3 ms·
Also thinking about channel sounding. MIMO usually has a method of measuring the channel response with known data (or a known property of the data, such as a m
by femto 4y ago
Also thinking about channel sounding. MIMO usually has a method of measuring the channel response with known data (or a known property of the data, such as a modulation type), then the channel is either assumed to be stationary whist the unknown data is sent, or a model is used to extrapolate the channel response.
I wonder if the star around which the exoplanet orbits can be used to sound the channel? The light from the star would contain information in the form of its spectra. Maybe this can be used to get the channel response? Perhaps the spectra can be treated as a form of modulation?
- pmayrgundter 4y agoInteresting. I'll have to check that out. Maybe related, depending on how close the light from the far target is to tangent near the lensing star, there is also an atmosphere around the star that is emissive. I was thinking that's mostly noise, but maybe it's accelerated enough to shift its spectrum and serve some purpose in measuring the lensing strength? But either way, would need to characterize it enough to remove it from signal.
- pmayrgundter 4y agoHeya, I'm really inspired by the idea. I propose we work it up into a paper, On the Existence (or not) of a Multiple Gravitational Lens Telescope. I've created a project under Celestiary since I think we can use the code there to do the search on the Celestia star database and also do simulations. https://github.com/celestiary/mglt https://github.com/celestiary/mglt I hope that's interesting and that we can work together! Cheers, Pablo