Pulse or digital communications – Repeaters – Testing
Patent
1987-04-20
1989-02-28
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
380 34, 380 46, 380 47, H04L 904
Patent
active
048092959
ABSTRACT:
Apparatus and a method of generating very very long pseudonoise (PN) spread spectrum codes is provided where the code is so long that it need never repeat itself during actual use. The transmitter is adapted to start to transmit one set of a plurality of component codes as a composite code having correlation properties with the component codes. When the first set of component codes are acquired at the receiver the composite code is then transmitted as a component of a different composite code which contains the previous composite code and a second new set of component codes which have correlation properties with the new set of component codes. When the second set of component codes are acquired by the receiver the composite code is then transmitted as a third new and different composite code which contains a third new set of component codes which have correlation properties with third new set of component codes. When the third new set of component set of codes is required the transmitter is already transmitting a very very long composite code but may lengthen the composite code by employing further set of component codes or may continue to transmit the very very long composite code without having any correlation properties with any of the component codes being transmitted.
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Lundquist Alan E.
Spencer Bellie M.
Zscheile, Jr. John W.
Cangialosi Salvatore
Peterson Kevin R.
Scott Thomas J.
Sowell John B.
Unisys Corporation
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