Title :
Performance of a trellis-coded 16QAM/TDMA system for land mobile communications
Author :
Kamio, Yukiyoshi ; Sampei, Seiichi
Author_Institution :
Commun. Res. Lab., Minist. of Posts & Telecommun., Tokyo, Japan
fDate :
8/1/1994 12:00:00 AM
Abstract :
Trellis-coded 16QAM/TDMA systems are proposed that have a high spectral efficiency and high transmission quality and that can support a wide variety of services. A digital pilot-symbol-aided channel sounding scheme, as well as diversity reception with maximal ratio combining, are used to compensate for fading. To further improve transmission quality, symbol interleaving and two-frequency hopping are used in the trellis-coded 16QAM/TDMA system. Computer simulation demonstrates that the bit error rate (BER) performance and the spectral efficiency of the trellis-coded 16QAM/TDMA cellular system are superior to those of π/4-QPSK/TDMA used in the American and Japanese digital cellular standards. It is also demonstrated that the trellis-coded 16QAM/TDMA with diversity, symbol interleaving, and frequency hopping can achieve a BER of about 10-4 if the delay spread is 0.1 Ts
Keywords :
amplitude modulation; digital radio systems; diversity reception; fading; frequency agility; mobile radio systems; radiowave propagation; spread spectrum communication; time division multiple access; trellis codes; BER; bit error rate; computer simulation; delay spread; digital cellular standards; digital pilot-symbol-aided channel sounding; diversity reception; fading compensation; land mobile communications; maximal ratio combining; spectral efficiency; symbol interleaving; transmission quality; trellis-coded 16QAM/TDMA system; two-frequency hopping; Automatic frequency control; Diversity reception; Fading; Frequency synchronization; ISDN; Mobile communication; Quadrature amplitude modulation; Rayleigh channels; Time division multiple access; Timing;
Journal_Title :
Vehicular Technology, IEEE Transactions on
