Pulse or digital communications – Repeaters – Testing
Patent
1992-06-22
1993-01-05
Barron, Jr, Gilberto
Pulse or digital communications
Repeaters
Testing
375 60, 370 19, H04B 1402, H04B 1500
Patent
active
051777681
ABSTRACT:
A spread-time code division multiple access (ST-CDMA) technique is disclosed for bandlimited access to a channel. With ST-CDMA, pseudo-random (PN) sequences are assigned to each transmitter in the multi-transmitter system, and the Fourier transform of the transmitter pulse for a given transmitter is determined by modulating the phase of the desired transmitter spectrum by the PN sequence assigned to the transmitter. The data symbols produced by the transmitter are conveyed by delayed versions of the transmitter pulse. The transmitted data for a particular transmitter is recovered at a receiver synchronized to the transmitter by sampling the output of a filter matched to the corresponding transmitter pulse.
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Crespo Pedro M.
Honig Michael L.
Salehi Jawad A.
Barron, Jr Gilberto
Bell Communications Research Inc.
Peoples John T.
Suchyta Leonard C.
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