Method and system for baseband predistortion linearization in multi-channel wideband communication systems

A system for reducing adjacent channel power ratio and compensating memory effects of multi-channel wideband communication systems using multiplexing modulation techniques, the system comprising:

• an address generator for generating an address form samples of a baseband input signal of a communication system;
• a memoryless lookup table having therein coefficients addressable according to the address;
• a multiplier for combining the baseband input signal and the coefficients;
• lookup table entry;
• and
• an equalizer for pre-equalizing the multiplier to compensate for memory effects in a power amplifier of the communications system, the pre-equalizing depending on one or more magnitudes of the input signal,
• wherein the pre-equalization comprises multiplying a magnitude of a first delayed version of the input signal with a magnitude of a second delayed version of the input signal and further with a cross-term pre-equalizing coefficient.

A method of reducing adjacent channel power ratio and compensating memory effects of multi-channel wideband communication systems using multiplexing modulation techniques, the method comprising:

• generating an address from samples of a baseband input signal of a communication system;
• retrieving from a memoryless lookup table an entry in accordance with the address;
• pre-equalizing the baseband input signal, the pre-equalization depending on a present value of the input signal and one or more delayed values of the input signal;
• and
• multiplying the pre-equalized baseband input signal and the lookup table entry,
• wherein the pre-equalization comprises multiplying a first delayed value of the one or more delayed values of the input with a second delayed value of the one or more delayed values of the and further with a cross-term pre-equalizing coefficient.