A low complexity OFDM receiver with combined GAMP and MF message passing

Authors

Zhengdao Yuan, Zhengzhou Institute of Information Science and Technology
Chuanzong Zhang, Zhengzhou University, Aalborg University, Nanyang Institute of TechnologyFollow
Zhongyong Wang, Zhengzhou University
Qinghua Guo, University of WollongongFollow
Sheng Wu, Tsinghua University, Beijing University of Posts and Telecommunications

RIS ID

130737

Publication Details

Z. Yuan, C. Zhang, Z. Wang, Q. Guo & S. Wu, "A low complexity OFDM receiver with combined GAMP and MF message passing," Telecommunication Systems, vol. 71, (3) pp. 425-432, 2019.

Abstract

With a unified belief propagation (BP) and mean field (MF) framework, we propose an iterative message passing receiver, which performs joint channel state and noise precision (the reciprocal of noise variance) estimation and decoding for OFDM systems. The recently developed generalized approximate message passing (GAMP) is incorporated to the BP-MF framework, where MF is used to handle observation factor nodes with unknown noise precision and GAMP is used for channel estimation in the time-frequency domain. Compared to state-of-the-art algorithms in the literature, the proposed algorithm either delivers similar performance with much lower complexity, or delivers much better performance with similar complexity. In addition, the proposed algorithm exhibits fastest convergence.