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基于 RIE 的自适应窄带干扰抑制算法
引用本文:付卫红,宋长汉,刘乃安,杨博.基于 RIE 的自适应窄带干扰抑制算法[J].重庆邮电大学学报(自然科学版),2016,28(3):291-296.
作者姓名:付卫红  宋长汉  刘乃安  杨博
作者单位:1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安,710071;2. 航天恒星科技有限公司,北京100086;天地一体化信息技术国家重点实验室,北京100086
基金项目:天津市哲学社会科学规划项目:学习型、服务型、创新型执政党建设整体性研究(TJDJ13-001)
摘    要:针对直接序列扩频(direct sequence spread spectrum,DSSS)通信系统中窄带干扰(narrow-band interference,NBI)抑制问题,将窄带干扰存在性识别技术(recognition of interference existence,RIE)和变换域窄带干扰抑制算法相结合,提出了一种自适应窄带干扰抑制算法.该算法能根据接收到的信号,利用基于能限因子的RIE算法判断接收信号中是否含有窄带干扰信号,从而决定是否需要对其进行干扰抑制处理.理论分析表明,当接收信号中不合窄带干扰或干扰信号较小时,既可减少由于窄带干扰抑制算法对有用信号造成的损伤,提高误码率性能,又能降低系统处理的复杂度.仿真结果表明,自适应窄带干扰抑制方案抑制干扰误码率性能明显优于非自适应窄带干扰抑制方案.

关 键 词:直接序列扩频  窄带干扰存在性识别  自适应窄带干扰抑制
收稿时间:2015/6/23 0:00:00
修稿时间:4/9/2016 12:00:00 AM

Adaptive narrow-band interference suppression algorithm based on recognition of interference existence technology
FU Weihong,SONG Changhan,LIU Naian and YANG Bo.Adaptive narrow-band interference suppression algorithm based on recognition of interference existence technology[J].Journal of Chongqing University of Posts and Telecommunications,2016,28(3):291-296.
Authors:FU Weihong  SONG Changhan  LIU Naian and YANG Bo
Institution:Department of Social Sciences, Tianjin Chengjian University, Tianjin 300384, China
Abstract:Aiming at the narrow-band interference ( NBI ) problem in the direct sequence spread spectrum ( DSSS)communication system, an adaptive NBI suppression ( A-NBI-S) algorithm is proposed in the paper. The new algorithm combined the technology of RIE (recognition of interference existence) with transform domain NBI suppression (NBI-S) algorithm. According to the received signals, the proposed algorithm can determine whether the received signal contains NBI signals by using the RIE algorithm based on energy limiting factor and determine whether the received signals needs to go through the processing of NBI-S. Theoretical analysis shows that, when the received signal is free of NBI or the interference signal is small, A-NBI-S algorithm can reduce the damage to useful signal and improve BER performance. At the same time, it can reduce the computation complexity of DSSS system. Simulation results show that A-NBI-S algorithm is significantly better than non-adaptive NBI-S (NA-NBI-S)algorithm on BER performance.
Keywords:spirit of counter-Japanese  socialist core values  heritage value
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