Semi-stationary quiescent mode transmission
AssigneeST Microelectronics SA
InventorRami Verbin
Life of this patent
Estimating the term…
Abstract
A method for transmission of high-speed digital signals includes transmitting a data signal over a communication line responsive to input data, the data signal having a data frequency spectrum. During an idle interval in the input data, two idle signals are transmitted in alternation: a first idle signal, having a first frequency spectrum that is substantially stationary relative to the data frequency spectrum, and a second idle signal, having a second frequency spectrum that is substantially non-stationary relative to the data frequency spectrum.
Claims34
A method for transmission of high-speed digital signals, comprising:
- transmitting a data signal over a communication line responsive to input data, the data signal having a data frequency spectrum;
- and
- during an idle interval in the input data, transmitting in alternation a first idle signal, having a first frequency spectrum that is substantially stationary relative to the data frequency spectrum, and a second idle signal, having a second frequency spectrum that is substantially non-stationary relative to the data frequency spectrum.
Apparatus for transmission of high-speed digital signals, comprising:
- a data encoder, which is adapted to receive input data and to generate a stream of data symbols responsive to the input data and further to generate in alternation, during an idle interval in the input data, first and second sequences of idle symbols;
- a shaping filter, coupled to receive the stream of data symbols from the signal generator and to generate, responsive thereto, a data signal having a data frequency spectrum, and to receive the first and second sequences of idle symbols and to generate, responsive respectively thereto, a first idle signal, having a first frequency spectrum that is substantially stationary relative to the data frequency spectrum, and a second idle signal, having a second frequency spectrum that is substantially non-stationary relative to the data frequency spectrum;
- and
- a line driver, coupled to receive the data signal and the idle signals from the shaping filter and to transmit the signals over a line to a receiver.
Dependencies are inferred from the claim text.