基于EPC-MIMO编码设计的解距离模糊性能分析

doi:10.12305/j.issn.1001-506X.2022.07.12

Abstract

Abstract:

In the medium and high pulse repetition frequency radar, the range ambiguity will occur if the time delay of the target's echo is larger than the transmitted pulse repetition time. To deal with this problem, the element-pulse coding (EPC) in joint transmit elements and pulses is performed in multiple-input multiple-output (MIMO) radar, where the scheme of EPC is studied. Firstly, the coding schemes based on the Fourier orthogonal basis are extended, and the general EPC scheme is proposed, where M ! kinds of coding schemes can be obtained with M transmit elements. Then, the range ambiguity resolvability of the EPC-MIMO radar is analyzed with the signal-to-ambiguous-plus-noise ratio (SANR). Finally, the weight vector optimization method corresponding to angle error is proposed, which further improves the robustness of range ambiguity resolution. Simulation examples are provided to confirm the effectiveness of the proposed method, showing that the targets can be effectively separated in different range regions with the proposed coding schemes under ideal conditions. Along the same line of reasoning, after optimizing the weight vector, the performances of range ambiguity resolution for M ! coding schemes are similar.

Key words: multiple-input multiple-output (MIMO) radar, element-pulse coding, range ambiguity, signal-to-ambiguous-plus-noise ratio (SANR)

CLC Number:

TN957.52

Jinling LIAO, Guisheng LIAO, Jingwei XU, Lan LAN. Analysis on the performance of resolving range ambiguity based on a coding scheme design for EPC-MIMO[J]. Systems Engineering and Electronics, 2022, 44(7): 2166-2174.

Figures/Tables 11

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参数	参数值	参数	参数值
发射阵元数	6	接收阵元数	6
波长/m	0.1	载频/GHz	3
PRF/kHz	20	采样频率/MHz	5
距离门大小/m	30	脉冲数	16
发射阵元间距/m	0.05	接收阵元间距/m	0.05

参数	目标1	目标2	目标3	目标4
角度/(°)	0	0	0	0
距离区号	1	2	3	4
速度/(m·s^-1)	100	100	100	100
SNR/dB	10	10	10	10
主值距离/m	1 000	1 000	1 000	1 000
总距离/m	1 000	8 500	16 000	23 500

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Analysis on the performance of resolving range ambiguity based on a coding scheme design for EPC-MIMO

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