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改进干扰抵消算法在超低频通信中的应用
Application of improved interference cancellation algorithm in SLF communication
张宁1, 蒋宇中1, 李明铭2
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作者单位:1. 海军工程大学 电子工程学院, 湖北 武汉 430033;
2. 中国人民解放军91878部队 广东 湛江 524057
中文关键字:超低频通信;特征子空间投影;阻塞矩阵;天线阵列;远距离船舶通信
英文关键字:SLF communication; ESP; blocking matrix; antenna array; long-distance marine communication
中文摘要:通过分析利用超低频电磁波信号对远海船舶通信时存在的目标信号难提取的问题,提出了一种正交布设的天线阵列模型,并使用一种改进的特征子空间投影算法处理接收到的信号。提出的改进算法利用系数约束自适应阻塞矩阵的办法提取主天线上的干扰信息,并联合参考天线信号优化对干扰子空间的估计。仿真和实验结果表明,提出的算法能够有效抵消与主天线夹角较小的宽频带干扰。实验中,在夹角等于15°的情况下,信干噪比较原算法提高了10.11 dB。
英文摘要:By analyzing the problem in extracting desired signal in the long-distance marine communication by super-low frequency(SLF) electromagnetic signal, an orthogonal array model of antenna is proposed, and an improved Eigen-subspace Projection(ESP) algorithm is used to process the received signals. The proposed algorithm combines the coefficient constrained adaptive blocking matrix, which can extract the interference information on the main antenna and combines the reference antenna signal to optimize the estimation of the interference subspace. Simulation and experimental results show that the proposed algorithm can effectively cancel wideband interference with smaller angle of the main antenna. In the experiment, when the angle between interference and main antenna is 15°, the SINR is increased by 10.11 dB compared with the traditional algorithm.
2020,42(2): 155-160 收稿日期:2018-06-30
DOI:10.3404/j.issn.1672-7649.2020.02.030
分类号:TP391
作者简介:张宁(1994-),男,硕士研究生,主要研究方向为通信信号处理
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