Title:
順方向リンク中継器周波数透かし入れシステム
Document Type and Number:
Japanese Patent JP4382806
Kind Code:
B2
Abstract:
A forward link repeater frequency watermarking (FLRFWM) system and method that enable accurate position location of mobile stations in areas where repeaters are present by watermarking repeated signals with repeater information. A repeater watermarks a forward link signal with a (unique or non-unique) fast frequency modulation waveform watermark every time a signal passes through the repeater. A mobile station detects and/or identifies the fast frequency watermark on the forward link signal to determine repeater information that aids the network position determination entity or mobile station position location system in determining position location using AFLT and/or A-GPS systems. A forward link fast frequency watermarking system described herein achieves minimal impact on FL, AFLT, and GPS performance, good detection, identification and false alarm probabilities, short time-to-detect/identify, and good detection/identification sensitivity.
Inventors:
Simiku, Emilia
Patrick, Christopher
Patrick, Christopher
Application Number:
JP2006503857A
Publication Date:
December 16, 2009
Filing Date:
February 23, 2004
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04W16/26; G01S1/00; G01S5/02; G01S19/06; G01S19/25; H04B7/15; H04B7/26; H04W12/02; H04Q7/38
Domestic Patent References:
| JP2004501585A |
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama