Wideband FM receiver » History » Version 3
ROQUE, Damien, 02/21/2015 12:26 AM
| 1 | 1 | ROQUE, Damien | h1. Wideband FM receiver |
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| 2 | 1 | ROQUE, Damien | |
| 3 | 3 | ROQUE, Damien | In this example, we present a monophonic "FM broadcasting":http://en.wikipedia.org/wiki/FM_broadcasting receiver developed with GNURadio. This fairly simple flowgraph illustrates filtering and rate conversions. Approximately 1/5 of the FM band is observed in the frequency domain thanks to the first frequency sink (several channels in use should be seen). The signal is then low-pass filtered and decimated in order to demodulate a single channel around the chosen center frequency. Frequency demodulation is performed thanks to a frequency discriminator (the block also includes a low-pass and deemphasis filters). After a volume control, the signal is then resampled according to the soundcard requirements. |
| 4 | 1 | ROQUE, Damien | |
| 5 | 2 | ROQUE, Damien | !rx_fm.grc.png! |