TW355749B - Pyramid approximation envelope detection method and circuit this invention applies pyramid approximation in envelope detection method and designs a circuit for it - Google Patents
Pyramid approximation envelope detection method and circuit this invention applies pyramid approximation in envelope detection method and designs a circuit for itInfo
- Publication number
- TW355749B TW355749B TW086119678A TW86119678A TW355749B TW 355749 B TW355749 B TW 355749B TW 086119678 A TW086119678 A TW 086119678A TW 86119678 A TW86119678 A TW 86119678A TW 355749 B TW355749 B TW 355749B
- Authority
- TW
- Taiwan
- Prior art keywords
- circuit
- envelope detection
- detection method
- pyramid
- approximation
- Prior art date
Links
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Image Processing (AREA)
Abstract
A pyramid approximation envelope detection method and circuit, especially the envelope detection used in wideband communication, receiver demodulation and wave generation; this method relies on pyramid approximation to simplify circuit structure in cost reduction, while limiting maximum error within 0.6%; the main equation for the summed square root value (Z) of the envelope detection are approximated by six facets of the pyramid, each containing the origin and at 45 degrees with the horizontal plane; the X, Y and summed square root value (Z) can thus easily be obtained; the corresponding circuit comprises only absolute-value circuit, max/min-value circuit, digital comparator, encoder, small-capacity ROM and a multiplier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW086119678A TW355749B (en) | 1997-12-24 | 1997-12-24 | Pyramid approximation envelope detection method and circuit this invention applies pyramid approximation in envelope detection method and designs a circuit for it |
| TW086119678A TW461968B (en) | 1997-12-24 | 1999-10-25 | Pyramid approximation wave-packet detection method and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW086119678A TW355749B (en) | 1997-12-24 | 1997-12-24 | Pyramid approximation envelope detection method and circuit this invention applies pyramid approximation in envelope detection method and designs a circuit for it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW355749B true TW355749B (en) | 1999-04-11 |
Family
ID=21627475
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW086119678A TW355749B (en) | 1997-12-24 | 1997-12-24 | Pyramid approximation envelope detection method and circuit this invention applies pyramid approximation in envelope detection method and designs a circuit for it |
| TW086119678A TW461968B (en) | 1997-12-24 | 1999-10-25 | Pyramid approximation wave-packet detection method and circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW086119678A TW461968B (en) | 1997-12-24 | 1999-10-25 | Pyramid approximation wave-packet detection method and circuit |
Country Status (1)
| Country | Link |
|---|---|
| TW (2) | TW355749B (en) |
-
1997
- 1997-12-24 TW TW086119678A patent/TW355749B/en not_active IP Right Cessation
-
1999
- 1999-10-25 TW TW086119678A patent/TW461968B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TW461968B (en) | 2001-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1318600A3 (en) | Distortion compensating circuit for compensating distortion occurring in power amplifier | |
| AU3996599A (en) | Method of communications in a backscatter system interrogator, and backscatter communications system | |
| EP0946050A3 (en) | Method and apparatus for converting color data | |
| ATE298474T1 (en) | DISTORTION CORRECTION CIRCUIT OF A DIRECT CONVERSION RECEIVER | |
| EP0913955A3 (en) | Transmission network and filter therefor | |
| AU2001240599A1 (en) | Flexible metal substrate for cis solar cells, and method for producing the same | |
| EP0758823A3 (en) | Spread spectrum communication system | |
| EP0813345A3 (en) | Digital demodulator and method therefor | |
| EP0891066A3 (en) | Adaptable menu-controlled man-machine interface. | |
| WO2003026140A3 (en) | Multi-band/multi-mode satellite radiotelephone communications systems and methods | |
| EP1333624A3 (en) | Method and apparatus for checking continuity of leaf-to-root VLAN connections | |
| WO2004019540A3 (en) | Crest factor reduction processor for wireless communications | |
| EP1037442A3 (en) | OFDM communication apparatus | |
| EP0372566A3 (en) | Reciprocal arithmetic circuit with rom table | |
| EP0847153A3 (en) | Method and apparatus for measuring waveform quality of CDMA signal | |
| EP0369720A3 (en) | Color image processing apparatus | |
| AU1240700A (en) | Vsat satellite telecommunications system | |
| TW355749B (en) | Pyramid approximation envelope detection method and circuit this invention applies pyramid approximation in envelope detection method and designs a circuit for it | |
| EP0794638A3 (en) | Differential detection receiver | |
| AU1262895A (en) | Conductive polymer curable cathode paste and electrolytic cells produced therefrom | |
| EP0800266A3 (en) | Digital FM demodulator | |
| EP0930728A3 (en) | Digital optical transmission apparatus and method for performing ASK modulation to generate base band component with constant DC level | |
| EP1050969A3 (en) | System and method for logarithmic digital to analog conversion | |
| EP0837340A3 (en) | Estimator of direction of desired signal | |
| WO2002013160A3 (en) | Electronic device, especially a field device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4A | Expiration of patent term of an invention patent |