On the Compactness of OFDM and Hermite Signals

Moazzeni, Taleb

doi:10.1109/lcomm.2016.2560821

Cited by 12 publications

(5 citation statements)

References 15 publications

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“…As mentioned earlier, the main benefit of using the HG subcarriers is that they offer low TBP as well as higher spectral efficiency as they possess excellent localization properties both in the linear and nonlinear Fourier domain [10], [12]. The initial spectrum as described in ( 2) is then precompensated, transformed in the time domain and propagated through the fiber channel -see Fig.…”

Section: The Hg-based Dp-nfdm Transmissionmentioning

confidence: 99%

“…Recently, some of us proposed the use of Hermite-Gaussian (HG) wave-carriers [10], [11], as alternatives to the com-monly used sinc-based carriers. The HG wave-carriers are known to possess low TBP and excellent localization properties, both in the time and frequency domains [12]. These properties are also carried forward to the nonlinear domain, which enabled us to achieve up to 4.45 bits/s/Hz spectral efficiency (SE) for a single polarization 32-QAM system at baud rates above 20 Gbaud [11].…”

Section: Introductionmentioning

confidence: 99%

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Dual-Polarization Hermite-Gaussian-Based NFDM Transmission System

Balogun,

Derevyanko,

Barry

2023

IEEE Access

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The nonlinear frequency division multiplexing (NFDM) transmission scheme continues to attract high interests in optical communications due to its robustness against nonlinearity and dispersion. The use of Hermite Gaussian (HG) wave-carriers has been proposed and has been shown to out-perform conventional methods used by state-of-the-art single polarization NFDM systems due to their excellent time-bandwidth-product (TBP) efficiency. In this work, employing the Manakov model, we investigate and demonstrate, for the first time, a high-capacity dual polarization NFDM (DP-NFDM) transmission system based on HG wave-carriers, enhanced by a single parameter equalizer. We report here, a record high spectral efficiency of 12 bits/s/Hz for dual-polarization HG-based DP-NFDM systems.

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Section: The Hg-based Dp-nfdm Transmissionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-Polarization Hermite-Gaussian-Based NFDM Transmission System

Balogun,

Derevyanko,

Barry

2023

IEEE Access

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“…Fig. 19 shows the transmitted power of FBMC/OQAM considering the PFs, which is calculated according to (59). Fig.…”

Section: B Power Spectral Density Analysismentioning

confidence: 99%

“…Many literature works [2], [20], [23], [27], [59]- [61] focused on the design of pulse shaping filters for FBMC with the aim of reduction of OoB emission. In [59], OFDM and orthogonal Hermite signals were compared by measuring their time-bandwidth products (TBP). In [2], the PHYDYAS filter was employed in FFT/IFFT-based convolution FBMC/OQAM.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Analysis of FBMC/OQAM Systems Based on Pulse Shaping Filters

2020

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Cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) is the most widespread multicarrier modulation scheme. However, the use of a rectangular filter in CP-OFDM causes poor outof-band (OoB) radiation. Moreover, the CP causes spectral efficiency loss. To overcome these limitations, a filter bank multicarrier (FBMC) was proposed which uses prototype pulse shaping filters that can be adapted to fulfil the system requirements. The choice of the filter is crucial for FBMC/offset quadrature amplitude modulation (OQAM) due to its significant impact on the achieved performance. In this paper, new prototype pulse shaping filters in FBMC/OQAM systems are proposed, aiming to improve the system performance. A number of prototype pulse shaping filters, such as raised cosine pulse (RC), root raised cosine pulse (RRC), better than raised cosine pulse (BTRC), modified Bartlett-Hanning (MBH), improved sinc power pulse (ISP), phase modified sinc pulse (PMSP), parametric linear pulse (PLP), linear combination pulse (LCP), PHYDYAS and Hermite, are considered. The performance of each pulse shaping filter in FBMC/OQAM is evaluated and compared other in terms of the power spectral density (PSD), spectral efficiency, signal-to-interference ratio (SIR), time offset (TO), carrier frequency offset (CFO) and bit error rate (BER) performance over various channels. In addition, as multiple input multiple output (MIMO) is one of the main challenges associated with FBMC, we propose the new approach that use the frequency/time block spreading based on a Walsh-Hadamard (WH) code in MIMO FBMC/OQAM and investigate the combination of the our proposed prototype pulse shaping filters with MIMO systems. The proposed filters are shown to be suitable candidates for FBMC/OQAM systems.

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“…In an OFDM system, the symbols which are sent on carrier frequencies with frequency spacing ∆f , the time-frequency product ∆t∆f may need to be constant to achieve interference free sub-channels where ∆t is the OFDM duration 9 . When we employ the Nyquist transmission, the time-bandwidth product is roughly one [42]. Now if we would like to decrease ∆f , the OFDM transmission duration ∆t may need to be increased to maintain ∆t∆f ≈ 1.…”

Section: Data Detection and Performance Analysismentioning

confidence: 99%

Multipath Multiplexing for Capacity Enhancement in SIMO Wireless Systems

Bogale¹,

Le²,

Wang³

et al. 2017

Preprint

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This paper proposes a novel and simple orthogonal faster than Nyquist (OFTN) data transmission and detection approach for a single input multiple output (SIMO) system. It is assumed that the signal having a bandwidth B is transmitted through a wireless channel with L multipath components. Under this assumption, the current paper provides a novel and simple OFTN transmission and symbol-bysymbol detection approach that exploits the multiplexing gain obtained by the multipath characteristic of wideband wireless channels. It is shown that the proposed design can achieve a higher transmission rate than the existing one (i.e., orthogonal frequency division multiplexing (OFDM)). Furthermore, the achievable rate gap between the proposed approach and that of the OFDM increases as the number of receiver antennas increases for fixed L. This implies that the performance gain of the proposed approach can be very significant for a large-scale multi-antenna wireless system. The superiority of the proposed approach has been shown theoretically and confirmed via numerical simulations. Specifically, we have found upper-bound average rates of 15 bps/Hz and 28 bps/Hz with the OFDM and proposed approaches, respectively, in a Rayleigh fading environment with 32 receive antennas and signal to noise ratio (SNR) of 15.3 dB. The extension of the proposed approach for different system setups and associated research problems is also discussed.

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On the Compactness of OFDM and Hermite Signals

Cited by 12 publications

References 15 publications

Dual-Polarization Hermite-Gaussian-Based NFDM Transmission System

Dual-Polarization Hermite-Gaussian-Based NFDM Transmission System

Evaluation and Analysis of FBMC/OQAM Systems Based on Pulse Shaping Filters

Multipath Multiplexing for Capacity Enhancement in SIMO Wireless Systems

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