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I can't answer your "bits-per-second in actual usage" question, because I've never worked at HF myself. My brief understanding is that BPS is a trade off for SNR. SNR (Signal-to-Noise Ratio) is …

Is it correct to say that with digital modes, that is impractical, and you should just listen (over the bandwidth you plan to use) and if you hear nothing, just go? Well, that really depends; "liste …

What SNR should I expect? Wrong question! You need to ask yourself: What's the SNR I need to still achieve my desired performance. "Desired performance" here is How much data do I need to tran …

… to modify a UMTS/GSM module or mobile phone so it operates in a frequency that can be used with a HAM license. That means you'll need external mixers – mobile chipsets are very well designed to …

I can't really help you with fixing the installation on Windows 10. As far as I know, Tytera's DFU mode is ahem nearly standards-compliant, and their drivers are unsigned. The latter might mean you ha …

Fully agreeing with Brian! Just to answer your formal question: From a strict definition (what is it?), is Morse code (CW) a binary mode? and, from your title, Is Morse code a digital, bin …

Complexity of your question It's hard to make general statements here, because computational complexity is a property of the implementation of a receiver, which usually is a choice given the propertie …

You're confusing the transceiver implementation with mode as is. Every single mode, as long as it's not used to transported to transport graphics, can be operated without a GUI. Whether or not an im …

Radio is analog, and modem converts analog signals to digital signals and vice versa. Everything is analog, yet you can do digital things with the physics that is given to us. As you've noticed, …

Is it possible to use an ordinary GMRS/FRS UHF handheld set for data communications? In principle: yes. You see, you're talking about voice communication devices. If now, on one end, someone spo …

Carson's rule doesn't apply to (low-order) FSK; it makes a statement about frequency-modulated continuous-spectrum signals, not about signals that jump (pulse-shaped) between a small set of frequencie …

You're asking exactly the right question – my receiver can't know this property of the transmission, how do I figure it out reliably – and that way of thinking makes for good receiver designs :) There …

Yes, that's mathematically and technologically possible. Because Mike already said the latter, let me elaborate on the math side: Remember that SSB is really just AM, with one half of the transmit sp …

It seems that FreeDV encodes the input audio signal in both the frequency and time domains, which means that the output signal amplitude doesn't follow the input signal amplitude, but rather the ou …

Table of contents But what exactly generally is a Gold code? How exactly are they implemented in order to differentiate multiple signals on the same frequency? What Gold Codes are and aren't How th …