Eigenvalue-Decomposition-Precoded Ultra-Dense Non-Orthogonal Frequency-Division Multiplexing

This paper proposes a novel ultra-dense non-orthogonal frequency-division multiplexing (NOFDM) transmission, where subcarrier spacing is set significantly lower than that of orthogonal frequency-division multiplexing (OFDM). In order to eliminate the detrimental effects of NOFDM-specific inter-carri...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2020-12, Vol.19 (12), p.8165-8178
Main Authors: Osaki, Seichiroh, Ishihara, Takumi, Sugiura, Shinya
Format: Article
Language:English
Subjects:
Bandwidth
Capacity
Codes
Decomposition
eigenvalue decomposition
Eigenvalues
Eigenvalues and eigenfunctions
faster-than-Nyquist signaling
Frequency division multiplexing
information rate
information-theoretic analysis
Interference
non-orthogonal frequency-division multiplexing
OFDM
Orthogonal Frequency Division Multiplexing
power allocation
Resource management
spectrally efficient frequency-division multiplexing
Subcarriers
truncation
Wireless communication
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Summary:This paper proposes a novel ultra-dense non-orthogonal frequency-division multiplexing (NOFDM) transmission, where subcarrier spacing is set significantly lower than that of orthogonal frequency-division multiplexing (OFDM). In order to eliminate the detrimental effects of NOFDM-specific inter-carrier interference and correlated additive noises, eigenvalue-decomposition-aided precoding is conceived. The classical capacity formula is extended to one supporting our precoded NOFDM scheme. Optimal power allocation (PA) is developed in order to maximize the derived capacity of the proposed scheme. Furthermore, truncated PA is developed to combat the limitations due to significantly low eigenvalues, which are specifically imposed by the proposed ultra-dense NOFDM. Through analytical and numerical results, we demonstrate that the proposed NOFDM schemes with optimal and truncated PA outperform the conventional NOFDM and the classical OFDM schemes.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2020.3019664