Orthogonal code tracking system having phantom carrier signal

Details Orthogonal code tracking system having phantom carrier signal Orthogonal code tracking system having phantom carrier signal

1994-12-09

1996-11-12

Marcelo, Melvin

Multiplex communications

Wide area network

Packet switching

370 19, 370 22, 375200, 375206, 380 34, 455 331, H04J 1300

Patent

active

055747213

ABSTRACT:
An OCDMA communication system in which channel signals are bandwidth spread according to a PN code and each channel is identified by a selected one of a set of RW code accesses. The set of RW codes is reduced by predetermined one (preferably RW.sub.0). Each transceiver has acquisition and tracking circuitry which search for a null (e.g., the unsent RW access code) falling lower than a predetermined threshold value and synchronizing tracking on detection of the null.

REFERENCES:
patent: 4460992 (1984-07-01), Gutleber
patent: 5204874 (1993-04-01), Falconer et al.
patent: 5204876 (1993-04-01), Bruckert et al.
patent: 5309474 (1994-05-01), Gilhousen et al.
patent: 5375140 (1994-12-01), Bustamante et al.
patent: 5377226 (1994-12-01), Davis

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