Power control using fast signal time alignment

摘要

A method for controlling output signal power in a communication terminal includes accepting, from first and second measurement points along a transmission chain in a transmitter of the terminal, respective first and second signal representations of a communication signal to be transmitted by the communication terminal. A cross-correlation is computed between the first and second signal representations accepted from the first and second measurement points. An actual gain between the first and second measurement points is computed using the cross-correlation. An output power of the communication signal is adjusted by setting a gain of the transmitter responsively to the actual gain.

主权项

1. A method for controlling output signal power in a communication terminal, the method comprising:
accepting, from first and second measurement points along a transmission chain in a transmitter of the terminal, respective first and second signal representations of a communication signal to be transmitted by the communication terminal; selecting whether to route the first and second signal representations to a first processing path that detects respective first and second envelopes of the first and second signal representations, or to a second processing path that does not apply envelope detection to the first and second signal representations; time-aligning the first and second signal representations, or the first and second envelopes, depending on the selected processing path; computing an actual gain between the first and second measurement points using the time-aligned first and second signal representations or first and second envelopes; and adjusting an output power of the communication signal by setting a gain of the transmitter responsively to the actual gain.