[Paul Maine] was experimenting with GNU Radio and an RTL-SDR dongle. He created an SSB receiver and, fortunate for us, he documented all of it in a video you’ll be able to see beneath. He walks via learn how to generate SSB, too. If movies aren’t your factor, you’ll be able to return to the weblog submit from [Gary Schafer] that impressed him to make the video, which can also be a wealth of data.
There’s a little math — you virtually can’t keep away from it when speaking about this subject. However [Paul] does a great job of explaining all of it as painlessly as attainable. The intuitive half is easy: An AM sign has most of its energy within the provider and half of what’s left in a redundant sideband. So in the event you can strip all these components out and amplify only one sideband, you get higher efficiency.
We like to play with GNU Radio. Certain, the GNU Radio Companion is only a fancy shell over some Python code, however we like the way it maps software program to blocks such as you would possibly use to design a standard receiver.
If you wish to strive any of this out and don’t have a adequate HF antenna and even an HF-capable SDR, no worries. [Paul] thoughtfully recorded some IQ samples off the air right into a file. You may play again via your design to check the way it works.
When you’ve got by no means used GNU Radio, beginning with audio isn’t a foul option to get your toes moist. That’s how we began our tutorial a decade in the past. Nonetheless price working via it if you’re attempting to get began.
