Hi Vincenzo, That's interesting. Can you point to some description or this "MAgic" technology? From your description I'm not sure I understand even on what level it works and what it actually does :)
On Fri, Jan 29, 2010 at 12:04, Vincenzo Pellegrini <wwvi...@gmail.com> wrote: > Hi GNURadio fellows, > considering that this list has grown to something highly relevant in > Software Defined Radio I thought it would have been a good idea to share > here a few thoughts I've been having since long and as well as a result that > was just achieved. > > > Since a few months after my first approach to SDR in 2006, > I thought I picked up two major facts about the technology: > .:. SDR infinite potential lying for sure in its flexibility but, even more > relevantly, in its ability to bypass > the costly HW-level design stage which is embedded in any traditional > radio design/production process > .:. Its equally infinite power-inefficiency compared to traditional, > HW-implemented competitor technologies. > In fact, ease of development as well as flexibility appear to be > inversely proportional to power efficiency. > The latter being in my opinion the reason for which SDR has been growing for > ages up to now but has never "exploded" as we could expect from a technology > cutting away a conspicuous part of the design costs of any radio system. > Actually, flexibility and cost-efficiency, though considerable, do not > appear to be sufficient motivation for accepting to upscale power > requirements (at a given computational cost yielded by the implemented > wireless standard) by a factor which typically is in [100 ; 300]. > Whether right or wrong, by working with these thoughts in mind, during the > research I'm carrying on at the University of Pisa, Italy while doing my PhD > here, I developed a novel implementation technique targeted at > software-implemented Signal Processing over General Purpose CPUs or DSPs > which we (at DSPCoLa lab, http://dspcola.iet.unipi.it ) call "MA". > Current research results have shown that MA was able to increase by slightly > more than one order of magnitude the power efficiency of a traditionally > implemented (MA-free) SDR. > > By applying such "MA" technology to the ETSI DVB-T receiver chain with the > help of: > Mario Di Dio (former master thesis student, now PhD Student at DSPCoLa) > Luca ROSE (former master thesis student at DSPCoLa, now PhD student at > Supélec Paris) > we obtained the receiving companion of Soft-DVB: SR-DVB. > Standing for Software Receiver - DVB, > SR-DVB is a fully software (all signal processing is done in pure C++ over > the host computer) ETSI DVB-T receiver capable of running realtime > while providing 11.612 Mbps throughput > and absorbing less than 50% of computational resources available over an > Intel Q9400, 2.66 GHz CPU. > As long as MA was applied only to the two computationally-heaviest blocks of > the receive chain (i.e. Viterbi Decoding and OFDM synch), we believe that > considerable margins for improvement of the presented result do exist. They > will be explored in the next months. > > SR-DVB will be presented in Karlsruhe at WSR 10 > as the article: > "A Fully Software ETSI DVB-T Receiver Based on the USRP" > during such presentation also MA technology will be briefly outlined. > A demo video of our proof-of-concept receiver is available at > www.legalepellegrini.it/ing/SR-DVB_demo_long.VRO > as usual, mplayer or VLC wil play this camcorder mpeg2 viedo easily. > > Best regards to all writers and readers of the list > vincenzo > > > > > -- > Vincenzo Pellegrini > http://www.youtube.com/user/wwvince1 > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- Regards, Alexander Chemeris. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
