Title:
MOBILE TERMINAL POSITION MEASUREMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2005/041602
Kind Code:
A1
Abstract:
There is provided a radio base station device capable of improving a first path detection probability even if the radio transmission path fluctuates due to fading or the like, downsizing a mobile terminal device, and reducing the cost. SIR estimation units (13-1 to 13-N) calculate a reception SIR for each sub-carrier from the output of pilot demodulation units (12-1 to 12-n). A SIR averaging unit (14) calculates an average of the SIR for each sub-carrier and calculates the SIR of the entire signal. According to the SIR calculated, a threshold value setting unit (15) sets a threshold value for path search operation. A first path detection unit (19) performs path search according to the threshold value set by the threshold value setting unit (15). An arrival time calculation unit (21) calculates the arrival time according to the first path detected by the first path detection unit (19).
Inventors:
INABA ARATA (JP)
Application Number:
PCT/JP2004/013422
Publication Date:
May 06, 2005
Filing Date:
September 15, 2004
Export Citation:
Assignee:
NEC CORP (JP)
INABA ARATA (JP)
INABA ARATA (JP)
International Classes:
H04B1/707; H04B1/7075; H04W64/00; (IPC1-7): H04Q7/34
Foreign References:
| JP2002040121A | 2002-02-06 | |||
| JP2000252954A | 2000-09-14 | |||
| EP1204234A2 | 2002-05-08 |
Attorney, Agent or Firm:
Miyazaki, Teruo (16th Kowa Bldg. 9-20, Akasaka 1-chom, Minato-ku Tokyo, JP)
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