Multiband digital predistorter

A system for digital predistortion of multiband signals, the system comprising:

• at least one communication module to receive a plurality of input signals respectively in multiple different frequency bands, the plurality of input signals occupying an input frequency span equal to a difference between a maximum frequency in a highest of the multiple different bands and a minimum frequency in a lowest of the multiple different bands;
• a frequency shifting circuit to frequency shift at least one signal from the plurality of input signals to produce condensed shifted signals, each corresponding to a respective one of the plurality of input signals, occupying a condensed frequency span smaller than the input frequency span;
• and
• a processor to process the condensed shifted signals, including to apply digital predistortion to the condensed shifted signals.

A non-transitory machine-readable medium storing a design structure comprising elements that, when processed in a computer-aided design system, generate a machine-executable representation of a multiband system that is used to fabricate hardware comprising:

• a receiving circuit to receive a plurality of input signals respectively in multiple different frequency bands, the plurality of input signals occupying an input frequency span equal to a difference between a maximum frequency in a highest of the multiple different bands and a minimum frequency in a lowest of the multiple different bands;
• a frequency shifting circuit to frequency shift at least one signal from the plurality of input signals to produce condensed shifted signals, each corresponding to a respective one of the plurality of input signals, occupying a condensed frequency span smaller than the input frequency span;
• and
• a processing circuit to process the condensed shifted signals, including to apply digital predistortion to the condensed shifted signals.

A non-transitory computer readable media programmed with a set of computer instructions executable on a processor, to:

• receive a plurality of input signals respectively in multiple different frequency bands, the plurality of input signals occupying an input frequency span equal to a difference between a maximum frequency in a highest of the multiple different bands and a minimum frequency in a lowest of the multiple different bands;
• frequency shift at least one signal from the plurality of input signals to produce condensed shifted signals, each corresponding to a respective one of the plurality of input signals, occupying a condensed frequency span smaller than the input frequency span;
• and
• process the condensed shifted signals, including apply digital predistortion to the condensed shifted signals.