摘要
分析用于直接序列扩频通信中窄带干扰抑制的几种非线性自适应滤波器,提出了一种称为非线性LTJ(Lattice and Transversal Joint)滤波器的新型非线性抗干扰滤波器。对比几种滤波器的信噪比改善性能、收敛速度以及计算复杂度,发现非线性LTJ滤波器具有收敛速度快的优点,并且在干扰强度较大时,其抗干扰性能要比非线性Lattice滤波器好。
Several kinds of nonlinear self-adaptable filters for the suppression of the narrow-band interference in the DS （direct sequence） spread spectrum communications are discussed. Inspired by these filters a new kind of nonlinear filter called nonlinear LTJ filter is proposed. Their SNR improvement and convergence speed in the narrow-band interference suppression in the DS-SS communication and their computation complexity are also discussed. The LTJ nonlinear filter has the advantage of fast convergence and in the circumstance of strong interference it suppresses the interference better than the lattice filter.
出处
《成都信息工程学院学报》
2007年第3期343-346,共4页
Journal of Chengdu University of Information Technology
基金
成都信息工程学院科研基金资助项目(CRF200526)
关键词
直接序列扩频通信
窄带干扰
非线性自适应滤波器
DS spread spectrum communication
narrow-band interference
nonlinear adaptable filter
