Optical wireless transmission system, transmission device, and optical wireless transmission method
AssigneeNEC Corporation
InventorsShinichi Hori, Yuma Kase
Life of this patent
Estimating the term…
Abstract
An optical wireless transmission system includes a transmission device including a digital baseband processor configured to generate a plurality of orthogonal signals, a pulse modulator configured to pulse-modulate an orthogonal signal, and a dither modulator configured to add a dither signal to a pulse-modulated signal, an optical fiber module configured to convert a signal to which a dither signal is added into an optical signal, transmit the optical signal through an optical fiber, and convert the optical signal into a digital electric signal, and a remote unit configured to transmit a digital electric signal transmitted by the optical fiber module as a radio signal.
Claims7
An optical wireless transmission system comprising:
- a transmission device including a digital baseband processor configured to generate a plurality of orthogonal signals, a pulse modulator configured to pulse-modulate an orthogonal signal, and a dither modulator configured to add a dither signal to a pulse-modulated signal;
- an optical fiber module configured to convert a signal to which a dither signal is added into an optical signal, transmit the optical signal through an optical fiber, and convert the optical signal into a digital electric signal;
- and
- a remote unit configured to transmit a digital electric signal transmitted by the optical fiber module as a radio signal.
A transmission device comprising:
- a digital baseband processor configured to generate a plurality of orthogonal signals;
- a pulse modulator configured to pulse-modulate an orthogonal signal;
- and
- a dither modulator configured to add a dither signal to a pulse-modulated signal.
An optical wireless transmission method comprising:
- in a transmission device, generating a plurality of orthogonal signals, pulse-modulating an orthogonal signal, and adding a dither signal to a pulse-modulated signal;
- in an optical fiber module, converting a signal to which a dither signal is added into an optical signal, transmitting the optical signal through an optical fiber, and converting the optical signal into a digital electric signal;
- and
- in a remote unit, transmitting a digital electric signal transmitted by the optical fiber module as a radio signal.
Dependencies are inferred from the claim text.