Statistical modeling of cross modulation in multichannel power amplifiers using a new behavioral modeling technique

A statistically based analysis technique is developed for multichannel amplifier environments enabling in-band and out-of-band intermodulation and cross modulation distortions to be predicted with very little computation. This is coupled with the introduction of a multiple envelope behavioral modeling technique that captures the black box characteristics of multichannel amplifiers. A CDMA two channel amplifier with a two-channel signal is characterized experimentally and verifies the approach presented here.