Peak suppressing device and peak suppressing method

摘要

A peak suppressing device (10) includes: a subtracting unit (11) that subtracts a predetermined threshold from an amplitude value of an input signal and generates a first peak signal; a multiplying unit (12) that multiplies the first peak signal by a weight coefficient and generates a second peak signal; a band limiting filter (13) that limits a band of the second peak signal, and generates a third peak signal; a subtracting unit (14) that subtracts the third peak signal from the input signal; and a weight coefficient generating unit (15) that generates the weight coefficient based on a value, the value being an amplitude value of the first peak signal divided by an amplitude value of a fourth peak signal generated when a convolution arithmetic operation is performed on by using at least a tap coefficient used in a center tap of the band limiting filter (13).

主权项

1. A peak suppressing device comprising:
a first subtracting unit that subtracts a predetermined threshold from an amplitude value of an input signal and generates a first peak signal; a multiplying unit that multiplies the first peak signal by a weight coefficient and generates a second peak signal; a band limiting filter that limits a band of the second peak signal by including a plurality of tap coefficients, and generates a third peak signal; a second subtracting unit that subtracts the third peak signal from the input signal; and a weight coefficient generating unit that receives the first peak signal as a weight input signal and outputs the weight coefficient as a weight output signal, wherein the weight coefficient generating unit generates the weight coefficient based on an amplitude value of the weight input signal divided by an amplitude value of a fourth peak signal generated when a convolution arithmetic operation is performed on the weight input signal by using at least a tap coefficient used in a center tap of the band limiting filter and tap coefficients used as taps before and after the center tap.