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TITLE : SPEECH CODING AND ADAPTIVE CHANNEL CODING TECHNIQUE FOR MEMORY AND MEMORYLESS CHANNELS  
AUTHORS : SUDHA.P.N      ERANNA U            
DOI : http://dx.doi.org/10.18000/ijisac.50112  
ABSTRACT :

ABSTRACT

the speech and audio compression that have emerged are cost effective with diverse commercial application, the services offered by the mobile communication[12] system are enormous and hence number of mobile subcribers are increasing at a larger rate.to accommodate all these users we need to redesign the cellular system which is a tedious process.we can overcome this draw back by using the speech compression technique with adaptive channel coding technique,this paper aims at designing an algorithm for memory and memory channels with high S/N ratio,here the noise effect of the channel is predicted by transmitting a hand shake packet between the transmitter and the receiver.if the channel is erroneous then we use full rate packet coding else we use half rate packet coding hence increasing the transmission efficiency.the coded data is transmitted using the QAM technique.

KEYWORDS; LD_CELP,qam,CYCLIC CODER,CONVOLUTION CODER.

 
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