U.S. Philips Corporation

Bruno Ballarin

Antoine Chouly

Sabine V Giorgi

A digital transmission system includes a receiver which is synchronized with a transmitter wherein a correlation is established between a reference sequence and an initialization sequence transmitted by the transmitter. The system further includes an equalizer for operating with a first part of the initialization sequence, and a correlator for operating with a second part of the initialization sequence. This makes it possible to enhance the established correlation with the reference frequency and realize the synchronization, with great precision.

Digital transmission system that can be synchronized with initialization

A communication system having a transmitter that supplies test sequences formed from several test frequencies and a receiver having test means for testing the quality of a channel. The test means calculates for the plurality of frequencies both the transfer function of the channel and the channel noise variance. By taking the noise caused by the receiver into account, the test means determine the most suitable frequency band and bit rate for the transmission. This information is supplied to the transmitter to establish the transmission.

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La Varenne St. Hilaire, France

Bruno Ballarin