Wireless communication device that implements beamforming

Patent metadata

Field	Value
Publication number	US-2022247462-A1
Application number	US-202117477672-A
Country	US
Kind code	A1
Filing date	Sep 17, 2021
Priority date	Jan 29, 2021
Publication date	Aug 4, 2022
Grant date	—

Abstract

A wireless communication device that implements beamforming includes: a storage, a processor, and a radio circuit. The storage stores directivity information that indicates a directivity of a radio intensity obtained when beams are formed in a plurality of main lobe directions designated in advance. The processor calculates, based on the directivity information, an interference to a first beam from a second beam when an instruction to form the first beam and the second beam is given. The first beam is configured to transmit a first signal in a first main lobe direction. The second beam is configured to transmit a second signal in a second main lobe direction. The processor generates, based on the calculated interference, a cancellation signal for canceling the second signal in the first main lobe direction. The radio circuit transmits the first signal and the cancellation signal.

First claim

What is claimed is:

1 . A wireless communication device that implements beamforming, the wireless communication device comprising:
a storage configured to store directivity information that indicates a directivity of a radio intensity obtained when beams are formed in a plurality of main lobe directions designated in advance; a processor configured to
calculate, based on the directivity information, an interference to a first beam from a second beam when an instruction to form the first beam and the second beam is given, the first beam being for transmitting a first signal in a first main lobe direction, the second beam being for transmitting a second signal in a second main lobe direction, and
generate, based on the calculated interference, a cancellation signal for canceling the second signal in the first main lobe direction, and
a radio circuit configured to transmit the first signal and the cancellation signal.

2 . The wireless communication device according to claim 1 , wherein
the processor calculates the interference based on a radio intensity of the first beam in the first main lobe direction and a radio intensity of the second beam in the first main lobe direction.

3 . The wireless communication device according to claim 1 , wherein
the processor
calculates a correction value according to the interference,
corrects an amplitude of the second signal by using the correction value so as to generate the cancellation signal,
controls a phase of the cancellation signal such that the cancellation signal is transmitted in the first main lobe direction, and
adds the cancellation signal whose phase having been controlled to the first signal.

4 . The wireless communication device according to claim 3 , wherein
the correction value is determined such that an intensity of the cancellation signal is equal to an intensity of the second signal in the first main lobe direction.

5 . A wireless communication device that implements beamforming, the wireless communication device comprising:
a storage configured to store directivity information that indicates a directivity of a radio intensity obtained when beams are formed in a plurality of main lobe directions designated in advance; and a processor configured to
calculate, based on the directivity information, an interference to a first signal from a second signal when an instruction to form a first beam in a first main lobe direction and form a second beam in a second main lobe direction is given, the first beam being for receiving the first signal, the second beam being for receiving the second signal, and
generate, from a signal received using the second beam and based on the interference, an interference component signal indicating the second signal received via the first beam, and
remove the interference component signal from a signal received using the first beam.

6 . The wireless communication device according to claim 5 , wherein
the processor calculates the interference based on a radio intensity of the first beam in the first main lobe direction and a radio intensity of the first beam in the second main lobe direction.

7 . The wireless communication device according to claim 5 , wherein
the processor
calculates a correction value according to the interference,
controls a phase of a received signal so as to receive the signal that comes in the second main lobe direction, and
corrects, by using the correction value, an amplitude of the received signal whose phase having been controlled so as to generate the interference component signal.

8 . The wireless communication device according to claim 7 , wherein
the correction value is determined such that an intensity of the interference component signal is equal to an intensity of the second signal received via the first beam.

Assignees

• Fujitsu Ltd

Inventors

• Tobisu Yusuke
• Ohta Kohei
• Matsubara Satoshi
• Komatsuzaki Akihiko
• Kawano Hisato
• Kannari Hideyuki

Classifications

• H04B7/0617 Primary

  for beam forming · CPC title

• H04B15/00 Primary

  Suppression or limitation of noise or interference (by means associated with receiver H04B1/10) · CPC title