NASA NTRS · 20080004338
Method for scrambling satellite communications
Abstract
A secure communications system multiplexes segments of the information signal for keyed encoding and modulation onto a plurality of different carrier frequencies and/or polarizations, and transmits the encoded carriers to multi-channel signal summing receivers that decode the segments from all channels, to reassemble the information signal for use by authorized stations with a key. The use of the multi-channel link and the summing receiver allows the greatest number of different coding algorithms for accommodating the greatest number of discrete secure channels.
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Brockman, Milton H.. 1992-05-12. Method for scrambling satellite communications. https://ntrs.nasa.gov/citations/20080004338
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