专利名称：System and method for recovering system
time in direct sequence spread spectrumcommunications
发明人：John G. McDonough,Juncheng C. Liu,Yan
Hui,Chunhao Chen
申请号：US09883740申请日：20010618
公开号：US20030043766A1公开日：20030306
专利附图：
摘要：A sleep control system and method are provided that permit a reference clock
and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver tobe turned off and turned back on at arbitrary points in time while still maintainingaccurate base station system time. Accurate timing is made possible through a number oftechniques including precise initial calibration using a rising edge/falling edge averagingsystem, determining the sleep clock and reference clock frequencies, and the
determination of the frequency drift of the sleep clock that occurred during the previoussleep interval.
申请人：MCDONOUGH JOHN G.,LIU JUNCHENG C.,HUI YAN,CHEN CHUNHAO
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