Turbo Receiver Design for Phase Noise Mitigation in OFDM Systems
Abstract
This paper addresses the issue of phase noise in OFDM systems. Phase noise (PHN) is a transceiver impairment resulting from the non-idealities of the local oscillator. We present a case for designing a turbo receiver for systems corrupted by phase noise by taking a closer look at the effects of the common phase error (CPE). Using an approximate probabilistic framework called variational inference (VI), we develop a soft-in soft-out (SISO) algorithm that generates posterior bit-level soft estimates while taking into account the effect of phase noise. The algorithm also provides an estimate of the phase noise sequence. Using this SISO algorithm, a turbo receiver is designed by passing soft information between the SISO detector and an outer forward error correcting (FEC) decoder that uses a soft decoding algorithm. It is shown that the turbo receiver achieves close to optimal performance.
Keywords
Cite
@article{arxiv.1001.2298,
title = {Turbo Receiver Design for Phase Noise Mitigation in OFDM Systems},
author = {Gokul Sridharan and Teng Joon Lim},
journal= {arXiv preprint arXiv:1001.2298},
year = {2010}
}
Comments
17 pages; 1 figure. Shorter version of this paper was submitted to ISIT 2010