Space diversity system in TDMA communication system

Details Space diversity system in TDMA communication system Space diversity system in TDMA communication system

Filed on

1979-02-21

Date issued

1980-08-19

Examiner

Safourek, Benedict V.

Patent Class

Multiplex communications

SubClass

Wide area network

SubSubClass

Packet switching

Other Related Categories

370104, 375107, 455 12, 455 52, H04L 700

Type

Patent

Status

active

Patent number

042186544

Description

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.

REFERENCES:
patent: 3418579 (1968-12-01), Hultberg
patent: 3654395 (1972-04-01), Schmidt
patent: 4107608 (1978-08-01), Saburi
patent: 4129755 (1978-12-01), Murakami

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