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I discussed Differential Modulation in this GR issue: https://github.com/gnuradio/gnuradio/issues/6074 There is the [PySDR differential coding](https://pysdr.org/content/digital_modulation.html#differential-coding) section that introduces this concept. However, at least in the GR context it'd be great...
The graphic in the Carrier and Downconversion section of [https://pysdr.org/content/sampling.html](https://pysdr.org/content/sampling.html) is unclear. The arrow describing "This is what we call the carrier" is pointing to the `cos(...`. This characterization implies?...
Good evening, I've been trying to work through the textbook and keep running into issues with two portions: Bandpass Filter: The code supplied works as a bandpass, but does not...
Thank you for your textbook! I'm really bad at DSP, so please excuse any mistakes I might make. I have a recording sampled at 10MSPS with two wideband signals (and...
Just as an idea - would it be possible to make a chapter on HRPT decoding? I have many IQ recordings and can supply one in case. Thank you so...
I would love to see a loopback example that includes: 1. Reading input data 2. Generate TX stream 3. Simulate Channel 4. Receive & process RX stream 5. Compute BER
On annoyance with the current code is that the generated results vary each run. This can be resolved by specifying the random number seed was specified each time random values...
In https://pysdr.org/content/sync.html#fine-frequency-synchronization, the Costas loop includes LPF's that remove the terms containing 2*\pi*f*t. There needs to be an explanation that the LPF low-pass filters are set so that the first...
I just realized that the symbols used in the circuit diagram may be unfamiliar to many readers, so the symbols should be defined, or a reference provided.