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提出了一种性能优化的Benes网络结构作为开关网络用于WiMAX系统中的低密度奇偶校验码译码器.该网络结构在译码器的输入数目不是2的指数时,能获得最优化的性能.该网络结构是非阻塞的并且可以实现输入输出之间的任何排列组合,因此可以支持WiMAX系统中规定的19种模式.为了减少网络结构的硬件复杂度,提出一种用来产生该网络中所有2×2开关的控制信号的高效算法.同时,使用该高效算法可以减少整个网络的延时.结果表明,该控制信号的生成电路可以节省25.4%的芯片面积,并且总体网络的延时可以缩短36.2%.
A Benes network with optimized performance is proposed as a low-density parity-check code decoder for switch network in WiMAX system. This network structure can obtain the optimal value when the input number of the decoder is not an index of 2 Performance The network architecture is non-blocking and can achieve any permutations and combinations of inputs and outputs and thus supports the 19 modes specified in the WiMAX system.In order to reduce the hardware complexity of the network architecture, And all the 2 × 2 switch control signals.At the same time, the efficient algorithm can reduce the delay of the entire network.The results show that the control signal generation circuit can save 25.4% of the chip area, and the overall network delay can Shorten 36.2%.