窄带干扰环境高动态双二进制偏移载波信号捕获

北京邮电大学学报 ›› 2023, Vol. 46 ›› Issue (1): 50-56.

窄带干扰环境高动态双二进制偏移载波信号捕获

张天骐,方竹,王雪怡,汪锐

重庆邮电大学

收稿日期:2022-01-14 修回日期:2022-03-20 出版日期:2023-02-28 发布日期:2023-02-22
通讯作者: 方竹 E-mail:792196473@qq.com
基金资助:
重庆市自然科学基金项目

High Dynamic Dual Binary Offset Carrier Signal Acquisition in Narrowband Interference Environment

Chongqing University of Posts and Telecommunications

Received:2022-01-14 Revised:2022-03-20 Online:2023-02-28 Published:2023-02-22

摘要/Abstract

摘要： 针对窄带干扰环境下高动态双二进制偏移载波信号捕获困难的问题,提出奇异值分解结合最小描述长度准则以及离散多项式相位变换,部分匹配滤波器和分数阶傅里叶变换加频谱校正的捕获算法。首先,利用奇异值分解将含窄带干扰的信号分为信号子空间和干扰子空间,利用最小描述长度准则确定目标信号和干扰信号的界限,完成干扰抑制;然后,使用定阶算法确定信号动态阶数并完成降阶; 最后,完成仅含一阶多普勒变化率信号的捕获。仿真结果表明,所提算法在较好地保留原始信号特征的同时自适应完成干扰精确抑制,且性能稳定。此外,所提捕获算法在相同条件下与未校正相比,捕获概率有约 2 dB 的增益。

关键词: 窄带干扰, 奇异值分解, 最小描述长度准则, 分数阶傅里叶变换 , 比值校正

Abstract: To solve the difficulty in capturing highly dynamic double-binary offset carrier signals in narrowband interference environment, a capture algorithm combining singular value decomposition, the minimum description length criterion, discrete polynomial phase transformation, partial matching filter and fractional Fourier transform plus spectrum correction is proposed. First, the singular value decomposition is used to divide the signal containing narrowband interference into signal subspace and interference subspace, and the minimum description length criterion is used to determine the boundary between target signal and interference signal, and the interference suppression is adaptively completed. Then, the order algorithm is used to determine the dynamic order of the signal to complete the downgrading. Finally the capture of the signal containing only the first-order Doppler rate of change is completed. The simulation results show that the proposed algorithm can easily complete the precise suppression of interference while retaining the original signal characteristics, and the performance is stable. In addition, the proposed capture algorithm improves the capture probability by about 2 dB gain compared with uncorrected under the same conditions

Key words: narrowband interference , singular value decomposition , minimum description length criterion, fractional Fourier transform , , ratio correct

中图分类号:

TN967.1

张天骐方竹王雪怡汪锐. 窄带干扰环境高动态双二进制偏移载波信号捕获[J]. 北京邮电大学学报, 2023, 46(1): 50-56.

ZHANG Tianqi, FANG Zhu, WANG Xueyi, WANG Rui. High Dynamic Dual Binary Offset Carrier Signal Acquisition in Narrowband Interference Environment[J]. Journal of Beijing University of Posts and Telecommunications, 2023, 46(1): 50-56.

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