Method and system for determining position of mobile radio termi

Details Method and system for determining position of mobile radio termi Method and system for determining position of mobile radio termi

1997-11-26

1999-12-28

Loomis, Paul

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455440, 342457, H04M 1100, G01S 302

Patent

active

06009334&

ABSTRACT:
A method and apparatus are disclosed for determining more accurately, in a radio environment with time dispersion, the distance between a radio receiver and radio transmitter, by special processing of received radio signals that have been transmitted repeatedly from the same radio transmitter and are possibly subject to multipath propagation. The Time of Arrival (TOA) of the received radio signals is repeatedly estimated using channel power profiles. A TOA value near the minimum occurring TOA is selected wherein each estimated TOA is derived from incoherent integration of a randomly chosen number of the received bursts having the same known bit sequence, in order to eliminate the influence of noise.

REFERENCES:
patent: 4433335 (1984-02-01), Wind
patent: 4488593 (1984-12-01), Friedman
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5512908 (1996-04-01), Herrick
patent: 5526357 (1996-06-01), Jandrell
patent: 5534876 (1996-07-01), Erickson et al.
patent: 5687196 (1997-11-01), Proctor

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