Architectural implementation of modified K-best algorithm for detection in MIMO systems

Abstract

We present novel architectures for the modified K-best algorithm and its very-large-scale integration implementation for spatially multiplexed wireless multiple-input multiple-output systems. The objective was to propose a simplified architecture based on the algorithm and to significantly improve the suitability for hardware implementation. Two different architecture designs were proposed: a distributed arithmetic- based tree-search detector and a breadth-first search sphere detector. The implementations were performed to obtain a configurable architectural solution for different antenna configurations and constellations. The synthesis analysis shows that the proposed architectures achieve a throughput of > 500 Mbps with reduced hardware complexity compared to previously reported architectures.