Intranetwork code division multiple access communication system

Details Intranetwork code division multiple access communication system Intranetwork code division multiple access communication system

1985-03-21

1987-02-17

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

455 38, 370 93, H04J 1300

Patent

active

046445609

ABSTRACT:
A CDMA format is used within a network to permit communication between members of a network. Network members are synchronized to each other and are each aware of a predetermined set of code words which has been established. A member desiring to transmit data selects a code word from the predetermined set. If there are unused code words, one of the unused words is randomly selected. If all words are being used, the code word of the farthest user is selected. Since all members are synchronized in time to stable clocks, the range of each user is known. All members of the network are always listening and keeping track of detections of other users and code words. Transmitted signals are a series of pulses with a jitter or sync pulse inserted within each series. The number and location of sync pulses is unique for each code and defines the CDMA code of the signal. A pseudorandom noise generator synchronized to the clock is gated with coded data pulsed with appropriate jitter insertion and transmitted over a frequency determined by the pseudorandom number at any instant in time.

REFERENCES:
patent: 3239761 (1966-03-01), Goode
patent: 3432619 (1969-03-01), Blasbalg
patent: 3562431 (1971-02-01), Inose
patent: 3647975 (1972-03-01), Goto et al.
patent: 4135156 (1979-01-01), Sanders, Jr. et al.
patent: 4247947 (1981-01-01), Miyamoto

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