An implementation of MIMO detection in TD-LTE based on General Purpose Processor

This paper presents a method of implementing Multiple Input Multiple Output (MIMO) detection on General Purpose Processor (GPP) with Single Instruction Multiple Data (SIMD) instructions. In the receiver of Long Term Evolution (LTE) communication system MIMO detection plays a rather important role. How to reduce the processing latency of MIMO detection becomes increasingly significant. The advantages of GPP compared with programmable hardware provide us a considerable solution to cope with this problem. SIMD is another effective manner as it is able to increase the computing parallel degree. For each algorithm of MIMO detection, fixed-point operations which have higher parallel degree than floating-point operations may be a better choice to further reduce the process delay. Nevertheless, the performance attained by fixed-point is still a factor need to be considered while its latency is quite low.