JPS5533335A - Signaling signal detection system - Google Patents

Signaling signal detection system

Info

Publication number
JPS5533335A
JPS5533335A JP10547778A JP10547778A JPS5533335A JP S5533335 A JPS5533335 A JP S5533335A JP 10547778 A JP10547778 A JP 10547778A JP 10547778 A JP10547778 A JP 10547778A JP S5533335 A JPS5533335 A JP S5533335A
Authority
JP
Japan
Prior art keywords
signal
filter
signaling
fdm
multiplication
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.)
Pending
Application number
JP10547778A
Other languages
Japanese (ja)
Inventor
Shuzo Morita
Yoshinobu Fujii
Haruo Moritomo
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP10547778A priority Critical patent/JPS5533335A/en
Publication of JPS5533335A publication Critical patent/JPS5533335A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H04J4/005—Transmultiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To realize the signaling signal detection system optimum to the FDM- TDM multiplication equivalence conversion system by securing nearly an equal setting value to both arithmetic process time of the multiplied filter and the delay time of the delay means. CONSTITUTION:The signal A containing the signaling signal S and received the frequency multiplication FDM undergoes A/D conversion 11 to be turned into digital FDM signal B. For signal B, each channel is extracted individually through sample thinning filter 12, thus obtaining signal C containing the noise component. Signal C is then supplied to multiplied filter 13 featuring sharp properties D for removal of signal S and extraction of only the aural signal area, thus delivering signal E. Then signal C is applied to delay circuit 15 featuring nearly the same delay time as that of filter 13 to deliver signal F. With application of signals E anf F to subtractor circuit 16, the aural signal area is removed to obtain signal G. Then only the signaling component of signal G is extracted via filter 17 to obtain signal I. While signal E delivers the TDM signal via the real number part extraction and multiplication part 14.
JP10547778A 1978-08-31 1978-08-31 Signaling signal detection system Pending JPS5533335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10547778A JPS5533335A (en) 1978-08-31 1978-08-31 Signaling signal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10547778A JPS5533335A (en) 1978-08-31 1978-08-31 Signaling signal detection system

Publications (1)

Publication Number Publication Date
JPS5533335A true JPS5533335A (en) 1980-03-08

Family

ID=14408663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10547778A Pending JPS5533335A (en) 1978-08-31 1978-08-31 Signaling signal detection system

Country Status (1)

Country Link
JP (1) JPS5533335A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56143728A (en) * 1980-04-10 1981-11-09 Nec Corp Detecting circuit for out-band signal or noise

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56143728A (en) * 1980-04-10 1981-11-09 Nec Corp Detecting circuit for out-band signal or noise

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