Difference between revisions of "WBFM Receive"
From GNU Radio
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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 | ||
| + | : Preemphasis time constant (float) - typically 75e-6 | ||
== Example Flowgraph == | == Example Flowgraph == | ||
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Implementing an FM broadcast band receiver is really easy with the WBFM Receive Block. | Implementing an FM broadcast band receiver is really easy with the WBFM Receive Block. | ||
| − | [[File: | + | [[File:Broadcast_FM_fg.png|800px]] |
== Source Files == | == Source Files == | ||
Latest revision as of 15:38, 20 August 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[edit]
- 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
- Preemphasis time constant (float) - typically 75e-6
Example Flowgraph[edit]
Implementing an FM broadcast band receiver is really easy with the WBFM Receive Block.
Source Files[edit]
- Python files
- [1]
- Block definition
- [2]
