Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Patent
1996-07-26
1998-11-24
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
327554, 327 94, 327403, 327361, 36472411, H03K 500, H03K 1200, G11C 2702
Patent
active
058413154
ABSTRACT:
An object of the present invention is to provide a matched filter circuit of small size and consuming low electric power. Paying attention that a spreading code is a 1 bit data string, an input signal is sampled and held as an analog signal along the time sequence, classified into "1" and "-1" and the classified signals are added in parallel by capacitive coupling in a matched filter circuit according to the present invention.
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D. Fenna "Free Filter For Serial Data", Electronic Product Design, p. 22, Mar. 1982.
Ogawa et al., "Development of 1 Chip SS Communication LSI Using Digital Matched Filters", Technical Report of IECE, ISEC94-42, SST94-65 (1994-12), pp. 33-38.
"Dual 64-Tap, 11 Mcps, Digital Matched Filter/Correlator", STEL-3310, Stanford Telecommunications.
Nauerz et al., "The Suitability of Modern CMOS Gate Array Circuits as Corelators and Matched Filters for Spread-Spectrum Signals", IEEE, vol. 2 of 3, pp. 473-478, 1987.
Lin Shengmin
Motohashi Kazunori
Qin Xiaoling
Shou Guoliang
Takatori Sunao
Le Dinh
Sharp Kabushiki Kaisha
Tran Toan
Yozan Inc.
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