An improved modulation format and signal processing scheme for ACSB systems

An improved modulation, demodulation and signal processing scheme for Amplitude-Compandored Single Sideband (ACSB) systems will be described, which offers correction for the adverse effects of the rapid fading characteristic of the mobile environment, reduces the possibility of adjacent channel interference, and is suitable for use in either satellite-aided or terrestrial mobile communications systems operating well into the UHF region. Furthermore, it lends itself very well to an almost completely digital implementation, eliminates the requirement for costly and bulky SSB IF crystal filters, and should significantly reduce the size and cost of ACSB mobile equipment utilizing the technique.