RADIO COMMUNICATION SYSTEM
First Claim
1. A radio communication system comprising:
- a receiver; and
a transmitter configured to periodically transmit a radio signal for information transmission including information to be notified to the receiver;
wherein the receiver includesa plurality of antennas;
a composite signal generation unit configured to generate a composite signal by multiplying a signal output from each antenna when receiving the radio signal for information transmission by a weighting factor for the each antenna to combine the resulting signals from the respective antennas each having been applied with the weighting factor;
a reception processing unit configured to identify information included in the radio signal for information transmission based on the composite signal generated by the composite signal generation unit; and
a weighting factor generation unit configured to generate the weighting factor for each antenna that is used for the composite signal generation unit to generate the composite signal, wherein the weighting factor generation unit generates the weighting factor for each antenna based on a plurality of signals output from the plurality of antennas during a period in which the transmitter does not transmit the radio signal for information transmission such that a composite signal obtained by combining signals each resulting from multiplying each of the plurality of signals by the corresponding weighting factor is minimized.
1 Assignment
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Accused Products
Abstract
Provide is a radio communication system suitable for use in a factory or the like. The radio communication system includes a receiver provided with a plurality of antennas, and a transmitter for periodically transmitting a radio signal for information transmission including information to be notified to the receiver, and the receiver is an information receiver. Based on the output of each antenna during a period in which the transmission radio signal is not transmitted, a weighting factor for each antenna is generated, and the generated weighting factor is used to process the radio signal for information transmission from the receiver.
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Citations
3 Claims
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1. A radio communication system comprising:
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a receiver; and a transmitter configured to periodically transmit a radio signal for information transmission including information to be notified to the receiver; wherein the receiver includes a plurality of antennas; a composite signal generation unit configured to generate a composite signal by multiplying a signal output from each antenna when receiving the radio signal for information transmission by a weighting factor for the each antenna to combine the resulting signals from the respective antennas each having been applied with the weighting factor; a reception processing unit configured to identify information included in the radio signal for information transmission based on the composite signal generated by the composite signal generation unit; and a weighting factor generation unit configured to generate the weighting factor for each antenna that is used for the composite signal generation unit to generate the composite signal, wherein the weighting factor generation unit generates the weighting factor for each antenna based on a plurality of signals output from the plurality of antennas during a period in which the transmitter does not transmit the radio signal for information transmission such that a composite signal obtained by combining signals each resulting from multiplying each of the plurality of signals by the corresponding weighting factor is minimized.
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2. A radio communication system comprising a plurality of communication systems,
wherein each of the plurality of communication systems includes a receiver; - and
a transmitter configured to periodically transmit a radio signal for information transmission including information to be notified to the receiver and to transmit a radio signal for learning with a same frequency and a same intensity as the radio signal for information transmission during a period in which the radio signal for information transmission is not transmitted, the transmitter of each communication system transmits the radio signal for information transmission at a same time, the transmitter of each communication system transmits the radio signal for learning for each of the plurality of communication systems so that there is a time zone in which the transmitter of the corresponding communication system does not transmit the radio signal for learning but the transmitters of other communication systems transmit the radio signal for learning, and the receiver of each communication system includes a plurality of antennas; a composite signal generation unit configured to generate a composite signal by multiplying a signal output from each antenna when receiving the radio signal for information transmission from the transmitter of the corresponding communication system by a weighting factor for the each antenna to combine the resulting signals from the respective antennas each having been applied with the weighting factor, a reception processing unit configured to identify information included in the radio signal for information transmission from the transmitter of the corresponding communication system, from the composite signal generated by the composite signal generation unit; and a weighting factor generation unit configured to generate the weighting factor for each antenna that is used for the composite signal generation unit to generate the composite signal, wherein the weighting factor generation unit generates the weighting factor for each antenna based on a plurality of signals output from the plurality of antennas in the time zone in which the transmitter of the corresponding communication system does not transmit the radio signal for learning but the transmitters of other communication systems transmit the radio signal for learning such that a composite signal obtained by combining signals each resulting from multiplying each of the plurality of signals by the corresponding weighting factor is minimized.
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3. A radio communication system including first to N-th communication systems (N≥
- 2),
wherein each of the first to N-th communication systems includes a receiver; and first to M-th transmitters (M≥
2) each configured to periodically transmit a radio signal for information transmission including information to be notified to the receiver and to transmit a radio signal for learning with a same frequency and a same intensity as the radio signal for information transmission during a period in which the radio signal for information transmission is not transmitted,the first to M-th transmitters of each communication system sequentially transmit the radio signal for information transmission, a k-th transmitter (k=1 to M) of the first to N-th communication systems transmits the radio signal for information transmission at a same time, each transmitter included in the radio communication system transmits the radio signal for learning for each combination of a value i ranging from 1 to N and a value j ranging from 1 to M so that there is a time zone in which a j-th transmitter of each communication system other than an i-th communication system transmits the radio signal for learning but other transmitters do not transmit the radio signal for learning, and the receiver of each communication system includes a plurality of antennas; a composite signal generation unit configured to generate a composite signal by multiplying a signal output from each antenna when receiving the radio signal for information transmission by a weighting factor to combine the resulting signals from the respective antennas each having been applied with the weighting factor, the composite signal generation unit generating the composite signal by using a weighting count for the transmitter having transmitted the received radio signal for information transmission; a reception processing unit configured to identify information included in the received radio signal for information transmission, from the composite signal generated by the composite signal generation unit; and a weighting factor generation unit configured to generate and manage weighting factors for the first to M-th transmitters used by the composite signal generation unit, wherein the weighting factor generation unit generates the weighting factor for each antenna based on a plurality of signals output from the plurality of antennas in a time zone in which a k-th transmitter of each communication system other than the corresponding communication system transmits the radio signal for learning but other transmitters do not transmit the radio signal for learning such that a composite signal obtained by combining signals each resulting from multiplying each of the plurality of signals by the corresponding weighting factor is minimized, and manages the generated weighting factor as a weighting factor for the k-th transmitter.
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Specification