CN-121980974-A - PAPR waveform optimization algorithm and system for OFDM (orthogonal frequency division multiplexing) general sense integrated system without reducing PSLR (power supply line) performance

CN121980974ACN 121980974 ACN121980974 ACN 121980974ACN-121980974-A

Abstract

The application relates to a PAPR waveform optimization algorithm and a system without reducing PSLR performance of an OFDM (orthogonal frequency division multiplexing) general sense integrated system, which comprises the steps of randomly generating population individuals in a feasible domain, randomly generating population individuals in the feasible domain, evaluating the generated P primary chromosomes, and selecting a parent environment after the evaluation is completed to obtain a population And offspring populations Combining into a combined population, sorting according to PAPR to obtain the front P populations as environment-selected population And obtain the optimal chromosome And judging the minimum value of the corresponding objective function and the termination condition, terminating the optimization when the termination condition is met, obtaining the optimized reserved sub-carrier phase bit matrix, and performing the cyclic processing until the termination condition is met when the termination condition is not met. The PAPR waveform optimization algorithm and the system for the OFDM integrated system without reducing the PSLR performance can independently optimize the performance of the PAPR on the premise of keeping the PSLR performance unchanged, and can obviously improve the PAPR performance index of the integrated waveform of the through sense.

Inventors

ZHANG YU
BAI SHENWEI
Jiang chuangsheng

Assignees

星火时空(成都)科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (8)

1. The PAPR waveform optimization algorithm for the OFDM general sense integrated system without reducing PSLR performance is characterized by comprising the following steps: randomly generating population individuals in a feasible domain, wherein the using length is The phase bit of each group of individuals is used as a chromosome of each group of individuals, and the phase bit is a part of bits in reserved subcarriers; evaluation of the P primary chromosomes produced and selection of a parent environment into a subsequent population after evaluation And offspring populations Combining into a combined population, wherein the size of the combined population is 2P; Sorting according to PAPR to obtain the P populations as environment-selected populations And obtain the optimal chromosome A corresponding minimum value of the objective function; Judging a termination condition: When the termination condition is met, terminating the optimization and obtaining an optimized reserved sub-carrier phase bit matrix; When the termination condition is not met, generating a new generation population through cross operation and mutation operation, and repeating the cyclic processes of evaluation, population sequencing and termination condition judgment until the termination condition is met; Wherein, the sub-carriers are divided into reserved sub-carriers, information sub-carriers, check sub-carriers and unused sub-carriers; The reserved sub-carriers are not used for transmitting information and are used for waveform optimization, the information sub-carriers bear transmitted bit information, and the check sub-carriers are used for bearing check bits.
2. The PAPR waveform optimization algorithm of an OFDM sense integrated system of claim 1, wherein each subcarrier includes four bits, the four bits being divided into two modulo-length bits and two phase bits.
3. The PAPR waveform optimization algorithm of an OFDM sense integrated system of claim 2, wherein the modulo long bits can carry transmission information without degrading PSLR performance.
4. The PAPR waveform optimization algorithm for an OFDM sense-on-all system without degrading PSLR performance according to claim 1, wherein a plurality of bits included in a subcarrier are divided into a plurality of bit planes to be encoded respectively; each bit plane comprises a number of bits equal to the number of subcarriers involved in constructing the bit plane.
5. The PAPR waveform optimization algorithm for an OFDM sense integrated system without degrading PSLR performance according to claim 1 or 4, wherein after optimizing PAPR and PSLR of reserved sub-carriers, check bits are calculated according to the optimized reserved sub-carriers, and check sub-carriers are updated.
6. The PAPR waveform optimization algorithm for an OFDM-based ventilation integrated system without degrading PSLR performance of claim 1, wherein the interleaving operation comprises: Let father individuals be And (3) with The offspring generated by the crossover are: ; Wherein, the Here, where Refers to Row of lines Random 0,1 matrix of columns.
7. The PAPR waveform optimization algorithm without psLR performance degradation for an OFDM integrated system as recited in claim 6, wherein the mutation operation comprises randomly flipping a portion of bits over the generated population, setting the number of flipped bits to be no more than The following are provided: 。
8. a PAPR waveform optimization system for an OFDM sense-of-general integrated system that does not degrade PSLR performance, the system comprising: One or more memories for storing instructions, and One or more processors to invoke and execute the instructions from the memory to perform the method of any of claims 1 to 7.

Description

PAPR waveform optimization algorithm and system for OFDM (orthogonal frequency division multiplexing) general sense integrated system without reducing PSLR (power supply line) performance Technical Field The application relates to the technical field of data processing, in particular to a PAPR waveform optimization algorithm and a PAPR waveform optimization system for an OFDM (orthogonal frequency division multiplexing) ventilation integrated system without reducing PSLR (power supply line) performance. Background The OFDM communication integrated system is an advanced technology which is rising in recent years, integrates two functions of communication and radar, and can effectively improve the frequency spectrum efficiency, the hardware efficiency and the information processing efficiency of the system. The communication integrated system has no special radar signal, and uses the communication signal as a radiation source, so that the communication integrated system is an external radiation source radar. The external radiation source type radar does not actively emit signals, but generates echo signals by radiating the signals to the moving target through other radiation sources, and then uses the receiver to perform signal amplification, frequency mixing and analog-digital conversion operation on the echo signals so as to perform echo signal processing in a digital domain, thereby obtaining the information such as the distance, the speed and the like of the moving target. Unlike the scenario of active radar, in OFDM passive radar systems it is necessary to reconstruct the transmitted signal at the radar receiving end in order to detect echo signals by correlation processing. This is because in OFDM passive radar systems, the signal source is uncontrollable and unpredictable, requiring a separate reference configuration to reconstruct the reference signal. If there is an error in the reconstructed signal due to deep fade or signal interference, the detection performance of the echo signal is certainly deteriorated. One approach is to recreate the transmitted signal by bit-level decoding and then re-encoding the received noise signal, thus obtaining an almost perfect copy of the transmitted signal. The waveform optimization and error correction coding constraint of the PAPR and the PSLR are uniformly considered, so that the PAPR and the PSLR can be optimized, and meanwhile, the error code of the reference signal caused by deep fading or interference can be correctly recovered. However, PAPR is two contradictory performance indexes of PSLR, and further research is required on how to optimize the PAPR. Disclosure of Invention The PAPR waveform optimization algorithm and the PAPR waveform optimization system for the OFDM ventilation integrated system, which are provided by the application, have the advantages that the PAPR performance can be independently optimized on the premise that the PSLR performance is not degraded, and the ventilation integrated waveform PAPR performance index can be obviously improved. The above object of the present application is achieved by the following technical solutions: In a first aspect, the present application provides a PAPR waveform optimization algorithm for an OFDM sense-on-all system without degrading PSLR performance, including: randomly generating population individuals in a feasible domain, wherein the using length is The phase bit of each group of individuals is used as a chromosome of each group of individuals, and the phase bit is a part of bits in reserved subcarriers; evaluation of the P primary chromosomes produced and selection of a parent environment into a subsequent population after evaluation And offspring populationsCombining into a combined population, wherein the size of the combined population is 2P; Sorting according to PAPR to obtain the P populations as environment-selected populations And obtain the optimal chromosomeA corresponding minimum value of the objective function; Judging a termination condition: When the termination condition is met, terminating the optimization and obtaining an optimized reserved sub-carrier phase bit matrix; When the termination condition is not met, generating a new generation population through cross operation and mutation operation, and repeating the cyclic processes of evaluation, population sequencing and termination condition judgment until the termination condition is met; Wherein, the sub-carriers are divided into reserved sub-carriers, information sub-carriers, check sub-carriers and unused sub-carriers; The reserved sub-carriers are not used for transmitting information and are used for waveform optimization, the information sub-carriers bear transmitted bit information, and the check sub-carriers are used for bearing check bits. In a possible implementation manner of the first aspect, each subcarrier includes four bits, and the four bits are divided into two modulo-length bits and two phase bits. In a possibl