Analysis and design of a satellite digital audio broadcasting system based on trellis-coded quasi-orthogonal code division multiplexing

Trellis-coded quasi-orthogonal code-division multiplexing (TCQO-CDM) is introduced as a transmission technique for digital audio broadcasting. The technique shows good performance over the satellite L-band fading channel and also in the terrestrial gap-filler type of transmission. Preliminary satellite link budgets based on extensive computer simulation results are provided. The capacity achievable by the terrestrial single-frequency gap-filler network utilizing the same satellite frequency and user receiver is also discussed. Numerical results show that remarkable capacity can be achieved utilizing high-Earth-orbit satellites complemented by terrestrial gap-filler transmission. A variety of transmission rates and hence broadcasting services can be realized. It is shown that a geostationary satellite can provide limited service availability and limited capacity to mobile users but can be used for experimental purposes