Joint Channel Estimation and Phase Noise Suppression for OFDM Systems

Yong-Hwa KIM  Seong-Cheol KIM  

IEICE TRANSACTIONS on Communications   Vol.E91-B    No.10    pp.3371-3374
Publication Date: 2008/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.10.3371
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
maximum-likelihood,  minimum mean square error,  orthogonal frequency-division multiplexing (OFDM),  phase noise (PHN),  

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Phase noise (PHN) can cause the common phase error (CPE) and the inter-carrier interference (ICI), both of which impair the accurate channel estimation in orthogonal frequency division multiplexing (OFDM) systems. In this letter, we build a new signal model parameterized by the channel impulse response, the CPE and the ICI. Based on this model, we derive the maximum likelihood estimator (MLE) and the minimum mean square error estimator (MMSEE). Simulation results show that the proposed schemes significantly improve the performance of OFDM systems in the presence of PHN.