CDMA及びGPSシステムのための多重初期サーチの方法

Japanese Patent JP4504020

B2

Searcher hardware is multiplexed to perform simultaneous searches in either an IS-95 CDMA mode or a GPS mode. In the IS-95 mode, the search hardware is time-multiplexed into a number of searcher time slices, each of which can generate a PN sequence to despread a data sequence. In the GPS mode, the search hardware is configured as a number of distinct GPS channels, each of which can generate a Gold code sequence for tracking a GPS signal from a particular GPS satellite. This configuration allows the searcher to perform multiple GPS signal searches simultaneously. Signal searching in both IS-95 and GPS modes is performed at significantly higher speeds compared to conventional searcher hardware. Moreover, the search hardware can be dynamically configured to operate in either the IS-95 or the GPS mode, eliminating the need for dedicated circuitry for each mode of operation.

WO/1999/018677	GPS AUGMENTATION SYSTEM
WO/2002/096054	METHOD AND APPARATUS FOR COMPUTING SIGNAL CORRELATION

Poon, One Paul
Elephant, Kyugen

JP2003559040A

July 14, 2010

January 03, 2003

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QUALCOMM INCORPORATED

G01S1/00; G01S19/25; G01S19/30; G01S19/37; H04B1/708; H04W36/00; H04W48/16; H04W64/00; H04W88/02; G01S19/34; H04B1/7075

JP2001223613A

WO2001047135A1
WO2000059123A1

Takehiko Suzue
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen

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