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US 9,312,920 B2Granted
Wireless communication device and method for identifying the type of modulation among a plurality of modulation types in a near filed communication device
AssigneeProton World International N.V.
InventorsGuy Restiau, Youssef Ahssini
Life of this patent
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Abstract
A method for configuring a first near-field communication device according to a modulation type transmitted by a second device, wherein: a decoder of the first device is configured to decode an overcoded type-B modulation; a signal received during a first time slot corresponding to the duration of a symbol of an initialization frame is decoded; and the first device is configured according to the value of the decoded symbol to determine the modulation type.
Claims34
A device, comprising:
- demodulation and decoding circuitry, which in operation, decodes received signals according to a selected modulation type of a plurality of modulation types, the plurality of modulation types including type-B modulation;
- and
- modulation-type selection circuitry, coupled to the demodulation and decoding circuitry, wherein the modulation-type selection circuitry, in operation,
- controls the demodulation and decoding circuitry to decode a received signal as a type-B modulated signal for a first time slot corresponding to a duration of a symbol;
- when a result of the decoding of the first time slot as a type-B modulated signal identifies one of the plurality of modulation types as a modulation type of the received signal, selects the identified modulation type as the modulation type of the received signal;
- and
- when the result of the decoding of the first time slot as a type-B modulated signal does not identify one of the plurality of modulation types as the modulation type of the received signal, controls the demodulation and decoding circuitry to decode the received signal as a type-B modulated signal for a second time slot corresponding to the duration and selects the modulation type of the received signal based on a result of the decoding of the second time slot.
4 more elements
A system, comprising:
- analog-front-end circuitry;
- and
- digital-signal-processing circuitry coupled to the analog-front-end circuitry, wherein the digital-signal-processing circuitry, in operation,
- decodes a received signal as a type-B modulated signal for a first time slot corresponding to a duration of a symbol;
- when a result of the decoding of the first time slot as a type-B modulated signal identifies one of a plurality of modulation types as a modulation type of the received signal, selects the identified modulation type as the modulation type of the received signal;
- and
- when the result of the decoding of the first time slot as a type-B modulated signal does not identify one of the plurality of modulation types as the modulation type of the received signal, decodes the received signal as a type-B modulated signal for a second time slot corresponding to the duration and selects the modulation type of the received signal based on a result of the decoding of the second time slot as a type-B modulated signal.
4 more elements
A non-transitory computer-readable medium whose contents configure a near-field communication router to perform a method, the method comprising:
- decoding a received signal as a type-B modulated signal for a first time slot corresponding to a duration of a symbol;
- determining when a result of the decoding of the first time slot identifies one of a plurality of modulation types as a modulation type of the received signal, and when it is determined the result of the decoding of the first time slot identifies one of the plurality of modulation types, selecting the identified modulation type as the modulation type of the received signal;
- and
- when it is determined the result of the decoding of the first time slot does not identify one of the plurality of modulation types as the modulation type of the received signal, decoding the received signal as a type-B modulated signal for a second time slot corresponding to the duration and selecting the modulation type of the received signal based on a result of the decoding of the second time slot as a type-B modulated signal.
1 more element
A method comprising:
- selecting a modulation type of a received signal by:
- decoding the received signal as a type-B modulated signal for a first time slot corresponding to a duration of a symbol;
- determining when a result of the decoding of the first time slot identifies one of a plurality of modulation types as the modulation type of the received signal and when it is determined the result of the decoding of the first time slot identifies one of the plurality of modulation types, selecting the identified modulation type as the modulation type of the received signal;
- and
- when it is determined the result of the decoding of the first time slot does not identify one of the plurality of modulation types as the modulation type of the received signal, decoding the received signal as a type-B modulated signal for a second time slot corresponding to the duration and selecting the modulation type of the received signal based on a result of the decoding of the second time slot as a type-B modulated signal;
- and
- decoding the received signal using the selected modulation type.
4 more elements
Dependencies are inferred from the claim text.