TW240361B - Digital signal demodulation and filter - Google Patents

Digital signal demodulation and filter

Info

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
Application number
TW83107841A
Other languages
Chinese (zh)
Inventor
Shyh-Wey Hwang
Original Assignee
Chaw Khong 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 Chaw Khong Co Ltd filed Critical Chaw Khong Co Ltd
Priority to TW83107841A priority Critical patent/TW240361B/en
Application granted granted Critical
Publication of TW240361B publication Critical patent/TW240361B/en

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.
TW83107841A 1994-08-26 1994-08-26 Digital signal demodulation and filter TW240361B (en)

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)

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