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首页> 美国政府科技报告 >Multistage Decision Feedback and Trellis-Based Multiuser Receivers forConvoluntionally Coded CDMA Systems
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Multistage Decision Feedback and Trellis-Based Multiuser Receivers forConvoluntionally Coded CDMA Systems

机译：用于循环编码CDma系统的多级判决反馈和基于网格的多用户接收机

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In this report, multistage decision feedback and trellis-based multiuserreceivers are studied for convolutionally coded CDMA links. Some of the receiver structures proposed combine the functions of equalization and decoding while some consider the operations separately. A variety of decision feedback approaches are proposed, and through simulations, it is shown that these approaches are able to significantly outperform the conventional basestation architecture. Two trellis-based approaches are also proposed. The first is a partitioned structure which attacks the MUI equalization and decoding operations separately. The second approach is the maximum likelihood sequence estimator for this problem which is a combined equalizer and decoder. This decoder is formulated and its complexity is seen to depend exponentially on the number of users in the system, the number of states in the individual users' encoders and the number of input information bits per interval.

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