SINR Degradation due to Carrier Frequency Offset in OFDM Based Amplify-and-Forward Relay Systems

Yanxiang JIANG  Yanxin HU  Xiaohu YOU  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.1   pp.317-320
Publication Date: 2012/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.317
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
SINR,  CFO,  OFDM,  relay,  

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In this letter, signal to interference plus noise ratio (SINR) performance is analyzed for orthogonal frequency division multiplexing (OFDM) based amplify-and-forward (AF) relay systems in the presence of carrier frequency offset (CFO) for fading channels. The SINR expression is derived under the one-relay-node scenario, and is further extended to the multiple-relay-node scenario. Analytical results show that the SINR is quite sensitive to CFO and the sensitivity of the SINR to CFO is mainly determined by the gain factor and the different power of the direct link channel and relay link channel.