Phase noise suppression in MIMO OFDM systems with incoherent phase noise

This paper presents a remedy to the phase noise problem in the multiple-input/multiple-output (MIMO), orthogonal frequency division multiplexing (OFDM) systems with incoherent phase noise. The phase noise incoherence (PNI) is a common condition that arises when different channels in a MIMO system use different local oscillator (LO) signals. Phase noise tracking algorithms that treat PNI systems similarly to the phase noise coherent systems, are not sufficiently efficient. We propose a new phase noise tracking algorithm, suitable for PNI systems and we will show by means of accurate numerical simulations on an end-to-end, 802.11n simulation platform, the performance improvements that can be gained with our proposed algorithm.