IMPLEMENTATION OF AN EHF FREQUENCY-HOPPING SIMULATOR

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Authors
  1. Addison, R.D.
  2. Seed, W.R.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
EHF SATCOM offers communications robustness by incorporating wide-band frequency-hopping and on-board satellite processing to mitigate the effects of electronic interference. The same characteristics that make EHF SATCOM robust however, also make it complex. Satellite on-board processing means that synchronization must be achieved for both the uplink and the downlink. The Skynet EHF (extremely high frequency) Downlink Trials consisted of several week-long accesses over Skynet 4A during 1993 and 1994. The whole link (up to satellite and back down) was used to simulate and EHF frequency-hopped downlink from a processing satellite. To aid in the analysis of EHF SATCOM, in-house ground terminal and payload simulators were developed. For this set of trials, the synchronization and communications aspects of an EHF frequency-hopped downlink using burst differential phase-shift keying modulation were investigated. The payload and ground terminal simulators were developed using a combination of off-the-shelf components and in-house developed hardware and software. The implementation of these two simulators is detailed in this report after the description of the experimental waveform. The Skynet EHF Downlink Trials were successfully run in week-long experiments over two years. Frequency-hopped spatial and time synchronization were achieved. Data and voice communications were demonstrated with and without time diversity. Problems with the commercial frequency hopping synthesizers preclu
Report Number
DREO-1279 —
Date of publication
01 Dec 1995
Number of Pages
57
DSTKIM No
96-02373
CANDIS No
155550
Format(s):
Document Image stored on Optical Disk;Hardcopy

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