摘要
研究了一种新颖的多址准同步CDMA方式。理论推导了准同步CDMA性能表达式。在性能评价的基础上 ,构造了两族新的扩频码集。分析表明 ,采用新码集时 ,准同步CDMA性能要远优于异步CDMA。
An analysis of a novel multiple access technology, quasi synchronous CDMA (QS CDMA) is presented. An expression for average bit error rate (BER) as a function of code parameters is obtained. Then two kinds of new spread codes are constructed for QS CDMA. The results show the performance of QS CDMA using new spread codes is much better than the performance of asynchronous CDMA. Finally, QS CDMA used in the reverse channel of mobile satellite communication is discussed and the results are also acquired.
出处
《高技术通讯》
EI
CAS
CSCD
2001年第1期48-52,共5页
Chinese High Technology Letters
基金
863计划资助项目!(86 3 2 8 2 )
关键词
卫星移动通信
信道
准同步CDMA
移位M序列
移位正交M序列
Mobile satellite communication, Channel, Quasi synchronous CDMA (QS CDMA), Phase shift m sequence, Phase shift orthogonal m sequence
