WBFM Receive: Difference between revisions
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== Parameters == | == Parameters == | ||
; | ; Channel Rate | ||
: Input sample rate of complex baseband input. (float) | : Input sample rate of complex baseband input. (float) | ||
; Audio Decimation | ; Audio Decimation | ||
: How much to decimate | : How much to decimate Channel Rate to get to audio. (integer) | ||
; Deviation | |||
: FM modulation deviation. Standard broadcast FM uses 75kHz | |||
; Audio Pass | |||
: Low pass filter rolloff frequency | |||
; Audio Stop | |||
: Low pass filter cutoff frequency | |||
; Gain | |||
: Audio gain | |||
; Tau | |||
: Equalization - typically 75e-6 | |||
== Example Flowgraph == | == Example Flowgraph == | ||
Revision as of 16:25, 17 May 2020
Hierarchical block for demodulating a broadcast FM signal.
The input is the downconverted complex baseband signal (gr_complex).
The output is the demodulated audio (float).
Compared to WBFM Receive PLL, this one does a simple mono demodulation with deemphasis
Parameters
- Channel Rate
- Input sample rate of complex baseband input. (float)
- Audio Decimation
- How much to decimate Channel Rate to get to audio. (integer)
- Deviation
- FM modulation deviation. Standard broadcast FM uses 75kHz
- Audio Pass
- Low pass filter rolloff frequency
- Audio Stop
- Low pass filter cutoff frequency
- Gain
- Audio gain
- Tau
- Equalization - typically 75e-6
Example Flowgraph
Implementing an FM broadcast band receiver is really easy with the WBFM Receive Block.
Source Files
- Python files
- [1]
- Block definition
- [2]