Ordered Parallel Detection for Multiple Antenna Wireless Systems

The parallel detection (PD) is considered as a simple yet effective detector for multiple antenna wireless systems. PD is advantageous since it is faster than sequential detection, it does not require power ordering at the receiver and it reduces the system latency. However, the performance of PD is unsatisfied because of the error propagation which is strongly related to the accuracy of interference from the estimate of other layers. In this paper, we propose two ordered parallel detection (OPD) algorithms for multiple antenna wireless systems. Unlike classical parallel detection, to detect the desired signal for each layer, we only subtract the signals which have the higher SNR than the desired signal from the received signal, so we can get more accurate detected signals than classical PD. Also the proposed algorithms allow for concurrent detection of all the symbols and thus reduce the system delay. The proposed OPD algorithms show marked improvement in performance over the classical PD.