Radio communication base state system including optical advanced base station
First Claim
1. A wireless communication base station system comprising:
- a wireless key base station;
an optical forward base station; and
an optical transmitter which connects said wireless key base station and said optical forward base station to each other;
wherein said wireless key base station comprises;
a modulator which modulates an input signal;
a first distributor which distributes an input signal received from said modulator to two output signals;
a first electrical to optical converter which converts a first output signal of the two output signals of said first distributor to an optical signal;
a distortion extracter which extracts a distortion component from a signal obtained by amplifying a second output signal of the two output signals of said first distributor; and
a second electrical to optical converter which converts an output signal of said distortion extracter to an optical signal;
wherein said optical forward base station comprises;
a first optical to electrical converter which converts the optical signal transmitted from said first electrical to optical converter through said optical transmitter to an electrical signal;
a second optical to electrical converter which converts the optical signal transmitted from said second electrical to optical converter through said optical transmitter to an electrical signal; and
a distortion remover which generates an amplified signal from which said distortion component is removed by using the output electrical signal of said first optical to electrical converter and the output electrical signal of said second optical to electrical converter.
1 Assignment
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Accused Products
Abstract
A wireless communication base station system of the present invention includes a wireless key base station, an optical forward base station, and an optical transmitter which connects the wireless key base station and the optical forward base station to each other. An optical signal modulated by a signal component and that modulated by a distortion component are transmitted from the wireless key base station to the optical forward base station. In the optical forward base station, these optical signals are converted to high-frequency electrical signals, and the high-frequency signal consisting of the signal component is amplified. Thereafter, the amplified signal is combined with the high-frequency signal consisting of the distortion component with their phases opposite to each other, so that the distortion component include in the amplified signal is removed.
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Citations
28 Claims
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1. A wireless communication base station system comprising:
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a wireless key base station; an optical forward base station; and an optical transmitter which connects said wireless key base station and said optical forward base station to each other; wherein said wireless key base station comprises; a modulator which modulates an input signal; a first distributor which distributes an input signal received from said modulator to two output signals; a first electrical to optical converter which converts a first output signal of the two output signals of said first distributor to an optical signal; a distortion extracter which extracts a distortion component from a signal obtained by amplifying a second output signal of the two output signals of said first distributor; and a second electrical to optical converter which converts an output signal of said distortion extracter to an optical signal; wherein said optical forward base station comprises; a first optical to electrical converter which converts the optical signal transmitted from said first electrical to optical converter through said optical transmitter to an electrical signal; a second optical to electrical converter which converts the optical signal transmitted from said second electrical to optical converter through said optical transmitter to an electrical signal; and a distortion remover which generates an amplified signal from which said distortion component is removed by using the output electrical signal of said first optical to electrical converter and the output electrical signal of said second optical to electrical converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless communication base station system comprising:
- a wireless key base station;
an optical forward base station; and an optical transmitter which connects said wireless key base station and said optical forward base station to each other; wherein said wireless key base station comprises; a modulator which modulates an input signal; a first distributor which distributes an input signal received from said modulator to two output signals; a first electrical to optical converter which converts a first output signal of the two output signals of said first distributor to an optical signal; a first power amplifier which amplifies a second output signal of the two output signals of said first distributor; a first adjuster which adjusts an output signal of said first power amplifier; and
a second electrical to optical converter which converts an output signal of said first adjuster to an optical signal;wherein said optical forward base station comprises; a first optical to electrical converter which converts the optical signal transmitted from said first electrical to optical converter through said optical transmitter to an electrical signal; a second optical to electrical converter which converts the optical signal transmitted from said second electrical to optical converter through said optical transmitter to an electrical signal; a second distributor which distributes the electrical signal received from said first optical to electrical converter to two output signals; a first combiner which combines a third output signal of the two output signals of said second distributor and the output electrical signal of said second optical to electrical converter; a second adjuster which adjusts an output signal of said first combiner to output the adjusted signal as a distortion component; and a distortion remover which generates an amplified signal from which said distortion component is removed by using a fourth output signal of the two output signals of said second distributor and an output signal of said second adjuster. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
- a wireless key base station;
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24. A wireless communication base station system comprising:
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one wireless key base station; N optical forward base stations where N is a positive integer of 2 or more; and an optical transmitter which connects said wireless key base station and said optical forward base stations; wherein said wireless key base station comprises; a modulator which modulates an input signal; a first distributor which distributes an input signal received from said modulator to two output signals; a second distributor which distributes a first output signal of the two output signals of said first distributor to N output signals; a distortion extracter which extracts a distortion component from a signal obtained by amplifying a second output signal of the two output signals of said first distributor;
a third distributor which distributes an output signal of said distortion extracter to N output signals;N first electrical to optical converters each of which converts one of said N output signals of said second distributor to an optical signal; and N second electrical to optical converters each of which converts one of said N output signals of said third distributor to an optical signals; and each of said N optical forward base stations comprises; a first optical to electrical converter which converts the optical signal transmitted from one of said N first electrical to optical converters through said optical transmitter to an electrical signal; a second optical to electrical converter which converts the optical signal transmitted from one of said N second electrical to optical converters through said optical transmitter to an electrical signal; and a distortion remover which generates an amplified signal from which said distortion component is removed by using the output electrical signal of said first optical to electrical converter and the output electrical signal of said second optical to electrical converter. - View Dependent Claims (25, 26, 27, 28)
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Specification