Pulse or digital communications – Repeaters – Testing
Patent
1997-06-11
1999-06-29
Vu, Huy D.
Pulse or digital communications
Repeaters
Testing
380 9, 380 43, H04B 1500, H04K 100, H04L 2730
Patent
active
059178523
ABSTRACT:
Users or subscribers of a multi-user communications system, such as a spread spectrum communications system, provide signals to the central station or base unit of that system, and receive signals therefrom. Avoidance of interference among those users' signals is needed to ensure proper operation of the system. To do so, the data of each user is individually scrambled to randomize the data that different users are transmitting, in order to improve tracking performance at a receiver. The data of each user is scrambled independently, in a manner unique to that user in the system, in order to improve tracking performance and detection performance of a receiver. This scrambling makes the multi-user interference zero mean, and makes it possible to integrate out or average out the multi-user interference. The pattern or sequence used for this scrambling, and the pattern or sequence used for spreading here, are preferably identical except in frequency.
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Butterfield Lee A
Giallorenzi Thomas R
Gibson, Jr. L Andrew
Griffin Dan M
Harris Johnny M
Corrielus Jean B
L-3 Communications Corporation
Vu Huy D.
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