On Tue, Aug 21, 2007 at 09:58:00PM +0530, Prasanna Rao wrote: > Hello everyone, > > I am planning to implement a small software-defined radio with a bandwidth > of say 50-300 MHz at first. The system should be able to receive AM, FM, PM > signals over the mentioned RF spectrum with upto 10MHZ baseband information. > This would require an IF of at least around 11-12MHz. Can u ppl help me in > choosing an appropriate RF front-end design for the hardware system? > > I am facing a problem in selecting the right analog down-conversion system > design which would possess a good IMRR, sufficient linearity and an > acceptable SNR over the desired bandwidth. If I am to tune my radio through > the software, which I want to, I'll have to set dynamic filter > characteristics to the RF amplifier stage(before mixing) to facilitate image > rejection. Can a superheterodyne down-conversion serve my requirement?? If > not, what kind of receiver system should I use..? Is Direct-Conversion > technique implementable in my case? Please share your knowledge on these > matters. > > I basically want a 10MHz IF for being able to receive Cable TV signals as > well. Of course this will be quiet complicated but I will try to doing it. > With that I may try touching ISM bands later at some pt when I have the > required receive-boards.. > > Waiting for your response. > > __________ > Regards, > Prasanna
The quick path is to buy a USRP with a TV RX daughterboard. Then you can get to work on your software ;) USRPs are available here: http://ettus.com http://www.ettus.com/custom.html Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
