FEED-FORWARD LINEARIZATION WITHOUT PHASE SHIFTERS

摘要

A method and system for providing a finite impulse response, FIR, filter in a power amplification system are disclosed. An FIR filter includes a first signal path having a first delay, τ1. The first signal path is configured to receive an output from a power amplifier. A second signal path is in parallel with the first signal path has a second delay, τ2, and a first scalar multiplier, α1. A third signal path in parallel with the first and second signal paths has a third delay, τ3, and a second scalar multiplier, α2. The second and third signal paths are configured to receive a sum of the output of the power amplifier and a reference signal. Delays τ1, τ2, and τ3 are integer multiples of a period of time. An output is a sum of a signal from each of the first, second and third signal paths.

主权项

1. A finite impulse response, FIR, filter for a power amplification system, the FIR filter comprising:
a first signal path having a first delay, the first signal path configured to receive an output from a power amplifier; a second signal path in parallel with the first signal path, the second signal path having a second delay, and a first scalar multiplier, α1; a third signal path in parallel with the first and second signal paths, the third signal path having a third delay, and a second scalar multiplier, α2, the second and third signal paths configured to receive a sum of the output of the power amplifier and a reference signal, the first, second and third delays being integer multiples of a period of time; and an output that is a sum of a signal from each of the first, second and third signal paths.