Dynamic digital pre-distortion system

An apparatus for delaying a pre-distorted transmit signal of data samples at a given data rate prior to its transmission by a distorting element or distorting system, comprising:

• N parallel data paths being independently configurable to produce a delay of zero or one delay unit, wherein one delay unit is equal to a period of the given data rate multiplied by N;
• a first commutator coupled to the N parallel data paths and configured for routing successive data samples of the transmit signal to the N parallel data paths in a round-robin fashion, each of the N parallel data paths being independently configurable to produce a delay of zero or one delay unit, wherein one delay unit is equal to a period of the given data rate multiplied by N;
• an N×N crossbar coupled to the N parallel data paths and configured for connecting each of the N parallel data paths to N parallel data inputs of an N×N crossbar, the crossbar being configurable to route any of the N parallel data paths to any of N parallel data outputs of the crossbar;
• and
• a second commutator coupled to the N×N crossbar and configured for re-combining successive data samples from the N parallel data paths into a single data path to reconstitute the transmit signal;
• wherein the N parallel data paths and the crossbar are configurable to produce an effective delay at the reconstituted transmit signal of zero to N−1 periods of the given data rate.

A computer program product for delaying a pre-distorted transmit signal of data samples at a given data rate prior to its transmission by a distorting element or distorting system, and including one or more computer readable instructions embedded on a non-transitory computer readable storage medium and configured to cause one or more computer processors to perform the steps of:

• routing successive data samples of the transmit signal to N parallel data paths in a round-robin fashion, each of the N parallel data paths being independently configurable to produce a delay of zero or one delay unit, wherein one delay unit is equal to a period of the given data rate multiplied by N;
• connecting each of the N parallel data paths to N parallel data inputs of an N×N crossbar, the crossbar being configurable to route any of the N parallel data inputs to any of N parallel data outputs of the crossbar;
• re-combining successive data samples from the N parallel data paths into a single data path to reconstitute the transmit signal;
• and
• configuring the N parallel data paths and the crossbar to produce an effective delay at the reconstituted transmit signal of zero to N−1 periods of the given data rate.