Re: Making a VLF SSB receiver

2024-07-22 Thread Marcus Müller
Hi Julian, the audio source is set to a sample rate of 48 kHz. So, you're either already bandpass-subsampling and forgot to mention, or you can't represent frequencies higher than 24 kHz with your digitizer in this setting. Can't tell you which – your physical setup isn't part of your flowgrap

Making a VLF SSB receiver

2024-07-19 Thread Steve Hageman
Hello Julian - It is unclear as to what is not working for you, so it is kind of hard to suggest improvements. In situations like these it is important to have a test signal to 'play around with' so you can study and understand the issues more fully. I would either, 1) Record one or more sam

Making a VLF SSB receiver

2024-07-19 Thread Julian Aranguren
Hi everyone ! Long story short, in the context of a broader project I am attempting to recreate on GNUradio an SSB receiver for VLF, meant to function with an ultrasonic hydrophone. The goal here is to demodulate everything between 20 and 40khz (or higher, with a similar bandwidth) down to between