Re: [julia-users] Radio.jl: a digital communications package
Thanks for the info. I've trying to come up with a type scheme. Say I create some modulated symbols, then interpolate them with a nyquist filter, then upsample and shift the signal with a mixer. It would be nice to know the relative sample rate and center frequency of the signal, plus mod type. But I can't quite see what makes sense until I actually start using the code, which is why I haven't been typing everything yet. It sound like you've given it a lot of thought. Are you planning on open sourcing your code, or is it too specific to what you're doing? If you are going to open source it I'd hate be writing duplicate code, especially if you have better ideas. I just want a decent comms framework so I can pitch Julia to my company as an alternative to Matlab. On Tuesday, April 8, 2014 7:32:29 AM UTC-6, Miguel Bazdresch wrote: Jay, I'm also writing a package to do digital communications simulation, to support my work both in research and in teaching. There's too little functionality at this point to make it worth sharing, but I thought I'd share a couple of ideas. I'm using julia's type system to define bits, symbols, and waveform types. They're all vectors of numbers, but the type works as a label or identifier. I think this makes it easier for students to build their simulations: they don't have to mentally keep track of the meaning of each vector. Also, it makes it easy to detect errors such as adding a bit vector to a signal vector. Using types like this makes it easy to carry simulation information around. For example, the waveform type has a field for the sampling interval, and my spectrum plotting function gets that information from the waveform itself. This also allows me to define blocks that take vectors of one type and output a different type. For example, a matched filter takes a waveform and outputs a symbol vector. With a large enough library of blocks, you can draw a diagram of your system and translate that into a simulation very easily. Any inconsistencies are detected by the type system itself. -- mb On Sun, Apr 6, 2014 at 4:02 PM, Jay Kickliter jay.ki...@gmail.comjavascript: wrote: I didn't tag the subject with [ANN] since *Radio.jl https://github.com/JayKickliter/Radio.jl* is barely a package yet. But I am looking for feedback, feature requests, and hopefully some help. I'm mainly writing the package to support my work with space communications, so I will be focusing on Phase Shift Keying and rectangular Quadrature Amplitude Modulation. But Julia needs a general comms package. If you have any needs/suggestions please let me know. I mistakenly re-implemeted some of *DSP.jl*'s functionality, and some of what I've written is missing from it. Maybe Radio's filtering functions should be moved to DSP?
[julia-users] Radio.jl: a digital communications package
I didn't tag the subject with [ANN] since *Radio.jl https://github.com/JayKickliter/Radio.jl* is barely a package yet. But I am looking for feedback, feature requests, and hopefully some help. I'm mainly writing the package to support my work with space communications, so I will be focusing on Phase Shift Keying and rectangular Quadrature Amplitude Modulation. But Julia needs a general comms package. If you have any needs/suggestions please let me know. I mistakenly re-implemeted some of *DSP.jl*'s functionality, and some of what I've written is missing from it. Maybe Radio's filtering functions should be moved to DSP?
Re: [julia-users] Radio.jl: a digital communications package
This is pretty great! I've been wanting to write an rtlsdr library for a while, (I've gotten blocking reading mode working) and it'd be great to be able to hook this up to it and actually receive some signals! On Sun, Apr 6, 2014 at 1:46 PM, João Felipe Santos joao@gmail.comwrote: Hello Jay, first of all, great job with the package! We should definitely integrate Radio.jl with DSP.jl, so that it uses DSP as a dependency instead of having duplicates of basic functions (FIR, windows, etc). I will be able to assist in migrating the extra functionality you implemented to DSP.jl in a few weeks, but feel free to send pull requests to if you are interested. -- João Felipe Santos On Sun, Apr 6, 2014 at 4:02 PM, Jay Kickliter jay.kickli...@gmail.comwrote: I didn't tag the subject with [ANN] since *Radio.jl https://github.com/JayKickliter/Radio.jl* is barely a package yet. But I am looking for feedback, feature requests, and hopefully some help. I'm mainly writing the package to support my work with space communications, so I will be focusing on Phase Shift Keying and rectangular Quadrature Amplitude Modulation. But Julia needs a general comms package. If you have any needs/suggestions please let me know. I mistakenly re-implemeted some of *DSP.jl*'s functionality, and some of what I've written is missing from it. Maybe Radio's filtering functions should be moved to DSP?
Re: [julia-users] Radio.jl: a digital communications package
I've been dreaming of writing a UHD package so that julia could talk to the USRP. That'd be awesome, and probably not too hard, but I haven't found the time. -- mb On Sun, Apr 6, 2014 at 5:19 PM, Elliot Saba staticfl...@gmail.com wrote: This is pretty great! I've been wanting to write an rtlsdr library for a while, (I've gotten blocking reading mode working) and it'd be great to be able to hook this up to it and actually receive some signals! On Sun, Apr 6, 2014 at 1:46 PM, João Felipe Santos joao@gmail.comwrote: Hello Jay, first of all, great job with the package! We should definitely integrate Radio.jl with DSP.jl, so that it uses DSP as a dependency instead of having duplicates of basic functions (FIR, windows, etc). I will be able to assist in migrating the extra functionality you implemented to DSP.jl in a few weeks, but feel free to send pull requests to if you are interested. -- João Felipe Santos On Sun, Apr 6, 2014 at 4:02 PM, Jay Kickliter jay.kickli...@gmail.comwrote: I didn't tag the subject with [ANN] since *Radio.jl https://github.com/JayKickliter/Radio.jl* is barely a package yet. But I am looking for feedback, feature requests, and hopefully some help. I'm mainly writing the package to support my work with space communications, so I will be focusing on Phase Shift Keying and rectangular Quadrature Amplitude Modulation. But Julia needs a general comms package. If you have any needs/suggestions please let me know. I mistakenly re-implemeted some of *DSP.jl*'s functionality, and some of what I've written is missing from it. Maybe Radio's filtering functions should be moved to DSP?
Re: [julia-users] Radio.jl: a digital communications package
Thanks. Most of the features listed in the README haven't been implemented yet. I'm struggling with resampling right now, and trying to figure out how to do multistage interpolation/decimation for large rate changes. And I'm definitely lost when it comes to polyphase filtering. That said, basic single interpolation is working; the hard part is figuring out how to test if it's working correctly. I could definitely use your help moving the filtering related stuff to DSP. Also, I'd love to hear your opinion on what should stay in Radio. Modulation should stay, but I'm not sure about stuff like noise generation functions. There's no hurry, I probably still won't have much to contribute for at least a month. On Sunday, April 6, 2014 2:46:36 PM UTC-6, João Felipe Santos wrote: Hello Jay, first of all, great job with the package! We should definitely integrate Radio.jl with DSP.jl, so that it uses DSP as a dependency instead of having duplicates of basic functions (FIR, windows, etc). I will be able to assist in migrating the extra functionality you implemented to DSP.jl in a few weeks, but feel free to send pull requests to if you are interested. -- João Felipe Santos On Sun, Apr 6, 2014 at 4:02 PM, Jay Kickliter jay.ki...@gmail.comjavascript: wrote: I didn't tag the subject with [ANN] since *Radio.jl https://github.com/JayKickliter/Radio.jl* is barely a package yet. But I am looking for feedback, feature requests, and hopefully some help. I'm mainly writing the package to support my work with space communications, so I will be focusing on Phase Shift Keying and rectangular Quadrature Amplitude Modulation. But Julia needs a general comms package. If you have any needs/suggestions please let me know. I mistakenly re-implemeted some of *DSP.jl*'s functionality, and some of what I've written is missing from it. Maybe Radio's filtering functions should be moved to DSP?
