Spectrally Precoded DFT-Based OFDM and OFDMA With Oversampling

Spectrally precoded orthogonal frequency-division multiplexing (SP-OFDM) and SP-OFDM multiple access (SP-OFDMA) are bandwidth-efficient rectangularly pulsed multicarrier signaling formats that can provide power spectral sidelobes decaying asymptotically as f -2L-2 , with L being a preassigned positi...

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Vydané v:IEEE transactions on vehicular technology Ročník 63; číslo 6; s. 2769 - 2783
Hlavní autori: Wu, Tsung-Wei, Chung, Char-Dir
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York, NY IEEE 01.07.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Algorithms
Applied sciences
Approximation
Asymptotic properties
Circuit properties
Decay
Discrete Fourier transform
Discrete Fourier transforms
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Fourier transforms
Frequency-domain analysis
Indexes
Information, signal and communications theory
Mathematical analysis
Multiplexing
Orthogonal Frequency Division Multiplexing
orthogonal frequencydivision multiple access
Oversampling
Passband
Peak to average power ratio
Signal and communications theory
Signal convertors
Spectra
spectral precoding
Switching and signalling
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Vectors
Waveforms
Discrete Fourier transform (DFT)
orthogonal frequency-division multiple access (OFDMA)
spectral precoding
orthogonal frequency-division multiplexing (OFDM)
oversampling
Performance evaluation
Waveform
Lateral lobe
Multiple access
Design criterion
Coding circuit
Spectral properties
Multicarrier
Peak to average power ratio
Discrete Fourier transformation
Frequency division multiple access
Compact design
Oversampling
Signalling
Coding
Diagonal matrix
Orthogonal frequency division multiplexing
Pretreatment
Power spectrum
ISSN:0018-9545, 1939-9359
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Shrnutí:Spectrally precoded orthogonal frequency-division multiplexing (SP-OFDM) and SP-OFDM multiple access (SP-OFDMA) are bandwidth-efficient rectangularly pulsed multicarrier signaling formats that can provide power spectral sidelobes decaying asymptotically as f -2L-2 , with L being a preassigned positive-integer design parameter, which results in a compact spectrum. The existing spectral precoders for SP-OFDM and SP-OFDMA are designed based on the rectangularly pulsed analog multicarrier waveform representation that has an unlimited power spectrum; thus, the corresponding waveforms cannot be exactly synthesized in a discrete Fourier transform (DFT) structure. Consequently, these spectral precoders are subject to modification in DFT-based OFDMA and OFDM systems in which signaling waveforms are digitally synthesized with the use of DFT and provide discrete approximation embodiments to analog multicarrier waveform counterparts. In this paper, a general constraint on spectral precoding and the corresponding spectral precoders are developed for DFT-based OFDMA and OFDM with oversampling to ensure the desirable spectral property that the resultant spectrally precoded DFT-based waveforms provide powerspectral-sidelobe envelope bounds decaying asymptotically as f -2L-2 . It is analytically shown that the precoders suitable to DFT-based waveforms can be simply obtained by properly transforming the previously designed precoders suitable to corresponding analog multicarrier waveforms with an appropriate diagonal phase-rotation matrix, while yielding similar spectral performance and peak-to-average power ratio (PAPR) characteristics.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2013.2292877