Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
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.
Bar-Ness Yeheskel
Tan Mizhou
Connolly Bove & Lodge & Hutz LLP
New Jersey Institute of Technology
Tran Khai
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