Efficient time domain phase noise mitigation in cm wave wireless communications
The topic of this paper is low complexity yet high precision phase noise mitigation in a realistic cm wave radio link. The proposed algorithm for phase noise induced intercarrier interference mitigation works in time domain. We propose a filtering solution that is computationally very simple to implement on silicon. Noise from initial phase noise estimate is removed with cumulative sum filtering instead of a very high order complex tap filter. The performance of the proposed algorithm is evaluated in realistic ITU R Urban Microcell Non Line of Sight channel as well as in white Gaussian noise channel, and with state of the art phase locked loop oscillator generated phase noise. The obtained results show that highly efficient phase noise mitigation can be obtained using the proposed approach. For the example 5G case, the algorithm suppresses the phase noise so that the bit error rate performance is near the case without phase noise.
2016 IEEE Global Conference on Signal and Information Processing (GlobalSIP)