ANALYTICAL EXIT FUNCTIONS FOR THE PERFORMANCE EVALUATION OFITERATIVE MIMO RECEIVERS WITH CHANNEL ESTIMATION ERROR

摘要

Analytical extrinsic information transfer (EXIT) func-tions provide an accurate and flexible method to analyze andcalculate the performance of iterative linear multiple input-multiple output (MIMO) receivers through their decomposi-tion into independent elementary blocks, such as the linearcombiner or the demapper. These analytical functions havebeen shown to be very accurate to evaluate the performanceof linear MIMO receivers with perfect channel knowledge inRayleigh-fading channels.This contribution extends this analysis to MIMO re-ceivers with channel estimation, deriving new analyticaltransfer functions and adapting the performance evalua-tion algorithm. Bit error rate (BER) results are providedfor training-based and soft decision directed expectation-maximization (EM) channel estimation techniques, showingthe validity and accuracy of this analysis method.