System and method for iterative nonlinear compensation for intermodulation distortion in multicarrier communication systems

摘要

A receiver is provided that can receive a first signal transmitted on a first carrier and a second signal transmitted on a second carrier. The receiver includes a channel estimation portion, a multicarrier nonlinear equalizer, a first log likelihood computing portion and a second log likelihood computing portion. The channel estimation portion can output a first estimation. The multicarrier nonlinear equalizer can output a first equalized signal and a second equalized signal. The first log likelihood ratio computing portion can output a first log likelihood ratio signal based on the first equalized signal. The second log likelihood ratio computing portion can output a second log likelihood ratio signal based on the second equalized signal. The multicarrier nonlinear equalizer can further output a third equalized signal and a fourth equalized signal. The third equalized signal is based on the first signal, the second signal and the first estimation. The fourth equalized signal is based on the first signal, the second signal and the first estimation.

主权项

1. A receiver operable to receive a first signal transmitted on a first carrier and to receive a second signal transmitted on a second carrier, said receiver comprising:
a channel estimation portion operable to output a first estimation; a multicarrier nonlinear equalizer operable to output a first equalized signal and a second equalized signal; a first log likelihood ratio computing portion operable to output a first log likelihood ratio signal based on the first equalized signal; a second log likelihood ratio computing portion operable to output a second log likelihood ratio signal based on the second equalized signal; wherein said multicarrier nonlinear equalizer is further operable to output a third equalized signal and a fourth equalized signal, wherein the third equalized signal is based on the first signal, the second signal and the first estimation, wherein the fourth equalized signal is based on the first signal, the second signal and the first estimation, wherein said first log likelihood ratio computing portion is operable to output a third log likelihood ratio signal based on the third equalized signal and the first log likelihood ratio signal, and wherein said second log likelihood ratio computing portion is operable to output a fourth log likelihood ratio signal based on the fourth equalized signal and the second log likelihood ratio signal.