packet error. As the interleaver 123 is typically used block interleaver. The multiplier 124 multiplies the signal channel synchronization on the special orthogonal code assigned to the channel synchronization for orthogonal expansion of the channel signal synchronization. Channel synchronization provides information about the position, information about the standard time and information about the long code of the base station, and also provides information for system synchronization between the base station and mobile station. As described above, the generator 120 channel synchronization encodes the input signal of the sync channel and multiplies the encoded channel signal synchronization on special Walsh code Wsehrassigned to the sync channel from the available Walsh codes for orthogonal expansion of the channel signal synchronization. The multiplier 125 multiplies the signal of the sync channel at the output of multiplier 124 on PSH follower is La, the encoder 131 encodes the input signal to the paging channel. As the encoder 131 can be used convolutional encoder with R=1/2 and K=9. Repeater 132 repeats the symbols at the output of the encoder 131, N times (N=1 or 2). Interleaver 133 punctuates output characters repeater 132 in order to prevent packet error. Usually as the interleaver 133 uses a block interleaver. Generator 141 long code generates a long code which is a code identifying the user. Thinner 142 thins long code, in order to coordinate the speed of the long code with the speed of symbols at the output of the interleaver 133. The logical element 143 XOR performs an exclusive OR function on coded paging signal from the output of the interleaver 133 and over the long code from the output of the thinner 142 for scrambling paging signal. The multiplier 134 multiplies the scrambled paging signal at the output of logic element 143 XOR on orthogonal code Wpassigned paging channel, to maintain orthogonality with the signal of another channel. The multiplier 135 multiplies the signal of the paging channel at the output of multiplier 134 on the PN sequence for the extension silestra channels are multiplied by the PN sequence to expand and transform with increasing frequency in RF RF signals for transmission. In accordance with the standard IS-95 expansion is carried out using two different PN sequences for the I and Q branches. Used here PN sequences have a period of 32 768.

In the structure of the straight line in Fig.1 channel pilot signal does not transfer the data, and extends the signal of all "1" through a PN sequence with a period of 32 768 for transmission. In the system, with the velocity micro frames 1,2288 MMK/s (micro frames per second) period of the PN sequence corresponds to 26.7 msec (80/3 MS). When enabled, the receiver in the mobile station extracts the signal of the pilot channel signal on a straight line, shown in Fig.1, for establishing synchronization with the base station.

In Fig.2 shows a receiver in a mobile station that receives signals from channel a direct line of communication from the base station.

As shown in Fig.2, the RF receiver 212 receives the RF signal transmitted from the base station, and then converts with decreasing frequency adopted by the RF signal group signal. Analog-to-digital (AC) Converter 214 converts the group signal output from the RF receiver 212 into digital data. The search unit 222 selects a channel signal, the pilot signal from the signal Pramogu the s channel to selection of the correlation values of the signal channel. A combiner 226 combines the output signals of the respective branches 231-23N.

As shown in Fig.2, the receiver of the mobile station comprises a search unit 222, N branches 231-23N and the combiner 226. The allocation of the pilot signal is performed by the search unit 222.

In Fig. 3 shows a timing diagram of signals of the downlink channel transmitted by the base station, in which the offset of the channel frame traffic put equal to 0.

As shown in Fig.3 numerical designation 311 shows 80 MS boundary of the base station, which is determined from a two-second boundaries of the global positioning System (EGR). The numerical designation 313 refers to the offset of the pilot signal of the base station. The numerical designation 315 refers to the boundaries of the three periods of expanding sequence within 80 MS, from which it becomes clear that one period of expanding sequence is 26.7 msec (80/3 MS). Here it is assumed that the expanding sequence is a PN sequence. Each period of expanding sequence is synchronized with 26.7 msec boundary of the frame where the alternate channel synchronization. With 80 msec frame will be called the second frame, and to 26.7 MS frame p is IG.4 shows the structure 80 MS per channel frame synchronization. For signal channel synchronization 80 MS frame, shows the digital symbol 412, consists of three 26,7 MS frames, each of which contains a set of bits in the US (Beginning of message) for synchronization in accordance with the period of the sequence of the pilot signal. For example, 80 msec period bit sync US for the period to 26.7 msec of the first frame is determined as "1" or "0" and the bits of the synchronization HAC's for the following 26,7 msec frames are defined as "0" or "1"). Therefore, the detection of synchronization bits US to "1" (or "0") 80 msec period detection means 80 MS signal channel synchronization.

The numerical designation 319 shows the boundaries of frames paging channel and channel traffic. For trafc channel 80 MS frame consists of four 20 msec frames. Therefore, from Fig.3 shows that in 80 MS period of the sync channel contains three to 26.7 MS frame, and channel traffic contains four 20 msec frame.

With reference to Fig. 3 and 4 will be given a description of the synchronization process performed between the base station and mobile station. Standard synchronization of the base station obtained from 80 MS boundary 311, which is determined from a two-second boundaries EGR. The pilot signal of the base station is shifted by the offset 313 pilot-ispolzovanie the same sequence, by installing this offset pilot signal in different ways for each of the respective base stations. The signals of the pilot channel signal for a straight line is repeated with a period to 26.7 msec, as shown by numerical designation 315. The channel signal synchronization punctuated/reverse punctuated with periods 26,7 msec, as shown by numerical designation 414, and this boundary is synchronized with the period of one sequence of the pilot signal. Therefore, when receiving the signal of the pilot channel signal to a mobile station in a mobile communication system corresponding to the standard IS-95, can accurately detect alternating/reversed alternating frame synchronization for channel synchronization, as shown in Fig.4.

Therefore, the mobile station shall set 80 MS boundary 317 channel synchronization. The sync channel for direct communication line transmits the bit synchronization US every 26,7 msec, as shown by numerical designation 414. Bit of US is set to "1" in the first to 26.7 MS frame and a "0" in the next two to 26.7 msec frames. The receiver of the mobile station becomes synchronized with 80 MS boundary, using the bits of the US channel synchronization. The mobile receiver hundred which stimulates the signal on the sync channel every 26,7 MS and determines to 26.7 MS frame from the demodulated bit US, "1", as of the beginning of the 80 MS boundary.

The structure of the straight line in Fig.1 and the synchronization procedure in Fig.3 and 4 are applicable in a mobile communication system corresponding to the standard IS-95, and with the speed micro frames 1,2288 MMK/sec. However, for high-speed data transfer and efficient system design in the system of IMT-2000 will increase the speed micro frames to use a wider bandwidth.

It is expected that in the mobile communication system (IMT-2000 will be used velocity micro frames, 3.6-12 times the speed micro frames in the current system, corresponding to the standard IS-95. Suppose that the velocity micro frames in the system of IMT-2000 will be raised to 3,6864 MMK/s, which is three times the speed micro frames in the is-95. In this case, if you use a PN sequence having the same period as the expanding sequence to an existing system for mobile communications IS-95, one PN sequence is reduced to 1/3 times, i.e. up to 80/9 msec. In this case, the procedure to obtain 80 MS sync channel synchronization becomes difficult. In particular, even when the mobile station initially receives the pilot signal due to the fact that it is not sainoi system with velocity micro frames 1,2288 MMK/sec.

One way around this problem is to use expanding sequence with a period that increases as speed increases micro frames. For example, if the velocity micro frames is increased three times, a period of expanding sequence also increases three times to save one expanding sequence equal to 26.7 msec. However, increasing the length of the PN sequence three times causes an increase in the time of the initial detection of the mobile station.

Therefore, if the velocity micro frames increases and becomes higher than the speed micro frames of the existing system IS-95, this requires the application of the new method of initial synchronization.

The invention

The present invention is a device and method for fast initial synchronization and frame synchronization of a received signal in a communications system spread spectrum.

Another objective of the present invention is to provide a device and method for fast initial synchronization and frame synchronization of a received signal using an extender LASS="ptx2">

In accordance with the present invention a device for signal transmission channel to the base station in the communication system mdcr. The signal has the first speed micro frames, which many times exceeds the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame. The device allows the receiver to synchronize the expanding sequence having the first speed micro frames with the first frame. The device comprises a generator of expanding sequence to generate expanding sequence having the first speed micro frames; generator combinations of clock pulses for generating combinations of clock pulses for selecting the first frame by changing the configuration expanding sequence having the first speed micro frames on the border of the first frame; and an expander for forming extend the synchronization code using the code extends, with the first speed micro frames, and combinations of pulses and expansion of the transmitted signal by extending the code the AI communication system mdcr. The received signal has the first speed micro frames, which many times exceeds the second speed micro frames, and contains the first frame having the second speed micro frames and the second frame, whose length exceeds the length of the first frame. The device adopts advanced signal using an extender code, with the first speed micro frames, which has the same sign when the duration of the first frame and has different signs at duration adjacent the first frame. The device includes a sphincter to compress the extended signal with an expanding sequence having the first speed micro frames, an orthogonal demodulator for orthogonally demodulating the signal of the pilot channel signal from the compressed signal, the decisive test device channel signal, the pilot signal to determine, did the sign of the signal of the pilot channel signal, and when detecting the change of the sign of the channel signal, the pilot signal boundary of the first frame; the receiver channel synchronization to determine the bounds of the first frame for channel synchronization in accordance with an output signal of a casting device for detecting synchronization bits in predetermined positions in the first Carnie and other tasks the characteristics and advantages of the present invention will become more apparent from the following detailed description accompanied by the attached drawings in which the same numeric designations shown the same parts. In these drawings:

Fig. 1 is a block diagram illustrating the structure of a direct line of communication normal communication systems mdcr;

Fig.2 receiver for a conventional communication system mdcr;

Fig. 3 is a timing diagram of a base station for a conventional communication system mdcr;

Fig.4 is a chart illustrating the bits of US in the channel synchronization;

Fig. 5A and 5B is a diagram illustrating the structure of the pilot channel signal and the structure of the expanding sequence, respectively, according to a variant implementation of the present invention;

Fig. 6 is a diagram illustrating the receiver expects a variable of the decision in accordance with the embodiment of the present invention;

Fig. 7 is a block diagram illustrating a receiver for calculation, which calculates the variable to solve, using the pilot signal in the mobile station in accordance with the embodiment of the present invention;

Fig. 8 is a timing diagram of the controller synchronization in the receiver mobile with eredet, when expanding the size of the interleave channel synchronization, in accordance with another embodiment of the present invention.

A detailed description of the preferred option

The preferred implementation of the present invention will be described below with reference to the accompanying drawings. The following description will not be further discussed well-known functions or constructions, as they will overload the invention with unnecessary detail and impedes understanding.

In the described communication system mdcr used the expanding sequence having the same length as the expanding sequence used in the is-95, for faster synchronization, even when the increase speed micro frames.

For this purpose the base station in accordance with the first embodiment of the present invention multiplies the expanding sequence on a combination of sync. Here the expanding sequence has the same period as extending the sequence used in the communication system, IS-95, and has a high speed micro frames. The combination of sync allows extending the sequences with high squushy to 26.7 msec durations, i.e. keep the same value for 26,7 msec duration and save a different value on the border to 26.7 msec duration. The mobile station then initially calculates the correlation value for an expanding sequence for initial synchronization, compresses the duration of N-microcode around the edge of one period of expanding sequence and identifies the combination of clock pulses, which varies by 26.7 msec border to ensure synchronization frames.

In accordance with the second embodiment of the present invention, the base station multiplies the expanding sequence on a combination of sync. Here the expanding sequence has the same period as extending the sequence used in the communication system, IS-95, and has a high speed micro frames. The combination of sync allows expanding sequence of high speed micro frames to maintain the same value for 80 MS duration and save a different value for the next 80 MS duration, i.e., to keep the same value for 80 MS duration and save a different value on the boundary of 80 MS duration. Mobile is high speed micro frames, for initial synchronization, compresses the duration of N-microcode around the edge of one period of expanding sequence and identifies the combination of clock, which is changed to 80 MS boundary to ensure synchronization frames.

The pilot channel signal transmitted from the base station in a straight line, constructed as shown in Fig.5A, and the signal in the channel, the pilot signal is inverted in the periods to 26.7 MS frame, as shown in Fig.5V.

Description of option implementation will be made by using an example in which the speed micro frames is 3,6864 MMK/sec. Therefore, in the embodiment, the period of the PN sequence is 215(=32.768) micro frames. Suppose, in this embodiment, the period of one PN sequence is 8,89 msec (80/9 msec), i.e. 1/3 of the period of the existing PN sequence. This means that the bandwidth in this embodiment, three times the bandwidth of the existing system for mobile communications IS-95.

Expanding sequence in accordance with the embodiment of the present invention is formed by multiplying the PN sequence short PE the Noi period, which exceed a short period of PN sequence. PN sequence having a period for 26.7 msec, is called an expanding sequence with the first speed micro frames, and PN sequence having a period 8,89 MS is called an expanding sequence with the second speed micro frames. The combination of the clock retains the same value during one period (=8,89 Mc) expanding sequence with the first speed micro frames, but can be changed on the boundary of the PN sequence. In this embodiment, the combination of clock, which is multiplied by the expanding sequence having the first speed micro frames, stores the same value during 3 periods of the PN sequence (=26,7 msec), with the first speed micro frames. However, the value of a combination of pulses is inverted from "+1" to "-1" or "-1" to "+1" on the border to 26.7 MS frame, where alternate channel synchronization. This extends the sequence with the first speed micro frames used for the pilot channel signal, sync channel, paging channel and channel traffic.

In this embodiment, to 26.7 MS frame is called Pervova station in accordance with the embodiment of the present invention. As shown in Fig.5A, description will be given of structures of the generator channel pilot signal generator sync channel and paging channel generator.

As for the generator channel pilot signal, then the signal on the pilot channel signal has all "1"-s or all "0" (zeros). The multiplier 114 multiplies the pilot signal by an orthogonal code for Wo orthogonal expansion of a signal.

As for the generator of the sync channel, the encoder encodes 1,2 Kbit/s input data signal channel synchronization. Can be used convolutional encoder R=1/3, K=9 as the encoder 121. Therefore, the speed of data-encoded symbols at the output of the encoder 121 becomes a 3.6 KS/s (symbols / sec). The repeater 122 repeats engrossingly on the output of the encoder 121 N times (N=2). In this case, the speed of data symbols at the output of the repeater 122 becomes a 7.2 KS/s Interleaver 123 punctuates the symbols output from the repeater 122 to prevent packet errors. As the interleaver 123 can be used a block interleaver. The signal Converter 126 converts the character data is a logical "0" and "1" is supplied from the interleaver 123, respectively, in the levels "+1" and "-1" and then demuxes the level converted data in the first signal 126, special orthogonal codesyncassigned to the channel synchronization for orthogonal expansion signals of the channel synchronization. The sync channel displays information about the position, information about the standard time and information about the long code of the base station and also displays information for a synchronization system between the base station and mobile station. As described above, the generator channel synchronization encodes the input signal of the sync channel and multiplies the encoded channel signal synchronization on special Walsh code Wsyncassigned to the channel synchronization of available Walsh codes, orthogonal expansion of the channel signal synchronization.

As for the paging channel generator, the encoder 131 encodes a 9.6 or 4.8 Kbps input paging channel. As the encoder 131 can be used convolutional encoder R=1/3 and K=9. Therefore, the speed of output symbols from the encoder 131 becomes a 28.8 KS/s or 14.4 KS/s Repeater 132 repeats the symbols received from the encoder 131, N times (N=1 or 2). In particular repeater 132 does not repeat characters at a speed of symbols for 28.8 KS/s, and repeats the characters once at a speed of characters to 14.4 KS/s to display the symbol is of packet errors. As the interleaver 133 is typically used block interleaver. The long code generator 141 generates a long code which is a code identifying the user. Thinner 142 thins long code in order to coordinate the speed of the long code with the speed of the output symbols from the interleaver 133. The logical element 143 XOR performs its function with an encoded paging signals from the interleaver 133, and a long code from a thinner 142, for scrambling the paging signal. The signal Converter 136 converts the character data is a logical "0" and "1", coming from logic element 143 exclusive OR, respectively, to levels "+1" and "-1" and then demuxes data converted levels in the I and Q branches. The multiplier 134 multiplies the scrambled paging signals for I and Q branches coming from the signal Converter 136, the orthogonal code Wpassigned paging channel orthogonal to the extension paging signals.

Orthogonal extended input signals of the respective channels are multiplied by expanding code SS synchronization for their expansion and converted with povysheva code SS synchronization. Generator 511 combinations of clock generates a combination of pulses P(t), which is inverted in the periods of the first frame to 26.7 msec from "+1" to "-1" or "-1" to "+1", as shown by the digital symbol 521 in Fig. 5V. Generator 513 PN sequence generates a PN sequence having a first speed micro frames, to broaden the spectrum. Here it is assumed that the PN sequence has a different PN sequences for the I and Q branches, and the number of micro frames PN sequences is 32768(= 215). The multiplier 515 multiplies the combination of clock pulses P(t) coming from the generator 511 combinations of pulses on the PN sequence supplied from the generator 513 PN sequences for the formation of extending code SS synchronization. Extend code SS synchronization served simultaneously on the multipliers 115, 125 and 135. Here extender code SS synchronization is expanding code first speed micro frames obtained by multiplying the dash clock on the PN sequence.

The multiplier 115 multiplies the output signal of the pilot channel signal from the multiplier 114 to extend code SS synchronization for the expansion of the channel signal, the pilot signal. The multiplier is the extension of the channel signal synchronization. The multiplier 135 multiplies the paging channel signal received from the multiplier 134, extending code SS synchronization to enhance signal peydzhingovogo channel.

Now, description will be given of operation of the generator channel pilot signal with reference to Fig. 5A and 5B. The channel signal, the pilot signal consisting of only "1" is multiplied by the orthogonal code Wo for channel pilot signal in the multiplier 114 to its orthogonal expansion. Advanced channel signal, the pilot signal is again multiplied by expanding code SS synchronization in the multiplier 115 for transmission after the expansion. Extend code SS sync is generated from the multiplier 515, which multiplies the combination of clock pulses P(t), shows a digital symbol 521, PN sequence with the first speed micro frames period of 32768. As shown, the digital symbol 521, the combination of clock pulses P(t) is inverted in periods 26,7 MS at a frame boundary, where are interspersed with the data on the sync channel. In addition, the extended channel signal, the pilot signal multiplied by expanding code SS synchronization in the multiplier 115, has an extended frequency band, so can be transferred 3 expanding sequence of the first speed microcut the synchronization is inverted in the first period to 26.7 MS frame.

When enabling the receiver, the mobile station receives a channel signal, the pilot signal transmitted from the base station, as shown by the digital symbol 523, shall receive PN sequence having the first speed micro frames. The orthogonal code used, as shown in Fig. 5B, is believed to be a Walsh code "0" (zero). In the same way as a regular method of obtaining, PN sequence of the first speed micro frames is obtained by calculating correlation values between the received signal and the locally generated PN sequence, for detecting position of having a higher correlation value. In the existing system for mobile communications IS-95 due to the fact that the period of one PN sequence coincides with 26.7 MS frame, where punctuated by the sync channel, the sync channel is demodulated as it is for synchronization of the second frame, which is 80 MS by synchronator using bits of US. However, if the velocity micro frames three times higher when using a PN sequence having a second speed micro frames, as in the is-95, one period of the PN sequence having the first speed microcadam embodiment, after receiving the PN sequence should align to 26.7 msec border of the channel frame synchronization, having a second speed micro frames, where alternate data sync channel, before demodulation channel synchronization. For this purpose, a characteristic feature of a combination of pulses P(t). In this embodiment, is generated by the combination of clock, which is inverted in synchronism with the edge of the frame, with the first period to 26.7 msec, as shown in Fig.5A and 5B.

Fig. 6 illustrates the channel pilot signal in a position where it is inverted combination of sync. As shown in Fig.6, the orthogonal code used for the expansion is believed to be a Walsh code "0" (zero).

As shown in Fig.6, the combination of clock pulses P(t), multiplied by the expanding sequence of the first speed micro frames, is inverted from "-1" to "+1". When expanding sequence of the first speed micro frames is PSH, channel pilot signal becomes - PSH before inversion and PSH after inversion. Here, if the result of compression of microcode N1after the inversion of PN is Xn-1, a result of compression of microcode N2after the inversion of PN is Xnthe variable Znthe solution is calculated by the formula:

Zn= |Xn-Xn-1|2is oneseli, and has a value approaching zero, in other positions. Using the same value for short durations N1and N2to detect the frame boundary using a more orthogonal element.

There are several ways to identify to 26.7 MS frame, based on the variable Znsolutions. In the same way the variable Znthe solution is calculated in each period of expanding sequence, with the first period of microcode 8,89 MS; when exceeded threshold, calculated variable solution is determined as the edge of the frame, where alternate channel synchronization. In another way, the variable Znthe solution is calculated every 8,89 MS; variables solutions for all hypotheses are compared among themselves to determine the position having the highest value at a frame boundary, where alternate channel synchronization.

After you determine to 26.7 msec border frame for channel synchronization, the receiver of the mobile station punctuates and decodes the signal on the channel synchronization periods of the first frame to 26.7 msec to detect bit US channel synchronization. Synchronization of the receiver is consistent with the 80 MS boundary through the establishment of 80 MS boundary channel ptx2">

Fig.7 illustrates a receiver for a mobile station in accordance with the embodiment of the present invention, which receives an extender sequence, with the first speed micro frames, and then sets the border of the first frame on the sync channel.

As shown in Fig.7, the multiplier 612 multiplies the received signal by extending the sequence of the first speed micro frames to compress the received signal. The multiplier 614 multiplies PSH compressed signal from the multiplier 612, the orthogonal code Wo for channel pilot signal orthogonal demodulation PN compressed signal. Therefore, the output signal from the multiplier 614 is PSH compressed orthogonal demodulated signal of the pilot channel signal.

The controller synchronization 616 generates a signal S1 representing 26,7 msec (which is equal to three periods of expanding sequence when the first speed micro frames with 8,89 msec period of the frame boundary, and the signal S2 representing the compressed duration, lasting from the beginning of microcode N1until the end of microcode N2. In Fig. 8 shows a time chart of the control signal from the controller 616 synchronization. In Fig.8 digital the major digital symbol 733, is the PN signal boundaries formed at the boundary of expanding sequence in the periods to 26.7 MS frame. The numerical designation 735 refers to the combination of clock pulses P(t) generated by the generator 618 combinations of clock pulses in response to the signal S1, and digital 737 designation refers to the signal S2, which is active from the beginning of microcode N1until the end of microcode N2being centered with respect to the signal S1, when 8,89 MS a frame boundary expanding sequence having the first speed micro frames. Activated the duration of the signal S2 becomes a temporary period during which integrates the compressed pilot signal.

As described above, the generator 618 combinations of clock generates a combination of pulses P(t) in response to the signal S1 generated by the synchronizing control 616. The multiplier 620 multiplies the output signal of the pilot channel signal from the multiplier 614 on a combination of pulses generated by the generator 618 combinations of sync. Accumulating adder 622 integrates the signal from the multiplier 620, in response to the signal S2 generated by the synchronizing control 616. The squarer 624 squares integrated signi signal.

As shown in Fig.7 and 8, the receiver compresses the received signal using the first expanding sequence and a Walsh code for the pilot channel signal and then multiplies the compressed signal on a combination of pulses P(t) coming from the generator 618 combinations of pulses which is inverted from "+1" to "-1" or "-1" to "+1" in each period of the first expanding sequence. Advanced signal multiplied by a combination of pulses P(t) accumulating accumulating the adder 622 within the integral length N, where N=N1+N2. Accumulated signal is erected in the square Quad 624. To calculate the value of energy that is equal to the variable Znsolutions. The controller synchronization 616 generates a signal S1 representing a boundary for 26.7 MS frame duration, and the signal S2 representing the compressed duration, lasting from the beginning of microcode N1until the end of microcode N2. The signal S2 representing the compressed duration, controls the duration of the accumulation accumulating adder 622. In addition, the signal S1 representing one period of the first expanding sequence, determines the position, in which the output combination of the word clock signal R'(t) from the generator 618 combinations of sin is accordance with the second embodiment of the present invention.

As described above, the method of finding the boundaries of the frame in accordance with the first embodiment of the present invention is a method in which data is transmitted using expanding sequence with period frame, whose length is less than or 26.7 MS frame and then set the frame boundary using a combination of sync. In the first embodiment, the frame boundary is established while maintaining the boundary to 26.7 MS frame, where alternate channel synchronization. However, in the second embodiment, the length of the frame where the alternate channel synchronization, increased to 80 MS and the establishment of synchronization 80 MS frame by bit US is replaced by a combination of sync. The increased length alternation (rotation) improves performance by reducing frequent demodulation carried out every 26,7 MS in the first embodiment.

Fig.9 illustrates the format of the channel signal, the pilot signal in accordance with a second embodiment of the present invention. The transmitter of the base station has the same structure as the transmitter of Fig. 5A. However, in the second embodiment, the combination sinhro the e frame, as shown, the digital symbol 921, and the PN sequence generated by generator 513 PN sequence has a period frame 8,89 msec. The second variant of implementation differs from the first variant of realization of the fact that establishing synchronization for 80 MS frame can be carried out without the use of bit US. In addition, in the second embodiment, interleaving for channel synchronization can be performed every 80 MS. Therefore, the combination of clock pulses P'(t) coming from the generator 511 combinations of pulses is inverted every 80 MS, as shown by the digital symbol 921.

As shown in Fig.5A and 9, description will be given of the operation of the second variant of implementation of the present invention. When enabled, the receiver receives the expanding sequence of the first speed micro frames for establishing synchronization with 8,89 msec periods. After that, the receiver is in 80 MS sync, using a combination of sync. At this point, the receiver works in the same way as in the first embodiment. However, in the second embodiment, due to the fact that during the 80 MS can be transferred to nine expansion posledovatelej>ndecisions of the nine variables of the solution. The receiver can make a statement about the establishment of synchronization, when the variable Znsolution exceeds the threshold, and report the position with the highest variable solutions, as about 80 MS boundary of the frame, by comparison of the nine variables of the solution. For this purpose, the receiver has the same structure as the receiver of the first variant implementation, shown in Fig.7. However, in the second embodiment, due to the fact that you can install 80 MS boundary using a combination of clock synchronizing control 616 generates a signal S1 80 msec periods. In this case, you can avoid the usual procedure of synchronization by bit US.

As described above, in the communication system spread spectrum base station multiplies the expanding sequence for channel pilot signal combination, which supports the same value for one short period of the sequence, but you can change this setting on the edge of one short period and to transmit the multiplied value. The mobile station then initially calculates a correlation value with an expanding sequence short period done for the coherence of the short period to identify combinations to ensure synchronization of the frame data.

Although the invention has been shown and described with reference to some preferred variations in its implementation, specialists in this field will be clear that it can be made various changes in form and detail without departing from the essence and scope defined by the attached claims.

1. A device for signal transmission channel from the base station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames that exceed the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame synchronization expanding sequence having the first speed micro frames, the first frame containing the expanding sequence generator for generating expanding sequence having the first speed micro frames, generator combinations of clock pulses for generating combinations of sync with the aim of identifying the first frame by changing the configuration of the expanding sequence having Pervii, using widening the code having the first speed micro frames, and a combination of pulses and expansion of the transmitted signal by expanding a sync code.

2. The device under item 1, characterized in that the first frame is a frame for channel synchronization, and the second frame is a frame for the paging channel.

3. The device under item 1, characterized in that the combination of clock pulses have the same sign when the duration of the first frame and has a different sign for the durations of adjacent first frame.

4. The device according to p. 3, characterized in that the channel transmitting device is transmitting device synchronization, and the first frame for channel synchronization contains synchronization bits for synchronization frames.

5. The device according to p. 4, characterized in that the first frame is equal to 26.7 MS, and the second frame is equal to 80 MS.

6. The device according to p. 4 characterized in that the first speed micro frames three times higher than the speed micro frames system IS-95.

7. A device for signal transmission channel to the base station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal is first the duration of expanding sequence, having a second speed micro frames and the second frame, whose length exceeds the length of the first frame synchronization expanding sequence having the first speed micro frames, the first frame containing the expanding sequence generator for generating expanding sequence having the first speed micro frames, generator, combination of clock pulses for generating combinations of sync with the aim of identifying the second frame by changing the configuration of the expanding sequence having the first speed micro frames on the border of the second frame, and an expander for expanding the transmitted signal by expanding sequence and combination of sync.

8. The device for receiving the channel signal to the mobile station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames, which many times exceeds the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame, for receiving the extension of the same sign when the duration of the first frame and has different signs at duration adjacent the first frame, containing the sphincter to compress the expanded signal expanding sequence having the first speed micro frames, an orthogonal demodulator for orthogonally demodulating the signal of the pilot channel signal from the compressed signal, the decisive test device channel signal, the pilot signal to determine, have you changed the channel signal, the pilot signal according to the sign, and when detecting the change of the sign of the channel signal, the pilot signal for the boundary of the first frame, the receiver channel synchronization to determine the bounds of the first frame for channel synchronization in accordance with an output signal of a casting device and detection of synchronization bits for the specified provisions of the first frame to ensure synchronization of the second frame.

9. The device under item 8, characterized in that the first frame is a frame synchronization signal, and the second frame is a frame of the paging channel.

10. The device under item 8, characterized in that the combination of clock pulses have the same sign when the duration of the first frame and has different signs at duration neighboring first frame.

11. The device according to p. 10, characterized in that the receiver channel is at ustwo contains the generator of combinations of clock pulses for generating combinations of pulses a mixer for mixing the orthogonal demodulated extend the code with the combination of clock pulses, the detector correlation values for detecting correlation values by accumulating micro frames on the border for the duration borders extend the code with the first speed micro frames, solver for the boundary of the first frame by checking detektirovanie correlation values.

13. The device according to p. 12, characterized in that the first frame is equal to 26.7 MS, and the second frame is equal to 80 MS.

14. The device according to p. 12, wherein the first speed micro frames three times higher than the speed micro frames system IS-95.

15. The device for receiving the channel signal to the mobile station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames that exceed the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame, for receiving the extended signal using the extender code with pernici when the durations of adjacent first frame, containing the sphincter to compress the extended signal with an expanding sequence having the first speed micro frames, an orthogonal demodulator for orthogonally demodulating the signal of the pilot channel signal from the compressed signal, the decisive test device channel signal, the pilot signal to determine changes to the signal by the sign signal of the pilot channel signal, and when detecting the change of the sign of the channel signal, the pilot signal for the boundary of the first frame, and the receiver channel synchronization to determine the boundaries of the second frame for channel synchronization in accordance with an output signal of a casting device in order to detect synchronization of the second frame.

16. The method of signal transmission channel to the base station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames that exceed the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame synchronization expanding sequence having the first speed ICRI is the speed micro frames, generate a combination of clock pulses for selecting the first frame by changing the configuration of the expanding sequence having the first speed micro frames on the border of the first frame shape extending synchronization code by mixing extend the code with the first speed micro frames, with a combination of clock and extend the transmitted signal by expanding a sync code.

17. The method of signal transmission channel to the base station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames that exceed the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame synchronization expanding sequence having the first speed micro frames with the first frame, namely, that generate an extender sequence, with the first speed micro frames, generate a combination of clock pulses for selecting the second frame by changing the configuration rasshirayet synchronization by mixing extend code having first speed micro frames, with a combination of pulses and extend the transmitted signal by expanding a sync code.

18. The method of signal reception channel for the mobile station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames that exceed the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame, for receiving the extended signal using the extender code, with the first speed micro frames, which has the same sign when the duration of the first frame and has different signs at duration adjacent the first frame, namely, that compresses the expanded signal with an expanding sequence having the first speed micro frames, orthogonal demodulator the channel signal, the pilot signal from the compressed signal, check the channel signal, the pilot signal to determine any changes to the sign signal of the pilot channel signal, and when detecting the change of the sign of the channel signal, the pilot signal is to be what litecom establish and identify the bits of the synchronization for the specified provisions of the first frame with the goal of establishing synchronization of the second frame.

19. The method of signal reception channel for the mobile station in the communication system, multiple access, code-division multiplexing (mdcr), and the channel signal has the first speed micro frames that exceed the second speed micro frames, and contains the first frame with a duration of expanding sequence having a second speed micro frames and the second frame, whose length exceeds the length of the first frame, for receiving the extended signal using the extender code, with the first speed micro frames, which has the same sign when the duration of the first frame and has different signs at duration adjacent the first frame, namely, that compresses the expanded signal with expanding sequence having the first speed micro frames, orthogonal demodulator the channel signal, the pilot signal from the compressed signal, check the channel signal, the pilot signal to determine any changes to the sign signal of the pilot channel signal, and when detecting the change of the sign of the channel signal, the pilot signal sets the border of the second frame and define the boundary of the second frame for channel synchronization in accordance with the result of the establishment to identify sync

 

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