Joel Richard Dierks

US Patent:

57323330, Mar 24, 1998

Filed:

Feb 14, 1996

Appl. No.:

8/601118

Inventors:

Charles Brian Cox - Quincy IL
David Kent Bonds - Quincy IL
Jay Jui-Chieh Chen - Vancouver, CA
Flaviu C. Costescu - Surrey, CA
Joel Richard Dierks - Quincy IL
Wayne Douglas Duello - Quincy IL
Thomas L. Frederick - Liberty IL
Paul A. Goud - Vancouver, CA
Derek Stephen Hilborn - Nepean, CA
Richard Johnathan Hinkle - Taylor MO
Terry Lee Hinkle - Lewistown MO
David E. Jones - Quincy IL
Theron Lee Jones - Quincy IL
Patricia Fern Kavanagh - Burnaby, CA
David W. Kroeger - Quincy IL
Robert Richard Leyendecker - Blaine WA
Vladimir Pavlovic - Vancouver, CA
Claudio Gustavo Rey - Coquitlam, CA
Ray M.R. Sewlochan - Vancouver, CA
Emre Tapucu - Burnaby, CA
Mark A. Walker - Palmyra MO

Assignee:

Glenayre Electronics, Inc. - Charlotte NC

International Classification:

H04B 104
H03F 126

US Classification:

455126

Abstract:

A linear transmitter (101) using predistortion includes a modulator (103), a predistorter (107), a digital quadrature modulator (111), an upconverter (113), a power amplifier (115), and an antenna (117). In addition, the transmitter (101) has a feedback loop including a coupler (119), a downconverter (123), a digital quadrature demodulator (125), and a trainer (131). The digital data to be transmitted is provided into the modulator (103), which converts the digital data into in-phase and quadrature component signals. The in-phase and quadrature component signals are then provided to the predistorter (107), which "predistorts" the component signals prior to amplification. The digital quadrature modulator (111) converts the component signals into a single analog signal. The upconverter (113) upconverts this signal from the predistorter (107) into the desired frequency of transmission, which is provided to the power amplifier (115) and the antenna (117) for amplification and broadcast. The coupler (119) provides a portion of the amplified signal to the analog downconverter (123), which lowers the frequency of this signal to a range that is easily processed.