Peak-to-average power reduction for FM OFDM transmission

Details Peak-to-average power reduction for FM OFDM transmission Peak-to-average power reduction for FM OFDM transmission

2004-02-02

2009-06-02

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S229000, C375S260000

Reexamination Certificate

active

07542517

ABSTRACT:
A method of reducing peak-to-average power ratio in an OFDM signal comprises the steps of modulating a set of subcarriers with a set of data symbol vectors to produce a first modulated signal, limiting the magnitude of the first modulated signal to produce a first limited modulated signal, demodulating the first limited modulated signal to recover distorted input symbol vectors, constraining the distorted input symbol vectors to values greater than or equal to a minimum threshold value to produce constrained data symbol vectors, constraining out-of-band spectral components to lie within a predetermined mask, and remodulating the constrained data symbol vectors. A transmitter that performs the method is also included.

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