Optical transmission system, phase compensation method, and optical reception apparatus
US-2015372766-A1 · Dec 24, 2015 · US
Optical reception method and optical receiver using maximal-ratio-combining method
US9154232B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9154232-B2 |
| Application number | US-201114112653-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 9, 2011 |
| Priority date | Apr 21, 2011 |
| Publication date | Oct 6, 2015 |
| Grant date | Oct 6, 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.
In order to allow reception in which receive sensitivity does not depend upon polarization state in reception of a multi-level phase optical signal, in this optical reception method, a multi-level phase optical signal of a single polarization is separated into a first optical signal and a second optical signal of which polarizations are mutually orthogonal, the ratio of the power of the first optical signal to the power of the second signal is calculated, and the difference between the phase of the first optical signal and the phase of second optical signal is calculated as an amount of compensation, whereupon, on the basis of the ratio and the amount of compensation, the first optical signal and the second optical signal are combined using a maximal ratio combining method, and the amount of compensation is modified on the basis of the ratio.
First claim
Opening claim text (preview).
What is claimed is: 1. An optical reception method, comprising: separating, by a separation unit implemented at least in hardware, a multi-level phase optical signal of a single polarization into a first optical signal and a second optical signal of which polarizations are mutually orthogonal; calculating, by a calculation unit implemented at least in hardware, a ratio of power of the first optical signal to power of the second optical signal; calculating, by the calculation u…
Assignees
Inventors
Classifications
- H04B10/6165Primary
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 US9154232B2 cover?
- In order to allow reception in which receive sensitivity does not depend upon polarization state in reception of a multi-level phase optical signal, in this optical reception method, a multi-level phase optical signal of a single polarization is separated into a first optical signal and a second optical signal of which polarizations are mutually orthogonal, the ratio of the power of the first o…
- Who is the assignee on this patent?
- Endo Kazuomi, Hashimoto Yoichi, Nec Corp
- What technology area does this patent fall under?
- Primary CPC classification H04B10/6165. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 06 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).