SC-FDMA上行系统中一种频域迭代块DFE均衡方法

doi:10.3969/j.issn.1001-2400.2013.02.005

J4 ›› 2013, Vol. 40 ›› Issue (2): 25-30.doi: 10.3969/j.issn.1001-2400.2013.02.005

• Original Articles • Previous Articles Next Articles

Frequency domain iterative block DFE for SC-FDMA uplink system

WANG Qiucai^1,2;YUAN Chaowei¹;ZHANG Jinbo¹;LI Yingxue³

(1. School of Information and Communication Engineering, Beijing Univ. of Posts and Telecommunications, Beijing 100876，China;
2. School of Electronic and Control Engineering, Chang'an Univ.，Xi'an 710064，China;
3. School of Electronic Engineering, Beijing Univ. of Posts and Telecommunications, Beijing 100876，China)

Received:2012-09-13 Online:2013-04-20 Published:2013-05-22
Contact: WANG Qiucai E-mail:qcwang@chd.edu.cn

Abstract

Abstract:

Focusing on intersymbol interference(ISI) and multiuser interference(MUI) existing in single-carrier frequency-division multiple access(SC-FDMA) in multipath fading channels, a new multiuser receiver based on diversity combining is designed, and a novel frequency domain iterative block decision feedback equalization(DFE) approach for multiuser SC-FDMA is proposed. By exploiting the input-decision correlation, it optimizes the tap coefficients of the feedforward and feedback filters, in such a way that the maximized signal-to-interference-plus-noise ratio(SINR) is achieved for each iterative process, thus removing residual interference, and gradually improving the reliability of the detected data. Simulation results show that the proposed approach effectively reduces the bit error rate(BER) and provides significant robustness against multipath fading.

Key words: single-carrier frequency-division multiple access(SC-FDMA), intersymbol interference(ISI), frequency domain(FD), decision feedback equalization(DFE)

WANG Qiucai;YUAN Chaowei;ZHANG Jinbo;LI Yingxue. Frequency domain iterative block DFE for SC-FDMA uplink system[J].J4, 2013, 40(2): 25-30.

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Frequency domain iterative block DFE for SC-FDMA uplink system

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