METHOD AND APPARATUS FOR PREAMBLE SYNCHRONIZATION IN WIRELESS RADIO FREQUENCY IDENTIFICATION (RFID) SYSTEMS
摘要
<p>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.</p>
申请公布号
WO2007037956(A2)
申请公布日期
2007.04.05
申请号
WO2006US35247
申请日期
2006.09.11
申请人
SYMBOL TECHNOLOGIES, INC.;OKUNEV, YURI;MAIZENBERG, VALERY