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A coherent digital demodulator for multiple signal formats and widely varying data ratesThe Tracking and Data Relay Satellite System (TDRSS) uses four ground station demodulators for K-band signals with data rates from 1 kb/s to 300 Mb/s. The author discusses the feasibility of replacing these demodulators with a single digital demodulator that may be reconfigured by altering stored parameters to accommodate all signal formats and data rates. This implementation will reduce total ground station cost and facilitate automation of ground station operation. Analysis of system performance concentrates on the carrier tracking loop. Analytic and simulation results relate system performance to parameter values and signal format as data rate and power vary independently on the In-phase and quadrature channels. It is demonstrated that a single digital demodulator can support TDRSS-compatible signals at data rates conservatively extending from 1K symbols/s to 10M symbols/s, using off-the-shelf hardware with 6 or more bits of accuracy.
Document ID
19900061444
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mcguffin, Bruce F.
(Stanford Telecommunications, Inc. Reston, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Electronics And Electrical Engineering
Meeting Information
Meeting: MILCOM ''89 - IEEE Military Communications Conference
Location: Boston, MA
Country: United States
Start Date: October 15, 1989
End Date: October 18, 1989
Sponsors: IEEE, U.S. Armed Forces Communications and Electronics Assoc., DOD
Accession Number
90A48499
Funding Number(s)
CONTRACT_GRANT: NAS5-27732
Distribution Limits
Public
Copyright
Other

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