Loss factors associated with spatial and temporal tracking errors in intersatellite PPM communication linksThe performance of an optical PPM intersatellite link in the presence of spatial and temporal tracking errors is investigated. It is shown that for a given rms spatial tracking error, an optimal transmitter beamwidth exists which minimizes the probability of bit error. The power penalty associated with the spatial tracking error when the transmitter beamwidth is adjusted to achieve optimal performance is shown to be large (greater than 9 dB) when the rms pointing jitter becomes a significant fraction (greater than 30 percent) of the diffraction limited beamwidth. The power penalty due to temporal tracking error, on the other hand, is relatively small (less than 0.1 dB) when the tracking loop bandwidth is less than 0.1 percent of the slot frequency. By properly allocating losses to spatial and temporal tracking errors, it is seen that a 10 to the -9th error rate can be achieved for a realistic link design with an approximately 3 dB signal power margin.
Document ID
19870058265
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chen, C. C. (Illinois Univ. Urbana, IL, United States)
Gardner, C. S. (Illinois, University Urbana, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking