Method of and arrangement for synchronizing the receiver arrangements in a digital multiplex transmission system
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United States of America Patent
Stats
-
Aug 18, 1987
Grant Date -
N/A
app pub date -
Mar 18, 1986
filing date -
Mar 29, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital multiplex radio transmission system wherein transmission channels between a fixed radio station and a plurality of mobile radio stations may be established by code division multiplex or frequency division multiplex, individual message channels being separated by means of different distributions of the data symbols transmitted therein. In order to synchronize the fixed station transmitter with the mobile station receivers, respective synchronizing symbols are inserted between the successive data symbols transmitted in any channel. The synchronizing symbols used in all channels are the same, and are spaced at the same time intervals in each channel. Consequently, they are received with significantly higher energy than the data symbols, permitting the multi-path profile to be measured and providing reliable synchronization.
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