Detects a plateau and marks the middle. More...
#include <plateau_detector_fb.h>
Public Types | |
| typedef boost::shared_ptr < plateau_detector_fb > | sptr |
Static Public Member Functions | |
| static sptr | make (int max_len, float threshold=0.9) |
Detailed Description
Detects a plateau and marks the middle.
Detect a plateau of a-priori known height. Input is a stream of floats, the output is a stream of bytes. Whenever a plateau is detected, the middle of that plateau is marked with a '1' on the output stream (all other samples are left at zero).
You can use this in a Schmidl & Cox synchronisation algorithm to interpret the output of the normalized correlator. Just pass the length of the cyclic prefix (in samples) as the max_len parameter).
Unlike the peak detectors, you must the now the absolute height of the plateau. Whenever the amplitude exceeds the given threshold, it starts assuming the presence of a plateau.
An implicit hysteresis is provided by the fact that after detecting one plateau, it waits at least max_len samples before the next plateau can be detected.
Member Typedef Documentation
Member Function Documentation
| static sptr gr::blocks::plateau_detector_fb::make | ( | int | max_len, |
| float | threshold = 0.9 |
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| ) | [static] |
- Parameters:
-
max_len Maximum length of the plateau threshold Anything above this value is considered a plateau
The documentation for this class was generated from the following file:
