Time synchronization message conversion
US-12160498-B1 · Dec 3, 2024 · US
Frame and symbol timing recovery for unbursted packetized transmissions using constant-amplitude continuous-phase frequency-modulation
US8948320B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8948320-B2 |
| Application number | US-201314138428-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 23, 2013 |
| Priority date | Jul 30, 2010 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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A system and method for performing frame and symbol timing synchronization on samples of a received signal that includes a series of frames. Each frame includes a known preamble and payload data. A start-of-frame time is estimated by scanning the received signal samples for the self similarity of two successive preambles. A carrier frequency offset (CFO) is estimated by maximizing a correlation between a magnitude spectrum of the received signal and a magnitude spectrum of a known preamble model. A fine estimate for the CFO is determined by computing a phase difference between samples separated by p repetitions of the base pattern for various values of index p, and computing a slope of a least squares affine fit to the phase differences. Additional operations are performed to find an optimal symbol starting point, to perform carrier phase synchronization and to detect the start of payload data.
First claim
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What is claimed is: 1. A method for performing frame and symbol timing synchronization on samples of a received signal, wherein the received signal includes a series of frames, wherein each frame includes a preamble and payload data, wherein the preamble of each frame includes multiple repetitions of a base pattern and also includes a start-of-message (SOM) word, wherein the multiple repetitions of the base pattern conform to a first constant-amplitude continuous-phase frequency mo…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8948320B2 cover?
- A system and method for performing frame and symbol timing synchronization on samples of a received signal that includes a series of frames. Each frame includes a known preamble and payload data. A start-of-frame time is estimated by scanning the received signal samples for the self similarity of two successive preambles. A carrier frequency offset (CFO) is estimated by maximizing a correlation…
- Who is the assignee on this patent?
- Nat Instr Corp
- What technology area does this patent fall under?
- Primary CPC classification H04L7/04. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 03 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).