Experimental Evaluation of VHF FM, SSB and ACSSB in the Interference Context of the Land Mobile Radio Bands

by

 Luc Boucher

M. Eng, 1990

Abstract

Spectrum efficiency and system properties of analog VHF ACSSB, FM and SSB in the interference context of the land mobile radio bands are defined and evaluated. An overview of the pilot-based SSB systems and their performance is presented. A comparison between the SSB, pilot SSB, and FM systems is carried out experimentally. The comparison involves parameters such as protection ratio, sensitivity, and interference criteria. Channel spacing, bandwidth, emitted spectrum, audio frequency response, factors influencing the ruse distance, and interference between and within the tested modulation schemes are also experimentally compared. Conventional objective and subjective evaluation methods and criteria are evaluated. An objective measurement method that produces results similar to the subjective disruptive measure is derived. Factors influencing the introduction of ACSSB, SSB or other new technologies in the land mobile bands are presented.

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