Hello there,
New features coming: 1. Now MATLAB isn't needed. All in C/C++. All you need are rtl-sdr dongle and Linux computer. TDD and FDD are both supported. External LNB/Mixer (allow mixer and A/D use non-coherent clock sources) is also supported. 2. OpenCL parallel computation is supported! It searches per frequency point in 0.5s (desktop i7-3930K 6 [email protected]) 22x faster! or 2~3s (ThinkPad T410 i5 CPU [email protected]). Intel, AMD and Nvidia OpenCL SDK are tested. Acceleration ratio is gotten by Intel SDK. Nvidia GPU hasn't reached so amazing acceleration ratio. It maybe because of slow PCI-E and memory. I haven't found time to optimize on that. Another open source OpenCL lib pocl - Portable Computing Language ( https://github.com/pocl/pocl) is also tested, and it seems as fast as Intel's! (See video I attached in the end.) 3. Some improvements on algorithm. Higher sensitivity and more robust. video: http://www.youtube.com/watch?v=SxZzEVEKuRs (in china) http://pan.baidu.com/s/1o6qbLGY Have fun with LTE. Have fun with OpenCL! BR Jiao Xianjun (Ryan) On Wed, Feb 19, 2014 at 11:21 PM, Jiao Xianjun <[email protected]> wrote: > Hi there, > > As LTE-Cell-Scanner doesn't support TDD mode: > https://github.com/Evrytania/LTE-Cell-Scanner > > I fork LTE-Cell-Scanner and add TDD support to it: > https://github.com/JiaoXianjun/LTE-Cell-Scanner > (Not reviewed by James Peroulas, so it is just experimental currently.) > > It works fine with rtl-sdr E4k tuner dongle below 2.2GHz, but doesn't work > in 2.5~2.7GHz even with external MMDS-LNB. > > Because the algorithm assumes analytic relationship between carrier and > sampling frequency error. > > I write some matlab scripts (https://github.com/JiaoXianjun/rtl-sdr-LTE ) > to separate carrier and sampling processing in algorithm. Aided by > MMDS-LNB, the scripts can detect TDD&FDD LTE cell in 2.5~2.7GHz now! > > 12 LTE Cells information are decoded. 2 are FDD LTE, the rest are TD-LTE. > Because here is China! (Partly because that TD-LTE is announed earier than > FDD by government) > > Hope that in the future these features can be merged to original > LTE-Cell-Scanner. > > Scanning results and video are attached. > http://www.youtube.com/watch?v=4zRLgxzn4Pc >
