Joint ICI (Inter Carrier Interference) and INQ (In Phase and Quadrature Imbalance) Compensation in MIMO-OFDM System

This paper investigates the problem of joint ICI (Inter Carrier Interference) and INQ (Inphase and Quadrature imbalance) mitigation in MIMO-OFDM system. We consider the case where the analog front-end suffers from an IQ imbalance and the local oscillator suffers from carrier frequency-offset (CFO).While fast time variations of wireless channel and the presence of CFO induces intercarrier interference (ICI).CFO in conjunction with IBI(Interblock Interference) results into sever intercarrier interference.We propose a MIMO data detector/decoder with PPIC(Progressive Parallel ICI Canceller) and per-tone equalizer (PTEQ),it eliminate these channel impairments iteratively and progressively.It is very suitable for VLSI implementation and it is a potential candidate for data detection/decoding in future high data rate, high mobility,Finally, our simulation results show how these methods would improve the performance in terms of BER in a highly time-variant environment with high delay.