2020
DOI: 10.1109/jsyst.2019.2938185
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A Novel Receiver Design of Nonorthogonal FDM Systems in Underwater Acoustics Communication

Abstract: While Orthogonal Frequency Division Multiplexing (OFDM) has been studied for a decade, the study of Non-Orthogonal Frequency Division Multiplexing (NOFDM) in underwater acoustics (UWA) communication has never been reported, to the best of our knowledge. Therefore, we investigate NOFDM technique for UWA communication considering the doubly-dispersive channel. The main feature of NOFDM is that it involves more closely packed subcarriers compared to OFDM, which results in higher spectral efficiency. However, this… Show more

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Cited by 11 publications
(5 citation statements)
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“…Figure 5 Bit error rate (15) and c l = a l in (16). As can be seen, BER is decreased significantly through the ADSE algorithm when the SNR is higher, and the improvement is more obvious with the increase of Doppler scale.…”
Section: Simulation and Analysismentioning
confidence: 91%
See 1 more Smart Citation
“…Figure 5 Bit error rate (15) and c l = a l in (16). As can be seen, BER is decreased significantly through the ADSE algorithm when the SNR is higher, and the improvement is more obvious with the increase of Doppler scale.…”
Section: Simulation and Analysismentioning
confidence: 91%
“…A novel and computationally efficient channel estimation algorithm is proposed in [14]; the OMP algorithm is combined with the maximum a posteriori probability (MAP) technique to estimate the UWA channel gains. A greedy algorithm technique of the OMP implemented with the BEM is proposed in [15], where no prior information about channel statistics is required and the spectral leakage can be avoided. To make the expansion coefficients uncorrelated with the increasement of the OFDM frame length, time-varying complex-valued channel path gains are estimated using BEM based on the orthonormal discrete Legendre polynomials [16].…”
Section: Introductionmentioning
confidence: 99%
“…[1,2]. However, owing to the limitations are high power consumption, severe propagation delay, and so on [3][4][5][6]; it is not feasible to active all sensors to localize or track the unknown target in the underwater wireless sensor network (UWSN). Thus, the problems of sensor selection for target localization in UWSN have been considered; the goal is to make a compromise solution between the localization estimation accuracy and the best subset of activated sensors [7,8].…”
Section: Introductionmentioning
confidence: 99%
“…A combination of these factors creates a complex challenge of modeling a sufficiently accurate channel model. To combat Doppler shifts, many Doppler scale estimation techniques have been proposed as seen in [14], [15].…”
Section: Introduction Underwater Acoustic Communications (Uwac)mentioning
confidence: 99%