Adaptive equalizer

专利名称：Adaptive equalizer发明人：Fumiaki Koizumi申请号：US09266607申请日：19990311公开号：US06504868B1公开日：20030107

专利附图：

摘要：Since a conventional adaptive equalizer handles an update quantity controlparameter &mgr; as a fixed value, the update quantity control parameter &mgr; is notoptimized adaptively to variation of a channel state and the BER characteristic isdeteriorated. Thereupon, the invention controls a parameter &mgr; for controlling the

update quantity of updating the impulse response of a channel by the adaptive algorithmoperating portion according to an estimated BER value, by performing a BER estimatingprocess by the BER estimating portion and performing an update quantity controlparameter adjusting process by the update quantity control parameter adjusting portion, and increases the parameter &mgr; so that it follows variation of a channel state in anenvironment where the channel state is bad and severely varies and decreases theparameter &mgr; in a good environment where the channel state varies little, andthereby reduces deterioration in BER characteristic which could have been caused by afact that the value of &mgr; is not optimized adaptively to variation of a channel state.

申请人：NEC CORPORATION

代理机构：Sughrue Mion, PLLC

更多信息请下载全文后查看