Device and method for transmitting and receiving with decreased relation of pike power to average power in mobile communication system with orthogonal multiplexing with frequency separation

FIELD: mobile telecommunication systems.

SUBSTANCE: device for decreasing relation of pike power to average power signal, sent along N(=2r) sub-bearing lines in transmitting device, having encoders for block encoding of w input data, where r - real number > 2, and output of N code symbols, has: serial-parallel converter for transforming data flow to w-(r-2) parallel data flows, where w - length of information word, first coder for receipt of w/2 parallel data flows from w-(r-2) parallel data flows from serial/parallel converter, block encoding of w/2 parallel data flows and output of N/2 first code symbols, generator of input operators for generation of r-2 data flows of input operators, in accordance to w-(r-2) parallel data flows, and second coder for receiving parallel data flows from serial/parallel converter, which were not received at first coder and (r-2) data flows from input operators, block encoding of received data flows and output of N/2 second code symbols, while r-2 data flows of input operators provide for complementarity of N code symbols.

EFFECT: higher efficiency, higher reliability.

6 cl, 22 dwg

 

Background of the invention

1. The scope of the invention

The present invention relates generally to a device and method of transmission/reception using a block coding in a mobile communication system OMCR (orthogonal multiplexing frequency division) and, in particular, to a device and method for transmission/reception, ensure the reduction, due to the block coding, high GR/CM (peak power to average power), due to the multiple subcarriers.

2. Description of the prior art

In General, OMCR is a diagram of a two-dimensional multiplexing MBP (multiplexing time division) and CDM (multiplexing frequency division). Symbol OMCR is transmitted using sub-carriers forming the sub-channel.

Allowing spectrum of each subcarrier to overlap with orthogonality, OMCR increases the overall spectral efficiency. Because OBPF (inverse fast Fourier transform) and FFT (fast Fourier transform) provide modulation and demodulation OMCR, it is possible to provide an efficient digital implementation of the modulator and demodulator. In addition, because of its resistance to frequency-selective fading and narrowband interference, OMCR effective for high-speed data transfer for modern European systems digital prophetic the Oia and communications systems large based on standards such as IEEE 802.11a, IEEE 802.16, and IEEE 802.20.

Because the communication system OMCR transmits data using multiple carriers, the amplitude of the final signal OMCR equal to the sum of the amplitudes of the subcarriers. Therefore, if all subcarriers have the same phase, obtained very high GR/CM.

At very high GR/CM power out of the range of linear operation mode, and, in a conventional communication system OMCR, the signal is distorted as a result of processing power. Therefore, the transmitted signal OMCR has no permanent changes in the amplitude due to the phase difference between subcarriers. In addition, a departure from the operating point of maximum power available from the amplifier increases, thereby reducing the efficiency of the amplifier and increasing the power consumption. Signal with high GR/CM reduces the efficiency of the linear amplifier and moves the operating point of the nonlinear amplifier in a nonlinear region. As a result, the PM/CM brings both in-band distortion and out-of-band re-growth spectrum.

Have been proposed numerous ways to reduce the PM/CM. One of them consists in using the input device, distortion, non-linear and inverse functional characteristics of the power amplifier to be linearized in order to avoid signal distortion. In addition, Nelly is many the amplifier can be made to work in the linear region by care from its operating point. However, these methods have drawbacks: the complexity of the circuit in the high frequency range, low efficiency and high cost.

The invention

Thus, the present invention is to provide a device and method of block coding to reduce the PM/CM with the use of additional sequences in the mobile communication system OMCR.

Another objective of the present invention is to provide a device and method to improve encoding speed limit PM/CM, due to the multiple subcarriers specified level (3 dB), so as to increase spectral efficiency in mobile communication system OMCR.

The aforesaid problems are solved by a device and a method of reducing the PM/CM.

According to one aspect of the present invention, a method of reducing the PM/CM of the signal transmitted by the aggregate (N=2r) subcarriers on the sending unit, containing a series-parallel Converter for converting serial data into parallel data of k1, k2, ..., kr+2and set (t) encoders for block encoding parallel data k1, k2, ..., kr+2in the mobile communication system OMCR, accept, fully or partially, parallel data k1, k2, ..., kr+2and generate at least one bi the operator k r+3, ..., k2rthat provides additionality block-coded symbols. Parallel data k1, k2, ..., kr+2and at least one bit-operator kr+3, ..., k2revenly (=2r/t) are distributed between coders, and distributed data coded by the coders.

According to another aspect of the present invention, a device for reducing PM/CM of the signal transmitted by the aggregate (N=2r) subcarriers on the sending unit, containing a series-parallel Converter for converting serial data into parallel data of k1, k2, ..., kr+2in the mobile communication system OMCR, generator operators shall, wholly or partially, parallel data k1, k2, ..., kr+2and generates at least one bit-operator kr+3, ..., k2rthat provides additionality block-coded symbols, and each of the set of encoders takes equal part (=2r/t) parallel data k1, k2, ..., kr+2and at least one bit-operator kr+3, ..., k2rand performs block encoding received data.

Brief description of drawings

The above and other objectives, features and advantages of the present invention made it clear from the following detailed description of the Oia, presented in conjunction with the accompanying drawings, in which:

figure 1 - block diagram of a transmitter in a mobile communication system OMCR using block coding according to a variant implementation of the present invention;

figure 2 - block diagram of the receiver in the mobile communication system OMCR using block coding according to a variant implementation of the present invention;

figure 3 - example of waveforms of the signal OMCR as a function of time in a conventional mobile communication system OMCR using block coding;

figure 4 is an example of waveforms of the signal OMCR as a function of time in the mobile communication system OMCR using block coding according to a variant implementation of the present invention;

figure 5 is an example of the trajectories of a set of signals OMCR in the traditional system of mobile communication OMCR using block coding;

6 is an example of the trajectories of a set of signals OMCR in the mobile communication system OMCR using block coding according to a variant implementation of the present invention;

7 is another example of waveforms of the signal OMCR as a function of time in a conventional mobile communication system OMCR using block coding;

Fig is another example of waveforms of the signal OMCR as a function of time in the mobile communication system OMCR using block coding, with the according to a variant of implementation of the present invention;

figure 9 is another example of the trajectories of a set of signals OMCR in the traditional system of mobile communication OMCR using block coding;

figure 10 is another example of the trajectories of a set of signals OMCR in the mobile communication system OMCR using block coding according to a variant implementation of the present invention;

11 is a graph of the maximum coding rate, the number of subcarriers according to a variant implementation of the present invention;

Fig third example of waveforms of the signal OMCR as a function of time in a conventional mobile communication system OMCR using block coding;

Fig third example of waveforms of the signal OMCR as a function of time in the mobile communication system OMCR using block coding according to a variant implementation of the present invention;

Fig third example of the trajectories of a set of signals OMCR in the traditional system of mobile communication OMCR using block coding;

Fig third example of the trajectories of a set of signals OMCR in the mobile communication system OMCR using block coding according to a variant implementation of the present invention;

Fig - DIR (complementary cumulative distribution function (CCDF) block-encoded signal OMCR for N=8, according to a variant implementation of this is part II of the invention;

Fig is a block diagram of a transmitter that uses block coding according to the present invention;

Fig is a block diagram of a receiver using block coding according to the present invention;

figa-19D - examples of waveforms of the signal OMCR as functions of time when applied block coding according to a variant implementation of the present invention.

The preferred implementation of the present invention will be described here with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail so as not to obscure the invention insignificant details.

The present invention provides a new method of block coding to reduce the PM/CM in the mobile communication system OMCR. When traditional block coding for transmission to select a code word with low GR/CM of all code words. Extensive research shows that the majority of code words with low GR/CM are additional sequences Naked. Based on this idea of the extra sequence is simply formed from data using the G-matrix and b vector. Converting data to a secondary sequence Naked restricted GR/CM to 3 dB, which ensures a uniform error correction. This method blocing the coding adopted in the European system of Magic Wand.

The transfer of a data word length of w on encoding speedis 2w-1code, and this means that the actually transmitted less information words, the code words. Thus, by reducing the coding rate with the length of the information word, the spectral efficiency is reduced.

With a large number of subcarriers to maintain the speed of coding, you can use a combination of block coders, with PM/CM increases to 6 dB or higher.

Method for reduction of PM/CM according to the present invention provides a new block coding using two coders, with PM/CM is limited to 3 dB and provides the speed of a block encodingi.e. twice the current rate block coding. However, the proposed method preserves the ability of error correction inherent in the traditional block encoding.

Before proceeding to the description of a variant of implementation of the present invention, we emphasize that the use of aggregate coders increases the PM/CM and reduces the possibility of error correction.

The complex character of the modulating signal OMCR is expressed in the form

where Xn- complex data symbol, N is the number under ECUSA and T s- period of the symbol OMCR. PM/CM is defined as

where Rpeakand Rcfpeak power and average power, respectively. They are defined as follows:

Therefore, theoretical maximum of the PM/CM is equal to

The signal that are transmitted over multiple subcarriers, with additional sequences, has the PM/CM, less than or equal to 3 dB, due to the following additional properties of sequences.

Additional sequences are also additional spectrum capacity. For example, power spectra contraray pair ANand BNrepresentandThen the maximum powerdefined as

where F{} is the Fourier transform,- aperiodic correlation function for XN=[x0x1, ..., xN-1] I δn- Delta-Dirac function.

Aperiodic autocorrelation function is defined as

where * denotes complex conjugation. The Dirac function is defined as

sledovatelno,

One way of reducing the PM/CM with maintaining the coding rate in the case of a large number of subcarriers is to use the m coders (EN/mN - number of subcarriers and m is the number of coders). For example, when two encoder used for the communication system OMCR with N=8, the bit rate of each encoderFor N=2x4=8 maximum PM/CM is expressed in the form

In General, N=m×2w-1. When,

where m is the number of coders.

As described above, the use of aggregate coders increases the PM/CM and reduces the ability of error correction.

However, the present invention allows to reduce the PM/CM with 6 dB, calculated according to EQ.(11), up to 3 dB, while maintaining the ability of error correction, when the communication system OMCR using N subcarriers, instead of one encoder (EN) are two encoder (EN/2). For characters Dfmn (binary phase manipulation) R (=w/N) increases withtoin comparison with traditional block encoding.

1. N=8, Dfmn

1.1 Transmitter using the proposed block encoding.

Figure 1 shows the block diagram of the transmitter using Dfmn for N=8, under option about what westline of the present invention.

According to figure 1, the display unit 110 modulates the input data, and series-parallel (/PA) Converter 112 converts the modulated serial data in five parallel data streams k1, k2, k3, k4, k5and it displays some of them, k1, k2, k3at first encoder 116, and the other, k4, k5on the second encoder 118. Each of the encoders 116 and 118 performs block encoding input data with R≈3/4. In other words, the first and second encoders 116 and 118 represent the encoders E4that output 4 (N/2) coded bits at the input 3 data bits. To provide an additional sequence, where the data X1, X2, X3, X4, X5,X6, X7, X8fed to the input of block 122 OBPF, one data element of the k6at the input of the second encoder 118 is considered to be the operator, and its value is determined in accordance with k1...k5.

1.2 setting the pointer in the proposed block encoding.

For Dfmn with N=4 log k1, k2, k3and the output X1, X2, X3, X4the first encoder relate to each other, as shown in Table 1.

(Table 1)
InputOutput Index
k1, k2, k3X1, X2, X3, X4
-1 -1 -1-1 -1 -1 1a
-1 -1 1-1 -1 1 -1b
-1 1 -1-1 1 -1 -1B
-1 1 1-1 1 1 1-A
1 -1 -11 -1 -1 -1A
1 -1 11 -1 1 1-B
1 1 -11 1 -1 1-b
1 1 11 1 1 -1-a

Due to the properties of the additional sequences for code words with low PM/cm, the modulation of handling the sign, modulation of handling the order and M-ary modulation have low GR/CM.

The signs in Table 1 indicate this relationship. If there are two independent basic pointers a and b "is-a" and "b" indicate the version with the opposite sign, and the "a" and "b" refer to versions with reverse order. The output signals represent an additional sequence of length 4 with PM/CM 3 dB.

For Dfmn, if N=4, there are two basic pointer a and b, and if N=8, there are four basic index a, b, c, d. For N=8 there are only 256 (MN=28) code words, and 64 of them (=26have the PM/CM, less than or equal to 3 dB. In T the blitz 2 presents 32 (=2 5additional sequence chosen from the 64 code words with PM/CM, less than or equal to 3 dB.

(Table 2)
X1X2X3X4X5X6X7X8IndexX1X2X3X4X5X6X7X8Index
-1 -1 -1 1 -1 -1 1 -1a, b1 -1 -1 -1 -1 -1 1 -1A, b
-1 -1 -1 1 -1 1 -1 -1a, B1 -1 -1 -1 -1 1 -1 -1A, B
-1 -1 -1 1 1 -1 1 1a, -B1 -1 -1 -1 1 -1 1 1A, -B
-1 -1 -1 1 1 1 -1 1a, -b1 -1 -1 -1 1 1 -1 1A, -b
-1 -1 1 -1 -1 -1 -1 1b, a1 -1 1 1 -1 -1 -1 1-B, a
-1 -1 1 -1 -1 1 1 1b, -A1 -1 1 1 -1 1 1 1-B, -A
-1 -1 1 -1 1 -1 -1 -1b, A1 -1 1 1 1 -1 -1 -1-B, A
-1 -1 1 -1 1 1 1 -1b, -a1 -1 1 1 1 1 1 -1-B, -a
-1 1 -1 -1 -1 -1 -1 1B, a1 1 -1 1 -1 -1 -1 1-b, a
-1 1 -1 -1 -1 1 1 1B, -A1 1 -1 1 -1 1 1 1-b, -A
-1 1 -1 -1 1 -1 -1 -1B, A1 1 -1 1 1 -1 -1 -1-b, A
-1 1 -1 -1 1 1 1 -1B, -a1 1 -1 1 1 1 1 -1-b, -a
-1 1 1 1 -1 -1 1 -1-A, b1 1 1 -1 -1 -1 1 -1-a, b
-1 1 1 1 -1 1 -1 -1-A,B1 1 1 -1 -1 1 -1 -1-a, B
-1 1 1 1 1 -1 1 1-A, -B1 1 1 -1 1 -1 1 1-a, -B
-1 1 1 1 1 1 -1 1-A, -b1 1 1 -1 1 1 -1 1-a, -b

According to the present invention, in order to limit the PM/CM is 3 dB or less with the use of additional sequences that are not used in traditional block coding two coders, the outputs of the encoders are divided into 4 (=N/2), and both outputs are set in the form of one of the above additional sequences defined by respective pointers. This assumes that all additional sequence with PM/CM, less than or equal to 3 dB for N=8 can be formed using additional sequences for N=4. Thus, when N=8, two encoder E4use instead of one of the encoder E8for which there are 32 additional sequences listed in Table 2, compared with 16 additional p is sledovatelnot for traditional block coding. Therefore, the encoding speed is increased.

The use of two encoders E4increases the encoding speed directly from 4/8 to 6/7, but the resulting generation of code words other than those listed in Table 2, increases the PM/CM, more than 3 dB. Therefore, the values at the output of the encoders comprise additional sequence due to the control inputs of the encoders in accordance with the present invention.

In the present invention, for Dfmn and N=8, the encoding speed is equal to 5/8, which code word input unit 122 OBPF limited X1, X2, X3, X4, X5,X6, X7, X8in Table 2, and, thus, the PM/CM is limited to 3 dB or less.

For Dfmn and N=8 values of k1, k2, k3, k4, k5below in Table 3, the inputs of the two encoders E4112 and 116, form an additional sequence with PM/CM 3 dB at the input unit 112 OBPF.

The present invention provides encoding speed for 5/8 Dfmn and N=8, resulting in a code word input unit 122 OBPF represent X1, X2, X3, X4, X5,X6, X7, X8in Table 2, and, thus, the PM/CM is limited to the value of 3 dB or less.

The input sequence of k1, k2, k3, k4k 5coders E4116 and 118, are shown in Table 3, provide the complement of the outputs of the encoder. Thus, Table 3 lists the input sequence encoder, which provide PM/CM, equal to 3 dB for N=8.

(Table 3)
k1k2k3k4k5k6Indexk1k2k3k4k5k6Index
-1 -1 -1 -1 -1 1a, b1 -1 -1 -1 -1 1A, b
-1 -1 -1 -1 1 -1a, B1 -1 -1 -1 1 -1A, B
-1 -1 -1 1 -1 1a, -B1 -1 -1 1 -1 1A, -B
-1 -1 -1 1 1 -1a, -b1 -1 -1 1 1 -1A, -b
-1 -1 1 -1 -1 -1b, a1 -1 1 -1 -1 -1-B, a
-1 -1 1 -1 1 1b, -A1 -1 1 -1 1 1-B, -A
-1 -1 1 1 -1 -1b, A1 -1 1 1 -1 -1-B, A
-1 -1 1 1 1 1b, -a1 -1 1 1 1 1-B, -a
-1 1 -1 -1 -1 -1B, a1 1 -1 -1 -1 -1-b, a
-1 1 -1 -1 1 1B, -A1 1 -1 -1 1 1 -b, -A
-1 1 -1 1 -1 -1B, A1 1 -1 1 -1 -1-b, A
-1 1 -1 1 1 1B, -a1 1 -1 1 1 1-b, -a
-1 1 1 -1 -1 1-A, b1 1 1 -1 -1 1-a, b
-1 1 1 -1 1 -1-A, B1 1 1 -1 1 -1-a, B
-1 1 1 1 -1 1-A, -B1 1 1 1 -1 1-a, -B
-1 1 1 1 1 -1-A, -b1 1 1 1 1 -1-a, -b

The value of the operator k6selects the generator 120 operators in accordance with the input data of k1... k4based on the analysis of the correlation between the input sequences.

The operator k6is calculated according to

where • denotes the multiplication.

In the PM/CM is limited to 3 dB and 6 dB, with all the additional sequences, and encoding speed is 5/8, i.e. twice higher than 5/16 in traditional block coding using a single encoder.

The output signal of block 122 OBPF processed in parallel-serial Converter 124.

Figure 3 shows an example of waveforms of the signal OMCR as a function of time for N=8 in the traditional system of mobile communication OMCR, ispolzuyuschei encoding, as figure 4 shows an example of waveforms of the signal OMCR as a function of time for N=8 in the mobile communication system OMCR using block coding according to a variant implementation of the present invention. Comparing figure 3 and 4, you may notice that figure 3 waveforms have higher peaks as a function of time, than 4, and block coding, responsive to the invention, using two coders limits the peak value.

1.3 Receiver using the proposed block encoding.

Figure 2 shows a block diagram of a receiver using the proposed block coding. According to figure 2, the noisy received data transmitted on the channel, is fed to the input of the two decoders after demodulation FFT. The decoders use the hard decision for the correction of errors caused by noise in the data.

According to figure 2, the y signal is received and converted to parallel data to serial-to-parallel Converter 210. Each of the decoders 214 and 216 subtracts the b-vector bN/24 (=N/2) data received from unit 212 FFT, and corrects errors in data using matrix parity. Error correction is done by finding the pattern of errors on the basis of the syndrome and deletion of template errors from the input data. The syndrome is produced by multiplying the received data is transposed version of the matrix H. In the absence of errors, the syndrome is equal to 0. On the contrary, if there are errors, the syndrome contains at least one 1. The matrix H is the matrix parity, satisfies the relation G•HT=0 (zero matrix). The decoded data output by the decoders 214 and 216 contain the information data and the parity data. The parity data represent at least one bit-operator inserted by the transmitter. Block 218 delete operators removes at least one bit-the operator of the decoded data and outputs only the remaining data k1... k5. Parallel-serial (PA/On) Converter 220 converts the information data k1... k5in serial data. Block 222 removing the display restores the original data from the serial data.

Figure 5 shows an example of trajectories of a set of signals OMCR for N=8 in the traditional system of mobile communication OMCR using block coding, and figure 6 shows an example of trajectories of a set of signals OMCR in the mobile communication system OMCR using block coding according to a variant implementation of the present invention. From figure 5 and 6 shows that when the block coding, responsive to the invention, the signals OMCR concentrate in a particular area. According to the present invention, since the support is foreseen minimum Hamming distance, the ability of error correction is stored. In addition, the use of two decoders 214 and 216, using the encoding speed 1/2, reduces the size of the receiver and, thus, facilitates decoding.

2. Typical generation operators for Dfmn.

For Dfmn and N=16 PM/CM is limited to 3 dB, which increases the encoding speed using two encoders E8the above-described manner. Encoding speed is equal to 4/8and, thus, to the inputs of two coders do 8 (=4 * 2) data streams. For Dfmn and N=16 the total number of MNavailable code words is 216and 29code words have the PM/CM, less than or equal to 3 dB. In this case, 26of the 29code words are additional sequences, and the maximum speed of the block coding using these additional sequences are equal 6/16. When traditional block coding is used only half of the additional sequences, that is, 25. If there are 26additional sequences with PM/CM, less than or equal to 3 dB, k1... k6are informational data, and k7and k8operators are defined as

Therefore, the encoding speed is equal 6/16, unlike traditional speed is tiravanija 6/32.

7 shows a waveform of the signal OMCR as a function of time in a conventional mobile communication system OMCR using block coding, and Fig shows the waveform of the signal OMCR for N=16 as a function of time in the mobile communication system OMCR using block coding according to a variant implementation of the present invention. 7 waveform signal as a function of time have higher peaks than those obtained when the block coding using two encoders shown in Fig.

Figure 9 shows the trajectory of a set of signals OMCR for N=16 in a conventional mobile communication system OMCR using block coding, and figure 10 shows the trajectory of a set of signals OMCR in the mobile communication system OMCR for N=16, using block coding according to a variant implementation of the present invention. From figures 9 and 10 you can see that the signals are concentrated in a particular area, when using block coding that meets the present invention.

Even if the number N of subcarriers increases, the block coding can be performed according to the extension of subcarriers provided by the present invention. Thus, the formula generator operators for Dfmn can be generalized to the case of N (=2rin the form

where r is NAT the General number, greater than 2.

In this case, the number of operators is equal to r-2.

On Fig and 18 shows the block diagram of transmitter and receiver using block coding for Dfmn and N according to EQ.(14).

According pig, block 1710 display modulates data to be transmitted. Converter 1712/PA converts w-(r-2) displayed data, k1... kw-(r-2)in the parallel data. Parallel data k1... kw-(r-2)fully or partially fed to the input of generator 1714 operators. Generator 1714 operators generates at least one bit-operator kw-(r-3)... kwaccording to EQ.(14). Bit-operator is used to specify the parity data for data that is output from the inverter 1712/PA. The number of bits of operators is equal to r-2 for N=2r. Data parity kw-(r-3)... kwand information k1... kw-(r-2)arrive at a set of encoders, in this case, the two encoder 1716 and 1718. Each of the two coders 1716 and 1718 accepts equal to half of the data. Thus, the first encoder 1716 receives information k1... kw/2and the second encoder 1718 accepts other information kw/2+1... kw-(r-2)and the parity data kw-(r-3)... kw. Coders 1716 and 1718 output the coded data X1... XNby block coding. In particular, the first encoder 1716 displays the 1... XN/2in accordance with the input data of k1... kw/2and the second encoder 1718 displays XN/2+1... XNin accordance with the input data of kw/2+1... kw-(r-2)and kw-(r-3)... kw. Block 1720 OBPF modulates mode OMCR N data received from the first and second encoders 1716 and 1718, and the Converter 1722 PA/converts the modulated symbols OMCR into serial data and transmits it over the subcarriers.

According TIG, inverter 1810/PA converts the passed input signal in parallel modulated symbols x1... xN. Block 1812 FFT performs a fast Fourier transform on the modulated symbols, giving block-coded data X1... XN. Data X1... XNevenly distributed between the inputs of the set of decoders, in this case two decoders 1814 and 1816. Thus, the first decoder 1814 receives data X1... XN/2and the second decoder 1816 receives data XN/2+1... XN. Coders 1814 and 1816 output data k1... kw/2and kw/2+1... kwby decoding the input data with a hard decision. At the same time decoders 1814 and 1816 perform error correction. The parity data represent at least one bit-operator, inserted on the transmitter. Block 1818 delete operators identifies at least one bit-operator among the decoded data, removes the bits of the operators kw-(r-2)+1... kwand displays only information k1... kw-(r-2). Converter 1820 PA/converts the data into serial data. Block 1822 removing the display restores the original data from the serial data.

3. Block coding for Cfmn and N=8.

Method of block coding that meets the present invention is applicable to the modulation scheme of the M-primary FMN, and Dfmn. For Cpmn (quadrature phase manipulation) and N=8 available 48code words. 45code words have the PM/CM, less than or equal to 3 dB, and encoding speed for these 45code words is equal to 5/8, which is lower than the coding rate 6/8 for Dfmn and N=8. Among the 45code words has a 44.5additional sequences. Thus, the resulting encoding speed is equal to 4.5/8. This implies that the number of code words with PM/CM, less than or equal to 3 dB for PM/CM for Cfmn less than Dfmn. Figure 11 shows the dependence of the maximum coding rate, the number of subcarriers. Of the 11 it follows that the loss of the coding rate is smaller when the PM/CM is limited to 3 dB and Cfmn is on speed to the financing, less than Dfmn or FMN. As for the real implementation in the European system of Magic Wand made of block coding with additional sequences and FMN.

In Cfmn character is formed in the form of ks=kbo+jkbe("o" denotes even, and "e" indicates odd), where kbdenotes bits, and ksindicates the symbol. When the coding rate 4.5/8 according to the proposed method kb1... kb8represent data bits, and kb10... kb12are parity bits. ks5(=kb9+jkb10) is formed using the ks1... ks4and bits of the kb9through

and ks6defined as

where mod(x, M) denotes the value of x modulo M In the encoding speed is equal to 4.5/8.

On Fig shows the waveform of the signal OMCR for Cfmn and N=8 as a function of time in a conventional mobile communication system OMCR using block coding, and Fig shows the waveform of the signal OMCR for Cfmn and N=8 as a function of time in the mobile communication system OMCR using block coding according to a variant implementation of the present invention. Note that the waveforms shown in Fig have higher peaks than shown in Fig, PM/CM which is were restricted due to the block encoding, responsive to the invention, using two coders.

On figa-19D shows the waveform of the signal OMCR for Cfmn as a function of time for N=32, 64, 128 and 256, respectively, in the mobile communication system OMCR using block encoding.

On Fig shows the trajectory of a set of signals OMCR for Cfmn and N=8 in the traditional system of mobile communication OMCR using block coding, and Fig shows the trajectory of a set of signals OMCR for Cfmn and N=8 in the mobile communication system OMCR using block coding according to a variant implementation of the present invention. According to the drawings, the signals OMCR concentrate in a particular area, when block coding, responsive to the invention, applied to Cfmn.

On Fig shown DIR (complementary cumulative distribution function (CCDF) block-encoded signal OMCR for N=8. According pig, because the PM/CM is limited to 3 dB due to the block coding with the use of additional sequences, the probability that the PM/CM will exceed 3 dB, is equal to zero.

As described above, the block coding with additional sequences limits the PM/CM is 3 dB or less at the same time maintaining the ability of error correction, thereby ensuring that the coding efficiency. Although this is an advantage, when the number of subcarriers encoding speed is reduced. On the other hand, the present invention provides a new circuit block coding with increased spectral efficiency for reduction of PM/CM in the case of a large number of subcarriers. Thus, instead of one encoder ENthere are two encoder EN/2and part of their input signals are parity information, which allows to reduce the PM/CM with 6 dB to 3 dB, and to maintain a minimum Hamming distance. Therefore, retained the ability of error correction. In addition, the transition from block ENblock EN/2facilitates decoding. Encoding speed increases fromtothat leads to increased spectral efficiency by 3 dB compared to the traditional method of reducing the PM/CM by block coding. It is noteworthy that the present invention is applicable regardless of the number of subcarriers and the modulation M-primary FMN.

Although the present invention has been shown and described with reference to certain preferred variants of its implementation, the experts in this field can offer various changes in form and detail, without going beyond the nature and scope of the invention defined in pilage is OI the claims.

1. Device for reducing peak power to average power (PM/CM) of the signal transmitted by N(=2r) subcarriers on the sending unit containing encoders for block coding w input data, where r is a natural number greater than 2, and o N code symbols in a mobile communication system in the mode orthogonal multiplexing frequency division (OMCR), containing a series-parallel (/PA) Converter for converting a data stream in w-(r-2) parallel data streams, where w is the length of a data word, the first encoder to receive w/2 parallel data streams from w-(r-2) parallel data flows sequentially from-parallel Converter block coding w/2 parallel data streams and output N/2 first code, the generator input operators to generate (r-2) data streams input operators in accordance with w-(r-2) parallel data streams, and a second encoder for receiving parallel data streams from the serial-to-parallel Converter is not received by the first encoder and (r-2) streams data input operators, block encoding the received data streams and output N/2 second code symbols, and (r-2) threads data input operators provide additional N code symbols.

2. The device according to claim 1, in which the ri using Dfmn (binary phase manipulation) on the sending unit, the generator input operators generates (r-2) data streams input operators according to the following equation, where k denotes the data stream that is output from the inverter/PA:

k2r=-k2•kr•kr+2

k2r-i=k1•kr-i•kr+1, i=1,..., (r-3),

where k2rbit operator.

3. The device according to claim 1, in which when using Cpmn (quadrature phase manipulation) on the sending unit, the generator input operators generates (r-2) data streams input operators according to the following equation, where k denotes the data stream that is output from the inverter/PA:

kb10=kb1•kb2•kb3•kb4•kb7•kb8•kb9

ks6=mod(mod(ks2+1, 2)×2+ks2+ks3+ks4, 4)

where mod(x, M) denotes the value of x modulo M;

kbbit;

kscharacter.

4. A method of reducing peak power to average power (PM/CM) of the signal transmitted by N (=2r) subcarriers on the sending unit containing encoders for block coding w input data, where r is a natural number greater than 2, and o N code symbols, in the mobile communication mode orthogonal multiplexing frequency division (OMCR)containing phases in which

(1) transform the data flow in w-(r-2) parallel data streams, where w is the length in ormational words,

(2) perform block coding w/2 parallel data streams from w-(r-2) parallel data streams and output N/2 first code,

(3) generate (r-2) streams data input operators, in accordance with w-(r-2) parallel data streams, and

(4) perform block coding parallel data streams that are not subjected to block coding, and (r-2) data streams input operators and output N/2 second code symbols, and (r-2) data streams input operators provide additionality N code symbols.

5. The method according to claim 4, in which when using Dfmn (binary phase manipulation) on the sending device, (r-2) data streams input operators are determined according to the following equations, where k denotes the transformed data stream:

k2r=-k2•kr•kr+2

k2r-i=k1•kr-i•kr+1, i=1,..., (r-3),

where k2rbit operator.

6. The method according to claim 4, in which when using Cpmn (quadrature phase manipulation) on the sending device, (r-2) data streams input operators generated according to the following equations, where k denotes the transformed data stream:

kb10=kb1•kb2•kb3•kb4•kb7•kb8•kb9

ks6=mod(mod(ks2+1, 2)×2+ks2+ks3+ks4, 4)

where mod(x, M) denotes the value of x modulo M,

kbbit,

kscharacter.

7. A method of reducing peak power to average power (PM/CM) of the signal transmitted by the aggregate (N=2r) subcarriers on the sending unit, containing a series-parallel Converter for converting serial data into parallel data streams k1, k2,..., kr+2and a set of encoders for block encoding parallel data streams k1, k2,..., kr+2in the mobile communication system in the mode orthogonal multiplexing frequency division (OMCR), where r is a natural number greater than 2, comprising stages, which take at least one of the parallel data streams and generate at least one bit-operator kr+3,..., k2rthat provides additionality block-coded symbols, and distributing parallel data streams and at least one bit-operator evenly between coders and subjected to distributed data block encoding, where t is the number of coders.

8. The method according to claim 7, in which the number of bits of the operators is defined as r-2 in accordance with the number of subcarriers.

9. The way p is 7, which when using Dfmn (binary phase manipulation) on the sending unit (r-2) data streams input operators are determined according to the following equations, where k denotes the transformed data stream:

k2r=-k2•kr•kr+2

k2r-i=k1•kr-i•kr+1, i=1,..., (r-3),

where k2rbit operator.

10. The method according to claim 7, in which when using Cpmn (quadrature phase manipulation) on the sending device, (r-2) data streams input operators are determined according to the following equations, where k denotes the transformed data stream:

kb10=kb1•kb2•kb3•kb4•kb7•kb8•kb9

ks6=mod(mod(ks2+1, 2)×2+ks2+ks3+ks4, 4)

where mod(x, M) denotes the value of x modulo M;

kbbit;

kscharacter.

11. Device for reducing peak power to average power (PM/CM) of the signal transmitted by the aggregate (N=2r) subcarriers on the sending unit, containing a series-parallel Converter for converting serial data into parallel data streams k1, k2,..., kr+2in the mobile communication system in the orthographic mule is tabletservice frequency division (OMCR), where r is a natural number greater than 2, comprising a generator operators to receive at least one of the parallel data streams and generating at least one bit-operator kr+3,..., k2rthat provides additionality block-coded symbols, and a set of encoders, each of which takes an equal number of parallel data streams and at least one bit-operator kr+3,..., k2rand performs block encoding received data.

12. The device according to claim 11, in which the number of bits of the operators is defined as r-2 in accordance with the number of subcarriers.

13. The device according to claim 11, in which when using Dfmn (binary phase manipulation) on the sending unit, the generator input of the operators determines the data streams input operators according to the following equations, where k denotes the transformed data stream:

k2r=-k2•kr•kr+2

k2r-i=k1•kr-i•kr+1, i=1,..., (r-3),

where k2rbit operator.

14. The device according to claim 11, in which when using Cpmn (quadrature phase manipulation) on the sending unit, the generator input of the operators determines the data streams input operators according to the following equations, where k denotes converted on the OK data:

kb10=kb1•kb2•kb3•kb4•kb7•kb8•kb9

ks6=mod(mod(ks2+1, 2)×2+ks2+ks3+ks4, 4)

where mod(x, M) denotes the value of x modulo M,

kbbit,

kscharacter.

15. The method of demodulating the decoded data streams k1, k2,..., k2rat the receiving device that converts a serial input signal into a parallel data streams, where r is a natural number greater than 2, performs a Fourier transform on the parallel data streams and distributes the data is subjected to Fourier transform, uniformly over the set of decoders for decoding in a mobile communication system in the mode orthogonal multiplexing frequency division (OMCR)containing phases, which identify at least one bit-operator kr+3,..., k2rof decoded data streams, removing at least one bit-the operator of the decoded data streams and restores the original data from the information data streams k1, k2,..., kr+2without at least one bit-operator.

16. The method according to item 15, in which the number of bits of the operators is defined as r-2 in accordance with the number of subcarriers used in p is reduser device.

17. Device for demodulating the decoded data streams k1, k2,..., k2rin the receiving device, containing a series-parallel Converter for converting a serial input signal into a parallel data streams, where r is a natural number greater than 2, and the block Fourier transform to perform Fourier transform on the parallel data streams in the system of mobile communication mode orthogonal multiplexing frequency division (OMCR)that contains a set of decoders, each of which takes an equal number of additional sequences subjected to Fourier transform, and decode the received additional sequence removal unit operators to identify at least one bit-operator kr+3,..., k2rfrom the decoded data stream and removing at least one bit-operator of decoded data streams, and block removal of the display to restore the original data from the information data streams k1, k2,..., kr+2without at least one bit-operator.

18. The device according to 17, in which the number of bits of the operators is defined as r-2 in accordance with the number of subcarriers used in the transmitting device.



 

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