TW240361B - Digital signal demodulation and filter - Google Patents
Digital signal demodulation and filterInfo
- Publication number
- TW240361B TW240361B TW83107841A TW83107841A TW240361B TW 240361 B TW240361 B TW 240361B TW 83107841 A TW83107841 A TW 83107841A TW 83107841 A TW83107841 A TW 83107841A TW 240361 B TW240361 B TW 240361B
- Authority
- TW
- Taiwan
- Prior art keywords
- signal
- demodulation
- envelope
- device used
- amplitude
- Prior art date
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
A amplitude shift keying digital signal demodulation and filtering system used to demodulate the channel signal modulated by amplitude shift keying to remove amplitude carrier and filtering amplitude noise interference, and removing the distortion and attenuation of signal resulting from channel effect, and outputting the final digital demodulation signal, includes: 1. amplitude demodulation device used for demodulate the channel signal to remove amplitude carrier, and outputting one demodulation envelope signal; 2. post-demodulation high envelope detecting device used for positive detecting the demodulation envelope signal to generate high envelope detection signal of demodulation envelope signal; 3. post-demodulation low envelope detecting device used for negative detecting the demodulation envelope signal to generate low envelope detection signal of demodulation envelope signal; 4. DC voltage device used for generating one constant DC voltage signal and one synthesized threshold signal composed by high envelope detection signal, low envelope detection signal and DC voltage signal; 5. comparing device used for comparing the demodulation envelope signal and synthesized threshold signal, and outputting the final digital demodulation output signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW83107841A TW240361B (en) | 1994-08-26 | 1994-08-26 | Digital signal demodulation and filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW83107841A TW240361B (en) | 1994-08-26 | 1994-08-26 | Digital signal demodulation and filter |
Publications (1)
Publication Number | Publication Date |
---|---|
TW240361B true TW240361B (en) | 1995-02-11 |
Family
ID=51400867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW83107841A TW240361B (en) | 1994-08-26 | 1994-08-26 | Digital signal demodulation and filter |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW240361B (en) |
-
1994
- 1994-08-26 TW TW83107841A patent/TW240361B/en active
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