Digital pre-distortion technique using non-linear filters

Details Digital pre-distortion technique using non-linear filters Digital pre-distortion technique using non-linear filters

2007-12-05

2009-10-20

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S297000, C375S254000, C455S063100, C330S002000, C330S149000

Reexamination Certificate

active

07606324

ABSTRACT:
A system, method and computer program product for stabilizing a coefficient set used by a digital predistortion (DPD) engine to apply pre-distortion to a transmit signal and cancel distortion generated by a distorting element or distorting system when transmitting the transmit signal, including obtaining an initial coefficient set; rotating the initial coefficient set to maintain a phase of fundamental components (w10(t), . . . , w1Q(t)) of the initial coefficient set a constant value; averaging the rotated coefficient set to obtain an averaged coefficient set; and applying the averaged coefficient set to the DPD engine.

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patent: 7035345 (2006-04-01), Jeckeln et al.
Lei Ding et al., “A Robust Digital Baseband Predistorter Constructed Using Memory Polynomials”, Manuscript submitted to theIEEE Trans. on Communication, Mar. 16, 2002, pp. 1-23.

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