Multi-dimensional ambiguity function for subarray-based space-time coding radar  

作　　者：LAN Lan LIAO Guisheng XU Jingwei WANG Hanbing 

机构地区：[1]National Laboratory of Radar Signal Processing, Xidian University

出　　处：《Journal of Systems Engineering and Electronics》2019年第5期886-896,共11页系统工程与电子技术（英文版）

基　　金：supported by the National Key Research and Development Program of China(2016YFE0200400);the Key R&D Program of Shaanxi Province(2017KW-ZD-12);the Postdoctoral Science Foundation of Shaanxi Province;the Nature Science Foundation of Shaanxi Province

摘　　要：Space-time coding radar has been recently proposed and investigated.It is a radar framework which can perform transmit beamforming at the receiver.However,the range resolution decreases when the number of the transmit element increases.A subarray-based space-time coding(sub-STC)radar is explored to alleviate the range resolution reduction.For the proposed radar configuration,an identical waveform is transmitted and it introduces a small time offset in different subarrays.The multidimensional ambiguity function of sub-STC radar is defined by considering resolutions in multiple domains including the range,Doppler,angle and probing direction.Analyses on properties of the multi-dimensional ambiguity function of the sub-STC radar with regard to the spatial coverage,resolution performance and low sidelobes are also given.Results reveal that the range resolution and low sidelobes performance are improved with the proposed approach.Space-time coding radar has been recently proposed and investigated. It is a radar framework which can perform transmit beamforming at the receiver. However, the range resolution decreases when the number of the transmit element increases. A subarray-based space-time coding(sub-STC) radar is explored to alleviate the range resolution reduction. For the proposed radar configuration, an identical waveform is transmitted and it introduces a small time offset in different subarrays. The multidimensional ambiguity function of sub-STC radar is defined by considering resolutions in multiple domains including the range,Doppler, angle and probing direction. Analyses on properties of the multi-dimensional ambiguity function of the sub-STC radar with regard to the spatial coverage, resolution performance and low sidelobes are also given. Results reveal that the range resolution and low sidelobes performance are improved with the proposed approach.

关 键 词：SPACE-TIME coding RADAR MULTI-DIMENSIONAL AMBIGUITY function range resolution wide spatial coverage SUBARRAY SIDELOBE 

分 类 号：TN9[电子电信—信息与通信工程]