Loading...
Please wait, while we are loading the content...
Similar Documents
Advanced study of video signal processing in low signal to noise environments (Document No: 19740013077)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Carden, F. |
| Copyright Year | 1973 |
| Description | Conventional analytical techniques used to determine and optimize phase-lock loop (PLL) characteristics are most often based on a model which is valid only if the intermediate frequency (IF) filter bandwidth is large compared to the PLL bandwidth and the phase error is small. An improved model (called the quasi-linear model) is developed which takes into account small IF filter bandwidths and nonlinear effects associated with large phase errors. By comparison of theoretical and experimental results it is demonstrated that the quasi-linear model accurately predicts PLL characteristics. This is true even for small IF filter bandwidths and large phase errors where the conventional model is invalid. The theoretical and experimental results are used to draw conclusions concerning threshold, multiplier output variance, phase error variance, output signal-to-noise ratio, and signal distortion. The relationship between these characteristics and IF filter bandwidth, modulating signal spectrum, and rms deviation is also determined. |
| File Size | 1579124 |
| Page Count | 101 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740013077 |
| Archival Resource Key | ark:/13960/t2v45h06g |
| Language | English |
| Publisher Date | 1973-12-01 |
| Access Restriction | Open |
| Subject Keyword | White Noise Signal Processing Frequency Modulation Bandpass Filters Phase Locked Systems Signal To Noise Ratios Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
