JPS6471365A - Noise detecting method for digital radio equipment - Google Patents
Noise detecting method for digital radio equipmentInfo
- Publication number
- JPS6471365A JPS6471365A JP22904187A JP22904187A JPS6471365A JP S6471365 A JPS6471365 A JP S6471365A JP 22904187 A JP22904187 A JP 22904187A 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
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22904187A 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 |
---|---|---|---|
JP22904187A 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 |
---|---|---|---|
JP22904187A 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)
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 |
-
1987
- 1987-09-11 JP JP22904187A patent/JPS6471365A/en active Pending
Cited By (1)
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 |
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