Title:
SPACE DIVERSITY SYSTEM FOR TDMA COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JPS54143009
Kind Code:
A
Abstract:
A space diversity system in a TDMA communication system employing a communication satellite, in which in order to equalize the path lengths of respective sending paths at the start of communication, a pre-burst is sent out to one of the paths making up the diversity system in a time slot of one frame assigned to an instant station. A sub-burst is sent out to the other of the paths in the assigned time slot. A relative time difference between the pre-burst and the sub-burst is detected from signals sent back to the instant station from the communication satellite or signals received by a distant terrestral station via the communication satellite. On the basis of the result of a comparison operation of relative time difference between the pre-burst and the sub-burst at the time of their sending-out from the instant station with a relative time difference between the pre-burst and the sub-burst received via the communication satellite, variable delay means inserted in one of the paths is controlled so that the two relative time differences become equal to each other.
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Inventors:
OGAWA AKIRA
WATANABE TATSUO
SAITOU HIDEKI
WATANABE TATSUO
SAITOU HIDEKI
Application Number:
JP5127278A
Publication Date:
November 07, 1979
Filing Date:
April 28, 1978
Export Citation:
Assignee:
KOKUSAI DENSHIN DENWA CO LTD
International Classes:
H04B7/06; H04B7/08; H04B7/15; H04B7/185; H04J3/00; H04B7/204; H04B7/212; (IPC1-7): H04B7/04; H04B7/15; H04J3/00