预编码可变比特率多用户系统的盲信道估计

Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154) Pub Date : 2000-10-29 DOI:10.1109/ACSSC.2000.910767

Zhengyuan Xu

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引用次数: 2

摘要

预编码器已被证明能够提供源多样性和更自由的设计。本文采用基于多速率滤波器组结构的块传输预编码技术。为了满足各种高数据速率下的多用户通信需求，使用不同的滤波器组作为预编码器，具有相应的系数和上下采样率。然而，由于高速通信中存在未知多径，接收到的数据存在不同的干扰，如多用户干扰、码间干扰和块间干扰。为了估计期望用户的多径信道，我们通过使用当前系统中与该信道相关的所有签名来推广子空间方法。这样可以获得更好的信道估计性能。该用户的延迟也可以与信道估计一起进行联合估计。

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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Blind channel estimation for precoded variable bit-rate multiuser systems

The precoder has been shown to be able to provide source diversity and more freedom in design. In this paper we employ precoding techniques for block transmission based on a multirate filterbank structure. To meet multiuser communication requirements for various high data-rates, different filterbanks are used as precoders with corresponding coefficients and up/down sampling rates. However due to high speed communication in the presence of unknown multipath, different interferences exist in the received data such as multiuser interference, intersymbol interference and interblock interference. To estimate the multipath channel for a desired user we generalize the subspace method by employing all signatures associated with this channel in the current system. In this way a better performance for the channel estimate can be achieved. The delay for that user can also be jointly estimated together with channel estimation.

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Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)

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