A 0.58mm2 2.76Gb/s 79.8pJ/b 256-QAM massive MIMO message-passing detector

Wei Tang, Chia-Hsiang Chen, Zhengya Zhang
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引用次数: 19

Abstract

A 0.58mm2 40nm CMOS message-passing detector (MPD) is designed for a 256-QAM massive MIMO system supporting 32 concurrent mobile users in each time-frequency resource. Leveraging channel hardening in massive MIMO, a symbol hardening technique is proposed to reduce MPD's complexity by more than 60% with minimal SNR loss. The MPD is implemented in a 4-layer 2-way interleaved architecture to enable a 2.76Gb/s throughput (average 4.9 iterations at 27dB SNR with early termination) using 76% smaller area than a fully parallel architecture. With dynamic precision control and clock gating to exploit algorithmic properties, the energy is reduced to 79.8pJ/b (or 2.49pJ/b per TX antenna).
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一个0.58mm2 2.76Gb/s 79.8pJ/b 256-QAM大规模MIMO消息传递检测器
设计了一种0.58mm2 40nm CMOS消息传递检测器(MPD),用于256-QAM大规模MIMO系统,每个时频资源支持32个并发移动用户。利用大规模MIMO中的信道强化,提出了一种符号强化技术,以最小的信噪比损失将MPD的复杂性降低60%以上。MPD采用4层双向交错架构,吞吐量为2.76Gb/s(平均4.9次迭代,信噪比为27dB,提前终止),面积比完全并行架构小76%。通过动态精确控制和时钟门控来利用算法特性,能量降低到79.8pJ/b(或每个TX天线2.49pJ/b)。
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