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US 11,736,269 B2Granted
Low-complexity synchronization header detection
AssigneeTexas Instruments Incorporated
InventorsWenxun Qiu, Tomas Motos, Marius Moe
Life of this patent
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Abstract
A technique of separating a sequence of modulation shift keying (MSK) symbols into a first portion and a second portion and separately comparing the first portion of the sequence of MSK symbols and the second portion of the sequence of MSK symbols against a first portion of a reference sequence of MSK symbols and a second portion of the reference sequence of MSK symbols allows a low complexity detection of a start field delimiter in a wireless communication packet.
Claims20
A start field delimiter detector, comprising:
- a minimum-shift keying (MSK) demodulation circuit, configured to translate offset quadrature phase shift keying chips into a set of sequences of MSK symbols;
- a first circuit, configured to compare whether a first portion of each sequence of MSK symbols matches with a first portion of a respective sequence of reference MSK symbols;
- a second circuit, configured to compare whether a second portion of each sequence of MSK symbols matches with a second portion of the respective sequence of reference MSK symbols, wherein the second portion of each respective sequence of reference MSK symbols is invariant;
- and
- a start field delimiter detector circuit configured to indicate detection of a start field delimiter in a packet responsive to the comparison by the first circuit and the comparison by the second circuit.
2 more elements
A receiver, comprising:
- circuitry to demodulate a signal comprising offset quadrature phase shift keying chips into a set of sequences of minimum-shift keying (MSK) symbols;
- and
- a microcontroller configured to detect a start field delimiter in the received set of sequences of MSK symbols, the microcontroller comprising:
- a first circuit, configured to compare whether a first portion of each sequence of MSK symbols matches with a first portion of a respective sequence of reference MSK symbols;
- a second circuit, configured to compare whether a second portion of each sequence of MSK symbols matches with a second portion of the respective sequence of reference MSK symbols, wherein the second portion of each respective sequence of reference MSK symbols is invariant;
- and
- a start field delimiter detector circuit configured to indicate detection of a start field delimiter in a packet responsive to the comparison by the first circuit and the comparison by the second circuit.
4 more elements
A method of detecting a start field delimiter in a packet, comprising:
- converting a set of offset quadrature phase shift keying chips into a set of sequences of minimum-shift keying (MSK) symbols;
- comparing in a first comparison whether a first portion of each sequence of MSK symbols matches with a first portion of a respective sequence of reference MSK symbols that correspond to a start field delimiter;
- comparing in a second comparison whether a second portion of each sequence of MSK symbols matches with a second portion of the respective sequence of reference MSK symbols, wherein the second portion of each respective sequence of reference MSK symbols is invariant;
- and
- detecting the start field delimiter in the packet responsive to the first comparison indicating a first match and the second comparison indicating a second match.
2 more elements
An apparatus, comprising:
- a microcontroller, programmed to:
- convert a set of offset quadrature phase shift keying chips into a set of sequences of minimum-shift keying (MSK) symbols;
- compare in a first comparison whether a first portion of each sequence of MSK symbols matches with a first portion of a respective sequence of reference MSK symbols that correspond to a start field delimiter;
- compare in a second comparison whether a second portion of each sequence of MSK symbols matches with a second portion of the respective sequence of reference MSK symbols, wherein the second portion of each respective sequence of reference MSK symbols is invariant;
- and
- detect a start field delimiter in a packet responsive to the first comparison indicating a match and the second comparison indicating a match.
3 more elements
Dependencies are inferred from the claim text.