We describe a low-complexity method for time-domain compensation of phase noise in OFDM systems. We extend existing methods in several respects. First, we suggest using the Karhunen-Loève representation of the phase noise process to estimate the phase noise. We then derive an improved data-directed choice of basis elements for LS phase noise estimation and present its total least square counterpart problem. The proposed method helps overcome one of the major weaknesses of OFDM systems. We also generalize the time-domain phase noise compensation to the multiuser MIMO context. Finally, we present simulation results using both simulated and measured phased noise. We quantify the tracking performance in the presence of residual carrier offset.
Bibliographical noteFunding Information:
Manuscript received August 15, 2016; revised April 18, 2017 and July 29, 2017; accepted August 3, 2017. Date of publication August 15, 2017; date of current version August 31, 2017. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Joseph Cavallaro. This work was supported by the Israel Science Foundation under Grant 903/2013. (Corresponding author: Michal Yemini.) The authors are with the Faculty of Engineering, Bar-Ilan University, Ra-mat Gan 52900, Israel (e-mail: email@example.com; michal.yemini. firstname.lastname@example.org).
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- Karhunen-Loève representation
- Phase noise
- residual carrier offset
- subspace tracking