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AssigneeU.S. Philips Corporation
InventorsAlfons Eizenhofer, Christoph Grauel
Estimating the term…
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.
In a digital multiplex transmission system comprising a base radio station having a transmitter and a plurality of mobile radio stations each having a receiver, channels for transmission of data symbols (d.sub.1 . . . d.sub.n) from the transmitter to the respective receivers being established by employing different code distributions of such data symbols in respective channels, such data symbols being transmitted in time-synchronism with each other;
Dependencies are inferred from the claim text.