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특허 상세정보

Methods and systems for synchronization with multiple frequency offsets and known timing relationships

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H04B-007/01   
미국특허분류(USC) 455/502 ; 370/324 ; 375/356
출원번호 US-0275060 (1999-03-23)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Myers Bigel Sibley & Sajovec
인용정보 피인용 횟수 : 10  인용 특허 : 12

Methods and systems are provided which store frequency settings before switching frequencies, for example, before assignment to the traffic channel when switching between a ground station and another mobile station), thus, making it possible to recall the previous frequency setting and then only perform a second pass of the synchronization process or no synchronization at all. By storing the frequency setting, either as an offset to a given frequency or as an absolute frequency for each system to be monitored, the stored frequency setting can be re-used ...


[ That which is claimed is:] [1.]1. A method of rapidly synchronizing a wireless device, utilizing a single reference frequency, to at least two received signals, the method comprising the steps of:determining a time varying phase offset between a first received signal from a first source device and the single reference frequency so as to provide a first received signal phase offset;determining a time varying phase offset between a second received signal from a second source device and the single reference frequency so as to provide a second received sig...

이 특허에 인용된 특허 (12)

  1. Dupuy Pierre,FRX ; Cherpantier Corinne,FRX ; Dobrosielski Max,FRX. Base transceiver station for cellular mobile radio system and system for synchronizing such base transceiver stations. USP2000066072847.
  2. Malcolm James Eryx ; Fraley Daniel ; Morris Adrian ; Roos David ; Swaminathan Kumar ; Kim Seok Ho ; Marquart Robert Carroll. Device and method for communicating in a mobile satellite system. USP1998075781540.
  3. Beukema Troy J. (2020 Hassell Rd. #205 Hoffman Estates IL 60195). Frequency synchronizing method for a reference oscillator. USP1996045509034.
  4. Chandos Ronald V. (Tempe AZ) Tayloe Daniel R. (Phoenix AZ). Method and apparatus for satellite handoff parameters prediction in an orbiting communications system. USP1996105561838.
  5. Rasky Phillip D. (Buffalo Grove IL) Kepler James F. (Buffalo Grove IL) Chiasson Gregory M. (Barrington IL). Method and apparatus for synchronizing a received signal in a digital radio communication system. USP1995065428647.
  6. Van der Putten Frank Octaaf,BEX ; Spruyt Paul Marie Pierre,BEX. Method to transparently transport an incoming clock signal over a network segment, and related transmitter and receiver unit. USP2000066072810.
  7. Sekine Kiyoki,JPX ; Kawabe Manabu,JPX ; Horiguchi Kenji,JPX. Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected. USP2001076259683.
  8. McCallister Ronald D.. Rapid synchronization for communication systems. USP2000036041088.
  9. Chennakeshu Sandeep (Cary NC) Hassan Amer A. (Cary NC) Molnar Barbara (Cary NC) Molnar Karl (Cary NC) Ramesh Rajaram (Cary NC). Satellite diversity scheme. USP1997085661724.
  10. Bilitza Herbert (Berlin DEX) Gartner Biegfried (Berlin DEX) Neuner Hermann (Berlin DEX). Synchronization method for a mobile radiotelephone. USP1995025390216.
  11. Moriya Masahiro. Synchronization recovery for a mobile telephone. USP2000056061409.
  12. Muntz Gary S. ; Jacobs Steven E. ; Fedorkow Guy. System and method for maintaining network synchronization utilizing digital phase comparison techniques with synchronous. USP1999045896427.