New answers tagged dsp
2
This is a basic question and needs an answer.
Regenerative receiver or audion. Single LC-filter with undamping: Q-multiplier. The frequency transfer of such a filter can be obtained from a simulation. See figure. As you can see: the AM demodulated audio response is affected when selectivity is too high. The example shows 1 MHz mediumwave. Audio bandwidth of ...
2
A low-pass filter is one way to do it. Due to the interpolation done in the repeat block, you are representing a symbol with 1000 samples, and your sample rate is 2 million samples per second (the samp_rate variable). So your square wave has a frequency of:
$$ \require{cancel}
{2000000\ \cancel{\text{samples}} \over \text{second}}
{1\ \text{symbol} \over ...
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