Generic Permutation Network for QC-LDPC Decoder
Generic Permutation Network for QC-LDPC Decoder
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DOI：
10.1587/transfun.e93.a.2551
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
Xiao Peng;Xiongxin Zhao;Zhixiang Chen;F. Maehara;S. Goto
中科院分区：
文献类型：
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作者：
Xiao Peng;Xiongxin Zhao;Zhixiang Chen;F. Maehara;S. Goto
对于大多数具有多种码率和各种码长的现代无线通信系统，置换网络在可重构QC-LDPC解码器中发挥着重要作用。本文提出了用于可重构 QC-LDPC 解码器的通用排列网络（GPN）。与传统的排列网络相比，该方案可以突破输入数量限制，例如2的幂和其他有限数量，并针对任何需要的应用优化网络。此外，由于级数较少和有效的控制信号生成算法，所提出的方案可以大大减少延迟。此外，所提出的网络处理高并行性的性质，可以使多组数据同时循环移位。使用90 nm技术的综合结果表明，该架构可以在600 MHz频率下以18.3k的门数实现WiMAX标准，以10.9k的门数实现在800 MHz频率下的WiFi标准。
Permutation network plays an important role in the reconfigurable QC-LDPC decoder for most modem wireless communication systems with multiple code rates and various code lengths. This paper presents the generic permutation network (GPN) for the reconfigurable QC-LDPC decoder. Compared with conventional permutation networks, this proposal could break through the input number restriction, such as power of 2 and other limited number, and optimize the network for any application in demand. Moreover, the proposed scheme could greatly reduce the latency because of less stages and efficient control signal generating algorithm. In addition, the proposed network processes the nature of high parallelism which could enable several groups of data to be cyclically shifted simultaneously. The synthesis results using the 90 nm technology demonstrate that this architecture can be implemented with the gate count of 18.3k for WiMAX standard at the frequency of 600 MHz and 10.9k for WiFi standard at the frequency of 800 MHz.