Digital method of correcting non-linearity in a transmission cha

Details Digital method of correcting non-linearity in a transmission cha Digital method of correcting non-linearity in a transmission cha

1990-10-05

1992-04-14

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

332160, 330149, H04L 2549

Patent

active

051054469

ABSTRACT:
The invention provide a digital method of correcting non-linearity in a transmission chain, in which the effects of amplifier non-linearities are compensated by applying predistortion in baseband prior to modulation, with the signal being processed digitally in real time. The invention also provides apparatus for implementing the method. The invention is particularly applicable to radio beams for conveying digital signals.

REFERENCES:
patent: 4291277 (1981-09-01), Davis et al.
patent: 4462001 (1984-07-01), Girard
patent: 4554514 (1985-11-01), Whartenby et al.
patent: 4700151 (1987-10-01), Nagata
patent: 4801899 (1989-01-01), Ashida
patent: 4890301 (1989-12-01), Hedberg
patent: 4908840 (1990-03-01), Kakimoto
patent: 4930141 (1990-05-01), Ohmagari
ICC '80--International Conference on Communications, Seattle, US, Jun. 8-12, 1980, vol. 2, IEEE, New York, USA, pp. 158-162; R. P. Hecken et al.: "Predistortion linearization of the AR 6A Transmitter".
GLOBECOM '85--IEEE Global Telecommunications Conference, New Orleans, USA, Dec. 2-5, 1985, vol. 3, IEEE, New York, USA, pp. 1466-1470; T. Nojima et al.: "The Design of a Predistortion Linearization Circuit for high-Level Modulation Radio Systems".

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