Patent ID: 9118285
Filing Date: 2015-08-25
Classification: H03F,H04B,H04L

Abstract:
1. A method of providing gain and phase offsets for compensating phase and gain distortions of a transmitter analog front end, the method comprising: generating a single complex tone signal, wherein the generating comprises compensating a signal gain and a phase with gain and phase offsets; sending the compensated single complex tone signal to the transmitter analog front end; receiving an output signal corresponding to the compensated single complex tone signal from a receiver analog front end; filtering the received output signal to isolate an inter-modulation signal, which is indicative of distortions introduced by the transmitter analog front end; measuring a first power of the filtered output signal; updating the gain and phase offsets, and repeating the generating, sending, receiving, filtering and measuring steps above; measuring a second power of the filtered output signal after the updating; comparing the first measured power with the second measured power; and selecting the gain and phase offsets associated with the lowest among first measured power and the second measured power.