Regularised equalisation for OFDM systems with BEM-based channel estimation

Authors

Wei Han, University of WollongongFollow
Jun Tong, University of WollongongFollow
Qinghua Guo, University of WollongongFollow
Jiangtao Xi, University of WollongongFollow
Yanguang Yu, University of WollongongFollow

RIS ID

127386

Publication Details

W. Han, J. Tong, Q. Guo, J. Xi & Y. Yu, "Regularised equalisation for OFDM systems with BEM-based channel estimation," in 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017, 2017, pp. 1-6.

Abstract

This paper studies the channel estimation and equalisation of orthogonal frequency-division multiplexing (OFDM) systems over doubly selective channels. We consider practical channel estimation schemes based on basis expansion model (BEM) and clustered pilots. We investigate the influence of the parameters of the channel estimation scheme, including the dimensionality of the BEM basis and bandwidth chosen for the frequency-domain (FD) channel matrix. We address the performance degradation of linear and nonlinear equalisation due to imperfect channel estimation and study the usage of regularisation to enhance the performance. The numerical results show that regularisation can effectively enhance the detection performance.