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Time-varying phase noise and channel estimation in MIMO systems

Hani Mehrpouyan (Institutionen för signaler och system, Kommunikationssystem) ; A.A. Nasir ; Thomas Eriksson (Institutionen för signaler och system, Kommunikationssystem) ; S.D. Blostein ; G.K. Karagiannidis ; Tommy Svensson (Institutionen för signaler och system, Kommunikationssystem)
2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012. Cesme, 17 - 20 June 2012 (1948-3244). p. 560-564. (2012)
[Konferensbidrag, refereegranskat]

Performance of high speed communication systems is negatively affected by oscillator phase noise (PN). In this paper joint estimation of channel gains and Wiener PN in multi-input multi-output (MIMO) systems is analyzed. The signal model for the estimation problem is outlined in detail. In order to reduce overhead, a low complexity data-aided least-squares (LS) estimator for jointly obtaining the channel gains and PN parameters is derived. In order to track PN processes over a frame, a new decision-directed extended Kalman filter (EKF) is proposed. Numerical results show that the proposed LS and EKF based PN estimator performances are close to the CRLB and simulation results indicate that by employing the proposed estimators the bit-error rate (BER) performance of a MIMO system can be significantly improved in the presence of PN.

Nyckelord: base-station coordination, multi-cell joint transmission, OFDMA, power control, scheduling

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Denna post skapades 2012-11-16. Senast ändrad 2017-01-17.
CPL Pubid: 166223


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Institutionen för signaler och system, Kommunikationssystem (1900-2017)


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