Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [doppler]

For questions pertaining to the Doppler effect and how it affects radio signals

This tag is used in relation to how relative motion can affect the perceived frequency at the receiver. This can affect communications with satellites as they pass over, for instance.

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Calculating Doppler Shift for satellites

If I know how fast a satellite is moving through space, how can I calculate the doppler shift for the pass?
Skyler 440
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Doppler Shift Compensation in Inter Satellite Communication

I am currently doing a project in the area of optical inter-satellite communication (GEO-LEO). I am using a optical carrier of 281 THz, and the Doppler shift corresponding to it is ±7 GHz. I introduced this Doppler shift in the transmitted signal…
Seetharama
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doppler LEO satellite

I am trying to model Doppler shift of LEO satellite, From my research so far I have come across the following formula: \begin{equation} \frac{f_r}{f_s}=\frac{1-\frac{u}{c}cos\theta}{\sqrt{1-\frac{u^2}{c^2}}} \end{equation} that in my understanding…
Rizias
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Where to find HF channel models or statistics?

When designing a waveform for packet radio usage, it'd be helpful to know a few things, mainly distribution of coherency bandwidths distribution of coherency times Whilst such statistics are reasonably possible to generate for higher frequencies…
Marcus Müller
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Doppler shift compensation without using predictive modelling

Doppler shift mitigation has been studied extensively in the literature. In my implementations of satellite receivers (using GNU Radio), I use predicted Doppler shift from a software (GPredict) to compensate for Doppler shift. After that, I use a…
Moses Browne Mwakyanjala
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