Method of influencing an input signal and predistorter

Details Method of influencing an input signal and predistorter Method of influencing an input signal and predistorter

2007-04-10

2007-04-10

Nguyen, Khanh Van (Department: 2817)

Amplifiers

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

C330S002000

Reexamination Certificate

active

10853101

ABSTRACT:
The present invention relates to a method of influencing an input signal (x), in particular an input signal of a power amplifier of a wireless communication system, wherein said input signal (x) has a range of input amplitudes (r0, . . . , rM−1), wherein a correction signal (Γ(x)) depending on said input signal (x) is generated, and wherein said input signal (x) is influenced depending on said correction signal (Γ(x)).A generation of said correction signal (Γ(x)) is based on a plurality of base functions (φ1, φ2, . . . , φN−1), and said range of input amplitudes (r0, . . . , rM−1) is divided into intervals (r0,r1),(r1,r2), . . . ,(rM−2,rM−1), wherein each of said base functions (φ1, φ2, . . . , φN−1) contributes to said correction signal (Γ(x)) in a limited number of intervals ((r0,r1),(r1,r2), . . . ,(rM−2,rM−1)). Thus it is possible to change parts of the correction signal by adapting some of said base functions without influencing the whole correction signal.

REFERENCES:
patent: 6388513 (2002-05-01), Wright et al.
patent: 2 335 321 (1999-09-01), None
patent: WO 01/08295 (2001-02-01), None
Jae-Hee Han, Adaptive predistorter for power amplifier based on a real-time estimation of envelope transfer characteristics, Electronics Letters, IEE Stevenage, GB, vol. 35, No. 25, Dec. 9, 1999, pp. 2167-2168, XP006013057.
J. K. Cavers et al, “Optimum Table Spacing in Predistorting Amplifier Linearizers”, IEEE Transactions on Vehicular Technology, IEEE, NY, US, vol. 48, No. 5, Sep. 1999, pop. 1699-1705, XP000912539.
A. N. Andrea et al, “A digital approach to efficient RF power amplifier linearization”, Global Telecommunications Conference, 1997, Globecom '97, IEEE Phoenix, AZ, USA, Nov. 3-8, 1997, NY, NY, US, IEEE Nov. 1997, pp. 77-81, XP0102546257.

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