Preamble detection mechanism for reception of asynchronous packets
AssigneeNXP USA, Inc.
InventorsMihai-Ionut Stanciu, Khurram Waheed
Life of this patent
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Abstract
Processing of a data packet within a received wireless signal includes determining a frequency modulation (“FM”) domain carrier frequency offset (“CFO”) estimate component from a plurality of samples of the received wireless signal, determining a phase domain CFO estimate component from the plurality of samples of the received wireless signal, and determining a CFO estimation as a function of the FM domain CFO estimate component and the phase domain CFO estimate component. The data packet may be a Bluetooth Low Energy data packet. The FM domain CFO estimate component and the phase domain CFO estimate component may be determined from samples of a preamble field of the data packet.
Claims20
A method for processing a data packet within a received wireless signal, the method comprising:
- determining a frequency modulation (“FM”) domain carrier frequency offset (“CFO”) estimate component from a plurality of samples of the received wireless signal;
- determining a phase domain CFO estimate component from the plurality of samples of the received wireless signal;
- and
- determining a CFO estimation as a function of the FM domain CFO estimate component and the phase domain CFO estimate component.
A communications device comprising:
- receiver circuitry configured to receive a signal containing a data packet;
- packet synchronization circuitry comprising:
- a first CFO estimator component configured to determine a frequency modulation (“FM”) domain carrier frequency offset (“CFO”) estimate component from samples of the received signal,
- a second CFO estimator component configured to determine a phase domain CFO estimate component from the samples of the received signal, and
- circuitry configured to determine a CFO estimation as a function of the FM domain CFO estimate component and the phase domain CFO estimate component;
- and
- CFO correction circuitry configured to compensate processing of the received signal utilizing the CFO estimation.
A computer program product comprising a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising:
- computer readable program code configured to determine a frequency modulation (“FM”) domain carrier frequency offset (“CFO”) estimate component from samples of a received radio frequency (“RF”) signal containing a Bluetooth Low Energy data packet;
- computer readable program code configured to determine a phase domain CFO estimate component from the samples of the received RF signal;
- and
- computer readable program code configured to determine a CFO estimation as a function of the FM domain CFO estimate component and the phase domain CFO estimate component.
Dependencies are inferred from the claim text.