Pipelined digital predistorter for a wideband amplifier

Details Pipelined digital predistorter for a wideband amplifier Pipelined digital predistorter for a wideband amplifier

1995-11-28

1997-07-22

Mottola, Steven

Amplifiers

Hum or noise or distortion bucking introduced into signal...

H03F 126

Patent

active

056507585

ABSTRACT:
An apparatus for linearizing the output of a wideband amplifier by digitally predistorting the input to the amplifier in a way that just compensates for the distortion in the amplified signal, comprising a pipeline controller (12), for providing pipeline controller signals, and a pipelined predistorter (11), consisting of several stations, serially connected to each other, wherein each station performs one or more tasks concurrently, under the direction of the pipeline controller (12). The result is a digital predistorter with a bandwidth large enough to linearize, by itself, the entire output of a wideband amplifier. More generally, an apparatus for linearizing a wideband amplifier by using digital signal processing performed using a pipeline architecture, as opposed to using a sequential processing architecture, under the supervision of a pipeline controller.

REFERENCES:
patent: 5123031 (1992-06-01), Kuisma
patent: 5266906 (1993-11-01), Inahashi
patent: 5351016 (1994-09-01), Dent
patent: 5485120 (1996-01-01), Anvari
"Adaptive Linearisation Using Pre-Distortion" by Michael Faulkner, IEEE CH 2846-Apr. 1990, pp. 35-40.
"Linear Amplication for Digital Mobile Communications" by Yoshinori Nagata, IEEE CH 2379-Jan. 1989, pp. 159-164.
"Digital Modulation/Demodulation Techniques for Mobile Radio Communications in Japan", The Transactions of the Institute of Electronics & Communications Engineers of Japan, Section E., vol. E74 No. 6, Jun. 1991, pp. 1503-1511, Tokyo, Japan.

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