OFDM-based high-resolution radar communication integration waveform optimization method

Abstract

The invention discloses an OFDM-based high-resolution radar communication integration waveform optimization method. The method comprises steps: a radar transmission end adopts a pulse transmission mode to obtain a signal transmitted by a radar transmission end, the signal is transmitted to a communication end and a radar receiving end respectively, information demodulation is carried out after the signal arrives at the communication end, a signal after information demodulation is obtained, pulse compression processing and communication information compensation are respectively carried out on an echo signal for the signal received by the radar receiving end, a target estimation range corresponding to a target and an echo signal after communication information compensation are obtained respectively, decorrelation processing is carried out on the echo signal, an average value for multiple time sub arrays is obtained, MUSIC algorithm is used for calculating a spectral function related to a target range and a target speed in the average value, a target range with range ambiguity and a target speed without ambiguity corresponding to the target are further obtained, range ambiguity solution processing is carried out on the target range with range ambiguity, and a real target range corresponding to the target is obtained.

Description

technical field [0001] The invention belongs to the technical field of radar signal design and communication, in particular to an OFDM-based high-resolution radar communication integration waveform optimization method, that is, a high-resolution radar communication based on Orthogonal Frequency Division Multiplexing (OFDM) An all-in-one waveform optimization method for simultaneous target range and target velocity estimation for high-resolution radar and high-data-rate communications. Background technique [0002] With the continuous development of science and technology, and the increasing military demand in the new battlefield environment, the electronic equipment on the same combat platform gradually increases, resulting in the gradual increase in the volume and energy consumption of the combat platform. The electromagnetic interference between them is gradually increasing. The integration of radar and communication is an effective way to solve the above problems, so tha...

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Problems solved by technology

已有学者研究OFDM符号在雷达中的应用,文献“TianxianZhang,Xiang-GenXia.OFDMSyntheticApertureRadarImagingWithSufficientCyclicPrefix[J].IEEETransactionsonGeoscienceandRemoteSensing,2015,53(1):394-404.”和文献“SatyabrataSen.OFDMRadarSpace-TimeAdaptiveProcessingbyExploitingSpatio-TemporalSparsity[ J]. IEEE Transactions on Signal Processing, 2013, 61(1): 118-130.", and the literature "Zhang Wei, Tang Xiyuan, Gu Hong, etc. Analysis of OFDM radar signal ambiguity function [J]. Journal of Nanjing University of Science and Technology, 2011, 35(4 ):513-518." and the literature "SatyabrataSen,AryeNehorai.Sparsity-BasedMulti-TargetTrackingUsingOFDMRadar[J].IEEETransactionsonSingnalProcessing,2011,59(4):1902-1906.", but the literature does not consider the integration of radar and communication , and only one OFDM symbol is transmitted in each pulse of the radar transmission signal. If it is directly used to realize the communication function, there will be low information transmission rate and synchronization difficulties. "ChristianSturm, WernerWiesbeck. 99(7): 1236-1259" considers the integration of radar and communication, and adopts the continuous wave transmission method with separate transceivers, and realizes the estimation of target distance and target speed by matrix point division, but using this method to obtain radar target Both range and target speed have low resolution

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