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Performance of Underwater Acoustic Channel using modified TCM OFDM coding techniques

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Title Performance of Underwater Acoustic Channel using modified TCM OFDM coding techniques
 
Creator Krishnamoorthy, N.R.
Suriyakala, C.D.
 
Subject Doppler Spread
Orthogonal Frequency Shift Keying
Trellis Coded Modulation
Hamming Distance
Ambient Noise
Reflection Loss
Code Rate
 
Description 629-637
Factors that limits the achievable data rate in Underwater Acoustic Channel (UAC) are high path loss, Inter-Symbol Interference (ISI), and Doppler Shift. To overcome these difficulties, Orthogonal Frequency Division Multiplexing (OFDM) is combined with Trellis Coding Modulation (TCM) techniques. In our paper, the error rate are calculated with code rate of ½ and 2/3 with all possible polynomials and the best five polynomial with least error rate are listed for discussion. The result shows that the polynomial whose code word having minimum hamming distance gives least error rate for UAC channel. Error rate is also compared with the Binary Phase Shift Keying (BPSK), Error Correcting Codes like Walsh, Hadamard, Pseudo Noise (PN) Sequence with both binary data and sample image.
 
Date 2017-03-17T05:08:26Z
2017-03-17T05:08:26Z
2017-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/40792
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.46(03) [March 2017]