FILTER COEFFICIENT CALCULATION DEVICE, SIGNAL GENERATION DEVICE PROVIDED WITH THE SAME, FILTER COEFFICIENT CALCULATION METHOD, AND SIGNAL GENERATION METHOD

摘要

To provide a filter coefficient calculation device capable of calculating filter coefficients of an FIR filter having a relatively large number of taps at high speed and realizing a plurality of functions.SOLUTION: A filter coefficient calculation device 30 includes a function unit 40 having a plurality of functions to be executed by an FIR filter 12, a function selection unit 51 that selects one or more functions from the plurality of functions, and a filter coefficient calculation unit 52 that calculates filter coefficients in one or more selected functions, and the function unit 40 includes a first transfer function calculation unit 41a that calculates a transfer function of the FIR filter 12 in each of the functions, a second transfer function calculation unit 42a, and a third transfer function calculation unit 43a, and the filter coefficient calculation unit 52 obtains an impulse response of the FIR filter 12 by inverse Fourier transforming a transfer function in the selected function or products of transfer functions in the plurality of functions to calculate the impulse response as a filter coefficient.SELECTED DRAWING: Figure 3