After a brainstorming session at PARI, I've come up with an alternative to either USB or GigE, with up to three times the throughput of GigE.
Ultra320 SCSI. Pros: 1.) Standard software interface from the Linux side (libscg like used for CD burners); 2.) Scalable throughput with PCMCIA UltraWide SCSI available; any given SCSI device has to be able to scale from 5MB/s SCSI-1 up through the top end for the device; Ultra320 gives 320MB/s of throughput, potentially, which would increase our bandwidth ten times (three time faster than GigE) and would be a good fit for the chips involved. The SCSI layer could even be done on an FPGA, since it's standard LVDS levels for LVD-SCSI. 3.) Interface boards are available for any throughput range needed without changing any hardware at the USRP. Need 10MB/s? Get a $5 eBay special. Need the full rate? get a 64-bit PCI-X U320 screamer. 4.) External and internal interfaces available. 5.) Ability to process and redirect streams from one USRP to another one without CPU intervention over the SCSI bus. Comments? -- Lamar Owen Director of Information Technology Pisgah Astronomical Research Institute 1 PARI Drive Rosman, NC 28772 (828)862-5554 www.pari.edu _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
