Pulse or digital communications – Repeaters – Testing
Patent
1990-08-13
1991-07-02
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04K 104
Patent
active
050291807
ABSTRACT:
A transceiver for transmitting and receiving digital data is disclosed. The transceiver employs direct sequence spread spectrum communications techniques for reducing interference among multiple users in a communications network environment. Each transceiver has a transmitter for locking a digital bit stream to a predetermined spread spectrum chip sequence and carrier signal. Frequency of the carrier signal and the chip sequence. Both the carrier signal, the chip sequence and the bit stream rate are derived from an integrally related to an accurate reference frequency to facilitate rapid acquisition and decoding of the signal by another transceiver. To provide for multiple communications channels on a single transmission medium, means for producing selectable carrier frequencies and/or selectable spreading sequences are included. The transceiver also has a receiver portion for acquiring and decoding a transmitted and direct sequence spread spectrum signal to recover the digital bit stream using the spread spectrum chip sequence and carrier signal.
REFERENCES:
patent: 4922506 (1990-05-01), McCallister et al.
patent: 4943975 (1990-07-01), Kurihara et al.
Cangialosi Salvatore
Echelon Systems Corporation
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