基于RDMMIMOOFDM雷达的目标参数估计方法

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Target parameter estimation method based on range-division multiplexing MIMO OFDM radar

TIAN Xuanxuan1，HU Nianping² （1.SchoolofInformationandCommuicationEngineering，GuangzhouMaritimeUniversity，Guangzhou51O725，China; 2.DepartmentofCommand，Special OperationCollege ofPLA，Guilin541o02，China）

Abstract：In the multiple-input multiple-output （MIMO）orthogonal frequency-division multiplexing （OFDM）radarsystems， equidistantsubcarierinterleaving（ESI）isusuallyapliedtoachievetheorthogonalityof transmit （Tx）signalsintefrequency domain.However，theESIsufersfromtherange-dependentangleerors.Inviewofthis，atargetparameterestimationmethod using range-division multiplexing （RDM）MIMO OFDMradar is proposed.Firstly，the signal model ofRDM MIMOOFDMradar is establishedtoobtaintheorthogonalTxwaveformsoftetransmitingterminalintherangedomain，sothattheantennaapertureof theradarreceiverisexpandedsignificantlyandtheangleresolutionisimproved.Then，abinarymasktoseparateTxwaveforms insteadofusingaband-assfilterisintroducedbetweetherange-velocityprocesingandtheangleestimation.Atthesametime， thenoisiterfereceisuppssdndheaingqualitiimproedFinallheoecessdecivesofe method areevaluatedbysimulations.Theresultsshowthat，incomparison withtheESI，theproposed methodcanremove the range-dependentangleerrosefectively，andachievehigherimagingresolutionandauracyofangleparametereiation.

Keywords：MIMO radar; OFDM;RDM; binary mask; radar imaging;angle estimation

0 引言

随着智能驾驶技术的不断发展，毫米波雷达作为汽车安全控制系统的重要传感器，其主要功能是对车辆周围目标进行距离、速度和角度测量。（剩余7035字）