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Wireless communication apparatus, wireless communication system and wireless communication method
US8953704B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8953704-B2 |
| Application number | US-201414252000-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 14, 2014 |
| Priority date | Jan 7, 2009 |
| Publication date | Feb 10, 2015 |
| Grant date | Feb 10, 2015 |
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Abstract
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In a MIMO system using a cross-polarized antenna structure, even if no ideal XPD can be obtained, the interference between different polarized waves can be reduced to allow an effective precoding to be executed. When a MIMO communication is performed between a transmitter and a receiver each using a cross-polarized antenna structure, a channel estimating and precoding selection section of the receiver performs a channel estimation of MIMO channels from the transmitter to the receiver, decides a precoding matrix of a projection matrix for mutually orthogonalizing or substantially orthogonalizing the channel response matrixes for respective different polarized waves, and feeds the determined precoding matrix back to the transmitter. In the transmitter, a precoding processing section applies the precoding matrix to the spatial stream corresponding to one of the polarized waves to perform a precoding, thereby allowing the transmitter to transmit the polarized waves with the orthogonality therebetween maintained.
First claim
Opening claim text (preview).
The invention claimed is: 1. A communication apparatus comprising: a receiving section configured to receive control information from a communication partner apparatus, the control information including precoding matrix information (PMI) indicating a first precoding matrix and a second precoding matrix, the first precoding matrix and the second precoding matrix being selected at the communication partner apparatus; a precoding section configured to apply the first precoding matr…
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Electricity · mapped topic
- H04B7/0413Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8953704B2 cover?
- In a MIMO system using a cross-polarized antenna structure, even if no ideal XPD can be obtained, the interference between different polarized waves can be reduced to allow an effective precoding to be executed. When a MIMO communication is performed between a transmitter and a receiver each using a cross-polarized antenna structure, a channel estimating and precoding selection section of the r…
- Who is the assignee on this patent?
- Panasonic Ip Corp America
- What technology area does this patent fall under?
- Primary CPC classification H04B7/0413. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 10 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).