| 摘要 |
PROBLEM TO BE SOLVED: To enable a currently available DSP to process a process quantity by greatly reducing the quantity by regarding as specific constants the tap coefficient of a finite impulse response(FIR) filter and one-unit delay when the tap length of the FIR filter is even and representing a transfer function by a specific expression. SOLUTION: This system comprises delay means 26 to 28 and 33 to 36 which delay an input x(nT) in order, subtracting means 29 to 32 which subtract inputs or the outputs of the delay means, multiplying means 37 to 40 which multiply the outputs of the subtracting means 29 to 32 by a transfer function h(k) for Hilbert transformation, and an adding means 41 which adds all the outputs of the multiplying means 37 to 40. Then when the impulse response of the FIR filter is symmetrical about the center, the degree N of the filter is divided into even and odd cases; when the tap length N of the FIR filter is even, the transfer function H(Z) of the FIR filter is represented by the expression by regarding h(k) as the tap coefficient of the FIR filter and z-1 as one-unit delay of the FIR filter.
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