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2021-12-02Begin frequency correction (incomplete)Nao Pross3-51/+92
2021-12-02Delete ZMQ testsNao Pross4-201/+0
2021-12-02Implement phase correction in test file with embedded python blockNao Pross3-539/+234
2021-11-28Working access code correlationNao Pross2-87/+991
2021-11-28Delete acgen stuff, it was all wrongNao Pross4-411/+0
2021-11-27Start access code cross correlationNao Pross6-150/+1007
2021-11-27Update access code processingNao Pross6-47/+77
Fixed: FIR filter samples need to be complex conj
2021-11-25Create test files for correlatorNao Pross6-0/+1159
2021-11-24DiscussionNao Pross4-179/+249
2021-11-22Implement frame synchronizationNao Pross2-67/+42
There is an issue somewhere between the mod and demod, since frame synchronization works on a direct path.
2021-11-20Implement Frame ObjectNao Pross3-106/+283
2021-11-18Partially implement xor correlator (untested)Nao Pross2-8/+6
2021-11-18Begin frame sync blockNao Pross2-4/+25
2021-11-17Begin working on frame syncronizationNao Pross1-3/+3
2021-11-17Replace GNURadio scripts with network codeNao Pross1-2/+2
2021-11-15Test UDP connection on sink blockNao Pross2-2/+6
Can be tested locally with: netcat -l4kuv localhost 31415
2021-11-15Create UI Plot sink blockNao Pross1-3/+17
2021-11-15Partially fix framerNao Pross2-305/+76
2021-11-12Create (a new) OOTNao Pross3-0/+964
2021-11-11Create ZMQ testNao Pross4-0/+201
2021-11-11Rename sketch.py to gui.py, move tests in test/ directoryNao Pross11-0/+417
2021-10-27Hardware AM korrigiert, QPSK angefangensara8-474/+374
2021-10-26Weitere Hardware AM Versuche, leider ohne Erfolgsara5-6/+3566
2021-10-25Hardware AM Simulation kleine Anpassungen vorgenomensara8-57/+2353
2021-10-25Erste laufende Hardware Simulation AMsara8-629/+2381
2021-10-19Theory mit PSK und QPSK angefangen.sara1-1/+1
2021-10-18Erster Hardware versuch mit einfachem Sinus Signal (noch nicht fertig)sara6-0/+2296
2021-10-14Remove unnecessary subfolder tests/Simulation and move QPSK into new ↵Nao Pross10-1522/+0
'simulation' dir
2021-10-14Delete old test fileNao Pross2-695/+0
2021-10-14Add Equalizer and Phase + Freq. correction to QPKS simulationNao Pross2-232/+606
Continuing the work of commit 20e54b3cf198f17e05a3c7e8716138717447aa32 Important: - The diagram has been updated to include a CMA equalizer and a costas loop (for phase correction and small frequency correction). TODO: - Decode the signal - Create USRP hardware sinks (RX side, for later) It would be very nice if we manage to find a 'switch' block that allows to have in a single flow diagram both the simulated and "real" signals. NOTE: recall that the USRP gives directly a baseband signal, which means that everything between the channel the costas loop (both included) will not be used when the hardware is connected. Only the (not yet) implemented decoder (and eventually some more filters if needed) will be used. Other notes: - The layout has been updated to use QT Tab widgets (defined on the top left corner). GUI elements can be put into tabs by giving a string '<tab name>@<tab nr>: <grid options>' as GUI hint. - To make the diagram nicer, all GUI sinks (eg. constellations plots of time / freq. plots) are vertically aligned. Constellation above, and time and freq. sinks below. Variables ought to be placed near their respective block, unless they are global, in which case they should go on the top left.
2021-10-13Create QPKS simulationNao Pross2-0/+1148
The current flow diagram does the following: - Generate a QPKS constellation from a random bit source. The constellation is parametrized by the 'Constellation Rect. Object' and the variables 'sps' (Samples Per Symbol) and 'excess_bw' (Excess Bandwidth). - Send the modulated signal through a AWGN channel. Noise channel taps are controlled with the 'taps' variable, the other paramters are given through the 'QT GUI Range' objects. - Display the constellation diagram as well as the time and frequency domain plots of the signal after the channel (receiver side). - Synchronize the clock using a polyphase clock sync with root raised cosine filters. The number of filters is stored in 'nfilts' and the filter themselves are in 'rcc_taps'. - Finally, display the constellation after the RCC filters. What is still missing: - Multipath fading taps in the channel model (for later) - Equalization on the receiver side. PROBLEM: The wiki tutorial targets GNU Radio 3.9, and uses 'Linear Equlizer' and 'Adaptive Algorithm' blocks which are not available in GNU Radio 3.8. We need to use 'CMA Equalizer' and 'LMS DD Equalizer' and figure out their parameters instead. Though this should not be hard. - Phase and Fine Frequency Correction. - Decode the message.
2021-10-12Simulations Versuch von AM und SSBsara7-1/+2621
2021-10-07Rename "Simulation" to AMsara2-0/+0
2021-10-04Create first AM simulationNao Pross2-0/+635
It implements the easiest, crappiest AM moulator.
2021-09-29Add test gnuradio fileNao Pross2-0/+695
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