METHOD AND APPARATUS FOR ESTIMATING THE DOPPLER FREQUENCY OF A MOBILE STATION

ABSTRACT OF THE DISCLOSURE A method and apparatus for approximating the doppler frequency of a mobile station (M1-M9) by examining the signal between the mobile station (M1-M9) and a base station (B1-B10). Several channel estimates (hj(n)) are calculated at different intervals (t1, t2) for the signa...

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Bibliographische Detailangaben
Hauptverfasser:	DAHLMAN, BENGT E, WAHLSTROEM, LARS P, SANDELL, BENGT A, BAECKSTROEM, OLOF T
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	ABSTRACT OF THE DISCLOSURE A method and apparatus for approximating the doppler frequency of a mobile station (M1-M9) by examining the signal between the mobile station (M1-M9) and a base station (B1-B10). Several channel estimates (hj(n)) are calculated at different intervals (t1, t2) for the signal between the mobile station (M1-M9) and the base station (B1-B10). The difference (Vj(n)) between these channels estimates (hj(n)) is used to determine the approximate doppler frequency of the mobile station (M1-M9). A cellular mobile radio system can use the doppler frequency of the mobile station (M1-M9) to prioritize a handoff queue or to select an appropriate detecting algorithm for detecting data in a received signal (r(t)).