Patent ID: 8355682
Filing Date: 2013-01-15
Classification: H03F,H04B

Abstract:
1. A radio transmitter comprising: at least two transmit paths; a common baseband digital input signal applied to the least two transmit paths; a combiner connected to the at least two transmit paths for combining modified transmit signals on the at least two transmit paths to form a combined signal; a power amplifier for receiving and power amplifying the combined signal resulting in an amplified combined signal; at least one feedback path for sampling the amplified combined signal; at least two baseband digital predistortion elements connected to the at least one feedback path and adapted to produce at least two individual baseband digital predistortion functions for modification of the transmit signals in the at least two frequency bands to produce the modified transmit signals on the at least two transmit paths, resulting in a corrected amplified combined signal.