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基于差分空时分组码的DS-CDMA系统下行MOE自适应接收机

Adaptive MOE Receiver for DS-CDMA Downlink with Space-time Block Differential Coding
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摘要 DS—CDMA下行链路的性能受到信道衰落和多址干扰的影响。本文提出了一种MOE多用户检测技术与差分空时分组码相结合的新方法。该方法不需要信道估计,并可在克服信道衰落的同时达到抑制多址干扰的目的。为适应无线信道的时变特性,基于阵列处理中广泛应用的分支干扰相消器结构,我们给出了该方法的RLS自适应实现形式。计算机仿真结果证实了本文提出方法的优良性能。 The performance of downlink CDMA systems is influenced by channel fading and multi-access interference. This paper proposes a novel method for MOE multi-user detection in conjunction with space-time block differential coding. The new method does not require channel estimation, and it can combat channel fading and multi-access interference. In order to track time-varying characteristic of wireless channel, an adaptive RLS implementation of this method is presented by using partioned linear interface canceller. Finally, its performances are confirmed by computer simulations.
作者 陈建峰 张贤达 黄辉
机构地区 西安电子科技大学雷达信号处理实验室 清华大学自动化系
出处 《信号处理》 CSCD 2004年第2期157-161,共5页 Journal of Signal Processing
基金 国家自然科学基金(No.60072043)资助
关键词 差分检测 空时码 多用户检测 发射分集 DS-CDMA 信道估计 无线通信 行MOE自适应接收机 differential detection space-time codes transmitter diversity multi-user detection
分类号 TN914.53 [电子电信—通信与信息系统]
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参考文献8

  • 1A.ENaguib,N.Seshadri and A.R.Calderbank,“Space-time coding and signal processing for high data ratewireless communications,”IEEE Signal Processing Magazine,vol.17,no.3,May,2000,pp.76-92.
  • 2M.S.Alamouti,“A simple transmit diversity technique for wireless communications,”IEEE Journal on Select Areasin Communications,vol.16,no.8,October,1998,pp.1451-1458.
  • 3V.Tarokh and H.jafarkhani,“A differential detectionscheme for transmit diversity,”IEEE Journal on Select Areas in Communications,vol.1 8,no.7,July,2000,pp.1169-1174.
  • 4A.G.Dabak,T.Schmidl and C.Sengupta,“Equalization and multi—user detection for spacetime block codingbased transmit diversity(STTD)in frequency selective channels[A],”Proc.of VTC2000(fall)[C].
  • 5G.Klang and A.ENaguib,“Transmit diversity based on space-time block codes in frequency selective reyleigh fading DS—CDMA systems[A]”Proc.of VTC2000[C],May 2000,PP.264-268.
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  • 8Hui Liu,“Signal processing applications in CDMA communications,”’Boston·London:Artech House,2000.
信号处理
2004年 第2期

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