US 9,813,273 B2
Peak suppression device
Hiroyoshi Ishikawa, Kawasaki (JP); Toshio Kawasaki, Kawasaki (JP); Hikaru Ishikawa, Kawasaki (JP); and Kazuo Nagatani, Yokohama (JP)
Assigned to FUJITSU LIMITED, Kawasaki (JP)
Filed by FUJITSU LIMITED, Kawasaki-shi, Kanagawa (JP)
Filed on Sep. 23, 2015, as Appl. No. 14/862,557.
Claims priority of application No. 2014-215602 (JP), filed on Oct. 22, 2014.
Prior Publication US 2016/0119172 A1, Apr. 28, 2016
Int. Cl. H04L 27/26 (2006.01); H04L 25/03 (2006.01); H04L 25/49 (2006.01)
CPC H04L 27/2624 (2013.01) [H04L 25/03834 (2013.01); H04B 2201/70706 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A peak suppression device using an impulse signal for a multicarrier signal, the peak suppression device comprising:
a memory; and
a processor configured to be coupled to the memory, wherein
the processor executes a process comprising:
acquiring a first envelope and a second envelope of a first carrier signal and a second carrier signal that are included in the multicarrier signal, the first envelope corresponding to the first carrier signal and the second envelope corresponding to the second carrier signal;
adding the first and second envelopes to generate a combined envelope;
detecting peak timings from consecutive peaks larger than a target value by using the combined envelope, the consecutive peaks being generated by the multicarrier signal;
calculating a difference value between an amplitude value at each of the detected peak timings and the target value;
generating first and second impulse signals depending on the difference value, the first impulse signal being adjusted for a phase according to the first carrier signal, the second impulse signal being adjusted for a phase according to the second carrier signal; and
suppressing the first carrier signal using the first impulse signal and suppressing the second carrier signal using the second impulse signal.