Wireless remote access base station and pico-cell system using the same
First Claim
1. A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal and transmitting the converted downstream RF signal wirelessly, and converting a received upstream RF signal to an upstream optical signal and transmitting the upstream optical signal, comprising:
- an electro-absorption modulator (EAM) for converting the downstream optical signal to the downstream RF signal and the upstream RF signal to the upstream optical signal;
an antenna for transmitting the downstream RF signal .wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and
an amplifier, disposed between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.
1 Assignment
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Accused Products
Abstract
A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.
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Citations
8 Claims
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1. A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal and transmitting the converted downstream RF signal wirelessly, and converting a received upstream RF signal to an upstream optical signal and transmitting the upstream optical signal, comprising:
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an electro-absorption modulator (EAM) for converting the downstream optical signal to the downstream RF signal and the upstream RF signal to the upstream optical signal;
an antenna for transmitting the downstream RF signal .wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and
an amplifier, disposed between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna. - View Dependent Claims (2, 3, 4)
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5. A wireless remote access base station for modulating a downstream optical signal to a downstream radio frequency (RF) signal and transmitting the converted downstream RF signal wirelessly, and converting a received upstream RF signal to an upstream optical signal and transmitting the upstream optical signal, comprising:
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a first electro-absorption modulator (EAM) for converting the upstream RF signal to the upstream optical signal;
a second EAM for converting the downstream optical signal to the downstream RF signal;
an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the first EAM;
an amplifier, disposed between the second EAM and the antenna, amplifies the downstream RF signal, and outputs the amplified downstream RF signal to the antenna; and
a circulator for outputting the downstream RF signal amplified by the amplifier to the antenna and outputting the upstream RF signal input from the antenna to the first EAM.
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6. A pico-cell system comprising:
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a wireless router for generating downstream data and detecting upstream data;
an optical transceiver for modulating the downstream data into a downstream optical signal and outputting an upstream optical signal to the wireless router;
a wireless communication device for generating an upstream radio frequency (RF) signal and detecting data from a received downstream RF signal; and
a wireless remote access base station for converting the upstream RF signal received from the wireless communication device to the upstream optical signal, converting the downstream optical signal received from the optical transceiver to the downstream RF signal, and inputting and outputting the upstream and downstream RF signals through respective paths. - View Dependent Claims (7, 8)
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Specification