| 摘要 |
PROBLEM TO BE SOLVED: To provide a distortion compensation device that effectively reduces a distortion in a wide band of an output signal of an amplifier.SOLUTION: A distortion compensation device 4 includes a distortion compensation processing section 8, an amplifier characteristic estimation section 51 and an estimation section 7. Here, a monitor band of a digital monitor signal r[nd], r[nd] given to the amplifier characteristic estimation section 51 is narrower than a band of a compensation signal u[n], u[n]. Specifically, the amplifier characteristic estimation section 51 generates a signal component included in an analog monitor signal which is outside the monitor band on the basis of the compensation signal u[n], u[n], and adds the generated signal component outside the monitor band to the digital monitor signal r[nd], r[nd] to generate a restoration signal y[n], y[n]. |
