Design of OFDM system using Adaptive Modulation and Sparse Channel Estimation Method for long distance Underwater Acoustic Communication

2021 ◽  
Author(s):  
Asha M ◽  
Surekha T P
Keyword(s):  
Channel Estimation ◽  
Acoustic Communication ◽  
Adaptive Modulation ◽  
Estimation Method ◽  
Underwater Acoustic Communication ◽  
Ofdm System ◽  
Long Distance ◽  
Underwater Acoustic ◽  
Sparse Channel Estimation ◽  
Sparse Channel

Research on Doppler and Channel Estimation for Multicarrier Spread Spectrum Underwater Acoustic Communication System

2014 ◽  
Vol 1079-1080 ◽  
pp. 752-756
Author(s):  
Yuan Wang ◽  
Zhou Mo Zeng ◽  
Yi Bo Li ◽  
Wen Zhang ◽  
Hao Feng
Keyword(s):  
Channel Estimation ◽  
Compressed Sensing ◽  
Acoustic Communication ◽  
Spread Spectrum ◽  
Orthogonal Frequency Division Multiplexing ◽  
Estimation Method ◽  
Signal Propagation ◽  
Underwater Acoustic Communication ◽  
Mobile Nodes ◽  
Underwater Acoustic

Spreadspectrum orthogonal frequency-division multiplexing (SS-OFDM), which appliesspread spectrum technique into OFDM, performs robustly in severely multipathfading underwater channels. However, this technology is sensitive to thefrequency shift. Furthermore, communication in underwater acoustic (UWA)channels is more vulnerable to Doppler effect than other wireless channels dueto the low speed of acoustic signal propagation. It presents challenges forcommunication between underwater mobile nodes. Therefore, accurate Dopplerfrequency shift estimation and compensation is important. Aself-designed receiver structure for SS-OFDM system including a novel Dopplerscale estimation method and channel estimation via compressed sensing method isproposed. The simulation and experimental results offer strong proofs for ourscheme to be a viable option for acoustic communication between underwatermobile nodes and compressed sensing method outperforms the conventionalleast-squares (LS) method in channel estimation.

A Low-Complexity Sparse Channel Estimation Method for OFDM Systems

2010 ◽  
Vol E93-B (8) ◽  
pp. 2211-2214
Author(s):  
Bin SHENG ◽  
Pengcheng ZHU ◽  
Xiaohu YOU ◽  
Lan CHEN
Keyword(s):  
Channel Estimation ◽  
Estimation Method ◽  
Low Complexity ◽  
Ofdm Systems ◽  
Sparse Channel Estimation ◽  
Sparse Channel

Prediction based sparse channel estimation for underwater acoustic OFDM

2015 ◽  
Vol 96 ◽  
pp. 94-100 ◽  
Author(s):  
Na Lin ◽  
Haixin Sun ◽  
En Cheng ◽  
Jie Qi ◽  
Xiaoyan Kuai ◽  
...  
Keyword(s):  
Channel Estimation ◽  
Underwater Acoustic ◽  
Sparse Channel Estimation ◽  
Sparse Channel
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