Backboard transmission method, backboard transmission apparatus, and substrate unit
AssigneeFujitsu Limited
InventorFutoshi Izumi
Life of this patent
Estimating the term…
Abstract
A substrate unit and other substrate unit are mounted with integrated circuits and are connected to a backboard via respective connectors. The substrate unit monitors a signal wave passed between the substrate unit and other substrate unit and detects a delay time and a gain of a reflected wave with respect to a signal wave, performs delay adjustment with respect to a cancellation wave based on the detected delay time, performs gain adjustment with respect to the cancellation wave based on the detected gain, and superimposes the processed cancellation wave on the signal wave thereby canceling the reflected wave.
Claims27
A backboard transmission method comprising:
- monitoring a signal wave passed between a transmission-side substrate unit and a reception-side substrate unit and detects a delay time and a gain of a reflected wave with respect to the signal wave, wherein the transmission-side substrate unit and the reception-side substrate unit are mounted with integrated circuits and are connected to a backboard via respective connectors;
- performing delay adjustment with respect to a cancellation wave having a characteristic identical with that of the signal wave based on the delay time detected at the monitoring;
- performing gain adjustment with respect to the cancellation wave based on the gain detected at the monitoring;
- and
- superimposing the cancellation wave subjected to the delay adjustment and the gain adjustment on the signal wave thereby canceling the reflected wave.
A backboard transmission apparatus comprising:
- a signal-wave monitoring unit that monitors a signal wave passed between a transmission-side substrate unit and a reception-side substrate unit and detects a delay time and a gain of a reflected wave with respect to the signal wave, wherein the transmission-side substrate unit and the reception-side substrate unit are mounted with integrated circuits and are connected to a backboard via respective connectors;
- a delay adjusting unit that performs delay adjustment with respect to a cancellation wave having a characteristic identical with that of the signal wave based on the delay time detected by the signal-wave monitoring unit;
- a gain adjusting unit that performs gain adjustment with respect to the cancellation wave based on the gain detected by the signal-wave monitoring unit;
- and
- a reflected-wave canceling unit that superimposes the cancellation wave subjected to the delay adjustment by the delay adjusting unit and the gain adjustment by the gain adjusting unit on the signal wave thereby canceling the reflected wave.
A substrate unit comprising:
- a signal-wave monitoring unit that monitors a signal wave passed between the substrate unit and other substrate unit and detects a delay time and a gain of a reflected wave with respect to the signal wave, wherein the substrate unit and the other substrate unit are mounted with integrated circuits and are connected to a backboard via respective connectors;
- a delay adjusting unit that performs delay adjustment with respect to a cancellation wave having a characteristic identical with that of the signal wave based on the delay time detected by the signal-wave monitoring unit;
- a gain adjusting unit that performs gain adjustment with respect to the cancellation wave based on the gain detected by the signal-wave monitoring unit;
- and
- a reflected-wave canceling unit that superimposes the cancellation wave subjected to the delay adjustment by the delay adjusting unit and the gain adjustment by the gain adjusting unit on the signal wave thereby canceling the reflected wave.
Dependencies are inferred from the claim text.