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reinerh

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Everything posted by reinerh

  1. Hello, in case the transmitter was modified the results become invalid and need to be re-computed. Please press the RunPRO button for re-computation and in case of a network planning project then also the RunNET button for computation of the network planning results.
  2. Hi, this error means that the network planning simulation cannot be started because of the missing path loss results. Please have a look in the ProMan progress window (Antenna tab) to get more details why the path loss results cannot be computed with RunPro. Just scroll up in this progress window until you will the corresponding error message given in red. Best regards
  3. When having started ProMan (which is the main tool of WinProp) the ProMan manual can be launched via F1 or by using ? => User Manual from the menue.
  4. No the coupling between the antennas is not considered, i.e. the MIMO performance is analyzed evaluating the correlation of the antennas due to the radio channel (multipath situation).
  5. Please wait for the next WinProp update 2018.2 which should solve the reported problems when using OptMan.
  6. Please find attached a simple sample project showing the prediction on prediction planes: When loading an .idb file with prediction planes there is an additional option on the Simulation tab which can be activated (please note that the DPM is not available for the prediction on planes): PredPlanes_2018-09-28_10-29.zip
  7. First you need to convert every .hgt file into the .tdb format. Then there is the following way to combine multiple topo files in ProMan which can then be used for simulations: Load the first *.tdb file in ProMan and combine the second *.tdb file via Edit => Combine Data => Max Value Fill the undefined pixels using Edit => Modify Data in Area => Interpolate Data Save the resulting topo data into a new *.tdb file via Data => Topo Database => Save As For rural scenarios the predictions can be also done for individual Rx points (under the simulation tab you can enter the points). If the maps are in metrical UTM coordinates you need to convert first long/lat to UTM (in ProMan under Data => Convert Coordinate Datum).
  8. The superposition of the individual coverage results can be done automatically in a network planning project by RunNet. For this purpose you would need to define a network planning project in ProMan based on the corresponding air interface (wireless standard definition file *.wst). Without network planning project (i.e. in a propagation project) the coverage of individual Tx antennas/leaky feeder cables can be superposed in ProMan by using the following steps: First load one of the results (preferably *.fpp file) in ProMan via File => Open Result and then superpose the next result via Edit => Combine Data => Max Value (can be done for further results in the same way).
  9. The observered problems with the 3D view indicate that the DirectX DLLs are not correctly installed. Typically this should work using the updater, but as you still have problems I would recommend to download and install the required DirectX package from the following link: https://www.microsoft.com/en-us/download/details.aspx?id=8109 For the commercial version please use the contact sheet under the Altair webpage: https://altairhyperworks.com/ContactUsFormHW.aspx Otherwise please let us know your e-mail address and we will connect you directly with the Altair team in China.
  10. Such vector layers can be displayed in ProMan via Display => Additional Data : Layer Management. Here you can import from various formats or load such data in the WinProp .add format (.add file is automatically created when converting urban building vectors from open street map files).
  11. The DPM computes both the LOS and NLOS regions. But you can activate under the Propagation tab of the ProMan project parameters also the output of the LOS map, which is then computed during the propagation simulation and can then be displayed in ProMan from the result free like the other results (Rx power, pathloss, ...).
  12. When defining a network planning project in ProMan with the attached wst files for 802.11n 20 MHz bandwidth there is a datarate of 58.5 MBit/s for the 64QAM High transmission mode. This is for a single MIMO stream according to IEEE specs (see the figure below). This means when using four MIMO streams in parallel the max. datarate is 260 MBit/s. IEEE 802.11n.wst IEEE 802.11n 5GHz.wst
  13. The optimization of the radio network i.e. selection of the required subset from the set of predefined transmitters to fulfill some coverage targets (e.g. Rx power level) is possible in the OptMan tool. Please see the attached application note. For the implementtation of your own optimization algorithm you would need to call the WinProp API (which is included in the 2018 installer together with the WinProp API manual and some sample projects under MS Visual Studio) for running the coverage prediction for each transmitter. Then you can process the computed results (given in the API data structures) based on your own optimization algorithm. OptManIndoorSubset.pdf
  14. WinProp considers for the area wide radio network planning every pixel in the simulation area as potential user location. Finally all the users in a cell need to share the available resources and impact also the interference on the neighboring cells. For this purpose the cell load for each cell can be defined individually (which is correlated to the number of users in the cell). The cell load can be also derived in the ProMan GUI version based on the generation of individual users over the area (with traffic density and assigned service) using a Monte Carlo simulator. However this functionality is only available in the GUI version and not yet in the WinProp API.
  15. So far WinProp can do only linear polarizations. Therefore you better process the theta and phi components in WinProp and combine the results afterwards outside WinProp.Alternative is to process the WinProp .str file include the ray path data (also the transmission matrix) e.g. using a script outside of WinProp. The syntax of the .str file is described in the ProMan user manual if you serach for str and includes also the transmission matrix T_vv, T_vh, T_hv, and T_hh.
  16. CST can export the antenna pattern in the WinProp ASCII .apa format.
  17. By default WinProp ProMan computes the results area-wide, thus analyzing what would happen if the mobile station is located at any position of the simulation area.
  18. You can define two Tx antennas in ProMan and assign then the same frequency carrier and signal group ID. In this case the two Tx antennas will transmit the same signal and their power contributions will be added at the receiver without interference. For the repeater you can derive the Tx power from the Rx power map of the feeding Tx antenna at the corresponding location. But there is no automatic feature in ProMan to connect one Tx antenna to another Tx antenna using a wireless backhaul link.
  19. Yes, this is possible in WinProp using the ProMan tool. ProMan allows to define multiple Tx antennas in a network planning project based on the selection of an wireless air interface definition (wst file) at the project definition. After the wave propagation simulation for the individual Tx antennas using RunPro, in the network planning simulation using RunNet the best server assignment is done, so you will clearly see which area is covered by which transmitter. Typically the results are computed area wide, representing the "what if" situation if there would be a user placed at any location in the defined simulation area. Please see the ProMan user manual under ProMan => Working with Projects (network planning) for further details.
  20. In the ProMan 2018.0.1 update the observed problem has been solved, now in ProMan the time-variant result for t=0s and the stationary result are identical.
  21. Hi Balaji, there is also a point mode in the ProMan GUI version which can be used to check the computation time for computing a few points. However for some of the WinProp propagation models the computation is done always for the full area, which is due to the specific implementation in order to achieve short computation times for generating the heat maps. So the IRT ray tracing model (based on preprocessing) and the DPM dominant path model are always computing area-wide. The SRT standard ray tracing model computes each point individually, so here the computation time is affected by the number of points which are computed (linear increase with the number). So you can derive the computation time for a single point also by the computation time for the area divided by the number of computed points (can be checked under the info button). The computation time depends also on the number of objects (e.g. building walls) included in the scenario and how many reflections and diffractions shall be computed (especially the diffractions are time-consuming as leading to ray multiplication). But for 1-2 reflections and a limited number of objects the computation time might approach real-time. Best regards Reiner
  22. Hi Balaji, yes, you just need to save the intermediate results (e.g. superposing 4 Tx antennas) as a separate *.fpp file. Then you can subtract the two files (e.g. including 4 Tx antennas each) in the usual way by loading the first *.fpp file and subtracting the second *.fpp file via Edit => Subtract File (Value, File, linear). Best regards
  23. Hi Balaji, the superposition of the individual coverage results can be done in a network planning project by RunNet based on the corresponding air interface (wireless standard definition file *.wst). For this purpose you need to define a network planning project in ProMan, select the air interface definition file (wst file which we provide for the most air interfaces). Then the simulation has two steps: RunPRO is computing the individual coverage for each defined Tx antenna, based on the assigned frequency carrier RunNET superposes the individual results to compute the overall received power, SNIR situation etc. The results of interest can be activated under the Network tab of the ProMan project parameters. Best regards
  24. Typically in a time-variant scenario there are some moving objects, otherwise you can use a stationary scenario. In case of moving objects the results will change depending on the position of the moving objects (for each of the simulated time steps). In WallMan you save a definable shapshot of a time-variant database as stationary *.idb file: Then you can use this stationary database for comparison. Or you just define the start and end time of the simulation parameters to 0s in your ProMan project under the Simulation tab. In this case only the result at t = 0s will be computed. Generally you can compare the results (e.g. Rx power given in *.fpp files) in ProMan via loading one result (either via the result tree in the loaded project or via "File => Open Result" and then subtract the other result via Edit => Subtract Data => Value (File, linear). In case of subtracting a stationary result from a time-variant result you will get the following dialogue, but after confirming with Yes the difference will be displayed: Which propagation model do you use (DPM, SRT, IRT)? Based on this we can investigate further.
  25. Hi, in WinProp you can simulate the channel characteristics including an arbitrary antenna pattern, also at mm waves. However the beam steering is not simulated, i.e. you would need to create the "typical" antenna patterns resulting from the beam steering outside WinProp and then use them in WinProp for simulating the channel characteristics.
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