基于概率计算的数字滤波器的实现

The Implementation of Digital Filter based on Stochastic Computation

本文提出了一种基于概率计算的低功耗数字滤波器实现方法。首先对传统滤波器的算法进行改进,使其映射到概率域中。其次提出了算法所对应的硬件结构,给出了串行和部分并行的基于概率计算的实现结构。分析了其与传统滤波器信噪比及功耗的性能。所提出的概率计算的滤波器结构更简单,容错性更强。因此其更适用于低信噪比、低开销的环境中。

A lowpower digital filter based on stochastic computation is proposed,in which the traditional digital filter algorithm is improved to be mapped to the probability field.The serial and part parallel structures are proposed based on the probability digital filter algorithm.The signal to noise ratio（SNR） is also analyzed.The filter based on stochastic computation has simple hardware structure,and more error tolerant.The proposed stochastic filter can be applied in the lowSNR and lowhardware cost field.