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在数字通信系统中,发送的数据序列中的比特往往具有不等的重要性。为了寻求更可靠的信息传输,提出了一些不等错误保护(UEP)方案。介绍了DS-CDMA系统中的两种基本的UEP技术,并比较了各自的优缺点;研究了这两种UEP技术的性能,给出了各自的BER性能近似表达式。
In digital communication systems, bits in a transmitted data sequence tend to have unequal importance. In order to seek more reliable information transmission, some unequal error protection (UEP) schemes have been proposed. The two basic UEP techniques in DS-CDMA system are introduced and their advantages and disadvantages are compared. The performances of these two UEP techniques are studied, and the approximate expression of BER performance is given.