Linear Block Coding and Discrete Wavelet Transform Based Audio Signal Transmission over AWGN and Rician Fading Channels

Yıl 2019, Cilt: 7 Sayı: 2, 104 - 114, 30.04.2019

Serap Karagöl , Dogan Yildiz

https://doi.org/10.17694/bajece.456774

Cited By: 1

Öz

Mobile communication
has become an important part of our daily lives for voice communication, data
sharing and access over the Internet. Mobile communication is an open network,
so maintaining the privacy and reliability of data has always been anxiety. The
reliability of the data against channel noise can be achieved by various error
correction codes. The purpose of the channel coding process is to reduce the
effect of some disruptive elements that the data is influenced in the
transmission phase as much as possible. This procedure ensures that the data is
delivered to the receiver with minimum error. In this study, a communication
system was established in MATLAB environment for the transmission of five
second audio signal. In this communication system, BER and MSE performances of
four phase shift keying methods are obtained first.  In the second phase of the study, the AWGN and
Rician fading channels were individually coded with four different LBC types.
Performance evaluation of these coding types was done with BER and MSE
criteria. In the last part of the study, it was investigated which wavelet
family is suitable for which level, in order to ensure audio transmission over
AWGN and Rician fading channels with the least possible error. Four wavelet
transform families at different levels were applied to the audio signal for LBC
(7, 4), LBC (15, 8), LBC (17, 8) and LBC (23, 12) encoded channels, and the
Mean Squared Error (MSE) performances were compared.

Anahtar Kelimeler

Audio Signals, Channel Coding, Linear Block Coding, Wavelet Transform

Kaynakça

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