Cellular Expert Radio Links module is designed for fixed wireless networks. It can be used to analyze and plan point-to-point transmission networks, including microwave links and radio-relay lines. Implemented algorithms allow prediction of path loss, link power budget calculations, performance and availability evaluation, interference analysis and power-flux density calculations. Also, analysis and planning capabilities are extended to point-to-multipoint access networks with cellular structure. These cover broadband wireless services such as Local Multipoint Distribution System (LMDS), Multipoint Multichannel Distribution System (MMDS) and Wireless Local Loop (WLL). Built on the top of GIS platform, it enables easy management of the radio link features on the map, terrain and clutter. Graphical user interface allows access to radio equipment database for previewing and editing of antenna radiation patterns, transmitter-receiver parameters, digital radio channel data and frequency plans.
The Radio Links module as a part of the Cellular Expert software is based on the ArcGIS platform. It exploits GIS functionality of ESRI ArcGIS system. Radio Links also makes use of the radio data management routines, implemented in the Cellular Expert core and path profile analysis algorithms from the Cellular Expert Profile. Integration with Crystal Reports is implemented in order to generate customizable reports.
At the data level, ArcGIS system with personal or SDE geodatabase is deployed. Implementation of various options for multi-user support is also available.
Radio Links provides the following functionality:
| Point-to-point analysis |
Path Loss: ITU-R P.525-2
1st Fresnel zone ellipsoid: ITU-R P.526-5
Path clearance: ITU-R P.530-7
Specific attenuation: ITU-R P.676-3 using input from ITU-R P.837-1, ITU-R
P.838 and ITU-R P.839-1.
Rain Attenuation: ITU-R P.530-7
Diffraction:
Single knife-edge (ITU-R P.526-5);
Deygout (ITU-R P.526-5);
Spherical Earth (ITU-R P.526-5);
Average (ITU-R P.530-7). |
|
Radio equipment data management |
Parabolic and sector antenna editors:
Tabular radiation pattern representation with inplace editing;
Graphical radiation pattern representation in linear and logarithmic scales
Modulation performance editor;
Tabular and graphical representations of the BER v.s. fade margin
dependencies; Approximation by formula;
Defined curves for BPSK, QPSK, DQPSK, FSK-M, QAM-M modulations
Carriers list editor
Frequency plans for simplex and duplex channels;
Tabular and graphical representations;
Spectrum mask editorSpectrum density mask editing;
Automatic mask generation for predefined bandwidth;
Tabular and graphical representations. |
|
Radio link management |
Creating
Editing
Deleting
Visualization |
| Radio link budget analysis |
Path profile analysis
Free space loss
Clearance
Sub-path diffraction
Atmospheric attenuation
Diffraction (average, single knife-edge, Deygout) Power budget
Received signal level
Thermal fade margin
Composite fade margin
BER |
| Interference analysis |
Interference level prediction;
C/I protection ratios for co- and adjacent-channels;
Fade margin loss objectives. |
| Radio link systems |
Point-to-point systems
radio relay lines
Point-to-multipoint systems
LMDS
MMDS
WLL |
| Radio link performance analysis |
ITU-G.821 recommendation targets
Parameters: ESR, SESR, unavailable time ratio;
Local grade portion (ITU-R F.697);
Medium grade portion (ITU-R F.696);
High grade portion (ITU-R F.557).
ITU-G.826 recommendation targets
Parameters: ESR, SESR, BBER;
National portion (ITU-R F.1189):
Access network
Short haul network
Long haul network
International portion (ITU-R F.1092):
Terminating countries;
Intermediate countries |
Cellular Experts Radio Links Software Requirements
For Cellular Expert Radio Links ArcView/ArcEditor license is required.
Contact us: E-mail cellexp@hnit-baltic.lt, Tel. +370 5 2150575
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