An underwater acoustic channel model using ray tracing in ns-2

2009 ◽  
Author(s):  
Tarik Cinar ◽  
M. Bulent Orencik
Keyword(s):  
Ray Tracing ◽  
Channel Model ◽  
Underwater Acoustic Channel ◽  
Underwater Acoustic ◽  
Acoustic Channel

Modeling Underwater Time-Varying Acoustic Channel Using OPNET

2012 ◽  
Vol 263-266 ◽  
pp. 1178-1183 ◽  
Author(s):  
Wei Gang Bai ◽  
Hai Yan Wang ◽  
Rui Qin Zhao
Keyword(s):  
Channel Model ◽  
Simulation Software ◽  
Water Medium ◽  
Time Varying ◽  
Underwater Acoustic Channel ◽  
Underwater Acoustic ◽  
Acoustic Channel ◽  
Received Power ◽  
Underwater Acoustic Network ◽  
The Impact

Underwater acoustic networks (UWAN) play a crucial role in the development of modern marine military defense and civilian marine. In many cases, the simulation of routing and MAC protocols in underwater acoustic network has ignored the impact of some critical features of complex underwater acoustic channel upon UWAN performances. This paper establishes a channel model for the Rayleigh fading channel in shallow-water medium-range communication in OPNET network simulation software. It simulates the time-varying and multi-path effects of underwater acoustic channel, which are reflected in the received power and bit error rate. Finally the validity of this channel model is verified by simulations.

scholarly journals Design of Underwater Acoustic Channel Model for OFDM Communication System

2019 ◽  
Vol 8 (6S4) ◽  
pp. 522-526
Keyword(s):  
Communication System ◽  
Ambient Noise ◽  
Channel Model ◽  
Research Work ◽  
Underwater Acoustic Channel ◽  
Underwater Acoustic ◽  
Acoustic Channel ◽  
Total Noise ◽  
Length Width ◽  
Attenuation Loss

The paper describes the design of underwater acoustic channel model for OFDM communication system. The underwater acoustic channel considered includes multipath effect, attenuation loss, absorption loss, spreading loss and total noise due to thermal Noise, turbulence Noise, shipping Noise, wave Noise. The acoustic channel model used for OFDM Communication will have the noise effect due to attenuation loss and ambient noise (Total Noise). In this research work, In the underwater channel, Multipath parameters such as length, width and depth and attenuation parameters such as frequency, salinity, radial range, SPS and ambient noise parameters such as shipping factor, wave factor are considered in calculating total noise.

scholarly journals Underwater Acoustic Channel Characterization of Shallow Water Environment

2018 ◽  
Vol 6 (1) ◽  
pp. 137-150 ◽  
Author(s):  
Tri Budi Santoso ◽  
Endang Widjiati ◽  
Wirawan Wirawan ◽  
Gamantyo Hendrantoro
Keyword(s):  
Shallow Water ◽  
Channel Model ◽  
Delay Spread ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic Channel ◽  
Underwater Acoustic ◽  
Acoustic Channel ◽  
Measurement Result ◽  
Maximum Delay

Understanding of channel propagation characteristics is a key to the optimal design of underwater acoustic communication. Generally, modelling of underwater acoustic channel is performed based on measurement result in certain site at certain times. Different sites might have different characteristics, each of which can generally be described by a model obtained by averaging measurement results at multiple points in the same environment. This paper describes a characterization of the underwater acoustic channel of tropical shallow water in a Mangrove estuary, which has sediment up to 60 cm at the bottom. Such a channel model is beneficial for the design of communication system in an autonomous underwater vehicle, for instance. The measurement result of delay spread parameter from three different points with the distance of 14 ~ 52 m, has various values. The root mean square (RMS) of delay spread ranges between 0.0621 ~ 0.264 ms, and the maximum delay spread varies with the value of 0.187 ~ 1.0 ms. The pdf fitting shows that Rayleigh distribution describes the fading variation more accurately than Nakagami and Ricean.

scholarly journals A Nonisovelocity Geometry-Based Underwater Acoustic Channel Model

2018 ◽  
Vol 67 (4) ◽  
pp. 2864-2879 ◽  
Author(s):  
Meisam Naderi ◽  
Alenka G. Zajic ◽  
Matthias Patzold
Keyword(s):  
Channel Model ◽  
Underwater Acoustic Channel ◽  
Underwater Acoustic ◽  
Acoustic Channel
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