You missed my point, where did you get your definition of a SDR radio, it seems awfully restrictive.
A PC, A DSP, and a FPGA are all controlled by "Software" that defines what they do, so they are all "Software Defined Radios" On Sat, 2006-06-10 at 14:31 +0200, Andreas Troschka wrote: > You can find on the Internet and in some technically tailored bookstores a > lot of documentation as studies, e-books and books discussing what a SDR is. > Some universities have R&D projects on progress on this item and many papers > can be obtained from them visiting their institutional web servers. > Telecom companies are continuously researching on SDR and sometimes technical > documentation can be found through specific channels (e.g. contacting the > insiders). > This companies develope the most advanced *applied* SDR architectures (maybe > military and space projects are better but they use proprietary HW we are not > able to reach). > > >From the conceptual point of view, DSPs as other microprocessors are > >actually the only way to have software substituting the radio's hardware. > > FPGAs are reconfigurable hardware that substitutes many ICs in one package. > Sometimes it is possible to configure a FPGA to substitute algorithms usually > processed by software programs with hardcoded logic. > Due to the fact that the aim of SDR is to put the more hardware of a radio > into software processing, actually the only components enabling to do this in > a considerable amount are microprocessors. > > I'm saying "actually" because new revolutionary technologies are on the way. > > One of these is the introduction of RCPs, Reconfigurable Communication > Processors, which are based on the merge of one or more DSP cores and a new > type of on the fly reconfigurable device, far parent of the concept of the > ancient FPGA technology. > This processors are able to change their configuration during elaboration in > a couple of machine cycles without loose of data, that means software can > change the characteristics and architecture of the SDR near to instantly. > Such a device can introduce software computing from as near as the antenna > connector (even if I'll always sustain that a sort of preselector is > inevitable!) down to the speaker and from mike up to the RF PA in the > opposite direction. > The same device may serve as SD RX and as SD TX. > > So getting a look on what happens outside the HAM world will reveal some > interesting new experiment opportunities. > > Andreas - ik2wqi > > > KD5NWA wrote: > > Where did you get what the definition of a SDR is? What is the > > difference between the software in a PC a DSP or a FPGA, don't they all > > use a defined program to make a machine behave in a described way? > > > > > > > Yahoo! Groups Links > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> You can search right from your browser? It's easy and it's free. See how. http://us.click.yahoo.com/_7bhrC/NGxNAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
