Open Access

ARTICLE

An Unambiguity and Anti-Range Eclipse Method for PD Radar Using Biphase Coded Signals

by Jihong Yan^1,2, Weihan Ni^1,*, Jianshu Zhai², Haiyang Dong¹

1 Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, 324000, China
2 School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China

* Corresponding Author: Weihan Ni. Email:

(This article belongs to the Special Issue: Models of Computation: Specification, Implementation and Challenges)

Computer Modeling in Engineering & Sciences 2023, 134(2), 1337-1351. https://doi.org/10.32604/cmes.2022.021567

Received 21 January 2022; Accepted 16 March 2022; Issue published 31 August 2022

Abstract

Target detection is an important research content in the radar field. At present, efforts are being made to optimize the precision of detection information. In this paper, we use the high pulse repetition frequency (HPRF) transmission method and orthogonal biphase coded signals in each pulse to avoid velocity ambiguity and range ambiguity of radar detection. In addition, We also apply Walsh matrix and genetic algorithm (GA) to generate satisfying orthogonal biphase coded signals with low auto-correlation sidelobe peak and cross-correlation peak, which make the results more accurate. In a radar receiver, data rearrangement of echo signals is performed, and then pulse compression and moving target detection (MTD) are utilized to get the final velocity and range information of a target without velocity ambiguity and range ambiguity. Besides, a small transmitting pulse time width is adopted to reduce the working blind area, and two different high pulse repetition frequencies (HPRFs) are adopted to solve the problem of range eclipse. Simulation results finally prove the effectiveness and feasibility of the proposed method.

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Keywords

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