Mumbai university > Comp > SEM 8 > Mobile Communication

Marks: 10M

Year: Revised 2012

A. Speech coding:

• GSM speech coder is RELP (Residually Excited Predictive Coder), which is enhanced by including a Long Term Predictor (LTP).

• The coder provides 260 bits for 20ms blocks of speech, which yields a bit rate of 13kbps.

• GSM system operates in Discontinuous Transmission mode (DTX) by incorporating a …