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首页> 外文会议>Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on >Implementation of bit-parallel lattice wave digital filters with increased maximal sample rate
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Implementation of bit-parallel lattice wave digital filters with increased maximal sample rate

机译：最大采样率提高的位并行晶格波数字滤波器的实现

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摘要

Arithmetic transformations for increased maximal sample rate of bit-parallel lattice wave digital filters implemented with carry-save arithmetic are proposed. The purpose is to increase the throughput in order to allow a reduction of the power consumption through supply voltage scaling. A lattice wave digital filter can be composed of first- and second-order allpass sections which are recursive structures. This sets a bound on the maximal sample rate. The proposed transformations reduce the latency of the critical loop by reordering of arithmetic operations. The resulting structure is numerically equivalent to the original structure. Hence, the favourable properties of lattice wave digital filters, such as guaranteed stability, low coefficient sensitivity, and good dynamic range, are retained. An example of a filter implementation where the proposed transformations are applied is presented. The maximal sample rate for this example was improved by about 40% at the expense of a 10% increase of the area.
机译：提出了采用进位保存算法实现的比特并行晶格波数字滤波器最大采样率提高的算术变换。目的是增加吞吐量，以允许通过电源电压缩放来降低功耗。晶格波数字滤波器可以由作为递归结构的一阶和二阶全通部分组成。这为最大采样率设置了界限。所提出的变换通过对算术运算进行重新排序来减少关键循环的等待时间。所得的结构在数值上等效于原始结构。因此，保留了晶格波数字滤波器的有利特性，例如保证的稳定性，低系数灵敏度和良好的动态范围。给出了应用建议的变换的过滤器实现的示例。此示例的最大采样率提高了约40％，但面积增加了10％。

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