Radio communications apparatus

Details Radio communications apparatus Radio communications apparatus

1995-07-13

1998-05-05

Tse, Young T.

Pulse or digital communications

Transmitters

Antinoise or distortion

375296, 455127, 330149, 332103, 332162, H03F 132

Patent

active

057486786

ABSTRACT:
A radio communications apparatus employs a training routine for optimizing performance and has a modulator (64, 66) to modulate a radio channel with digital information, to provide baseband signals (I, Q) at a first data rate. A power amplifier (36) amplifies signals fed from the modulator. A feedback loop (40, 42, 44, 30) samples the output signals of the power amplifier and adjusts at least one of the amplitude and phase of the baseband signals to compensate for distortion introduced by the power amplifier. The data rate of the baseband signals is reduced during the training routine to reduce adjacent channel transmissions.

REFERENCES:
patent: 3987374 (1976-10-01), Jones, Jr.
patent: 4890300 (1989-12-01), Andrews
patent: 5014285 (1991-05-01), Basile et al.
patent: 5179360 (1993-01-01), Suzuki
patent: 5222104 (1993-06-01), Medendorp
patent: 5559807 (1996-09-01), Van Den Heuvel et al.
patent: 5590418 (1996-12-01), Holoubek et al.
patent: 5602868 (1997-02-01), Wilson

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