Complexity Reduced QRM-ML Block Signal Detections for Single-Carrier Transmission

Maximum likelihood block signal detection with QR decomposition and M-algorithm (QRM-MLBD) can significantly improve the Bit Error Rate (BER) performance of Cyclic Prefix-added Single-Carrier (CP-SC) block transmission when compared to the Frequency-Domain Equalization (FDE) based on the Minimum Mean Square Error (MMSE) criterion. However, in order to achieve the sufficiently improved performance, a fairly large number M of surviving paths in the M-algorithm is required. Recently, to solve this problem, the authors proposed two types of complexity reduced QRM-MLBD schemes.