OFDM peak-to-average power ratio reduction by combined...

Details OFDM peak-to-average power ratio reduction by combined... OFDM peak-to-average power ratio reduction by combined...

2008-05-20

2008-05-20

Tran, Khai (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C370S208000

Reexamination Certificate

active

10989895

ABSTRACT:
A signal scrambling method based on combined symbol rotation and inversion (CSRI) for the peak-to-average power ratio (PAPR) reduction of OFDM signals. By dividing OFDM sequences into subblocks and performing symbol rotation and inversion in each subblock, high degrees of freedom are available to offset the possibility of encounting poor sequences with large PAPR. In order to reduce the complexity of this scheme, two suboptimal CSRI schemes are disclosed, one based on a successive approach combined with symbol grouping, and the other based on a random approach combined with threshold control.

REFERENCES:
patent: 2004/0190640 (2004-09-01), Dubuc et al.

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