Variable-Rate Sub-Band Speech Coding and Matched Channel Coding for Mobile Radio Channels
29 March 1988
The trend in future cellular mobile radio systems is towards digital transmission. Among the reasons for this are the availability of VLSI technology for digital signal processing and the need for reliable encryption. However, digital mobile radio channels are subject to signal fading and interference which causes digital transmission errors. Furthermore, a limited available radio spectrum motivates bandwidth efficient transmission methods.