Circuit array and method for creating a data feedback channel from receiver to transmitter in a common frequency network
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United States of America Patent
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-
Jan 23, 2001
Grant Date -
N/A
app pub date -
Apr 22, 1998
filing date -
Dec 16, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The establishment of an interactive broadcasting network requires not only a transmission channel from transmitter to receiver but also a transmission channel from receiver to transmitter. A novel method of creating a data feedback channel from receiver to transmitter is implemented in a common frequency network and involves the use of a transmission procedure in conformity with the DAB standard. Each receiver or user is assigned an identifier which is transmitted in the data feedback channel at specially reserved frequencies to request transmission capacity. A computer then allocates transmission capacity to the receiver. The signals received in the forward channel are evaluated using the synchronization symbols they contain in order to synchronize the transmitter component in the receiver. The novel process can be used in all common frequency networks which use data transmission in conformity with the DAB standard and ensures a particularly economical synchronization in the receiver.
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