S-CDMA-HFC系统初始接入进程分析

Analysis of the initialization process for the S-CDMA-HFC system

介绍了 S- CDMA - HFC系统上行信道初始接入进程 ,分析了初始接入进程对同步 CDMA终端性能的影响和异步 CDMA终端的性能 ,给出了实验结果与结论 .实验结果表明 :在不同信道条件下 ,CDMA终端 (包括同步CDMA终端和异步 CDMA终端 )的比特误码率性能都随着异步 CDMA终端的增多而下降 ;对同步 CDMA终端 ,在异步 CDMA终端数目达到一定程度时 ,比特误码率性能就会差到不符合要求 ;而异步 CDMA终端的比特误码率性能都不是很理想 .

The initialization process of the S\|CDMA\|HFC system is introduced. The impact of the initialization process on the synchronous CDMA terminals and the performance of the asynchronous CDMA terminals are analyzed. The experimental results and conclusions are given. The results indicate, the bit error rate(BER) of the CDMA terminals ascends when the asynchronous users increase under different channel conditions. For the S\|CDMA terminals, the BER performance will be worse than requirement when the number of the A\|CDMA terminals come up to a certain degree. Meanwhile, the BER performance of the A\|CDMA terminals is not good under any circumstances.