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A high performance massive MIMO detector based on log-domain belief-propagation

Massive multiple-input multiple-output (MIMO) is a promising technology in the 5G wireless communication system. In this paper, we propose a high performance and ASIC implementation friendly massive MIMO detector. An iterative belief propagation (BP) detection method is employed where the symbol message vector is transformed into log-domain to reduce the complexity. As a case study, we have designed and synthesized a pipeline degree-64 variable node for 64×64 16-QAM MIMO system by using a CMOS 130 nm technology with a cell area of 6.1 mm2 and 600K logic gates. Compared with existing methods, the proposed detector has more than 10dB performance gain with even lower complexity which shows a high potential for the 5G systems.