河北工业科技2024，Vol.41Issue(2)：85-91,7.DOI:10.7535/hbgykj.2024yx02001
基于双通道接收的干扰对消性能分析
Performance analysis of interference cancellation based on dual-channel receiver
摘要
Abstract
In order to study the feasibility of interference cancellation in satellite communication ground stations to resist interference from air platforms or surrounding areas in engineering applications,an analysis of interference cancellation performance was conducted under various reception environments.Firstly,assuming that the interference difference in two channels was accurately estimated and compensated,an approximate calculation formula of theoretical performance under this method was derived.Then the Least Mean Square(LMS)adaptive filter was used to compensate the interference difference to complete the interference cancellation.Finally,the interference cancellation using LMS adaptive filter was verified by simulation experiments.The results show that the decrease of signal to noise ratio can be close to 0 dB in the theoretical performance when the included angle between satellite signal and interference is greater than 15°,while the decrease of signal to noise ratio will be significantly improved when the angle is less than 15°.In addition to the influence of the included angle,the performance of interference cancellation using LMS adaptive filter is also affected by algorithm parameters,interference power and other factors.For fixed-frequency interference,when the included angle is greater than 4° and the signal to interference ratio of main channel is less than 30 dB,the signal to noise ratio decreases less than 0.6 dB after interference cancellation,and this result is essentially unaffected by the sampling rate.The proposed approximate calculation formula of theoretical performance can provide reference for the performance evaluation of interference cancellation algorithm.The interference cancellation using LMS adaptive filter can approach the theoretical performance when the algorithm parameters are appropriately configured.关键词
无线通信技术/干扰对消/LMS自适应滤波器/再生重构/加权重构Key words
wireless communication technique/interference cancellation/LMS adaptive filter/regenerative reconstruction/weighted reconstruction分类
信息技术与安全科学引用本文复制引用
范霄鹤,王赛宇,潘申富,王杨..基于双通道接收的干扰对消性能分析[J].河北工业科技,2024,41(2):85-91,7.基金项目
中国电子科技集团公司网络通信研究院发展基金(SXX21687X051) （SXX21687X051）
