On Sun, 3 Jan 2010, Karsten Nohl wrote: > In appears that the USRP-1 is limited in two dimensions, one of which > would be required for a full sniffer: > First, the USB link does not support for a whole band to be transfered > to the PC in raw form. Second, the FPGA seems too small to support > decoding of the channels before sending to the PC. I'd be happy to be > proven wrong on the latter one by some ingenious FPGA programmer.
One approach for a more low-cost solution than 2*usrp2, although more "hackish", might be: * 1 usrp1 (or similar) * 1 separate fpga card, like the xilinx Spartan-6 FPGA SP601 Evaluation Kit ($295) (or similar if not enough logic resources) * .. and some high-speed serial connection between them (i don't remember if the usrp has i/o inside which could be used for this). The fpga eval board has gigabit ethernet, various i/o as well as (perhaps?) plenty of space for user logic. Also xilinx to some degree supports linux, which makes for a more convenient development environment than the usrp's altera. A high speed serial link between the usrp and the fpga eval board could then shove relatively raw, high-speed data to the fpga board for processing and implement the usrp2 gig-e protocol. yours, oystein _______________________________________________ A51 mailing list [email protected] http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
