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This paper presents a low-cost and high-performance programmable digital finite impulse response (FIR) filter. The architecture employs the computation sharing algorithm to reduce the computation complexity. In the traditional computation sharing algorithm, critical path constraint on the output summation stage is a bottleneck, thus, the canonic-si...
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... Adder : In the S&A, the Final Adder sums the five partial products and is the critical path in the architecture. Therefore, we improve the Final Adder by using Wallace tree and look-ahead adder structure, which is shown in Figure 6, in order to reduce delay in the critical path. In the our CSHM architecture, the sign bit of coefficient C is used to transform the sign of the Final Adder output, the other bits are used for transforming CSD_C. ...
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