基于二相码的PD雷达解模糊及遮挡方法

doi:10.12305/j.issn.1001-506X.2023.06.10

摘要/Abstract

摘要：

为避免二相编码脉冲多普勒(pulse Doppler, PD)雷达的速度以及距离模糊, 采用高脉冲重复频率工作(high pulse repetition frequency, HPRF)模式, 并在多个脉冲间采用互相关峰值较低的二相编码信号, 在接收端对多个发射脉冲间的回波信号进行数据重排, 然后进行脉冲压缩、动目标检测, 最终得到的峰值可无模糊体现目标的速度和距离。为减小PD雷达的工作盲区, 采用了小的发射脉冲时间宽度, 即二相编码信号的码片长度; 为避免PD雷达的发射脉冲遮挡, 采用两种HPRF发射正交二相编码脉冲信号。仿真结果验证了所提方法的有效性和可行性。

关键词: 脉冲多普勒雷达, 二相编码信号, 距离速度模糊, 遮挡

Abstract:

In order to avoid velocity and range ambiguity of binary phase coded pulse Doppler (PD) radar, high pulse repetition frequency (HPRF) working mode is adopted, and the binary phase coded signals with low cross-correlation peak are used between multiple pulses. In the receiver, data rearrangement of echo signals between multiple transmitted pulses is performed, and then pulse compression and moving target detection (MTD) are used to obtain the peak value which can reflect the target speed and target distance without ambiguity. To reduce the blind working area of PD radar, small transmitting pulse time width is adopted, that is, the chip length of two-phase coded signal. To avoid the eclipsing loss of PD radar transmitted pulse, two kinds of HPRF are adopted to transmit orthogonal binary phase coded pulse signals. Simulation results verify that the proposed method is effective and feasible.

Key words: pulse Doppler (PD) radar, binary phase code, range and velocity ambiguity, range eclipse

中图分类号:

TN951

严济鸿, 张欢, 倪伟涵, 杨礼, 何子述. 基于二相码的PD雷达解模糊及遮挡方法[J]. 系统工程与电子技术, 2023, 45(6): 1667-1674.

Jihong YAN, Huan ZHANG, Weihan NI, Li YANG, Zishu HE. An unambiguity and range eclipse free method for PD radar using binary phase coded signals[J]. Systems Engineering and Electronics, 2023, 45(6): 1667-1674.

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