Patent ID: 9621236
Date: 2017-04-11
CPC Classifications: H04B,H04L

Claim:
1. A method for multiple-input multiple-output impairment pre-compensation in a multiple-input and multiple-output transmitter having a multiple-input multiple-output radio frequency (RF) power amplifier, comprising: receiving at the multiple-input and multiple-output transmitter a plurality of input signals forming a multiple-input signal; generating a pre-distorted multiple-input signal from the received multiple-input signal; generating a multiple-output signal by feeding the pre-distorted multiple-input signal into the multiple-input and multiple-output transmitter; estimating impairments generated by nonlinear crosstalk in the multiple-input and multiple-output RF power amplifier, the nonlinear crosstalk being generated between respective channels of the multiple-input and multiple-output RF power amplifier while being driven by the plurality of input signals; and adjusting the pre-distorted multiple-input signal to compensate for the estimated impairments.