A Constant Envelope OFDM Signal Generation Algorithm Based on Frequency Domain Noise Shaping

Qing Shui Gu; Chen Wei

doi:10.4028/www.scientific.net/AMM.602-605.3156

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 602-605A Constant Envelope OFDM Signal Generation...

A Constant Envelope OFDM Signal Generation Algorithm Based on Frequency Domain Noise Shaping

Abstract:

Presents a OFDM signal generation method which transforms general OFDM signal to constant envelope signal. Through out-of-band of original OFDM signal insertion synthetic noise signal, the composite signal in time domain is constant envelope, and in in-band can achieve a high signal-to-noise ratio. Simulations show that the method can be used in OFDM system to improve the efficiency of power amplifier. Simulations show that the method does not need too high sampling rate, at the same time there is no stability problems, compared to the high efficiency power amplifier based on time-domain Sigma-Delta modulation technology.

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Periodical:

Applied Mechanics and Materials (Volumes 602-605)

Pages:

3156-3159

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.602-605.3156

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Online since:

August 2014

Authors:

Qing Shui Gu*, Chen Wei

Keywords:

Constant Envelope, Frequency Domain Noise Shaping, OFDM, Power Amplifier, Sigma-Delta Modulation

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