Code distinguishing apparatus

Details Code distinguishing apparatus Code distinguishing apparatus

2007-09-04

2007-09-04

Tse, Young T. (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S150000

Reexamination Certificate

active

10785056

ABSTRACT:
A unique word that can be contained in transmittal data is to be accurately distinguished. A correlation detecting section36calculates correlations A through N between received data containing one of a plurality of unique words A through N and the unique words A through N respectively characteristic of the information transmission rates A through N. For the unique words A through N, the thresholds A through N are respectively set, and a formula distinguishing section342, when a correlation i (i is one of A through N) is above a threshold i, a unique word i is contained in the received data, and supplies formula type data indicating that the received data have been generated at an information transmission rate i matching the unique word i. A threshold altering section380, upon distinguishment of a unique word, performs alteration to reduce a value of the threshold i and enlarge values of other thresholds.

REFERENCES:
patent: 5838721 (1998-11-01), Chau et al.
patent: 6990140 (2006-01-01), Loomis et al.
patent: 2001/0050950 (2001-12-01), Sato
patent: A 5-7195 (1993-01-01), None
patent: A 11-196026 (1999-07-01), None
patent: A 2002-148326 (2002-05-01), None
Masakazu Sampei, “Application of Digital Wireless Transmission for Digital Wireless Communications,” Pearson Education Japan, Sep. 1, 2002, pp. 298-299.
http://libl.nippon-foundation.or.jp/1998/0478/contents/076.htm.

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