System and method for daisy-chained optical repeaters
AssigneeLG Electronics Inc.
InventorJae Woo Lyu
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Abstract
The system and method for daisy-chained optical repeaters includes multiple optical repeaters connected in series by optical cables. The final optical repeater is connected to a base station by an optical cable. Each optical repeater includes a digital summer. In operation, each optical repeater sums a converted baseband digital signal with a baseband digital signal from a prior stage. The final stage transmits the summed baseband digital signal to the base station. The system and method advantageously reduces system cost and further reduces the level of noise in a signal received by the base station.
Claims28
An optical repeater system, comprising:
- a plurality of optical repeaters coupled in series, each configured to receive and convert a radio frequency (RF) analog signal To a first baseband digital electrical signal, sum the first baseband digital electrical signal and a second baseband digital electrical signal transmitted from a previous optical repeater in the series to generate an optical output signal;
- and
- a base station configured to receive and demodulate the optical output signal of a last one of the plurality of optical repeaters in the series.
A method for receiving in an optical repeater, comprising:
- receiving and converting a radio frequency (RF) analog signal to a first baseband digital signal in a first repeater;
- summing the first baseband digital signal with a second baseband digital signal received from a second repeater;
- Converting an output of the summer to an optical output signal;
- and
- transmitting the optical output signal to a base station.
A method for receiving in a first optical repeater, comprising:
- receiving and amplifying a radio frequency (RF) analog signal;
- converting the amplified RF analog signal to a first baseband digital signal;
- delaying the first baseband digital signal;
- summing the delayed first baseband digital signal and a second baseband digital signal received from a second optical repeater to generate an electric output signal;
- converting the electrical output signal to an optical output signal;
- and
- transmitting the optical output signal to a base station.
An optical repeater system, comprising:
- first optical repeater configured to receive a first radio frequency (RF) analog signal and output a first baseband digital optical signal;
- a second optical repeater coupled to the first optical repeater and configured to receive a second RF analog signal, convert the second RF analog signal to a first baseband digital electrical signal, delay the first baseband digital electrical signal, convert the first baseband digital optical signal to a second baseband digital electrical signal, sum the delayed first baseband digital electrical signal and the second baseband digital electrical signal, and convert the summed signal to a second baseband digital optical signal;
- and
- a base station coupled to the second optical repeater and configured to signal and demodulate the third baseband digital electrical
An optical repeater system, comprising:
- a first optical repeater configured to receive and convert a first radio frequency (RF) signal to a first baseband digital electrical signal and convert the first baseband digital electrical to a first optical signal;
- a second optical repeater coupled to receive the first optical signal from the first optical repeater and configured to receive and convert a second RF signal to a second baseband digital electrical signal, convert the first optical signal to an input electrical signal, add the second baseband digital electrical signal to the input electrical signal to generate a summed electrical digital signal, and convert the summed electrical digital signal to a second optical signal;
- and
- a base station configured to receive and demodulate the second optical signal.
Dependencies are inferred from the claim text.