Developed by Baiju Paul Mathews
at Qualcomm.
Improved by Hyoup Sang Yun
at KAIST.
Improvement: When the number of interferers is less than
six, the C/I is computed by assuming six interferers.
Note: Currently this applet has some problem with some versions of Browsers. Try using a latest browser if you have difficulties.
This Java applet plots a hexagonal reuse pattern for a given reuse size. The applet also computes the signal strength, the strength of all the interferers, the reuse size and the C/I ratio.
The reuse size can be changed by changing the i and j values.
In Normal Mode
The cells using the same frequency are marked with the same color.
When mouse is moved within the applet, the applet computes the cell which
is closest to the mobile. The mobile is assumed to be at the mouse position.
The cell which is closest to the mobile is marked by a + sign.
In the Black and White Mode
When the mouse is moved within the applet, the cell which is closest
to the mobile is indicated by a red color, the co-channel interferers are
indicated by the black color and other cells are indicated by white color.
The normalized Carrier signal strength is then calculated using the inverse fourth power law. This is the C field.
The signal strength of all the other cells using the same frequency is then calculated and summed to the find the strength of interference. This is the I field.
The C/I is then computed and displayed in the C/I field.
Interesting Questions.
a) What happens when the mouse is at the exact location of the center
of cell (distance = 0)? How do you think this is handled?
Source Code Hexagon.java here.