Improving the efficiency of communication by introducing one signal to another signal

 

The invention relates to telecommunication systems. The technical result is to increase efficiency through the introduction of a signal into another signal. When the transmission of communication signals in the receiver via the transmission channel, the transmitter generates a composite signal that includes information from which the receiver can detect the signal in channel estimation and other control information. The composite signal is transmitted over the transmission channel. This leads to increased bandwidth, reduced requirements for transmit power and reduce interference in the transmission channel. 4 C. and 26 C.p. f-crystals, 11 ill.

Technical FIELD the Invention relates to improving the efficiency, in particular through the introduction of one signal into another signal.

The PRIOR art of Fig.1 illustrates an example of a typical wireless communication system. In the example shown in Fig. 1, the base station 11 communicates in two directions with multiple mobile stations 13 through radio signals passing through the transmission channel 15. This configuration is typical for cellular telecommunication systems and other wireless systems. Technology transfer can be subjoining access with time division multiplexing (MDRC) and multiple access frequency division multiplexing (MDCRC).

Fig. 2 is a block diagram that depicts an example of a typical transceiver 21, which was included in each of the mobile stations 13 and the base station 11 shown in Fig.1. The transceiver 21 transmits radio signals on channel 15 transfer from other communication stations. The transceiver includes a transmitter 17 and the receiver 19. The usual device 12, the processing in the transmitter generates various signals in the conventional transmitting section 14, which provides the coordination of signals from the device 12, the processing in the transmitter with the antenna 20, which transmits appropriate signals on the transmission channel 15. The antenna 20 also receives radio signals from the transmission channel 15 and outputs them to the receiving section 16, which converts the signals received from the antenna 20, the signals that are introduced in the conventional device 18 processing in the receiver.

The processing device 12 in the transmitter generates the relevant information, i.e. the message to be transferred over the communication channel to the receiving communication station, and generates control signals, such as pilot symbols, information about the capacity management and other control signals. Important information, pilot symbols, information management capacity and drustvo 18 processing in the receiver.

Information management capacity or symbols of power control (often referred to as the control bits of the transmitted power (UPM)) are regularly submitted to compensate for such changes, as the fading in the communication channel between the transmitting and receiving stations. The pilot symbols are transmitted to the receiver for channel estimation and coherent detection of the received signals. The pilot symbols transmitted by the transmitter, already known to the receiver in advance, so that the receiver can evaluate the conditions in the channel by comparing the actually received pilot symbols with the expected pilot symbols.

The pilot symbols and the symbols of power control make up a significant part bothered signals transmitted on the transmission channel. In addition, these signals require significant transmit power. Pilot symbols and control characters power is usually transmitted either in the same physical channel as material information, or control channel that is separate from the information channel. As symbols of power control and pilot symbols can be transmitted in the directions or upward (reverse) or descending (straight) line communication system shown in Fig. 1. In abichandani IS-95, up to 20% of the total transmit power used for transmitting the pilot symbols, and control characters with a capacity of up to 10% of all of the symbols transmitted over the channel. These numbers are typical, and other basic MDCRC systems, such as relevant standards CODIT ("Test bench code for channel separation") and broadband MDCRC developed in Japan and Europe.

Fig. 3 depicts an example of transmission of pilot symbols, and symbols of power in the transmission channel radio system, in accordance with which the pilot symbols and the symbols of power control is transmitted at a particular physical channel, which is separated from the physical channel used for transmitting signals of the essential information. Regardless of transmitted pilot symbols and the symbols of power control on a separate channel or the same channel as the signals of the essential information, the present invention assumes that any reduction in the number of pilot symbols and/or characters power control will result in a corresponding increase in bandwidth channel is available, the corresponding reduction in the required transmit power and the corresponding reduction of interference in the channel re is sposobnosti available channel, reduced transmitted power and reduced noise while ensuring the transmission and receipt of all required pilot symbols and information management capacity.

The present invention provides the transmission and reception of all required pilot symbols and information management capacity with a simultaneous improvement in comparison with conventional systems, one or more of the following characteristics: desired bandwidth, the required transmitted power and interference in the transmission channel. This is achieved by introducing information management capacity of the pilot symbols.

The above advantages of the present invention can also be achieved by introducing into the pilot symbols of the control information different from the information management capacity. In addition, the aforementioned method of introduction of the control information in the signal channel estimation (i.e., pilot symbols) can profitably be used in wired communication and wireless communication systems.

A BRIEF description of the DRAWINGS Fig. 1 is an example of a conventional radio system, which can be implemented in the present invention.

Fig. 2 is an example of a typical transceiver, which can be used napravleniya power in a conventional radio system.

Fig.4 is an example of the transmitter corresponding to the present invention, for use in the transceiver of a wireless system.

Fig. 5 is an example of a receiver corresponding to the present invention, for use in the transceiver of a wireless system.

Fig.6 is an example implementation of block allocation shown in Fig.5.

Fig.6A is another example of a block allocation shown in Fig.5.

Fig. 7 is a block diagram illustrating an example of operation of the transmitter shown in Fig.4.

Fig. 8 is a block diagram illustrating an example sequence of operations of block allocation shown in Fig.5 and 6.

Fig. 9 is a block diagram illustrating another example of the sequence of operations of block allocation shown in Fig.5 and 6.

Fig.10 numerical examples corresponding to the operations of the transmitter and receiver shown in Fig.4-6.

Fig. 11 is an example of a composite signal that includes information about the pilot symbols and information management capacity in accordance with the invention.

The DETAILED DESCRIPTION of Fig. 4 and 5 are examples of the implementation of the transmitter and receiver in accordance with the present invention for use in the communication stations of a radio communication system, such as the transceivers mobilnet the generator 44 of the composite signal, connected between the transmitting section 14 and section 12 of the processing in the transmitter shown in Fig.2. The generator 44 of the composite signal to generate a composite signal that includes information about common pilot symbols and the symbols of power taken from the normal outputs 23 and 27 normal processing section 12 in the transmitter. The generator 44 composite signal includes an encoder 41 for encoding symbols of power control, which are typically issued at the output 27 of section 12 of the processing in the transmitter. The encoder 41 assigns some code that displays information about the management of power, and outputs the code at the output 43. Encoded control information of the power output 43 is then used to modulate the pilot symbols, which are typically issued at the output 23 from the cooling processing in the transmitter.

The modulator 45 receives as input signals the pilot symbols from the output 23 and the encrypted information of the power control output 43. Encoded data output control output 43 is used to modulate the pilot symbols from the output 23, and the output of the modulator 45 is connected to the normal input 24 of the transmitting section 14. The composite signal represents pilot symbols, the modulated information management is under 14 processes the composite signal at the input 24 of the same in the usual way, she handles the pilot symbols, usually taken from the output 23 of section 12 of the processing in the transmitter in a known technical solution shown in Fig.2.

Information management capacity, usually issued at the output 27 of the device 12, the processing in the transmitter will indicate whether to increase or decrease the transmitted power, i.e., increase or decrease power. The device 12, the processing in the transmitter usually chooses an increase or decrease in accordance with the current conditions in the channel. As symbols of power control is not actually transmitted, the device 12 need only be output at the output 27 of the indication of an increase or decrease power, and not a real symbol of power control. In any case, the encoder 41 may provide the information at the output 43, as described below.

According Fig.3, since each block 31 information pilot symbols includes four pilot symbol, namely 1111, as shown in Fig.3, the encoder 41 in this example, outputs a code 43 information management capacity, including four symbols to be modulated in the modulator 45, four pilot symbols. The columns 111 and 112 in Fig.10 represent the signal at the output 43 of the encoder 41 in response to specify the STI, if the normal exit 27 indicates "higher power", then the encoder 41 generates 1111, and if the output 27 indicates "power reduction", the output 43 of the encoder will be 1100. It should be noted that the code 1111 "increase" orthogonal code 1100 "reduce". This orthogonal relationship facilitates efficiency demodulation of modulated (composite) signal in the receiver, as will be seen below. Column 113 in Fig.10 shows the composite signals issued from the modulator 45 and received at the input 24 of the transmitting section 14 when to modulate the pilot symbols are codes increase (1111) or decrease (1100) to exit 43 (see columns 111 and 112). In Fig.10 shows two different examples of pilot symbols, namely 1111 and 0000. Zeros in Fig.10 shows values of "-1".

The receiver, shown for example in Fig.5, receives the composite signal from the interface 15 of the radio communication through the antenna 20. The receiving section 16 processes the composite signal in the same conventional way she handles the pilot symbols in a known technical solution shown in Fig.2. Block 51 allocation has an input connected to the normal output 25 pilot signals normal receiving section 16. Block 51 allocation allocates the original pilot symbols and source information management Masaccio 18 processing in the receiver to the input 26, usually used for receiving pilot symbols, as shown in Fig.2. Block 51 selection delivers the usual symbols of power control input 28, which is usually served symbols of power control (see Fig.2).

Fig.6 illustrates an example implementation of block 51 of the selector shown in Fig. 5. In unit selection, shown in Fig.6, the composite signal received from the output 25 of the receiving section 16, is fed to a pair of demodulators 61 and 63. According to the columns 111 and 112 shown in Fig.10, the demodulator 61 also receives the code 1111 "increase power" which demodulate modulated pilot symbols. Similarly, the demodulator 63 also receives the code 1100 "reduce power" which demodulate modulated pilot symbols. The respective outputs of the demodulators 61 and 63 are connected to the corresponding accumulating the adders 62 and 64. Each accumulating adder calculates the sum of the demodulated pilot signals issued from the associated demodulator. The symbol T-1in the feedback circuit of each accumulating adder 62 and 64 displays the time duration of one symbol, so that when each pilot symbol, it will be appropriately PR and 116 in Fig.10 respectively illustrate the state of the outputs of the demodulators 61 and 63, when the respective inputs of the demodulators 61 and 63 is receiving the modulated pilot symbols (i.e., a composite signal) specified in column 113. For example, if a line 119, column 113 is specified modulated pilot signal 1100, the result in column 114 is a signal 1100, issued from the demodulator 61 and column 116 - signal 1111, issued from the demodulator 63. As shown in line 119, column 115 signal 1100, issued from the demodulator 61, is summed with the contents of the accumulating adder 62 to issue the "0", with zeros at 1100 displays the value "-1". Similarly, line 119, column 117 of Fig.10 shows that the signal 1111, issued from the demodulator 63, added accumulation to $ 4, available in nakaplivaya the adder 64. Because the code 1111 increasing the capacity of orthogonal code 1100 reduce power signals issued from the accumulative adders 62 and 64, as shown in Fig.10, ideally maximally different from each other. Although orthogonal codes are likely to provide optimal efficiency during implementation of the invention can be applied to other suitable codes.

If, as in the above example, accumulating adder 64 gives a larger value than is accumu is isoamsa modulator 45 to modulate the pilot symbols. Conversely, if the accumulating adder 62 accumulates more largest sum value, this indicates that the code 1111 increase the power of the demodulator 61 issued from the output 41 of the encoder and is used by the modulator 45 to modulate the pilot symbols. Line 118 in Fig.10 illustrates an example of when to modulate the pilot symbols used code 1111 power increase (see line 118, column 112). The amount accumulated in nakaplivaya the adder 62, is equal to 4 (line 118, column 115), and the amount accumulated in nakaplivaya the adder 64 to 0 (line 118, column 117).

According Fig.6, the comparator 65 units connected to storing the adders 62 and 64, compares the magnitude of the amounts calculated accumulating the adders, and controls the selectors 66 and 67, respectively. If accumulating adder 62 has a large amount of the output signal of the comparator units selects a character to increase power to pass through the selector 67 to the input 28 of section 18 of the processing in the receiver and selects the contents of the buffer 68 to pass through the selector 66 to the input 26 of section 18 of the processing in the receiver. Conversely, if the amount accumulated accumulating the adder 64 is greater than the sum accumulated accumulating the adder 62, the output and the input 28 of section 18 of the processing in the receiver and selects the contents of the buffer 69 to pass through the selector 66 to the input 26 of section 18 of the processing in the receiver.

Buffers 68 and 69 are used for buffering the output signals of the demodulators 61 and 63 as long as the comparator 65 units will not be able to determine on the basis of the amounts accumulated in accumulating the adders 62 and 64 which of the demodulators 61 and 63 must give the original pilot symbols. That is, the demodulator 61 will issue the original pilot symbols, if to modulate the pilot symbols in the transmitter used code 1111 increase the power, and the demodulator 63 will issue the original pilot symbols, if to modulate the pilot symbols in the transmitter used code 1100 reduce the power. Thus, the demodulators 61 and 63, respectively, define the channels to increase capacity and decrease capacity. These channels together indicate the comparator 65 which code power control was used to modulate the pilot symbols and what demodulator issued the original pilot symbols. If the amount is accumulating adder 62 is greater than accumulating adder 64, the selector 67 selects the symbol of the power increase, and in the selector 66 selects the output signal of the demodulator 61 (buffer 68), and glyph of lesser power and output signal demodulator 63 (buffer 69) are selected in the selectors 67 and 66, respectively, if the amount of nakasuot General selector, which responds to signals from the accumulative adders 62 and 64 by appropriate selection of the selectors 66 and 67.

For modulation and/or demodulation pilot symbols you can use any desired pair of codes (in the optimal case, the orthogonal codes). In addition, for power control with a higher resolution than just increase the power and reduce the power, you can use any desired number of codes (for example, more than two codes). This higher resolution will require additional channels modulators and accumulative adders, such as that indicated by the positions 61-62 and 63-64, namely one additional channel modulator and accumulating adder for each additional code beyond the two shown in Fig.6. This is shown by the example of block allocation shown in Fig.6A. In this example, the comparator 65 will choose the channel that has the largest amount of nakaplivaya the adder of this channel.

Fig.7 illustrates the above-described operation with respect to the transmitter shown in Fig.4. First, at step 71 determines whether prepared pilot symbols and the symbols of the power control section 12 of the processing in the transmitter. If the pilot symbols and the symbol 41. After that, at step 75, the pilot symbols are outputted to the output 23 of section 12 of the processing in the transmitter modulate the modulator 45 code control power supplied at the output 43 of the encoder 41. After that, at step 77 modulated pilot symbols transmitted via the radio interface in the normal mode, and returns control procedures to waiting for the next pilot symbols and symbols of power control on the stage 71.

Fig. 8 depicts the above-described operation with respect to the channel demodulators and accumulative adders shown in Fig.6. For example, for channel modulator 61 and accumulating adder 62, if the information about the pilot symbols is accepted (step 81) from the output 25 of the receiving section 16, the accumulating adder 62 is reset to zero at step 83 and the demodulator 61 attempts to demodulate the pilot signal at step 85. After that, at step 87, the pilot signal from the demodulator 61 is added to the contents of the accumulating adder 62 and is stored in buffer 68. Steps 85 and 87 are repeated as long as the demodulator 61 will not perform demodulation of received pilot symbols. If at step 89 is determined that the demodulator 61 has processed the received pilot symbols, then at step 88 the contents of neoplasia the following information to the pilot symbols on the stage 81. Although the procedure with reference to Fig.8 is described with reference to channel increasing the capacity of containing the demodulator 61, accumulating adder 62 and the buffer 68, the processing procedure in accordance with Fig.8 can also be described with reference to the channel reduce the power that contains the demodulator 63, accumulating adder 64 and the buffer 69.

Fig. 9 illustrates the selection operation performed by the comparator 65 units and multiplexers 66 and 67 for the issuance of required characters power control and pilot symbols to the inputs 26 and 28 of section 18 of the processing in the receiver. First, at step 91 determines whether the content received (amount) accumulative adders 62 and 64. If received, then at step 93, the comparator 65 compares values the value of the content accumulating adder 62 with the amount of content is accumulating adder 64. If at step 95 is determined that the contents of the accumulating adder 62 more, the phase comparator 97 65 selects the symbol of the increase in the multiplexer 67 and selects the buffer 68 of the multiplexer 66. If at step 95 is determined that the contents of the accumulating adder 64 is more, the phase comparator 97 65 selects the symbol of a decrease in the multiplexer 67 and selects the buffer 69 in the multiplexer 66. After C multiplexer 67 and the selected pilot symbols from the multiplexer 66 are issued to the appropriate inputs 28 and 26 of section 18 of the processing in the receiver. Then, in step 91, the comparator 65 is waiting for the next payments of demodulators 62 and 64.

For specialists in the art it is obvious that the particular embodiments of described above in connection with Fig.4-10, can easily be implemented in the form of improvements in hardware, software, and their combination in those parts of the ordinary of the radio transceivers that process pilot symbols and the symbols of power control.

Since the information about the symbols of power control is introduced in the information about the pilot symbols to create a composite signal in accordance with the invention, there is no need to transmit particular information symbol power control, so that the symbols of power control, indicated by the position 32 in Fig.3, can be excluded from the transfer, thus ensuring the achievement of the aforementioned goals, including increasing the capacity of the available channel (i.e., the decrease transmission time transmission channel), the increase in transmit power and noise reduction. The composite signal 100, which includes all the information about the pilot symbols and the symbols of the power control shown in Fig.11. As can be seen from comparison with Fig.3, integral with the main signal, is depicted in Fig.11, carries information about both the pilot symbols and the symbols of power control.

Although the above examples provide for the introduction of the information management capacity of pilot symbols in a communication system, the invention can also be used for the introduction of pilot symbols of the control information of other types, for example, information about the frame rate, the information of the speech codec, information transfer speeds of data elements, commands the updated positions, etc. Besides the above-mentioned methods, relevant to the invention are also applicable to systems wired connection. In many conventional systems, a wired connection, such as modems, use the alarm based on the test sequences. These test sequences are used in systems wired to perform the functions of channel estimation of transmission, similar to those for which the radio communication systems are pilot symbols.

Although described in detail possible specific embodiments of the present invention, it does not restrict the scope of the invention that may be implemented in various specific embodiments.

the first device to issue the pilot signal and other control information, used by the receiver, generator, composite, serving the introduction mentioned the other control information in the pilot signal and having an input connected to the device for receiving the pilot signal and other control information, and the generator of the composite signal has an output for forming in response to the pilot signal and other control information of a composite signal comprising a composite of information from which the receiver can detect the pilot signal and other control information, and transmitting interface connected to said generator output composite signal to ensure alignment between the generator of the composite signal and the transmission channel.

2. The transmitter under item 1, characterized in that the generator of the composite signal includes a modulator connected to the input for receiving the pilot signal, and an encoder connected to the input for receiving the aforementioned other control information, and the encoder has an output for issuing a coded control information representing mentioned other control information, a modulator connected to the output of the encoder to modulate the pilot signal mentioned coded other control information, for it referred to a composite signal.

3. The transmitter under item 1, characterized in that the composite signal requires less transmission time transmission channel than the time required to transmit the pilot signal and said other control information in the form of separate signals.

4. The transmitter under item 1, characterized in that the composite signal requires less transmit power than the power required to transmit the pilot signal and said other control information in the form of separate signals.

5. The transmitter under item 1, characterized in that the composite signal creates less interference in the transmission channel than the interference that may be generated when the transmission of the pilot signal and said other control information in the form of separate signals.

6. The transmitter under item 1, characterized in that the transmission channel includes a transmission channel, multiple access, code-division multiplexing (MDCRC) cellular communication system.

7. The transmitter under item 1, characterized in that the transmission channel is a radio channel, and the pilot signal includes pilot symbols used for estimation of the radio channel.

8. The transmitter under item 7, characterized in that the said other control information includes information to control power used etc what about the transmission channel, containing block allocation, having an input for receiving a composite signal formed by the transmitter and which includes information indicating the signal channel estimation and other control information that is used by the receiver and the power allocation has an output connected to said input signal of the channel estimation and the said other control information in response to the composite signal, the block selection additionally includes many of demodulators connected to said input and associated with the respective demodulation codes for demodulation mentioned composite signal for each demodulates codes and demodulates codes accordingly provide numerous control indications for possible inclusion in the above-mentioned other control information, and a host interface connected to said input unit of allocation for the implementation of the agreement between the block selection and the transmission channel.

10. The receiver under item 9, wherein the block selection includes accumulate adders, respectively connected to the demodulators to calculate the appropriate amounts in response to output signals, pay the selector, having an input connected to storing the adders, to receive from them the above-mentioned amounts and to issue in response to the above-mentioned sum signal of the channel estimation and the said other control information, and a selector connected to the output of block allocation for the issuance to him of a signal channel estimation and the said other control information.

12. The receiver on p. 11, wherein the block selection includes many of buffers respectively connected to the demodulator, for receiving from them and storing the respective output signals of the demodulators, and one of the output signals of the demodulators includes a signal channel estimation, these selector compares the stated amounts and in response to the above-mentioned comparison issues a control output signal to indicate which of the output signals of the demodulators in the buffers includes a signal channel estimation.

13. The receiver under item 9, characterized in that the transmission channel includes a transmission channel MDCRC cellular communication systems.

14. The receiver under item 9, characterized in that the transmission channel is a radio channel and signal channel estimation includes pilot symbols used for estimation of the radio channel.

15. The receiver under item 14, is great for ispolzuemuyu when controlling transmit power in the radio channel.

16. The mode of transmission of communication signals in the receiver by the transmission channel, comprising the steps of issuing the pilot signal and other control information that is used by the receiver, generating in response to the pilot signal and other control information of a composite signal that includes information from which the receiver can detect the pilot signal and other control information, and a generation step additionally includes the step of introducing mentioned other control information in the pilot signal.

17. The method according to p. 16, wherein the generation step includes the modulation of the pilot signal encoded information representing mentioned other control information.

18. The method according to p. 16, characterized in that it includes the transmission of a composite signal to the receiver via the transmission channel using a smaller transmission time transmission channel than the time required to transmit the pilot signal and said other control information in the form of separate signals.

19. The method according to p. 16, characterized in that it includes the transmission of a composite signal to the receiver via the transmission channel using a lower transmit power than the power required to transmit the pilot signal and upominaet transmitting the composite signal to the receiver via the transmission channel, moreover, the above-mentioned phase transfer creates less interference in the transmission channel than the interference that may be generated when the transmission of the pilot signal and said other control information in the form of separate signals.

21. The method according to p. 16, wherein the channel information includes channel MDCRC cellular communication systems.

22. The method according to p. 16, characterized in that the transmission channel is a radio channel, and the pilot signal includes pilot symbols used for estimation of the radio channel.

23. The method according to p. 22, characterized in that the said other control information includes information of the power control used to control transmit power in the radio channel.

24. The method of operation of a receiver for receiving communication signals from a transmitter on the transmission channel, comprising the steps of receiving a composite signal formed by the transmitter and containing information indicating the signal channel estimation and other control information that is used by the receiver, and the selection signal of the channel estimation and other control information from the composite signal, and the phase selection additionally includes demodulation of the composite signal corresponding demodulation korovou control information.

25. The method according to p. 24, wherein the step of allocating includes the calculation of the corresponding amounts in response to respective output signals generated by the phase demodulation of the composite signal demodulation codes.

26. The method according to p. 25, wherein the step of allocating includes the signal channel estimation and other control information in response to the stated amounts.

27. The method according to p. 26, wherein the step of allocating includes the memorization of the respective output signals generated by the phase demodulation of the composite signal demodulation codes, and the step of issuing includes determining, based on comparison of the above-mentioned amounts, the fact that one of the memorized output signal comprises a composite signal, and the selection mentioned one memorized composite signal.

28. The method according to p. 24, wherein the channel information includes channel MDCRC cellular communication systems.

29. The method according to p. 24, characterized in that the transmission channel is a radio channel and signal channel estimation includes symbols channel estimation is used to estimate the channel.

30. The method according to p. 29, characterized in that the said other control II in the air.

 

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