Title:
SPREAD SPECTRUM SIGNAL DECODER
Document Type and Number:
Japanese Patent JP3391064
Kind Code:
B2
Abstract:
PURPOSE: To obtain a spread spectrum signal decoder capable of accurately detecting the edge timing of demodulated data.
CONSTITUTION: An exclusive-OR circuit 4 and a digital carrier generator 5 eliminate a carrier component from a received signal that is a spread spectrum signal. A C/A code generator 6 generates a C/A code as a prescribed periodic signal. A digital correlator 7 inputs the received signal from which the carrier component is eliminated by the exclusive-OR circuit 4, and the C/A code by the C/A code generator 6, and measures the correlation values of both signals sequentially at every measuring time in which a C/A code period is bisected. A controller 8 sets the correlation value in the measuring time other than that equivalent to a C/A code phase out of a set of correlation values by the digital correlator 7 as the correlation value including a data component in a section of time of 1msec. Also, the controller 8 detects the edge timing of the demodulated data based on the correlation value.
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Inventors:
Takayuki Kamiya
Hiroyuki Kitagawa
Hiroyuki Kitagawa
Application Number:
JP28361393A
Publication Date:
March 31, 2003
Filing Date:
November 12, 1993
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H04B1/707; H04B1/7073; H04B7/216; (IPC1-7): H04B1/707; H04B7/216
Domestic Patent References:
| JP62159271A | ||||
| JP4302234A | ||||
| JP2111131A |
Attorney, Agent or Firm:
Hironobu Onda
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