Experiments on ACSSB land mobile satellite communications

Abstract

The performance of a land mobile earth station using the amplitude companded single sideband (ACSSB) modulation technique, and results of field experiments which were conducted at L-band (1.6/1.5 GHz) in a static environment and in rural, suburban, and urban areas, are described. Results of the experiments show that the required carrier to noise power density ratio (C/No) for voice communications is greater than 40 dBHz and the required C/No for pilot signal tracking is 34 dBHz. A comparison of the ACSSB system with the conventional narrowband frequency modulation (NBFM) system is also carried out. The analysis of the power spectral density indicates that the ACSSB system is four times as efficient as the NBFM system.<>