What is pathloss software

If the receiver is close to the transmitter it can capture more power. If the receiver is further away from the transmitter, the density of the power is smaller and the receiving antenna captures only small fraction of the transmitted power.

The figure below depicts this phenomenon:. As we already know, the power of the signal reduces as the signal propagates. But what is the relation between the loss and the distance? Is the distance only variable in this equation? There are several parameters involved: distance, wavelength and the transmit power. Pathloss PL depends on distance and wavelength.

The above formula confirms our observation, that greater distance means lower power. Attenuation is higher for shorter wavelengths. This means that high frequency signal i.

That is one of the reasons why Power loss does not depend on transmitted power. If the attenuation of the path is 20dB it will affect a strong signal in the same manner as a weak signal. The difference will be visible in the received power though.

In the figure below you can see the values of the pathloss for different frequencies. You can notice how different frequencies are attenuated along the traveled distance.

Click Import, and then click Close when the process is complete. Pre-Planning Routes 1. Read through the contents on network, transmission and line construction in the tender document and digest these contents. Sort out the required information. If the clauses that are required for the network planning but are not specified in the tender document, communicate with the operator and clarify the doubts.

Fully understand the bidding strategies of the project team. Determine the required conditions for pre-planning the microwave transmission routes, based on the requirements of the tender document, the conclusion reached after the communication with the project team, and the output of the radio network planning.

These required conditions are described as follows: Bidding strategies of the project team KPIs Transmission modes of the backbone network network between cities Selected microwave products Maximum antenna heights Adopted protection modes. Pre-Planning Routes Risk factor of the microwave BOQ Frequencies Geographical location of the nation, that is, the hemisphere, longitude, and latitude where the nation is located.

When the Pathloss software is used to pre-plan the microwave transmission routes, the following aspects are involved: Divide the work of personnel involved in the project microwave planning and design and making out the plan.

Produce the project-level microwave transmission distance calculation table. Determine the graphic example of the project-level microwave planning and design and outputting the format. Determine the microwave network topology to design the network at different layers, that is, backbone layer, convergence layer, and access layer.

Increase the distance of routes in the SDH backbone network to a proper length to decrease the number of SDH microwave hops, choosing curved profiles, and capitalizing on the local terrain condition. In the displayed Generate Profile dialog box, click Generate and then click Close.

Drag the mouse to connect Site38 and Site Click on the connection line, and select Summary. Based on the data in Calculated Distance km , enter the proper value in Frequency. This hop of link adopts the central frequency point MHz of the 13 GHz frequency band. Click Generate in the Generate Profile dialog box, and then click Close.

Doubleclick the blank area under Structure, and then select Range of Structures. Set the height of the structure in the example, a tree of 15 meters. Select any point on the profile, and you can modify the related parameters, for example, distance, elevation, structure, scale and ground. Labeling a Link Labeling a link by default labeling the site distance only Right-click on a link and select Label, and the Label dialog box is displayed.

Select Distance, and deselect Do not draw. Enter the information of the link in the blank of the dialog box. You can also adjust the font size and position of the characters. After the process is complete, click OK. Labeling a link in a customized way labeling any information on the link Right-click on a link and select Label, and the Label dialog box is displayed. Deselect Do not draw. Outputting the Information Outputting Outputtingthe the terrain diagram terrain diagram.

Site38 Latitude 20 11 Site40 Latitude 20 08 Double-click Pathloss 4. The number of files is determined by the number of links. In this case, the PDF documents containing the profile diagrams are generated in batches. Double-click on a certain link whose PDF document containing the profile diagram was created previously.

Select the PDF document, and select and insert all the other created PDF documents containing the profile diagrams of other links. Click OK. Select the site information to be output, and then click OK. In this case, the report is saved as a CSV file. The networking diagram is output as a PDF document. Set the size of the paper, and then click Properties. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Explore Ebooks.

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Explore Documents. Application of The Pathloss Software-A. Uploaded by Dimas Rio. Did you find this document useful? Is this content inappropriate? Report this Document. This analysis can now be carried out using ray tracing for the earth radius factor or antenna height variables. This method considers terrain reflections over the entire path and is a better representation of the actual behaviour of the path.

The variable gradient ray trace now uses the surface ducts, elevated surface ducts and elevated duct data in the ITU-R P. M-profiles and the probability of their occurrence are calculated using the site coordinates from this data. All reports are created in an integral RTF full featured word processor. This allows text and graphics to be combined in the reports. The following options for clutter land cover, morphology have been implemented: The clutter database only contains a description of the clutter.

The user specifies the heights to be used for the various clutter types in a clutter definition table. This clutter definition can be edited for individual link designs The clutter database contains the actual height of the clutter. No descriptions are available.

The clutter elevations are determined from the difference between the primary DEM and the clutter database.

For example, the primary DEM could contain embedded building heights and the clutter database could contain terrain elevations only. The terrain profile would be created using the ground elevations and the clutter would be the difference between the two database elevations.

In a description only clutter database, the various clutter types are cross referenced to ten standard clutter definitions. These standard definitions are used in local and area studies for the location variability and the clutter loss as a function of frequency at the remote location. Version 4 coverage analysis uses a series of radial profiles with calculations at uniform increments along the profile.

This produces a high concentration of data in the central area which decrease at the edges. Version 5 uses the concept of cells for both local and area studies to provide a uniform data density. The user specifies the cell size and a tolerance. The tolerance determines the location of the calculation point within the cell. A tolerance of 0 means that the calculation point is the exact center of the cell. A tolerance of 1 means that the calculation will be somewhere in the cell.

Radial profiles are still required for the analysis; however, calculations are only made at the points as determined above The tolerance parameter affects the number of profiles required to generate the study and the calculation time. Local studies are always a circle centered on the base station.

Area studies can be rectangular, elliptical or a user defined polygon. The following additions to the diffraction algorithms allow the studies to be carried out for an aircraft as the remote station. Antenna heights can be specified relative to ground level or sea level. Antenna heights greater that 1 kilometer are corrected to account for the exponential refractivity gradient.

Either the earth radius factor - K or the surface refractivity can be specified. Digital elevation models Terrain data is not supplied with the program. The following digital elevation data formats are supported:. An ODBC interface open database connectivity is provided to connect to a user's database.

The connection is defined by the ODBC drivers supplied with the users data base. The database consists of a predefined set of relational tables.