Title :
Enhancing the spectral efficiency of the American digital cellular system with coded modulation
Author :
Chennakeshu, Sandeep ; Koilpillai, R.D. ; Dahlman, Erik
Author_Institution :
Gen. Electr. Corp. Res. & Dev. Center, Schenectady, NY, USA
Abstract :
Set partitioned trellis codes and multi-level block codes can be used to increase the information rate of the American digital cellular system (IS-54) from 1.22 bits/symbol to 1.75-2 bits/symbol. This increase in information rate can be used to enhance speech quality or increase system capacity. The bit error rate performance of several block coded modulation schemes is studied via simulation for flat and dispersive Rayleigh fading channels using the IS-54 base-mobile frame format. Coherent and differential detection, and equalization are studied considering finite interleaving and channel estimation via interpolation
Keywords :
Rayleigh channels; block codes; cellular radio; channel capacity; decoding; digital radio; equalisers; error statistics; fading; land mobile radio; modulation coding; radio spectrum management; signal detection; time division multiple access; time-varying channels; trellis coded modulation; American digital cellular system; IS-54; bit error rate performance; block coded modulation schemes; channel estimation; coded modulation; coherent detection; differential detection; dispersive Rayleigh fading channels; equalization; finite interleaving; flat Rayleigh fading channels; information rate; interpolation; multilevel block codes; set partitioned trellis codes; spectral efficiency; speech quality; system capacity; Bit error rate; Block codes; Channel estimation; Convolutional codes; Dispersion; Fading; Information rates; Interleaved codes; Modulation coding; Speech enhancement;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345242
