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AssigneeBell Communications Research, Inc.
InventorsPedro M. Crespo, Michael L. Honig, Jawad A. Salehi
Estimating the term…
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.
Circuitry in a transmitter for spectrally encoding a transmitted time signal for propagation over a channel to a receiver, the channel having a given frequency domain characteristic and noise interference, the transmitter providing a source of data symbols operating at a symbol rate, the circuitry comprising
A method in a transmitter for spectrally encoding a transmitted time signal for transmission over a channel to a receiver, the channel having a given frequency domain characteristic and noise interference, the transmitter supplying a source of data symbols at a symbol rate, the method comprising the steps of
Dependencies are inferred from the claim text.