Re: [Discuss-gnuradio] OLPC

As in the DRM (digital radio mondiale) specification the signal are generally maximum 20kHz wide but 10kHz is the most commonly used nowadays. So the actual cheap way to receive DRM (Digital Radio Mondiale) transmission is to use the soundcard at A/D with an external tuner. With this it is also

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

On Dec 25, 2007 6:05 PM, David Hartzell <[EMAIL PROTECTED]> wrote: > DRM is pretty cool and has the /potential/ to provide the kids with a > multimedia experience, even if it takes two laptops "chained" together > to decode the signals... If the linking were in fact required, it would at least int

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

John Gilmore wrote: What kind of antenna would this require? Something external to the laptop? Or something that could be built into the plastic case? Gotta go with an external antenna, hopefully something like an RCA plug. If we're trying to encourage kids in developing nations to get into te

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

Frank Brickle wrote: > On Dec 24, 2007 5:11 PM, John Gilmore <[EMAIL PROTECTED] > > wrote: > > The Odyssey board operates at 10MHz IF; so wouldn't it need an external > tuner? > > > Yes, but many different tuners (band sets) can be serviced by the same > IF proc

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

On Dec 24, 2007 5:11 PM, John Gilmore <[EMAIL PROTECTED]> wrote: The Odyssey board operates at 10MHz IF; so wouldn't it need an external > tuner? Yes, but many different tuners (band sets) can be serviced by the same IF processor. > What kind of antenna would this require? Something external

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

On Mon, Dec 24, 2007 at 02:11:34PM -0800, John Gilmore wrote: > I'm glad you-all are pointing out low volume prototypes. I hope we'll > get someone interested who has designed high volume digital radio > electronics. High volume ~= million-unit. (Do any people like this > exist? Perhaps Matt's

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

As preface, I'm not a radio engineer. I'm a software guy with pretentions to understanding digital hardware. I have a few signal processing books on a dusty shelf. You lose me as soon as you start talking "Q signals". The Odyssey board operates at 10MHz IF; so wouldn't it need an external tuner

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

John Gilmore wrote: >> The thing does appear to have sufficient horsepower to do some DSP. >> I would like to think we can make several things available to this >> project. For example, I think a tunable HF receiver for shortwave AM >> broadcast is easiy achievable for very modest cost. Further ou

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

John Gilmore wrote: > > My first thought is to just increase the sample rate and effective > bits per sample of the audio processing hardware, and increase the > number of channels so that ordinary stereo audio can happen > simultaneously with analog I/O. I think it's a crime that cheap > analog I

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

John -- Have you looked at all at the Siren board? It's part of the HPSDR and Suitsat II projects: a low-power, low-cost SDR engine using the dsPIC33F embedded controller from Microchip. The current design uses 10 MHz RF in and out, and the QSD and QSE for complex sampling and excitation. There i

Re: [Discuss-gnuradio] OLPC - next generation with SDR?

> The thing does appear to have sufficient horsepower to do some DSP. > I would like to think we can make several things available to this > project. For example, I think a tunable HF receiver for shortwave AM > broadcast is easiy achievable for very modest cost. Further out, I > would to see the

Re: [Discuss-gnuradio] OLPC

Robert McGwier wrote: This is sent with my OLPC. What a great idea this project is. It goes to show what can be acccomplished ny dedicated individuals, something familiar to a lot of people in these two groups. The thing does appear to have sufficient horsepower to do some DSP. I would like

[Discuss-gnuradio] OLPC

This is sent with my OLPC. What a great idea this project is. It goes to show what can be acccomplished ny dedicated individuals, something familiar to a lot of people in these two groups. The thing does appear to have sufficient horsepower to do some DSP. I would like to think we can make seve