Abstract: A concurrent multi-band linearized transmitter (CMLT) has a concurrent digital multi-band predistortion block (CDMPB) and a concurrent multi-band transmitter (CMT) connected to the CDMPB. The CDMPB can have a plurality of digital baseband signal predistorter blocks (DBSPBs), an analyzing and modeling (A&M) stage, and a signal observation feedback loop. Each DBSPB can have a plurality of inputs, each corresponding to a single frequency band of the multi-band input signal, and its output corresponding to a single frequency band; each output connect corresponding to an input of the CMLT. The A&M stage can have a plurality of outputs connected to and updating the parameters of the DBSPBs, and a plurality of inputs connected to either both outputs of the signal observation loop or the output of the subsampling loop and to outputs of the DBSPBs. The A&M stage can perform signals' time alignment, reconstruction of signals and compute parameters of DBSPBs.

Abstract: A method of linearizing a transmitter, including applying an input signal to a transmission path of the transmitter to produce output signals, forming a plurality of distinct transformation functions deployed to operate in parallel in the transmission path, each of the distinct transformation functions being based on estimated impairments in the transmission path, wherein inputs to each of the distinct transformation functions include multiple separate signals, each of which are formed from the input signal. The method further includes generating, in parallel, a plurality of transformed signals from each of the distinct transformation functions and providing predistortion signals to the transmission path for the linearizing of the transmitter by using the transformed signals.