Impact of Inter-Frame Interference on Eigendecomposition-Precoded Non-Orthogonal Frequency-Division Multiplexing

Osaki, Seichiroh; Sugiura, Shinya

doi:10.1109/lwc.2021.3074504

Cited by 4 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Proposed NOFDM-SIM reduces the subcarrier spacing, and selectively activates only some grid-points on the lattice at a given point on the time axis. low eigenvalues tend to increase the effects of inter-frame interference [29]. Hence, the τ value has to be set sufficiently high to avoid the limitations imposed by the numerically illconditioned H matrix.…”

Section: Subcarrie R Spacingmentioning

confidence: 99%

“…A majority of the previous SEFDM studies assumed the use of a sinc shaping filter (a rectangular pulse), whereas we employed the RRC filter in this study to obtain low OOB emission, similar to[29],[34],[35].This article has been accepted for publication in IEEE Transactions on Communications. This is the author's version which has not been fully edited and content may change prior to final publication.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Precoded Filterbank Multicarrier Index Modulation With Non-Orthogonal Subcarrier Spacing

Chaki

Ishihara

Sugiura

2023

IEEE Trans. Commun.

View full text Add to dashboard Cite

In this paper, we propose a novel precoded nonorthogonal frequency division multiplexing (NOFDM) with subcarrier index modulation (SIM) to increase spectral efficiency for multicarrier systems. The proposed NOFDM-SIM scheme is constituted by a filterbank multicarrier system under reduced subcarrier spacing, where precoded index modulated symbols are mapped onto the subcarriers. The detrimental effects of intercarrier interference (ICI) resulting from the non-orthogonality between subcarriers are efficiently mitigated with the aid of eigenvalue-decomposition-based precoding. Our simulation results demonstrate that the proposed precoded NOFDM-SIM system exhibits a similar peak-to-average power ratio to OFDM and OFDM-SIM counterparts while achieving the bit error rate limit of zero-ICI OFDM in a channel-uncoded setting. We analyze the power spectral density of the proposed scheme to demonstrate that the proposed scheme is strictly bandlimited, unlike its orthogonal counterpart. Furthermore, we present detailed investigations of the effects on ICI in the proposed scheme with and without precoding as well as power allocation. Finally, we introduce a three-stage iterative decoding architecture for our proposed schemes and show near-capacity error performance.

show abstract

Section: Subcarrie R Spacingmentioning

confidence: 99%

mentioning

confidence: 99%

Precoded Filterbank Multicarrier Index Modulation With Non-Orthogonal Subcarrier Spacing

Chaki

Ishihara

Sugiura

2023

IEEE Trans. Commun.

View full text Add to dashboard Cite

show abstract

“…Fig. 1 depicts the OFDM system used in 4G mobile communication systems [8]. OFDM is used for downlink transmission in the 4G system as a multi carrier communication system as it provides better spectrum utilization, less susceptible to interference and multipath fading apart from possessing high data rate transmission capability.…”

Section: Ofdm Technicmentioning

confidence: 99%

Pulse Based GFDM Modulation Technique for Future Generation Communication Systems

Yadav

2022

EJECE

View full text Add to dashboard Cite

Future mobile communication systems are mainly focused on flexibility, reliability, scalability, spectral efficiency, and robustness. A higher data rate, increased capacity, higher mobility, lower latency, and improved quality are prime objectives that need to be improved in future communication systems. This paper investigates generalized frequency division multiplexing (GFDM), a suitable waveform candidate for future communication systems. It has low complexity compared to FBMC and is highly suitable for burst signal transmission. Due to the use of non-rectangular pulse shaping, out-of-band leakage is also less. This technique is more flexible in terms of frequency localization, scalability, and integration with MIMO. Its performance in terms of BER has been computed considering the number of subcarriers, number of sub-symbols, input power back-off, and roll-off factor as variable parameters. It has been observed that change in the BER is low when the number of sub-carriers is changed but is more for change in the number of sub-symbols. Its performance degrades when the number of subcarriers, the value of the roll-off factor, and the power back-off are increased. But BER performance improves with an increase in the number of sub-symbols.

show abstract

The Evolution of Faster-Than-Nyquist Signaling

2021

Self Cite

View full text Add to dashboard Cite

The fifty-year progress of faster-than-Nyquist (FTN) signaling is surveyed. FTN signaling exploits non-orthogonal dense symbol packing in the time domain for the sake of increasing the data rate attained. After reviewing the system models of both the conventional Nyquist-based and FTN signaling transceivers, we survey the evolution of FTN techniques, including their low-complexity detection and channel estimation. Furthermore, in addition to the classic FTN signaling philosophy, we introduce the recent frequency-domain filtering and precoding aided schemes. When relying on precoding, the information rate of FTN signaling becomes related to the eigenvalues of an FTN-specific intersymbol interference matrix, which provides a unified framework for the associated information-theoretic analysis and simplifies the associated power allocation specifically designed for increasing the information rate attained. We show that the FTN signaling scheme combined with bespoke power allocation employing a realistic raised-cosine shaping filter achieves the Shannon capacity associated with ideal rectangular shaping filters.

show abstract

Impact of Inter-Frame Interference on Eigendecomposition-Precoded Non-Orthogonal Frequency-Division Multiplexing

Cited by 4 publications

References 13 publications

Precoded Filterbank Multicarrier Index Modulation With Non-Orthogonal Subcarrier Spacing

Precoded Filterbank Multicarrier Index Modulation With Non-Orthogonal Subcarrier Spacing

Pulse Based GFDM Modulation Technique for Future Generation Communication Systems

The Evolution of Faster-Than-Nyquist Signaling

Contact Info

Product

Resources

About