In this paper, a carrier recovery scheme for phase noise mitigation (in the presence of imperfect synchronization and channel estimation) is proposed for orthogonal frequency division multiplexing (OFDM) based wireless backhaul. This scheme models the phase noise as a piece-wise linear function and compensate the phase noise within each OFDM symbol. It is shown that the carrier recovery scheme can be applied to both OFDM and orthogonal frequency-division multiple access (OFDMA). Since the proposed scheme does not require detailed knowledge of statistical properties of the phase noise, it can be easily applied to practical OFDM/OFDMA systems. Hence the proposed scheme is applicable to both point-to-point and point-to-multipoint backhauls.
['Xiaoming Chen', 'Andreas Wolfgang']
Phase Noise Mitigation in OFDM-Based Backhaul in the Presence of Channel Estimation and Synchronization Errors