sidelobe

Posted Feb 15, 2006 at 12:57 PM | Permalink | Reply ian, you just described a generalized sidelobe canceller…

Martin Ringo on Principal Components « Climate Audit 2006

Assuming your primary signal (main-lobe from a directional antenna) is pointing at your desired signal, and each canceller element is omni-directional, the GSC actually steers nulls (spatially) towards sidelobe interferers.

Martin Ringo on Principal Components « Climate Audit 2006

The generalized sidelobe canceller is nothing more than the top-level description of a beamformer.

Martin Ringo on Principal Components « Climate Audit 2006

The correlated signals across the array, after blocking the desired signal, represents the sidelobe interference from just about anything, but usually a jammer of some sort.

Martin Ringo on Principal Components « Climate Audit 2006

However these other frequencies do not cause a trivially understood response in the DFT, they cause a response associated with a sinc curve (i.e, sin x/x), and also cause sidelobe responses in other frequency bins along the sinc relationship (this relationship can be modified using weighting factors, but they are not appropriate in this type of analysis).

Ammann at AGU: the Answer « Climate Audit 2006

FWIW, a generalized sidelobe canceller is sort of the mother of all adaptive filtering schemes assuming multiple inputs.

Martin Ringo on Principal Components « Climate Audit 2006

A narrower field of view with less sidelobe "leakage" is both an asset and a drawback, depending on the situation.

Defense Industry Daily 2009

We've already discussed the sidelobe propagation foul-up in the original PESA design, the THALES who failed to do the actaul physics calculations right, were never able to fix.

StrategyPage.com 2009

We've already discussed the sidelobe propagation foul-up in the original PESA design, the THALES who failed to do the actaul physics calculations right, were never able to fix.

StrategyPage.com 2009

sidelobe: Sorry to say, but according to traditional chinese astrology, Horse & Rat are very bad combinations, a lot of sparks perhaps but ultimately not meant to last.

PodCastle » PC003: Run of the Fiery Horse 2008