Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-03-13
2007-03-13
Rao, Seema S. (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S344000, C370S479000, C370S480000, C375S299000
Reexamination Certificate
active
09829360
ABSTRACT:
A communications system employs the use of both synchronous CDMA and FDMA to provide a variable bandwidth waveform with multiple bonded transmitters and receivers that are agile in both frequency and PN code to permit a variable bandwidth and variable rate multiple access system. In a first aspect the teachings provide the use of both CDMA and FDMA together to enable an improved concentration efficiency by making a larger pool of bandwidth available to each user. In a second aspect these teachings enable channel bonding across both code space and frequency space, thus making the system capable of operating within a variable (not necessarily contiguous) bandwidth and at a finely variable rate.
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Butterfield Lee A.
Ertel Richard B.
Giallorenzi Thomas R.
Griffin Dan M.
Hall Eric K.
Harrington & Smith PC
L-3 Communications Corporation
Rao Seema S.
Sefcheck Gregory
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