JPS6471365A - Noise detecting method for digital radio equipment - Google Patents

Noise detecting method for digital radio equipment

Info

Publication number
JPS6471365A
JPS6471365A JP62229041A JP22904187A JPS6471365A JP S6471365 A JPS6471365 A JP S6471365A JP 62229041 A JP62229041 A JP 62229041A JP 22904187 A JP22904187 A JP 22904187A JP S6471365 A JPS6471365 A JP S6471365A
Authority
JP
Japan
Prior art keywords
output
intermediate frequency
signal
noise
detecting method
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
JP62229041A
Other languages
Japanese (ja)
Inventor
Satoshi Shimizu
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62229041A priority Critical patent/JPS6471365A/en
Publication of JPS6471365A publication Critical patent/JPS6471365A/en
Pending legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To contrive to save a discrimination circuit by using an intermediate frequency signal to evaluate the S/N of a digital reception signal. CONSTITUTION:An output of a main filter 11 of a receiver is connected to an intermediate frequency amplifier 12 and a limiter 13 and part of the output of the limiter 13 is connected to a demodulator and the remaining signal is subjected to intermediate frequency component rejection by a band pass filter 14, amplified to a level detectable by a low-frequency amplifier 15 and noise is detected by a detection circuit 16. The detected noise voltage is compared with a comparison voltage Vref of a comparator 17 to apply noise control by an output of the comparator 17. Thus, the control voltage corresponding to the error rate of the digital signal is obtained.
JP62229041A 1987-09-11 1987-09-11 Noise detecting method for digital radio equipment Pending JPS6471365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62229041A JPS6471365A (en) 1987-09-11 1987-09-11 Noise detecting method for digital radio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62229041A JPS6471365A (en) 1987-09-11 1987-09-11 Noise detecting method for digital radio equipment

Publications (1)

Publication Number Publication Date
JPS6471365A true JPS6471365A (en) 1989-03-16

Family

ID=16885816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62229041A Pending JPS6471365A (en) 1987-09-11 1987-09-11 Noise detecting method for digital radio equipment

Country Status (1)

Country Link
JP (1) JPS6471365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004280793A (en) * 2003-03-18 2004-10-07 Microsoft Corp Method for evaluating signal from radio computer peripheral device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004280793A (en) * 2003-03-18 2004-10-07 Microsoft Corp Method for evaluating signal from radio computer peripheral device

Similar Documents

Publication Publication Date Title
US6229997B1 (en) Interference detecting receiver
EP0208530B1 (en) Squelch detecting circuit with squelch start determining means
CA1196966A (en) Interference wave detection circuit for use in radio receiver
ES8608756A1 (en) Noise detector.
US5444862A (en) Circuit for stopping data transmission responding to low level and rapid fall of received electric field
JPS6471365A (en) Noise detecting method for digital radio equipment
US4206410A (en) Automatic frequency control system for single sideband signal receiver
JPS5787639A (en) Am stereo receiver
JPS54157017A (en) Fm signal receiving circuit
JPS56146381A (en) Television voice receiving device
JPS5769982A (en) Audio reception circuit for television receiver
JPS5791039A (en) Fm receiver
JPS57198511A (en) Detecting method for dropout
JPS56110347A (en) Am receiver
JPS56149128A (en) Radio receiver for vehicle
JPS5718139A (en) In-band signal detecting device
JPS57125542A (en) Multi-path distortion detector for fm radio receiver
JPS566542A (en) Muting system for fm radio receiver
JPS57186842A (en) Demodulator of frequency-modulated receiver
SU615610A1 (en) Device for monitoring s/n ratio in occupied communication channel with binary manipulation
JPS55140337A (en) Intermodulation disturbance improving circuit of radio receiver
JPS5791457A (en) Frequency analyzer
JPS56106435A (en) Fm receiver
GB1453945A (en) Frequency tracking receivers
JPS57190427A (en) Squelch system of radio receiver