Common phase error correction with feedback for OFDM in wireless communication

Orthogonal frequency division multiplexing (OFDM) systems are very sensitive to phase noise caused by oscillator instabilities. In this paper the phase noise is resolved into two components, namely the common phase error (CPE), which affects all the subchannels equally and the intercarrier interference (ICI), which is caused by the loss of orthogonality of the subcarriers. We present a technique to estimate and correct the CPE component and demonstrate its effectiveness when applied to a broadband fixed wireless access (BFWA) data transmission system for the multichannel multipoint distribution service (MMDS) band. We show a performance increase up to 6 dB when applying the CPE correction in terms of the tolerance to the phase noise variance, /spl sigma//sub /spl psi///sup 2/.