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reinerh

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Everything posted by reinerh

  1. With "Combine Data - Max Value " just the max. value for each pixel (from the two results) is used in the final result.
  2. The ray paths computed in ProMan (with the ray tracing models or the dominant path model) can be exported by activating the propagation path output under the Propagation tab. Then the rays are written to a file with suffix *.str. The syntax of this ASCII *.str file is described in the ProMan user manual (if you search for ’str file’), please see the figure below. In ProMan it is also possible to display the computed rays together with the results (e.g. Rx power or pathloss). For this purpose you can use the ray buttons on the upper part of the tool bar on the right.
  3. The WinProp time-variant module allows to assign a trajectory and speed profile to specific object groups (e.g. car on a street). Please have a look in the corresponding chapter 3.8.10 of the WallMan user manual and corresponding sample project under Altair Connect. Then in ProMan the transmitter can be assigned to such a moving object group and the several snapshots of the time-variant scenario with the moving transmitter can be computed, based on the definition of start time, end time, and time increment.
  4. There are two ways to compute the total power of all antennas. Either by defining a network planning project in ProMan using an air interface definition (wst) file. Then by using RunNet the propagation results for the individual antennas will be superposed and the total coverage and interference situation is computed. Alternatively you can load the first result (*.fpp file) in ProMan and combine the results for the further Tx antennas via Edit => Combine Data => Max Value.or via Edit => Add Data => delog (incoherent).
  5. Hello, In case of the direct ray (where the material properties do not matter) also the four different cases Tvv, Tvh, Thv, Thh are analyzed. So what happens in case of Tx antenna with v-pol and Rx antenna with v-pol, and so on for the other cases. As for the direct ray no interactions (like e.g. reflections) are included just the direct ray is analyzed and then Tvv as well as Thh describe the corresponding complex transmission factor in linear scale (depending on the distance) while Tvh as well as Thv are almost zero due to the polarisation mismatch. The first letter stands for the Tx polarization and the second letter for the Rx polarization, so Tvh is for vertically polarized transmission with horizontally polarized reception and Thv evaluates the case for Tx H pol with Rx V pol. The individual transmission matrix components (linear factors) indicate how of the radiated signal is received by the receiver (including the Tx and Rx polarizations). Best regards
  6. The computation of the radio coverage in WinProp can be done in a first step for each RF system (typically each RF system uses its own frequency band). Based on assumptions how much power will be radiated from the Tx antennas into the other frequency bands (and how the reception of the other frequency bands will be attenuated on the receiving end) in terms of an adjacent channel leakage ratio (ACLR) it is then possible to post-process these radio coverage plots for the individual RF systems to determine the interference situation. In a WinProp network planning project (e.g. for LTE or WLAN) generally only the co-channel interference is computed, while the adjacent channel interference is neglected. This means for the determination of the interference on a specific frequency band (RF system) a project with the Tx antennas for all the considered RF systems can be defined and then the Tx power for the Tx antennas of the other RF systems can be reduced by the above mentioned ACLR (which needs to be derived outside of WinProp).
  7. Hello Publi, independent from the observed behaviour when using the two-path model for low tx antenna heights (there might be some limitation due to the grazing incidence causing lower attenuation rates than 40 dB per decade in distance) I am wondering why you are using the two-path model for the mentioned scenario of a parking garage. Because in such a scenario you will always have more than two paths (i.e. besides the direct ray, ground reflection also ceiling reflection, reflections at the vertical walls, ...). Therefore in such an indoor scenario the propagation exponents are typically not above 20 dB per decade and in some cases (e.g. in tunnels) even lower. On the other hand I am wondering why you measured 40 dB attenuation in such an environment.
  8. The WinProp 14.1 installer available on Connect at the moment will run after having installed the vcredist_x86.exe (MS Visual C++ Redistributables Update 3) available under: https://www.microsoft.com/en-us/download/details.aspx?id=53587
  9. Hello, you can use the DPM model even without preprocessing, i.e. by using the *odb file for an urban scenario or the *.idb file for an indoor scenario. Then the computation will be performed in the area defined under the Simulation tab. Best regards
  10. Hello, the breakpoint describes the physical phenomenon that from a certain distance on the received power decreases with 40∙log(distance) instead of 20∙log(distance) which is valid for the free space propagation. This is due to the superposition of the direct ray with a ground reflected contribution. The theoretical value of the breakpoint distance is calculated according to 4∙PI∙hTx∙hRx/λ. So depending on the used frequency you can compute the breakpoint distance in your case, e.g. for 2 GHz with 4.5m height for Tx and Rx the breakpoint distance is 1696m, i.e. far beyond the shown minima in the below figure (first 100m). Basically the increased propagation exponent after the breakpoint is because the last minima is asymptotically approached.
  11. Hello, the transmission matrix considers both polarization states (V and H) for the computations, which means it is independent of the assignment done at the transmitter in your project as both cases (V and H pol) will be computed in any case and provided in the corresponding results. For the interactions (reflections, transmissions, diffractions) the defined material properties are considered. Best regards
  12. Hello, there is no fix limitation in ProMan regarding the number of points which can be considered. The error 953 indicates that under the Parameters tab => IRT settings the number of (total) interactions (Max reflections AND diffractions) on the right is smaller than the number of reflections and/or diffractions defined on the left part of the settings dialogue. Best regards
  13. Hello, the phase information is not explicitly computed in ProMan, only the propagation delay which is saved in the ASCII *.str file for each ray (as well as the number and type of interactions for this ray). The phase information would need to be computed manually outside ProMan, based on the delay plus considering a phase shift of Pi for each reflection. Best regards Reiner Hoppe
  14. Hello, this problem was also reported by some other users and we fixed it in the meantime. Please download the updated WinProp V14 package which is available under Altair Connect. Thanks
  15. There are two ways to get the information about the max. building height plus topography in an urban scenario. First approach would be to run a preprocessing (e.g. for DPM model) with the urban building vector data (odb file) and the topo data (tdb file) in WallMan and activate here under the General tab of the WallMan preprocessing parameters the output of the "absolute building height". Then a corresponding height file will be generated in WallMan which can be displayed in ProMan. Second approach would be to use ProMan. When having the urban project loaded in ProMan the "Balloon tip" button can be used (2nd lowest button from the tool bar on the right side of the ProMan screen) to display the corresponding heights.
  16. Generally the indoor and outdoor pixels can be separated using a mask file (which is a WinProp binary result file including the value 1 for those locations/pixel which shall be considered and the value 0 for those locations/pixels which shall be skipt). For urban scenarios such a mask file can be generated at the preprocessing in WallMan. For this purpose you need to activate under the General tab of the urban prerpocessing parameters under the optional output files the morpho clutter data with height interval of e.g. 1000m (should be larger than the highest building). Then during the preprocessing an *.mdb file in the defined resolution will be generated with the value 1 for the indoor pixels and the value 0 for the outdoor pixels. Then just rename this *.mdb file to *.mas and use it for the masking in ProMan by loading e.g. an *.fpp result file and then select Edit => Mask Data => Mask Result file. After this only the indoor pixels will remain in the result.
  17. You can use the WinProp global material catalogue which includes the electrical properties for typical construction materials (brick, concrete, wood, ...) for a wide frequency range up to 75 GHz (including also 30 GHz). The latest catalogue is available for download on the WinProp homepage. Please send an e-mail to winprop@altair.de if you need the account information for the download.
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