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METHOD AND APPARATUS FOR PREAMBLE SYNCHRONIZATION IN WIRELESS RADIO FREQUENCY IDENTIFICATION (RFID) SYSTEMS
METHOD AND APPARATUS FOR PREAMBLE SYNCHRONIZATION IN WIRELESS RADIO FREQUENCY IDENTIFICATION (RFID) SYSTEMS
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机译:无线无线电频率识别(RFID)系统中的预同步的方法和装置
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摘要
The present invention provides methods and apparatuses for detection of a preamble portion of a data packet. A plurality of samples are received in an input signal. Samples that occur between consecutive sign changes in the received plurality of samples are counted. The counting of samples is performed a number of times to produce a sequence of counts of samples between consecutive sign changes in the received plurality of samples. Matched filtering of the sequence of counts of samples is performed to determine whether a preamble is detected. Bit rate and timing are initialized for data decoding based on parameters of the sequence of sample counts of a detected preamble.
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