Radio base system, sampling error reducing method, and sampling error reducing program
First Claim
Patent Images
1. A radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), comprising:
- a converting apparatus (3, 4) sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
an adaptive array processing unit (6, 7, 8, 10) performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
an error signal calculating unit (9) calculating an error signal between said extracted signal and a prescribed reference signal; and
a timing control unit (30) controlling timing of sampling at said converting apparatus to minimize magnitude of said error signal.
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Abstract
On a signal received by an antenna (1, 2), an adaptive array processing is performed by a DSP to obtain an array output. A reception timing control unit (30). shifts sampling timing of a reception signal by an A/D converter (3, 4) while monitoring MSE between the array output and the reference signal, and determines an optimal sampling point (reception position) at which the sampling error is minimized.
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Citations
48 Claims
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1. A radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), comprising:
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a converting apparatus (3, 4) sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
an adaptive array processing unit (6, 7, 8, 10) performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
an error signal calculating unit (9) calculating an error signal between said extracted signal and a prescribed reference signal; and
a timing control unit (30) controlling timing of sampling at said converting apparatus to minimize magnitude of said error signal. - View Dependent Claims (2, 3, 4)
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5. A radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), comprising:
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a converting apparatus (3, 4) sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
an adaptive array processing unit (6, 7, 8, 16, 17, 18, 20) performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
an error signal calculating unit (9, 19) calculating an error signal between said extracted signal and a prescribed reference signal; and
a timing control unit (40) controlling transmission timing of a transmission signal to said mobile terminal to minimize magnitude of said error signal. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A sampling error reducing method in a radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), comprising the steps of:
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sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
calculating an error signal between said extracted signal and a prescribed reference signal; and
controlling timing of said sampling to minimize magnitude of said error signal. - View Dependent Claims (18, 19, 20)
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21. A sampling error reducing method in a radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), comprising the steps of:
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sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
calculating an error signal between said extracted signal and a prescribed reference signal; and
controlling transmission timing of a transmission signal to said mobile terminal to minimize magnitude of said error signal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A sampling error reducing program in a radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), causing a computer to execute the steps of:
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sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
calculating an error signal between said extracted signal and a prescribed reference signal; and
controlling timing of said sampling to minimize magnitude of said error signal. - View Dependent Claims (34, 35, 36)
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37. A sampling error reducing program in a radio base station system transmitting and receiving signals to and from a mobile terminal using a plurality of antennas (1, 2), causing a computer to execute the steps of:
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sampling and converting to digital data a signal from said mobile terminal received by said plurality of antennas;
performing an adaptive array processing on said digital data to extract a signal from a desired mobile terminal;
calculating an error signal between said extracted signal and a prescribed reference signal; and
controlling transmission timing of a transmission signal to said mobile terminal to minimize magnitude of said error signal. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification