Loop delay and gain control methods in closed-loop...

Details Loop delay and gain control methods in closed-loop... Loop delay and gain control methods in closed-loop...

2011-08-16

2011-08-16

Payne, David C. (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

Reexamination Certificate

active

08000408

ABSTRACT:
Embodiments include transmitters, wireless devices, and methods for performing loop delay and gain control. In a transmitter, a gain application element receives and combines digital input samples and a digital gain signal to generate gain-compensated digital samples. A power amplifier receives and amplifies an analog version of the gain-compensated digital samples to generate an antenna output signal. A feedback path generates an analog feedback signal from the antenna output signal, to produce a sequence of digital feedback samples from the analog feedback signal, and generates the digital gain signal from the sequence of digital feedback samples and a loop gain estimate. A loop delay and gain calculator calculates a loop delay estimate from the gain-compensated digital samples and the sequence of digital feedback samples, and calculates the loop gain estimate using the loop delay estimate, the gain-compensated digital samples, and the sequence of digital feedback samples.

REFERENCES:
patent: 7215972 (2007-05-01), Premakanthan
patent: 2002/0186783 (2002-12-01), Opas et al.
patent: 2006/0223463 (2006-10-01), Rahman et al.
patent: 2007/0249283 (2007-10-01), Braithwaite

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