Performance of V-BLAST MIMO-OFDM Systems with Carrier Frequency Offset

In this paper we study the effects of carrier frequency offset (CFO) on the performance of a Vertical Bell Labs Layered Space-Time (V-BLAST) orthogonal frequency multiplexing (OFDM) system. It is shown that CFO introduced intercarrier interference (ICI) can cause significant performance degradation. ICI makes initial signal detection unreliable and introduces error propagation for the subsequent interference cancellation stages in the V-BLAST algorithm. An ICI cancellation method to improve the error performance is proposed which uses the initial data estimated. For the uncoded system used in the simulations, the technique is effective in reducing the symbol error rate at high signal-to-noise ratio values