JPS5553948A - Digital signal detection system - Google Patents

Digital signal detection system

Info

Publication number
JPS5553948A
JPS5553948A JP12739478A JP12739478A JPS5553948A JP S5553948 A JPS5553948 A JP S5553948A JP 12739478 A JP12739478 A JP 12739478A JP 12739478 A JP12739478 A JP 12739478A JP S5553948 A JPS5553948 A JP S5553948A
Authority
JP
Japan
Prior art keywords
signals
threshold level
output
data
det
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12739478A
Other languages
Japanese (ja)
Other versions
JPS5947907B2 (en
Inventor
Kazuto Hirose
Hitoshi Imagawa
Yoshikatsu Shiraishi
Koichi Hasegawa
Takaaki Osaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP53127394A priority Critical patent/JPS5947907B2/en
Publication of JPS5553948A publication Critical patent/JPS5553948A/en
Publication of JPS5947907B2 publication Critical patent/JPS5947907B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE: To prevent the output phenomenon of the same number as before by deciding the presence of the signals through selection of one or two units of the larger output and at the same time judging the absence of the signals in other channels each in case the discrete Fourier conversion output exists in the range more than the prescribed fixed threshold level.
CONSTITUTION: The DET output calculated at the discrete Fourier conversion DET operation part is applied to the DET-OUT terminal. This data is then compared with the fixed threshold level stored in shift register 1. And in case the data is larger than the threshold level, the data stored in register 1 is transferred to shift registers 3 and 4 in the form of the comparison value. Then the smaller comparison value within registers 3 and 4 is detected to give the renewal to the contents of register 3 and 4. A comparison is given at comparator 14 between the input data and the threshold level to decide the presence or absence of the signals. And this comparison result is sent to the 2/3-majority circuit to have the final decision of the signals.
COPYRIGHT: (C)1980,JPO&Japio
JP53127394A 1978-10-18 1978-10-18 Digital signal detection method Expired JPS5947907B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53127394A JPS5947907B2 (en) 1978-10-18 1978-10-18 Digital signal detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53127394A JPS5947907B2 (en) 1978-10-18 1978-10-18 Digital signal detection method

Publications (2)

Publication Number Publication Date
JPS5553948A true JPS5553948A (en) 1980-04-19
JPS5947907B2 JPS5947907B2 (en) 1984-11-22

Family

ID=14958898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53127394A Expired JPS5947907B2 (en) 1978-10-18 1978-10-18 Digital signal detection method

Country Status (1)

Country Link
JP (1) JPS5947907B2 (en)

Also Published As

Publication number Publication date
JPS5947907B2 (en) 1984-11-22

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