Wireless communication method and wireless communication terminal for coexistence with legacy wireless communication terminal
US-12149354-B2 · Nov 19, 2024 · US
Digital communication system
US9548877B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9548877-B2 |
| Application number | US-201314654513-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 20, 2013 |
| Priority date | Dec 20, 2012 |
| Publication date | Jan 17, 2017 |
| Grant date | Jan 17, 2017 |
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Abstract
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Methods and apparatus for use in communication systems using recursive modulation schemes with a Low Density Generator Matrix code (including an irregular repeat accumulate (IRA) code) are described that have reduced complexity and thus reduced cost compared to prior art systems. A communication system is described in which the transmitter concatenates a low density generator matrix code with an accumulator followed by a recursive modulator in order to eliminate the use of an interleaver, and in which the receiver combines the decoder for the accumulator and the soft demodulator into a single joint decoder in order reduce the number of components and complexity. Another variation is also described in which the transmitter is further simplified by eliminated the accumulator altogether, and in which the receiver is further simplified by replacing the joint decoder with a soft demodulator prior to the LDGM soft decoder.
First claim
Opening claim text (preview).
The invention claimed is: 1. An apparatus for receiving a transmission in a communication system implementing a recursive modulation scheme and an Irregular Repeat Accumulate (IRA) code, the apparatus comprising: a soft demodulator comprising a joint recursive modulator and accumulator soft decoder for receiving a transmit signal and configured to demodulate the received signal using a trellis based algorithm using a joint trellis for the accumulator and recursive modulation schem…
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Electricity · mapped topic
- H04L27/18Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9548877B2 cover?
- Methods and apparatus for use in communication systems using recursive modulation schemes with a Low Density Generator Matrix code (including an irregular repeat accumulate (IRA) code) are described that have reduced complexity and thus reduced cost compared to prior art systems. A communication system is described in which the transmitter concatenates a low density generator matrix code with a…
- Who is the assignee on this patent?
- Univ South Australia
- What technology area does this patent fall under?
- Primary CPC classification H04L27/18. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 17 2017 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).