Performance analysis of direct-sequence spread-spectrum underwater acoustic communications with low signal-to-noise-ratio input signals

Yang, T. C.; Yang, Wenguo

doi:10.1121/1.2828053

Cited by 97 publications

(53 citation statements)

References 16 publications

(27 reference statements)

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“…Auditive aspects are also important, with noiselike waveforms such as phase-shift keying (PSK) and orthogonal frequency-division multiplexing (OFDM) being preferred to frequency-shift keyed or chirp modulations. Direct-sequence spread spectrum is a logical candidate modulation to achieve acoustic data transfer at low SNR [6], [7], but the present paper shows that OFDM is a strong contender.…”

Section: Introductionmentioning

confidence: 99%

Multiband OFDM for Covert Acoustic Communications

Leus

Walree

2008

IEEE J. Select. Areas Commun.

132

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Abstract-A multiband OFDM transmitter and receiver are presented for underwater communications at low SNR. Compared with a single-band OFDM scheme, the multiband approach leads to a considerable reduction in the receiver complexity.The proposed system has been tested at sea with 16 subbands covering a total bandwidth of 3.6 kHz, at user data rates of 4.2 and 78 bit/s, and over ranges up to 52 km. At the lower rate, successful message recovery is achieved on a single hydrophone at SNRs down to −17 dB in a benign channel. In channels with a severe delay-Doppler spread the critical SNR rises by some 4 dB. At 78 bit/s the limits of the OFDM signaling scheme are clearly revealed, but at 4.2 bit/s the performance is limited by failure of signal detection and initial synchronization.

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Section: Introductionmentioning

confidence: 99%

Multiband OFDM for Covert Acoustic Communications

Leus

Walree

2008

IEEE J. Select. Areas Commun.

132

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“…For this reason, PPC is not suitable for our application on account of power consumption limitations and simplicity of the nodes. Direct sequence spread spectrum (DSSS) technique has been demonstrated to be reliable in UWA communication [7][8][9][10][11]. The DSSS technique not only features a low probability of interception but also is immune to multipath interference.…”

Section: Introductionmentioning

confidence: 99%

“…Sozer et al applied a RAKE receiver to combine multipath arrivals [9]. In T. C. Yang and W. Yang's research, DSSS was coupled with passive-phase conjugation to achieve communication with low SNR input signals [10]. However, due to the conflict between the spread spectrum process and a limited available bandwidth of UWA channels, the main drawback of DSSS technique is the bandwidth efficiency, which is lower than 0.5 bit/s/Hz [12].…”

Section: Introductionmentioning

confidence: 99%

Multicarrier Spread Spectrum Communication Scheme for Cruising Sensor Network in Confined Underwater Space

Wang

Zeng

et al. 2014

International Journal of Distributed Sensor Networks

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A cruising sensor network works as an online monitoring system for industrial liquid environments such as oil tanks and nuclear storage ponds. The cruising sensor network consists of a few submerged nodes which can actuate themselves to execute tasks like "cruising. " This paper presents a multicarrier spread spectrum scheme, which is designed for communications between the nodes and the control station. Although underwater acoustic communication has been widely researched due to the growing demands from ocean development and marine research, communication in confined underwater space is an unexplored domain as most research focuses on communication in spacious water areas. The occasions that the cruising sensor network works in are confined. The main distinction in confined underwater spaces is the existence of strong multipath arrivals reflected by the boundaries, which can cause more severe intersymbol interference (ISI). We propose a communication scheme which applies spread spectrum in orthogonal frequency-division multiplexing (OFDM) to address severe frequency selective fading channels. This scheme can be robust in confined underwater channels when coupled with turbo code. The simulation and experimental results prove the feasibility and reliability of this scheme. It is demonstrated that significantly better performance is achieved than that of the conventional OFDM method.

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“…Direct sequence spread spectrum (DSSS) technique has gained considerable attention in UWA communication not only for its low interception probability and inherent interference rejection, but also for its relative immunity from multipath interference [2][3][4]. In DSSS modulation, the original signal is multiplied by a pseudo-noise (PN) code to perform spread spectrum process.…”

Section: Introductionmentioning

confidence: 99%

Research on Improvement of Spectrum Efficiency of Spread Spectrum OFDM Communication Scheme for Cruising Sensor Network

Wang

Zeng

et al. 2014

International Journal of Distributed Sensor Networks

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Cruising sensor nodes have an attractive application in monitoring liquid-based industrial environments. A cruising sensor node, equipped with various sensors, is self-propelled so that they can "cruise" to specified area to gather scientific data. The cruising sensor network consists of an array of such cruising nodes to perform collaborative monitoring task over a given area. A reliable and high-speed underwater acoustic (UWA) communication scheme is necessary for node-to-node communication. Most of the industrial liquid reservoirs are confined spaces, including large oil tanks and nuclear storage ponds. The communication in confined underwater space will suffer more severe multipath interference caused by numerous reflections from boundaries. Conventional orthogonal frequency-division multiplexing (OFDM) technique has poor performance in this channel. Instead, spread spectrum orthogonal frequency-division multiplexing (SS-OFDM), which applies spread spectrum technique into OFDM, has better performance in such severely multipath fading underwater channels. However, the spread spectrum process causes a huge waste in the spectrum efficiency. In order to enhance the transmission efficiency, a mapping sequence spread spectrum OFDM (MSSS-OFDM) method is proposed in this paper. The simulation and experimental results show that our scheme is a robust and spectrum efficient communication method for confined underwater space.

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Performance analysis of direct-sequence spread-spectrum underwater acoustic communications with low signal-to-noise-ratio input signals

Cited by 97 publications

References 16 publications

Multiband OFDM for Covert Acoustic Communications

Multiband OFDM for Covert Acoustic Communications

Multicarrier Spread Spectrum Communication Scheme for Cruising Sensor Network in Confined Underwater Space

Research on Improvement of Spectrum Efficiency of Spread Spectrum OFDM Communication Scheme for Cruising Sensor Network

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