Systems and methods of RF tower transmission, modulation, and amplification, including embodiments for compensating for waveform distortion
First Claim
1. A method of power transmission, modulation, and amplification including output waveform distortion compensation, comprising:
- receiving a frequency reference signal;
receiving information;
generating a plurality of control signals from said received information;
generating a plurality of substantially constant envelope signals using said frequency reference signal and said control signals;
amplifying and combining said substantially constant envelope signals to create an output signal; and
reducing waveform distortion in said output signal by reducing phase and amplitude errors in said output signal relative to a desired output signal.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
-
Citations
42 Claims
-
1. A method of power transmission, modulation, and amplification including output waveform distortion compensation, comprising:
-
receiving a frequency reference signal; receiving information; generating a plurality of control signals from said received information; generating a plurality of substantially constant envelope signals using said frequency reference signal and said control signals; amplifying and combining said substantially constant envelope signals to create an output signal; and reducing waveform distortion in said output signal by reducing phase and amplitude errors in said output signal relative to a desired output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. An apparatus for power transmission, modulation, and amplification, comprising:
-
input circuitry that receives information, and that generates a plurality of control signals from said received information; vector modulation circuitry, coupled to said input circuitry, that receives said control signals and a frequency reference signal, and that generates a plurality of substantially constant envelope signals using said frequency reference signal and said control signals; a power amplifier that receives said substantially constant envelope signals and amplifies and combines said substantially constant envelope signals to create an output signal; and means for reducing waveform distortion in said output signal by reducing phase and amplitude errors in said output signal relative to a desired output signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
Specification