On Sun, Nov 1, 2009 at 1:56 PM, Tim Newman <[email protected]> wrote: > Luke Kenneth Casson Leighton wrote: >> >> http://shop.ztex.de/product_info.php?cPath=21&products_id=28 >> >> dear gnuradio developers, >> >> i was searching on opencores.org to see if there was a SoC that >> incorporates an FPGA(-like) device with an open core, and i >> accidentally encountered the above USB-FPGA board. it has a Cypress >> CY7C68013A/14A 480mb/s USB-2 Microcontroller and a Xilinx Spartan-3 >> XC3S400 FPGA. it is also accompanied by a developer board: >> >> http://www.ztex.de/usb-fpga-1/exp-1.1.e.html >> >> the price for the USB-FPGA is an incredibly-low $EUR 70, and the >> developer board is only $20. >> >> so my primary question is: is this USB-FPGA board (apart from the >> issue of connecting to A-D / D-A boards) suitable for use to do an >> 802.11b transceiver? is it fast enough? >> >> many thanks, >> >> l. >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > This is a fairly loaded question, as it completely depends on WHERE you > implement certain portions of the 802.11b waveform. The primary bottleneck > is the USB bus, and you can't get 20 MHz of bandwidth over that bus.
ah - eek! i wasn't anticipating it to be that much. i was expecting a much-reduced amount of data. > BBN > and whoever else worked on the current GNU radio 802.11b waveform solved > this by moving the despreading to the FPGA. This is just one example. ohh, ok - so it's doable - just.... rather technical :) thanks for responding, tim. l. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
