Non-threatening signal suppression algorithms

[billgerr]

I believe non-threatening signal processing is important. This processing is user selected as some form of "Auto" on recent vintage detectors.

It would be good to assemble as much as we know about the algorithms used for non-threat signal alarm suppression as we could then judge their value. To start:



Escort---AutoSensitivity---4 adjacent channels of 32 channel spectral analyser must show X-band signal above threshold. 3 of 4 are ignored. 4 channels that are not adjacent are also ignored.

BEL--Autoscan---perhaps same as Escort but also includes K-Band. Rumored to also adjust threshold based on high spatial frequency of hits indicative of multiple low-level sources.

IIRC, CMI/Escort first used analog signal analysis (RASHID detection) and then autocorrelation to suppress falses from a collision avoidance system and cheap RDs, respectively. The latter has been described on numerous occassions by jimbonzzz and others and is present independent of setting on Belscorts and acts in a dual-mode for V1, i.e. either completely suppressing an alarm or J'ing out the alarm if a RD fundamental is found after the Ka signal is reported that is subsequently dismissed as its third harmonic.


Any other info?
Bill

[nvr2fast]

Mmm... I presume the detectors only do this on Autoscan mode, not Highway mode?

[billgerr]

Mmm... I presume the detectors only do this on Autoscan mode, not Highway mode?

Correct. I have clarified above post.

Thank you,
Bill