Re: [Discuss-gnuradio] Re: in-band signaling project overview

2007-10-12 Thread Jeff Brower
Brian- > On 10/12/07, Jeff Brower <[EMAIL PROTECTED]> wrote: > > I think the biggest concerns with Cyclone I are lack of multipliers and low > > amount of > > internal mem (26 kbyte for the EPC1C12). > > Understandable, but also remember that a CORDIC can perform a > multiplication if you want i

Re: [Discuss-gnuradio] Re: in-band signaling project overview

2007-10-12 Thread Brian Padalino
On 10/12/07, Jeff Brower <[EMAIL PROTECTED]> wrote: > I think the biggest concerns with Cyclone I are lack of multipliers and low > amount of > internal mem (26 kbyte for the EPC1C12). Understandable, but also remember that a CORDIC can perform a multiplication if you want it pipelined - and if y

Re: [Discuss-gnuradio] Re: in-band signaling project overview

2007-10-12 Thread Jeff Brower
Brian- > > 2) Does your new FPGA code require the next-gen USRP, with Spartan 3 FPGA? > > My understanding is that capacity is very > > limited in the Cyclone, which is an old FPGA (around yr 2002 time-frame). > > If you have a single, specific application in mind, you should be able > to reduc

Re: [Discuss-gnuradio] Re: in-band signaling project overview

2007-10-12 Thread Jeff Brower
Brian- > > 2) Does your new FPGA code require the next-gen USRP, with Spartan 3 FPGA? > > My understanding is that capacity is very > > limited in the Cyclone, which is an old FPGA (around yr 2002 time-frame). > > If you have a single, specific application in mind, you should be able > to reduc

Re: [Discuss-gnuradio] Re: in-band signaling project overview

2007-10-12 Thread Brian Padalino
On 10/12/07, Jeff Brower <[EMAIL PROTECTED]> wrote: > ... > 2) Does your new FPGA code require the next-gen USRP, with Spartan 3 FPGA? > My understanding is that capacity is very > limited in the Cyclone, which is an old FPGA (around yr 2002 time-frame). If you have a single, specific applicatio

[Discuss-gnuradio] Re: in-band signaling project overview

2007-10-11 Thread Jeff Brower
George- Ok, I get it. Sounds very promising. A couple of quick questions: 1) What about commands (meta-data) to help deal with latency? For example, 'if you receive such-and-such request, send this ACK'? 2) Does your new FPGA code require the next-gen USRP, with Spartan 3 FPGA? My understa