CDMA下行链路的决策反馈均衡

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI:10.1109/VTC.2002.1002601

Jürgen F. Rößler, L. Lampe, W. Gerstacker, J. Huber

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引用次数: 17

摘要

对于在频率选择信道上传输的线性调制信号，一个众所周知的接收机策略是信道均衡。最近有人提出在CDMA下行链路中采用最小均方误差(MMSE)信道均衡器。在本文中，我们引入了一种新的接收机概念，使用MMSE信道均衡作为第一阶段，MMSE决策反馈均衡(DFE)利用解码单元的软反馈作为第二阶段。比较了两种方案在CDMA下行链路中的应用。事实证明，在信道解码后，与传统的MMSE信道均衡相比，我们获得了大约1db的增益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Decision-feedback equalization for CDMA downlink

A well-known receiver strategy for a linearly modulated signal transmitted over a frequency-selective channel is channel equalization. Recently it was proposed to employ a minimum mean-squared error (MMSE) channel equalizer for the downlink of CDMA. In this paper, we introduce a new receiver concept using MMSE channel equalization as a first stage and MMSE decision-feedback equalization (DFE) utilizing soft feedback from the decoding unit as a second stage. Both schemes are compared for the downlink of CDMA. It turns out, that after channel decoding we gain about 1 dB compared to conventional MMSE channel equalization.

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Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)

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