Results 251 to 260 of about 62,673 (306)

QoS-enabled underwater acoustic communications

OCEANS 2018 MTS/IEEE Charleston, 2018
For enabling efficient operation of untethered underwater vehicles, error-free underwater communication of command-and-control and telemetry data is a necessity. In contrast, the communication requirements for the sensor data of these vehicles are often less stringent, i.e., a few bad pixels in a SONAR image might be tolerated.
Blom, K.C.H., Dol, H.S.
openaire   +2 more sources

Network-assisted underwater acoustic communications

Proceedings of the Seventh ACM International Conference on Underwater Networks and Systems - WUWNet '12, 2012
For many underwater acoustic applications, the source and receiver systems carry a single transducer antenna. The lack of spatial diversity makes it difficult to carry out phase coherent communications. Using distributed nodes of an underwater acoustic network, this paper address phase coherent underwater acoustic communications using source diversity.
T. C. Yang, Kevin D. Heaney
openaire   +1 more source

Swept Carrier Acoustic Underwater Communications

OCEANS '78, 1978
This paper describes a novel idea of reducing multipath interference in underwater acoustic communication systems. The proposed idea is based on the observation that the time separation between direct and multipath waveforms can be utilized to suppress the multipath interference.
A. Zielinski, L. Barbour
openaire   +1 more source

Underwater acoustic wireless multiuser communication

2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08), 2008
The characteristics of shallow water are studied in this paper, including multipath spreading, frequency selective attenuation and so on, which is a guidance for disposing communication modems according to the sound velocity profile to mitigate intersymbol interference (ISI) and to improve the underwater acoustic (UWA) communication range.
null Yin Jingwei, null Wang Lei, null Chen Kai   +2 more
openaire   +1 more source

Underwater Acoustic Communications Based on OTFS

International Conference on the Software Process, 2020
The orthogonal time frequency space (OTFS) modulating and demodulating signal in delay-Doppler domain alleviates the multipath delay spread and Doppler spread effects simultaneously.
Xiao Feng, Hamada Esmaiel, Junfeng Wang, Jie Qi, Mingzhang Zhou, Zeyad A. H. Qasem, Haixin Sun, Yaping Gu   +7 more
semanticscholar   +1 more source

Frequency–Time Domain Turbo Equalization for Underwater Acoustic Communications

IEEE Journal of Oceanic Engineering, 2020
Hybrid turbo equalization is a novel and effective approach for communication systems as it can benefit from two turbo equalizers at different stages of iterative process.
Junyi Xi, Shefeng Yan, Lijun Xu, Zhen Zhang, Di Zeng   +4 more
semanticscholar   +1 more source

Digital underwater acoustic voice communications

IEEE Journal of Oceanic Engineering, 1996
This paper describes the design of an underwater acoustic diver communication system controlled by a digital signal processor. The speech signal transmission rate is compressed by using linear predictive coding (LPC) and the extracted parameters are transmitted through the water to a synchronized receiver by employing digital pulse position modulation (
B. Woodward, H. Sari
openaire   +1 more source

A New IDMA System Based on CSK Modulation for Multiuser Underwater Acoustic Communications

IEEE Transactions on Vehicular Technology, 2020
This work proposes a novel interleave-division multiple access (IDMA) system based on cyclic shift keying (CSK) modulation, named CSK-IDMA, for multiuser underwater acoustic (UWA) communications.
Lianyou Jing, Chengbing He, Han Wang, Qunfei Zhang, Hongxi Yin   +4 more
semanticscholar   +1 more source

Adaptive Turbo Equalization for Differential OFDM Systems in Underwater Acoustic Communications

IEEE Transactions on Vehicular Technology, 2020
In this correspondence paper, an adaptive turbo equalizer for differential OFDM systems in underwater acoustic communications is proposed. This scheme first reconstructs the demodulation symbols using the soft information fed back from the channel ...
Shiduo Zhao, Shefeng Yan, Junyi Xi
semanticscholar   +1 more source

Frequency-domain equalization with interference rejection combining for single carrier multiple-input multiple-output underwater acoustic communications.

Journal of the Acoustical Society of America, 2020
This paper describes a three-step frequency-domain equalization scheme for multiple-input multiple-output (MIMO) underwater acoustic communication.
Jingwei Yin, Wei Ge, Xiao Han, Long-xiang Guo   +3 more
semanticscholar   +1 more source