異步CDMA移動(dòng)通信系統(tǒng)中采用分集接收的多用戶檢測(cè)器
A FAMILY OF MULTIUSER RECEIVERS WITH DIVERSITY RECEPTION IN ASYCHRONOUS CDMA MOBILE COMMUNICATIONS
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摘要: 在CDMA移動(dòng)通信系統(tǒng)中,多址接入干擾可以通過(guò)多用戶檢測(cè)技術(shù)來(lái)消除,而分集接收可以減小信道衰落的影響。本文給出了一類(lèi)應(yīng)用解相關(guān)檢測(cè)、天線分集、RAKE多徑分集技術(shù)的接收機(jī),并對(duì)這一類(lèi)接收機(jī)的性能做了分析。結(jié)果表明,在上行鏈路中,應(yīng)用多用戶檢測(cè)和分集接收能夠極大地提高接收機(jī)的性能。
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關(guān)鍵詞:
- 多用戶檢測(cè); 分集接收; 異步碼分多址信道
Abstract: In CDMA mobile communication systems, multiple access interference can be cancelled by multiuser detection technique. The degradation by channel fading can be reduced by diversity reception. This paper investigates a family of multiuser receivers that combined decor-relating detection,antenna diversity and RAKE multipath diversity. The performances of the multiuser receivers are analyzed. The results demostrate a significant increase in the performances of the receivers by using multiuser detection and diversity reception. -
Lupas R, et al, Near-far resistance of multiuser detectors in asychronous channels. IEEE Trans. on[2]Comm. 1990, 38(4): 496-507.[3]Zonar Z. Multiuser Detection and Diversity Combining for Wireless CDMA System, Wireless and Mobile Communications, Holtzman J, Goodman D J. Eds. Boston: Kluwer, 1994, 51-65.[4]Proakis J. Digital Communications, 1st ed, New York: McGraw-Hill, 1983, chapter 7.[5]Eng T, et al, Coherent DS-CDMA performance in Nakagami multipath fading, IEEE Trans. on[6]Comm, 1995, C-43(2/3/4): 1134-1143.[7]Lee W. Overview of cellular CDMA. IEEE Trans. on VT, 1991, 40(2): 291-302. -
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