Performance evaluation of MLD and ZFE in a MIMO OFDM system impaired by carrier frequency offset, phase noise and timing Jitter

Abstract

In this paper performances of maximum likelihood detection (MLD) and zero forcing equalizer (ZFE) in MIMO OFDM systems are analyzed with the combined effect of phase noise, timing jitter and normalized CFO over Rayleigh fading channels. Results include the bit error rate (BER), power penalty and BER floor for different value of SNR, number of receiving and transmitting antennas, variance of phase noise and variance of timing jitter. It is observed that OFDM system suffers due to the presence of normalized CFO, phase noise and timing jitter. Significant improvements in this system can be obtained by using multiple antenna techniques. Results show that compare to ZFE the performance of MLD is better for a given parameter of power penalty at a given BER due to timing jitter. Also MLD gives lower BER floor over ZFE due to phase noise.