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Optical Channelizer Evaluation Using Empirical Data and SimulationWestinghouse Electric Corporation Division under NASA contract NAS3-25865 developed a proof-of-concept (POC) multichannel demultiplexer implemented as an acousto-optic radiofrequency (RF) with a spectrum analyzer. A detailed analysis of the experimental results indicate that the expected degradation caused by the acousto-optical channelizer is approximately 2.0 dB degradation at 10(exp -5) bit-error rate (BER) and 3.0 dB degradation at 10(exp -8) BER. This degradation may be quite acceptable when considering the excellent volume, mass, and power characteristics of acousto-optical channelizing relative to other technologies. In addition, system performance can be greatly improved by using digital pulse shaping in the modem and increasing the channel spacing from 40 to 45 kHz for 64 kbps quadrature phase-shift keying (QPSK) modulation.
Document ID
19980017429
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Ivancic,William D. (NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1998
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Report/Patent Number
NAS 1.15:107115
E-10024
NASA-TM-107115
AIAA Paper 96-1059
Meeting Information
Meeting: International Communications Satellite Systems Conference
Location: Washington, DC
Country: United States
Start Date: February 25, 1996
End Date: February 29, 1996
Sponsors: American Inst. of Aeronautics and Astronautics, Association Aeronautique et Astronautique de France, Deutsche Gesellschaft fuer Luft- und Raumfahrt, Canadian Aeronautics and Space Inst.
Funding Number(s)
PROJECT: RTOP 235-01-40
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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