07724840 is referenced by 8 patents and cites 86 patents.

An RF transmitter (10) includes a linear predistorter (22) and a nonlinear predistorter (24) which together drive analog transmitter components (14). The linear and nonlinear predistorters (22, 24) are implemented using a collection of adaptive equalizers (30). A feedback signal (20) is developed by downconverting an RF communication signal (16) obtained from the analog components (14). The feedback signal (20) are used in driving tap coefficients (34) for the adaptive equalizers (30′, 30″) in the nonlinear predistorter (24). An intermodulation-product canceller (94) uses signal cancellation to cancel intermodulation products from the feedback signal (20) and generate an intermodulation-neutralized feedback signal (96). The intermodulation-neutralized feedback signal (96) is used along with a modulated convergence factor (43) in driving tap coefficients (34) for the adaptive equalizer (30) in the linear predistorter (22).

Title
RF transmitter with predistortion and method therefor
Application Number
11/641914
Publication Number
7724840 (B2)
Application Date
December 19, 2006
Publication Date
May 25, 2010
Inventor
Eric M Brombaugh
Mesa
AZ, US
Ronald Duane McCallister
Scottsdale
AZ, US
Agent
Meschkow & Gresham
Assignee
Crestcom
AZ, US
IPC
H04L 27/36
H04L 25/03
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