Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [modes]

Questions related directly to the mode of communication (SSB, CW, digital, etc).

Questions related directly to the mode of communication: , , , , , etc.

87 questions
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Does AM demodulation make use of the redundant information in both sidebands to eliminate noise?

XLR microphone cables, for example, make use of the dual channels out of phase to cancel noise by injecting the inverted and non-inverted signal into one end of the cable. Then any noise injected along the way will presumably be equal, and…
Bill - K5WL
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4
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Why are carrier waves necessary?

I am studying for the technician exam and I have come across the section on carrier waves, basebands, and various kinds of modulation. It makes sense to me that you create a signal by combining the baseband, which carries data, with the carrier…
user11031
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1 answer

Comparision between BFSK and BPSK

Why is BPSK preferable over BFSK? On what parameters this comparison is based? What are the advantages of BPSK?
shweta
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FSK or M-PSK for weak signal communications?

Popular amateur radio "below-the-noise-floor" communication modes (such as JT65, et.al.) seem to mostly use FSK, whereas NASA's deep space network appears to use M-PSK for (extremely) weak signal telemetry. Why would one choose one modulation…
hotpaw2
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2
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Multiple transmitters using same frequency

in our wireless network we have a variable count of devices. Each device contains one transmitter and receiver. Both receiver and transmitter are working on the same frequency, 433 MHz. To keep the price as low as possible, we are not able to buy…
Lorin
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WFM SDR and Audio resolution

How does SDR resolution translate to audio resolution when using an FM demodulation algorithm? For example: using a 8-bit/2.048 Mhz IQ stream, what is the maximum audio sample rate and bit depth that can be generated from a +/-75kHz mono WFM signal…
NewEndian
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