Method and apparatus for estimating speed of a mobile station in

Details Method and apparatus for estimating speed of a mobile station in Method and apparatus for estimating speed of a mobile station in

1996-11-27

1999-03-16

Vo, Nguyen

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455456, 455422, 455436, G01S 1308, H04Q 704

Patent

active

058841784

ABSTRACT:
A method and apparatus takes into account the Doppler shift of the information in a received burst, a frequency offset value is calculated for each received burst. For each burst, a signal quality value is calculated, which is compared with a predetermined signal quality threshold level. The absolute value of each of the frequency offset values whose signal quality value meets or exceeds the predetermined signal quality threshold is obtained. The frequency offset values whose signal quality values do not meet the threshold level are disregarded. The total mean of all of the absolute frequency offset values is then calculated. The total mean value is used to accurately estimate the speed of the mobile station. Consequently, the speed of faster and slower mobile stations can be readily distinguished, and a hierarchical cell structure can be effectively used to increase capacity and reduce handovers in a cellular communications system.

REFERENCES:
patent: 4893317 (1990-01-01), Critchlow et al.
patent: 5136616 (1992-08-01), Dent
patent: 5161248 (1992-11-01), Bertiger et al.
patent: 5297165 (1994-03-01), Ueda et al.
patent: 5394158 (1995-02-01), Chia
patent: 5396253 (1995-03-01), Chia
patent: 5432822 (1995-07-01), Kaewell, Jr.
patent: 5513221 (1996-04-01), Parr et al.
patent: 5657487 (1997-08-01), Doner
patent: 5659545 (1997-08-01), Sowles et al.

Affiliated with

Also associated with

Rating

Method and apparatus for estimating speed of a mobile station in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for estimating speed of a mobile station in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for estimating speed of a mobile station in will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-826580