Downlink transmission method and apparatus
US-2024421870-A1 · Dec 19, 2024 · US
Base station apparatus and transmission method
US8995557B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8995557-B2 |
| Application number | US-201414316634-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 26, 2014 |
| Priority date | Mar 16, 2010 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.
First claim
Opening claim text (preview).
What is claimed is: 1. A base station apparatus comprising: a codebook storing section configured to store an extended codebook which is generated by combining a first basic codebook and a second basic codebook along the column direction, wherein the first basic codebook includes N groups, each consisting of four basic pre-coding matrices that are orthogonal to each other (N is a natural number equal to or larger than 2), and wherein the second basic codebook is generated by apply…
Assignees
Inventors
Classifications
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8995557B2 cover?
- The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrice…
- Who is the assignee on this patent?
- Panasonic Ip Corp America
- What technology area does this patent fall under?
- Primary CPC classification H04B7/0639. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 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).