Title:
CDMA通信システムにおける移動加入者局の位置特定方法およびシステム
Document Type and Number:
Japanese Patent JP3765984
Kind Code:
B2
Abstract:
The present inventation provides a base station comprising:
a plurality of antennas, each of the antennas separated by a known distance;
means for transmitting a first spread spectrum signal having a first code;
means for receiving, using the plurality of antennas, a second spread spectrum signal having a second code, the second spread spectrum signal time synchronized with the first spread spectrum signal;
means for making a distance determination based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station's transmitted first spread spectrum signal;
means for comparing a phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas; and
means for determining an angle of the received second spread spectrum signal using the known distance between the antennas and the phase difference; and
means for determining a location of a source of the second spread spectrum signal using the determined angle and the distance determination.
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Inventors:
Mesecher, David Kay.
Application Number:
JP2000607432A
Publication Date:
April 12, 2006
Filing Date:
September 03, 1999
Export Citation:
Assignee:
Interdigital Technology Corporation
International Classes:
G01S5/12; G01S19/35; G01S19/37; H04B7/216; H04W64/00
Domestic Patent References:
| JP10322752A | ||||
| JP2001500256A |
Attorney, Agent or Firm:
Shin Uchihara