ACSB system design

Amplitude Compandored Single Sideband (ACSB) provides the promise of vastly increased spectrum conservation in mobile radio-telephone use, with many more channels available in the same frequency space. ACSB can even be a viable competitor to cellular, with larger "cells" at lower costs, competing in urban areas, and providing service in less populated areas that may not have 800 MHz cellular capability for many years. To maximize spectrum utilization, several ACSB channels can replace an existing FM channel, and can also occupy the space between FM channels. To accomplish this, however, the design of the systems is critical. Coverage, co-channel and adjacent-channel interference between ACSB channels and to neighboring NBFM channels, and other factors must all be considered. The theories used in this system design are explained, and then applied to several developmental trunked systems that have been proposed. The results of the design are presented.