WBFM Receive: Difference between revisions
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| (2 intermediate revisions by one other user not shown) | |||
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; Deviation | ; Deviation | ||
: FM modulation deviation. Standard broadcast | : FM modulation deviation. Standard FM broadcast uses 75 kHz | ||
; Audio Pass | ; Audio Pass | ||
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; Tau | ; Tau | ||
: | : Preemphasis time constant (float) - typically 75e-6 (US) or 50e-6 (Europe) | ||
== 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 18:07, 22 August 2023
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 FM broadcast uses 75 kHz
- 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 (US) or 50e-6 (Europe)
Example Flowgraph
Implementing an FM broadcast band receiver is really easy with the WBFM Receive Block.
Source Files
- Python files
- [1]
- Block definition
- [2]