Transmission of Audio Signal From Reed-Solomon AWGN Channel Using Wavelet Transform Families

Abstract

Mobile communication has become an important partof our daily lives for voice communication, data sharing and accessover the Internet. Mobile communication is an open network, somaintaining the privacy and reliability of data has always beenanxiety. The reliability of the data against channel noise can beachieved by various error correction codes. The primary purposeof the channel coding process is to reduce the effect of disturbinginfluences to the minimum level. In this way, the receiver will beable to receive the data sent by the transmitter with the minimumerror. In this research paper, it is required to acquire two audiosignals with 8 bits of resolution and 8 kHz sampling frequency for5 seconds in MATLAB. In the first part of this study, Reed-Solomon (RS) Coding Method was used to transmit two audio datarecorded in .wav format with minimum error. Binary Phase ShiftKeying (BPSK) modulation was used as the modulation method.The Bit Error Rate (BER) performance curve was plotted and thedifference between the original and the received signal wasobserved. According to the BER performance curve, as the signalto noise ratio increases, less false data is received at the receiver.In the second part of the study, four wavelet transform families atdifferent levels were applied to the audio signal, and theperformances of these classes were compared.