| 摘要: |
| 本文将完全互补码(Complete Complementary Code, CCC)应用于多输入多输出(Multiple Input Multiple Output, MIMO)雷达目标探测中，针对具有非零多普勒的多目标检测问题，提出一种基于广义普洛黑-修-莫尔斯(Generalized Prouhet-Thue-Morse, GPTM)序列和二项式系数加权的信号处理方法。该方法分别在发射端和接收端进行处理，在发射端采用GPTM序列设计方法调整脉冲的发射顺序，以降低由多普勒引起的距离旁瓣；在接收端通过二项式设计(Binomial Design, BD)方法为各接收脉冲加上不同权重，扩大目标多普勒附近的清洁区。为综合上述两次处理的优势，将两次处理得到的距离多普勒谱进行逐点最小化处理，得到最终的距离多普勒谱，然后进行有序恒虚警检测。仿真结果表明，本文所提的信号处理方法具有良好的旁瓣抑制效果和多普勒分辨率，能够有效检测出非零多普勒目标。 |
| 关键词: 目标检测 完全互补码 非零多普勒 旁瓣抑制 |
| DOI：DOI:10.3969/j.issn.1672-2337.2022.04.013 |
| 分类号:TN957.51 |
| 基金项目:国家自然科学基金（No.61661032）； 中国博士后科学基金项目（No.2017M622102）； 江西省博士后科研项目（No.2017KY36）； 江西省自然科学基金（No.20161BAB212038, 20181BAB202002） |
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| Nonzero Doppler Target Detection Based on CCC Waveform |
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ZHANG Yuxin， HONG Sheng， FU Yongqiang， QU Siyu
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School of Information Engineering， Nanchang University， Nanchang 330031， China
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| Abstract: |
| In this paper, complete complementary code (CCC) is applied to multiple input multiple output (MIMO) radar target detection. Aiming at the problem of multiple targets detection with nonzero Doppler, a signal processing method based on generalized Prouhet-Thue-Morse (GPTM) sequence and binomial coefficient weighting is proposed. The method is operated in the transmitter and receiver respectively. In the transmitter, the GPTM sequence design method is used to adjust the transmitting sequence in order to reduce the range sidelobe caused by Doppler. In the receiver, binomial design (BD) method is used to multiply the received pulses with different weights to expand the clean area near the Doppler of the target. In order to combine the advantages of the above two methods, a pointwise minimization processing is performed on the range Doppler maps obtained by the two methods to get the final range Doppler map, and then the ordered statistics constant false alarm rate detection is carried out. Simulation results show that the proposed signal processing method has good sidelobe suppression effect and Doppler resolution, and can effectively detect nonzero Doppler targets. |
| Key words: target detection complete complementary code (CCC) nonzero Doppler sidelobe suppression |
