LA3ZA Radio and Electronics
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Unofficial Guide to Elecraft K2 Mod's
HF Propagation
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Showing posts with label
signal processing
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Showing posts with label
signal processing
.
Show all posts
28 April, 2025
The magic of adaptive filters in amateur radio
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Examples of a speech signal (top), a sinusoidal, and noise (bottom) Radio amateurs have been using adaptive noise reduction and adaptive not...
05 March, 2025
Why is speech quality so poor in DMR, D-STAR, and System Fusion?
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Example of a speech signal which transitions from an unvoiced to a voiced sound Digital VHF and UHF communications is increasingly popular a...
2 comments:
12 October, 2024
The Little Known Fourth Method of Generation of Single-Sideband Signals
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Envelope Elimination and Restoration, from Kahn 1952 There is a method for SSB generation which is now becoming popular with digital signal...
10 January, 2023
Audio delay - the unspecified parameter for ham radio transceivers
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Elecraft K3: Upper trace is start of sidetone and lower trace is start of RF ~15 ms later. An amateur radio transceiver is not a precision m...
20 August, 2014
Digital Signal Processing
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The Norwegian-language " The road to the international radio amateur license " came off the press this June. It is based on the ...
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