DS-UWB系统中基于线性预测的盲多用户检测

doi:10.3969/j.issn.1001-2400.2010.04.012

J4 ›› 2010, Vol. 37 ›› Issue (4): 648-654.doi: 10.3969/j.issn.1001-2400.2010.04.012

DS-UWB系统中基于线性预测的盲多用户检测

康晓非^1,2;杨家玮¹

(1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071；
2. 西安科技大学通信与信息工程学院，陕西西安 710054)

收稿日期:2009-07-01 修回日期:2009-09-11 出版日期:2010-08-20 发布日期:2010-10-11
通讯作者: 康晓非
作者简介:康晓非(1973-)，男，西安电子科技大学博士研究生，E-mail: kangxiaofei@sina.com．
基金资助:
国家杰出青年科学基金资助项目(60725105);国家重点基础研究发展计划(973计划)资助项目(2009CB320404)

Blind multi-user detector based on linear prediction for DS-UWB systems

KANG Xiao-fei^1,2;YANG Jia-wei¹

(1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071， China;
2. College of Comm. and Info. Eng., Xi'an Univ. of Sci. and Tech., Xi'an 710054， China)

Received:2009-07-01 Revised:2009-09-11 Online:2010-08-20 Published:2010-10-11
Contact: KANG Xiao-fei

摘要/Abstract

摘要：

针对超宽带(UWB)系统中的码间干扰(ISI)和多址干扰(MAI)问题，将线性预测方法应用于直接序列超宽带(DS-UWB)系统中进行盲均衡和盲多用户检测．该算法首先对接收数据进行线性变换和线性预测来抑制多址干扰，再对线性预测误差相关矩阵进行奇异值分解(SVD)来实现信道估计和均衡，消除码间干扰．仿真结果表明，在IEEE 802.15.3a信道模型下，与传统的Rake接收机以及盲MMSE接收机相比较，该算法具有较低的误码率和较好的抗远近效应能力．

关键词: 超宽带, 线性预测, 盲多用户检测, 信道估计

Abstract:

A blind multi-user detection algorithm based on linear prediction is proposed for the direct sequence ultra-wideband (DS-UWB) system to provide resistance to multiple access interference (MAI) and inter symbol interference (ISI). The algorithm first applies linear transformation and linear prediction on the received data, in order to suppress MAI, and then estimate and equalize the channel by Singular Value Decomposition (SVD) of the prediction error correlation matrix. According to the simulation results with the IEEE 802.15.3a UWB channel model, the proposed algorithm exhibits reasonably good performance and near-far resistance in multiuser environment compared with the conventional Rake receiver and blind MMSE receiver.

Key words: ultra-wideband (UWB), linear prediction, blind multi-user detection, channel estimation

康晓非;杨家玮. DS-UWB系统中基于线性预测的盲多用户检测[J]. J4, 2010, 37(4): 648-654.

KANG Xiao-fei;YANG Jia-wei. Blind multi-user detector based on linear prediction for DS-UWB systems[J]. J4, 2010, 37(4): 648-654.

参考文献

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DS-UWB系统中基于线性预测的盲多用户检测

Blind multi-user detector based on linear prediction for DS-UWB systems

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