Envelope control unit and digital modulator using the envelope c

Details Envelope control unit and digital modulator using the envelope c Envelope control unit and digital modulator using the envelope c

1995-05-30

1999-11-02

Pham, Chi H.

Pulse or digital communications

Transmitters

Antinoise or distortion

375298, 375308, 370215, 332103, 330 10, H04L 2503

Patent

active

059784210

ABSTRACT:
A power component of a transmission modulated wave generated by synthesizing a plurality of digital-modulated multi-carriers is calculated. Then, the envelope control unit of the present invention controls an envelope of the transmission modulated wave by outputting the transmission modulated wave as it is when the power component is smaller than a square value of a preset amplitude level, or suppressing the envelope of the transmission modulated wave at a preset suppression value in an amplitude direction.

REFERENCES:
patent: 4706262 (1987-11-01), Ohta
patent: 5111155 (1992-05-01), Keate et al.
patent: 5247542 (1993-09-01), Onodera et al.
patent: 5412352 (1995-05-01), Graham
patent: 5490172 (1996-02-01), Komara
patent: 5564087 (1996-10-01), Cygan et al.

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