Method and system for baseband predistortion linearization in multi-channel wideband communication systems
AssigneeDali Systems Co. Ltd.
InventorsWan-Jong Kim, Kyoung Joon Cho, Jong Heon Kim, Shawn Patrick Stapleton
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Abstract
An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup table based predistortion, which is a cascade of a lookup table predistortion and piecewise pre-equalizers.
Claims17
(canceled)
A method of reducing adjacent channel power ratio in a multi-channel wideband communication system, the method comprising:
- generating a pre-distorted input signal by multiplying a baseband input signal and a polynomial predistortion coefficient;
- and
- pre-equalizing the pre-distorted input signal using one or more polynomial pre-equalization coefficients, the one or more polynomial pre-equalization coefficients corresponding to memory effects in a power amplifier of the communication system.
A system for reducing adjacent channel power ratio in a multi-channel wideband communication system, the system comprising:
- a multiplier for combining a baseband input signal and a polynomial predistortion coefficient;
- and
- an equalizer for pre-equalizing an output of the multiplier using one or more polynomial pre-equalization coefficients to compensate for memory effects in a power amplifier of the communication system.
Dependencies are inferred from the claim text.