Optical network architecture for hierarchical modulation
US-2015381303-A1 · Dec 31, 2015 · US
Systems and methods for transmitting and receiving additional data over legacy satellite digital audio radio signals
US9036720B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9036720-B2 |
| Application number | US-42692809-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 20, 2009 |
| Priority date | Mar 29, 2007 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
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Abstract
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Systems and methods for transmitting and receiving additional data, such as video data, over legacy satellite digital audio radio signals are provided. In exemplary embodiments, hierarchical modulation can be used to transmit secondary information over a legacy signal. For example, the Sirius Satellite Digital Audio Radio Service (“SDARS”) system may use a second layer of modulation to transmit video data on top of its regular audio signal. In order to support such future services within the original system design, sometimes referred to herein as a “legacy” system, additional information bandwidth can be acquired, for example, by using hierarchical modulation to overlay data for such new services on top of the legacy transmission. In such a system, for example, overlay data can be transmitted by applying a programmable angular offset to legacy QPSK symbols, for forming a new constellation similar to 8PSK.
First claim
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What is claimed: 1. A method of transmitting information over a satellite digital audio radio service (“SDARS”) system, comprising: first modulating a digital legacy signal using a first digital modulation scheme to encode the legacy signal into a first data stream of symbols; second modulating each of the symbols in the first data stream using a second digital modulation scheme to encode at least one additional digital signal, wherein the second digital modulation scheme adds…
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Electricity · mapped topic
Electricity · mapped topic
- H04L27/3488Primary
Electricity · mapped topic
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- What does patent US9036720B2 cover?
- Systems and methods for transmitting and receiving additional data, such as video data, over legacy satellite digital audio radio signals are provided. In exemplary embodiments, hierarchical modulation can be used to transmit secondary information over a legacy signal. For example, the Sirius Satellite Digital Audio Radio Service (“SDARS”) system may use a second layer of modulation to transmit…
- Who is the assignee on this patent?
- Scarpa Carl, Schell Edward, Sirius Xm Radio Inc
- What technology area does this patent fall under?
- Primary CPC classification H04L27/3488. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 19 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).