Bbc Brown, Boveri & Company, Limited

Dacfey Dzung

Walter Braun

Walter Hagmann

A method for transmitting digital data wherein the data are transmitted in several transmission sections (I-IV) which in each case contain several symbols (1-6). In the transmitter, the phase of a carrier wave is modulated by n different phase angles and their frequency is suddenly changed at the beginning or at the end of each transmission section. So that the individual transmission sections (I-IV) can be synchronized in the receiver, at least one symbol from each transmission section is additionally transmitted by the transmitter in another transmission section as synchronization information. In the receiver, the phases of the carrier wave within the individual transmission sections, that is to say the block phases, are first determined independently of each other by means of an estimating method directly from sections of the carrier wave modulated with the respective data, apart from a phase uncertainty of n-times. The final block phases are finally obtained by evaluation of the synchronization information.

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Nussbaumen, Switzerland

Dacfey Dzung