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Control method of wireless communication system, wireless communication system, wireless communication apparatus, and adjustment method of array weight vector
US8933840B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8933840-B2 |
| Application number | US-201013376936-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 28, 2010 |
| Priority date | Jun 8, 2009 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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To suppress adverse effects caused by side lobes of an antenna array when an AWV to be used for communication is determined based on a transmission/reception result of a training signal. A first transceiver generates a fixed beam pattern and transmits a training signal. In that state, a second transceiver receives the training signal while scanning for the main beam direction, and thereby determines a plurality of direction of arrivals (DOAs). Next, the second transceiver receives the training signal in a state where the signal receptions from the plurality of DODs are restricted one by one (e.g., a null direction or a direction close to the null direction is fixed in the DOA), and calculates the change of the signal characteristics from that obtained in the first reception. The transceivers obtain and use at least one AWV having the main beam direction or a sub-beam direction close to the main beam pointing to one of the plurality of DOAs except for the DOA for which the change is lower than a predefined threshold.
First claim
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The invention claimed is: 1. A control method of a wireless communication system comprising first and second communication devices, the second communication device comprising an antenna array, and an array weight vector (hereinafter “AWV”) control circuit that changes at least one of amplitudes and phases of transmission signals or received signals of a plurality of antenna elements included in the antenna array, the control method comprising: when an AWV of at least two antenna e…
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- What does patent US8933840B2 cover?
- To suppress adverse effects caused by side lobes of an antenna array when an AWV to be used for communication is determined based on a transmission/reception result of a training signal. A first transceiver generates a fixed beam pattern and transmits a training signal. In that state, a second transceiver receives the training signal while scanning for the main beam direction, and thereby deter…
- Who is the assignee on this patent?
- Hosoya Kenichi, Maruhashi Kenichi, Orihashi Naoyuki, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H04W16/28. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).