摘要
主要讨论了量化比特数和取样间隔对数字匹配滤波器 (DMF)解扩电路性能的影响 ,通过直扩系统 (DSSS)的仿真结果表明 :DMF的量化比特数取 3时 ,量化误差可忽略不计 (近似为无穷量化结果 ) ;而在低抽样率下依靠DMF的样值序列前端处理 (FEP)可以使系统误码率达到高抽样率的效果 。
In this paper, the effects of quantizing bit number and sampling interval on the performance of DMF despreading circuit is investigated. It is found through simulation for DSSS that the result of 3-bit quantization is very near to the infinite quantization.In addition,the system BER of low sampling rate can be improved by the front-end processor(FEP)operation to be the same as that of high sampling rate while cost of hardware is largely reduced.
出处
《电讯技术》
北大核心
2002年第2期8-13,共6页
Telecommunication Engineering
关键词
直扩系统
数字匹配滤波器
设计仿真
DSSS
Digital matched filter
Quantizing bit number
Sampling interval
Matlab simulation
