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已经证明,在直接序列扩展频谱接收机中,最小均方自适应滤波器是一种抑制窄带干扰的有效技术.大部分研究曾假设自适应滤波器可以获得完善的同步,即在干扰源抑制以前获得同步.遗憾地是由于干扰的影响,难于或根本不可能获得同步.本文介绍一种接收机结构,它在自适应干扰源抑制之后能获得同步,并反馈到抑制滤波器.已指出的误码率的效果,证明了延迟锁定环连同自适应滤波器在单音干扰中的性能.这些性能效果与那些具有正确完善同步的自适应滤波器性能效果相似.
It has been shown that the least mean square adaptive filter is an effective technique to suppress narrowband interference in direct sequence spread spectrum receivers.Most studies have assumed that adaptive filters can achieve perfect synchronization, that is, before interference suppression It is regrettable that it is difficult or impossible to obtain synchronization due to the influence of interference.This paper presents a receiver structure that can be synchronized after adaptive interference suppression and fed back to the suppression filter. Bit rate, the performance of delay locked loops along with adaptive filters in single-tone interference is demonstrated.These performance effects are similar to those of adaptive filters with proper and perfect synchronization.