Spectral efficiency and error-exponents of randomly-spread CDMA with linear multiuser receivers over multipath Rayleigh fading channels

2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599) Pub Date : 2002-08-07 DOI:10.1109/IZSBC.2002.991769

O. Ertug, Berna Sayraq Gnal, B. Baykal

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引用次数: 3

Abstract

We analyze the spectral efficiency - sum-rates capacity per temporal degrees of freedom - and error-exponents of the uplink of randomly-spread CDMA systems with diversity-combining linear multiuser receivers over time-varying frequency-selective multipath Rayleigh fading channels. Assuming equal-rate/equal-energy identical users and statistically identical channels for each user, the analysis of the closed-form spectral efficiency and the corresponding sum-rates error-exponent expressions in terms of the key system parameters for both the correlated-waveform vector multi-access channel model with optimum joint-ML multiuser decoding as well as with the linear RAKE, decorrelating and MMSE multiuser receivers followed by suboptimal single-user ML decoding sheds light on to asymptotic system behaviour of large-dimensional channel-coded CDMA systems with linear multiuser receivers over multipath Rayleigh fading channels.

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多径瑞利衰落信道下线性多用户随机扩展CDMA的频谱效率和误差指数

我们分析了具有分集组合线性多用户接收机的随机扩展CDMA系统在时变选频多径瑞利衰落信道上的上行链路的频谱效率(每个时间自由度的和速率容量)和误差指数。假设等速率/等能量相同的用户和每个用户统计上相同的信道，分析了具有最佳联合ml多用户解码的相关波形矢量多址信道模型以及具有线性RAKE的关键系统参数的封闭形式频谱效率和相应的和率误差指数表达式。解相关和MMSE多用户接收机，然后是次优单用户ML解码，揭示了在多径瑞利衰落信道上具有线性多用户接收机的大维信道编码CDMA系统的渐近系统行为。

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2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)

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