High-Performance MIMO Receivers Based on Multi-Stage Partial Parallel Interference Cancellation

In this paper, a multi-stage partial parallel interference canceller (MS-PPIC) is considered as a low complexity alternative to the APP detector and its Max-Log variant. Non-linear cancellation metrics are derived for the MS-PPIC and its performance is compared with the APP detector for flat and dispersive channels. It is shown that the MS-PPIC can provide similar performance compared to APP and, for low coding rates, superior performance compared to Max-Log-APP, at a substantially lower computational complexity.