Dynamic Channel Estimation for MIMO-Constant Envelope Modulation

The Multi-Input Multi-Output (MIMO)- Constant Envelope Modulation MIMOCEM is introduced as power and complexity efficient alternative to MIMO-OFDM for wireless backhaul networks. Due to a low resolution ADC (1-bit in the default operation) employed in the MIMO-CEM receiver, MIMO-CEM channel estimation is considered as one of the major challenges toward its real application. A block based adaptive channel estimator was proposed by the authors to estimate MIMO-CEM channel in static and quasi-static channel conditions. In this scheme, channel parameters are iteratively estimated by replicating the received preamble signals.