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Title: The performance of phase-locked loops for frequency control in single sideband land mobile radio receivers
Author: Sladen, J. P. H.
ISNI:       0000 0001 3416 9179
Awarding Body: University of Bath
Current Institution: University of Bath
Date of Award: 1983
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All of the single sideband systems currently being considered for the land mobile radio service transmit a pilot tone in addition to the wanted information. The pilot is required in the receiver for automatic gain control and automatic frequency control. In particular, a phase-locked loop is often employed to perform receiver frequency control. This thesis begins by presenting background information on phase-locked receiver design and the problem caused by excess time delay introduced into the loop of a conventional phaselocked receiver. A novel phase-locked loop configuration is introduced and shown to overcome the effects of the excess time delay. The same technique is shown to greatly improve the adjacent channel selectivity performance of a phase-locked receiver. Random phase and amplitude variations are impressed upon a signal transmitted through the land mobile multipath environment. After discussing several models of the propagation medium, some of the limitations it imposes on phase-locked SSB receiver performance are introduced.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Electrometry & electronic test equipment