To provide a peak suppression circuit capable of reducing a circuit scale of band limit of impulse signal, while improving adjacent channel leakage power ratio when peak signal having power being higher than average power is suppressed.
A peak suppression circuit L comprises: a peak signal detection part 4 for detecting peak signal having a peak intensity being larger than intensity threshold, in multi-carrier signal; an impulse signal generation part 5 for generating impulse signal at peak time of the peak signal detected by the peak signal detection part 4; a complex FIR filter part 13 for performing the band limit on the impulse signal generated from the impulse signal generation part 5 within a range of band of each of single carrier signals forming the multi-carrier signal; and a peak signal suppression circuit 10 for subtracting the impulse signal after the band limit in the complex FIR filter part 13 from the multi-carrier signal and suppressing the peak signal in the multi-carrier signal.
HIRAYAMA HIROHISA
SASAKI TAKAYOSHI
| JP2010050765A | 2010-03-04 | |||
| JP2010226589A | 2010-10-07 |
| WO2010074187A1 | 2010-07-01 |
Katsuhiro Imashita