DS/CDMA系统分集组合的最优和次最优多用户检测

2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277) Pub Date : 2001-10-28 DOI:10.1109/MILCOM.2001.986014

J. Damnjanovic, B. Vojcic

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引用次数: 0

摘要

在本文中，我们提出了联合多用户检测和分组合并，并结合错误控制重传协议来提高多用户通信的吞吐量。多用户检测利用先进的信号处理技术，利用多用户干扰的结构来解调用户的数据。分组合并是对标准自动重复请求协议的一种增强，错误的分组不会被丢弃，而是保留并与重传的分组合并，以改进新的决策。提出了三种方案——组合数据包的最优检测方案和两种次优多用户检测方案。利用马尔可夫链理论，提出了一种计算吞吐量的方法。结果表明，所得的理论值与仿真结果吻合较好。本文提出的数据包结合多用户检测是一种自适应方案，鲁棒性和容量得到了显著提高。

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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Optimum and suboptimum multiuser detection for diversity combining in DS/CDMA systems

In this paper we propose joint multiuser detection and packet combining in conjunction with an error control retransmission protocol to improve throughput in multiuser communications. Multiuser detection utilizes advanced signal processing techniques to demodulate the user's data by exploiting the structure of multiuser interference. Packet combining is an enhancement of the standard automatic repeat request protocol, whereby the erroneous packets are not discarded but preserved and combined with retransmitted ones to improve new decisions. Three schemes - optimum detection of combined packets and two suboptimum multiuser detection schemes - are suggested. Using the Markov chain theory we present a method for throughput calculation. It is shown that the obtained theoretical values closely agree with the simulation results. The proposed packet combining with multiuser detection is an adaptive scheme with considerably improved robustness and capacity.

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2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277)

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