Control apparatus and control method
There is provided a control device of a wireless communication system including the control device that is installed on a moving object and moves, a first communication device that transmits a desired signal to the control device by a first wireless method, a second communication device that transmits an interference signal interfering with the desired signal by a second wireless method, and one or more third communication devices, the control device including: a reception unit that acquires a wireless signal including a reference signal transmitted from the third communication device in the vicinity of the second communication device by a third wireless method and a desired signal transmitted from the first communication device by the first wireless method; an extraction unit that extracts the reference signal from the wireless signal based on the third wireless method; an estimation unit that estimates a propagation channel between the third communication device and the control device based on the reference signal; and a beam control unit that directs a null of a reception beam in an arrival direction of the reference signal based on the propagation channel.
1. A control device of a wireless communication system including the control device that is installed on a moving object and moves, a first communication device that transmits a desired signal to the control device by a first wireless method, a second communication device that transmits an interference signal interfering with the desired signal by a second wireless method, and one or more third communication devices, the control device comprising:
a receptor that acquires a wireless signal including a reference signal transmitted from the third communication device in the vicinity of the second communication device by a third wireless method and a desired signal transmitted from the first communication device by the first wireless method;
an extractor that extracts the reference signal from the wireless signal based on the third wireless method;
an estimator that estimates a first propagation channel between the third communication device and the control device based on the reference signal; and
a beam controller that directs a null of a reception beam in an arrival direction of the reference signal based on the first propagation channel.
2. The control device according to claim 1 , wherein
the extractor extracts the desired signal from the wireless signal based on the first wireless method,
the estimator estimates a second propagation channel between the first communication device and the control device based on a known signal in the desired signal, and
the beam controller directs a reception beam in an arrival direction of the desired signal based on the second propagation channel.
3. The control device according to claim 1 , wherein
a wireless method of the desired signal, a wireless method of the interference signal, and a wireless method of the reference signal are different from each other.
4. The control device according to claim 1 , wherein
a spreading factor of the desired signal, a spreading factor of the interference signal, and a spreading factor of the reference signal are different from each other.
5. The control device according to claim 1 , wherein
the extractor extracts the reference signal from the wireless signal by despreading processing using a spreading code in the third wireless method.
6. The control device according to claim 1 , wherein
the extractor extracts the reference signals alternately transmitted from a plurality of the third communication devices.
7. A control method executed by a control device of a wireless communication system including the control device that is installed on a moving object and moves, a first communication device that transmits a desired signal to the control device by a first wireless method, a second communication device that transmits an interference signal interfering with the desired signal by a second wireless method, and one or more third communication devices, the control method comprising:
acquiring a wireless signal including a reference signal transmitted from the third communication device in the vicinity of the second communication device by a third wireless method and a desired signal transmitted from the first communication device by the first wireless method;
extracting the reference signal from the wireless signal based on the third wireless method;
estimating a first propagation channel between the third communication device and the control device based on the reference signal; and
directing a null of a reception beam in an arrival direction of the reference signal based on the first propagation channel.