TIME ALIGNMENT ALGORITHM FOR TRANSMITTERS WITH EER/ET AMPLIFIERS AND OTHERS
First Claim
1. A method for amplifying a transmission signal by a non-linear power amplifier, the method comprising:
- capturing an input signal and a feedback signal;
determining a first time delay between the input signal and the feedback signal;
determining a second time delay between the input signal and the feedback signal, the determination of the second time delay having a higher resolution than the determination of the first time delay; and
applying the first time delay and the second time delay to temporally align the input signal with the feedback signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus and method for aligning input and feedback signals in a transmission circuit are provided. The method includes capturing an input signal and a feedback signal, determining a first time delay between the input signal and the feedback signal, determining a second time delay between the input signal and the feedback signal, the determination of the second time delay having a higher resolution than the determination of the first time delay, and applying the first time delay and the second time delay to temporally align the input signal with the feedback signal. Use of the present invention provides an improved resolution of time alignment while reducing the overall complexity and cost of the transmission circuit.
-
Citations
24 Claims
-
1. A method for amplifying a transmission signal by a non-linear power amplifier, the method comprising:
-
capturing an input signal and a feedback signal; determining a first time delay between the input signal and the feedback signal; determining a second time delay between the input signal and the feedback signal, the determination of the second time delay having a higher resolution than the determination of the first time delay; and applying the first time delay and the second time delay to temporally align the input signal with the feedback signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An apparatus for amplifying a transmission signal, the apparatus comprising:
-
a controller for capturing an input signal and a feedback signal, for determining a first time delay between the input signal and the feedback signal, and for determining a second time delay between the input signal and the feedback signal, the determination of the second time delay having a higher resolution than the determination of the first time delay; a first integer delay for applying the first time delay; and a first fractional delay for applying the second time delay, wherein the first integer delay and the first fractional delay respectively apply the first time delay and the second time delay to temporally align the input signal with the feedback signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification