But the capture processes of digital video introduce noises unavoidably 在視頻采集過程中,噪聲信號的引入是不可避免的。
During the automatic data capture process , the epc number is read by an rfid reader via electromagnetic waves and the number is passed on to the epc middleware 在自動數(shù)據(jù)收集過程中,射頻識別閱讀機通過無線電波讀取電子產品碼編號后,將數(shù)據(jù)傳輸至電子產品碼中介軟件。
During the automatic data capture process , the epc number is read by an rfid reader via electromagnetic waves and the number is passed on to the epc middleware 在自動數(shù)據(jù)收集過程中,射頻識別閱讀機通過無線電波讀取電子產品碼編號后,將數(shù)據(jù)傳輸至電子產品碼中介軟件。
Wide doppler range . varied code length , varied code rate , which have more difficulties . little acquisition time and high acquisition probability are required during the capturing process of spread spectrum signals 對高動態(tài)、高碼率、低信噪比、大多普勒及變化的碼長和碼率的擴頻信號的快捕是本文的難點。