Forum: GNU Radio Re: TechnoConcepts TC-RX1000 press release

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Joel Kolstad (Guest)
on 2006-05-18 00:40
(Received via mailing list)
They also conveniently forget to deal with all the bane of all wideband
SDRs -- interfering signals in one band will, at best, decrease
sensitivity
in other bands.  80dB SNDR is nowhere near enough to simultaneously
receive, say, GPS data and process CDMA phone calls without something
like
a diplexer in the front end to split off the appropriate frequency
ranges.

Any bets on what the chip effectively *is*?  Just a bunch of relatively
high-speed 14 bit ADCs all phased appropriately?  Or something fancier?
Eric B. (Guest)
on 2006-05-19 05:02
(Received via mailing list)
On Wed, May 17, 2006 at 01:37:54PM -0700, Joel Kolstad wrote:
> They also conveniently forget to deal with all the bane of all wideband
> SDRs -- interfering signals in one band will, at best, decrease sensitivity
> in other bands.  80dB SNDR is nowhere near enough to simultaneously
> receive, say, GPS data and process CDMA phone calls without something like
> a diplexer in the front end to split off the appropriate frequency ranges.
>
> Any bets on what the chip effectively *is*?  Just a bunch of relatively
> high-speed 14 bit ADCs all phased appropriately?  Or something fancier?

There's a patent that provides some of the details.
Try searching the PTO database for assignee == TechnoConcepts.
It looks sort of like a delta-sigma converter with a mixer in front of
it.

Eric
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