Digital Audio Broadcasting (DAB) to mobile and fixed users exploiting the latest advances in compression, coding and transmission techniques represents an appealing application for future satellite systems. Due to the system complexity, a fully analytical approach to analyze the performance and optimize the transmission parameters is practically not feasible. In this case, a powerful and flexible simulation package is an essential tool to overcome the analytical difficulties. This paper introduces Coded Quasi-Orthogonal Code Division Multiplexing (CQO-CDM) as a transmission technique for Digital Audio Broadcasting and reports the results of the system analysis performed by using the TOPSIM-IV package. Preliminary satellite link budgets are provided by extensive computer simulations. Numerical results show that, by using a constellation of satellites in Highly Elliptical Orbit (HEO) complemented by terrestrial gap-filler network, it is possible to achieve a remarkable overall capacity. It has been also found that the proposed communication technique performs well over both the L-band satellite fading channel and the terrestrial gap-filler type of transmission and a variety of broadcasting services can be supplied with different data rates.
Software Simulation Using TOPSIM-IV of a Satellite Mobile CDMA System for Digital Audio Broadcasting
GIANNETTI, FILIPPO
1993-01-01
Abstract
Digital Audio Broadcasting (DAB) to mobile and fixed users exploiting the latest advances in compression, coding and transmission techniques represents an appealing application for future satellite systems. Due to the system complexity, a fully analytical approach to analyze the performance and optimize the transmission parameters is practically not feasible. In this case, a powerful and flexible simulation package is an essential tool to overcome the analytical difficulties. This paper introduces Coded Quasi-Orthogonal Code Division Multiplexing (CQO-CDM) as a transmission technique for Digital Audio Broadcasting and reports the results of the system analysis performed by using the TOPSIM-IV package. Preliminary satellite link budgets are provided by extensive computer simulations. Numerical results show that, by using a constellation of satellites in Highly Elliptical Orbit (HEO) complemented by terrestrial gap-filler network, it is possible to achieve a remarkable overall capacity. It has been also found that the proposed communication technique performs well over both the L-band satellite fading channel and the terrestrial gap-filler type of transmission and a variety of broadcasting services can be supplied with different data rates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
