08185065 is referenced by 12 patents and cites 35 patents.

A transmitting unit (12) clips a communication signal (14) to form a threshold-responsive signal (36, 36′) which includes in-band distortion (40) and out-of-band distortion (38). A portion of the out-of-band distortion (38) is notched within rejection bands (48, 50) adjacent to the communication signal's bandwidth (24). But remaining portions of the out-of-band distortion (38) and portions of the in-band distortion (40) are included with the communication signal (14). The remaining portion of the out-of-band distortion (38) causes the communication signal (14) to be in violation of a spectral mask (30). The mask-violating communication signal 14 with out-of-band distortion (38) and in-band distortion (40) is amplified by an RF power amplifier (22). After amplification, a bandpass filter (92) exhibiting fast rolloff regions (110) attenuates the amplified out-of-band distortion (38) causing compliance with the spectral mask (30).

Title
Transmitting unit that reduces PAPR using out-of-band distortion and method therefor
Application Number
12/580069
Publication Number
8185065 (B2)
Application Date
October 15, 2009
Publication Date
May 22, 2012
Inventor
Eric M Brombaugh
Mesa
AZ, US
Ronald Duane McCallister
Scottsdale
AZ, US
Agent
Meschkow & Gresham
Assignee
CrestCom
AZ, US
IPC
H04B 1/16
View Original Source