一種基于ML準則的適用于頻率選擇性多徑衰落的多用戶檢測算法
A MULTIUSER DETECTOR DERIVED FROM ML CRITERIA FOR CDMA FREQUENCY SELECTIVE FADING CHANNEL
-
摘要: 本文采用ML準則得出了適于頻率選擇性衰落的線性解相關(guān)算法。仿真表明本方法性能優(yōu)于Zvonar提出的先解相關(guān)再最大比值合并的算法;且該方法由于采用等價擴頻序列實現(xiàn),硬件耗費也較少。
-
關(guān)鍵詞:
- 多用戶檢測; 解相關(guān); 頻率選擇性衰落信道
Abstract: In this paper, a decorrelator for multiuser detection derived from ML criteria in CDMA system is proposed for frequency selective fading channels. Simulations prove the better performance of this method than the method proposed by Zvonar in which the paths of the same user are combined after decorrelating. This method utilizes equivalent spreading codes for decorrelating, thus the hardware complexity is reduced. -
Lupas R,Verdu S.Neax-fax resistance of multi-user detectors in asynchronous channels,IEEE Trans.on Commun.,1990,COM-38(4),496-508.[2]Lupas R,Verdu S.Linear multiuser detectors for asynchronous code-division multiple-access channels,IEEE Trans.on Inform.Theory,1989,IT-35(1),123-136.[3]Zvonar Z,Brady D.Linear multipath-decorrelating receivers for CDMA frequency-selective fading channels,IEEE Trans.on Comm.,1996,COM-44(6),650-653.[4]李道本編著．信號的統(tǒng)計檢測與估計理論．北京：北京郵電大學(xué)出版社，1996，第三章，第3-2節(jié)．[5]Proakis J.Digital Communications,3rd Edition,New York:McGraw-Hill,1995,Chap.14-1-1.[6]方開泰編著．實用多元統(tǒng)計分析．上海：華東師范大學(xué)出版社，1989，第一章，第1.4節(jié)． -
計量
- 文章訪問數(shù): 2184
- HTML全文瀏覽量: 105
- PDF下載量: 392
- 被引次數(shù): 0
下載:
