Charles G4GUO is working on RECEIVING DVB-S2 protocol with the PLUTO-ADALM unit in Linux software. The most difficult portion of the effort is to implement a fast version of the LDPC decoder for Forward Error Correction functions. So far, Charles can currently decode 500 KSymb/sec using an expensive CUDA graphics card from NVIDIA to provide hardware acceleration of the LDPC algorithm. He still has a lot of work to now optimize the speed of LDPC by rewriting the algorithm to use the GPU’s memory in the most efficient way. Charles explained that he can foresee some cheaper GPU’s than the CUDA board doing a reasonable job with this FEC task. Note that this need for a GPU does not exist if receiving DVB-S protocol.
first PLUTO Rx Screen Capture of DVB-S2 at 500KSymb/s by G4GUO
Finally, Art WA8RMC reports that the first draft PCB layout files for the MiniTiouner-Express version of the MiniTiouneV2 board design have completed by Tom WB6P and have been reviewed with just a few simple changes. An PCB update will be started by WB6P when he returns from a short vacation. The intent is to produce a smaller and assembled and tested version of the Serit NIM PCBA design at an affordable price.
“Project speed set to slow” …. de Ken W6HHC
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