Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!mailrus!iuvax!purdue!haven!mimsy!fe2o3!michael From: michael@fe2o3.UUCP (Michael Katzmann) Newsgroups: sci.electronics Subject: Re: Hardware Correlators Message-ID: <266@fe2o3.UUCP> Date: 6 Dec 89 15:59:19 GMT References: <1048@baird.cs.strath.ac.uk> Reply-To: michael@fe2o3.UUCP (Michael Katzmann) Organization: Rusty's BSD machine at home Lines: 39 In article <1048@baird.cs.strath.ac.uk> dcthomso@cs.strath.ac.uk (Duncan C Thomson IE87) writes: >I am doing a final year project which will require correlation of an >(ultransonic) signal with a reference signal. I am currently trying to decide >whether to do this in software or in hardware. > >Does anyone know of any hardware correlators? > I know TRW make a few. >How fast are they? > Very (10's of Megs I think, though its a few years sice I looked at the docco) >How much do they cost? > If you have to ask, you probably can't afford them. The CSIRO in Australia (division of Radio physics) built a custom correlator for the AT (Australian Telescope), which is cascadeable and looked very nice. I don't know whether there was ever thought about licencing it's manufacture commercially. A DSP approach may be possible (if a bit slow), I think INMOS has an app note on one of their DSP chips for this sort of work. (See SGS-THOMPSON-RCA-INMOS..) --------------------------------------------------------------------- email to UUCP: uunet!mimsy!{arinc,fe203}!vk2bea!michael _ _ _ _ Amateur | VK2BEA (Australia) ' ) ) ) / // Radio | G4NYV (United Kingdom) / / / o _. /_ __. _ // Stations| NV3Z (United States) / ' (_<_(__/ /_(_/|_