針對實際應(yīng)用中的DS/CDMA系統(tǒng)多為多徑衰落信道下的異步DS/CDMA系統(tǒng)情況，通過對用于AWGN信道下的同步DS/CDMA系統(tǒng)中的常規(guī)盲多用戶檢測算法的改進，使這類算法在多徑衰落信道下的異步DS/CDMA系統(tǒng)中仍具有很好的性能。理論分析和計算機仿真結(jié)果證實了改進方法的可行性。
關(guān) 鍵 詞 多址干擾; 盲多用戶檢測; 異步碼分多址; LS準則

Abstract Aim at the case that the practical DS/CDMA system often is asynchronous DS/CDMA system in multipath fading channel, some conventional blind multi-user detection algorithms, which were applied to synchronous DS/CDMA system in AWGN channel, are modified, and to use them to asynchronous DS/CDMA system in multipath fading channel,these modified algorithms have good performance.Theoretical analysis and computer simulation confirm that these modified methods are available.
Key words multiple access inference; blind multiuser detection; asynchronous CDMA; LS criterion