同步DS-CDMA系统快衰落多径信道时频决策驱动多用户检测器

12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI:10.1109/PIMRC.2001.965453

Ö. Ertug, B. Baykal, B. Unal

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引用次数: 2

摘要

在快速衰落条件下，由于信道状态估计存在误差，导致RAKE接收机的性能下降。广义平稳不相关散射体信道模型倾向于时频正则表示，并在频率轴上提供额外的分集。也就是说，联合多径多普勒分集模型使得基于连续干扰抵消和多级干扰抵消思想的非线性决策驱动时频多用户检测器得以发展。仿真结果表明，与以前提出的时频多用户检测器相比，所提出的非线性决策驱动时频多用户检测器具有显著提高误码率的性能，同时具有很强的抗远近效应能力。

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Time-frequency decision-driven multiuser detectors over fast-fading multipath channels for synchronous DS-CDMA systems

RAKE receivers suffer degradation in performance under fast fading due to errors in channel state estimation. The wide-sense stationary uncorrelated scatterer channel model tends itself to time-frequency canonical representation, and provides additional diversity in the frequency axis. That is, the joint multipath-Doppler diversity model enables the development of nonlinear decision-driven time-frequency multiuser detectors based on successive interference cancellation and multistage interference cancellation ideas. Simulation results demonstrate that the proposed nonlinear decision-driven time-frequency multiuser detectors promise substantially improved bit-error-rate performance compared to previously proposed time-frequency multiuser detectors while exhibiting strong resistance to the near-far effect.

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12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)

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