Page 388 - Integrated Wireless Propagation Models
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366    C h a p t e r   S i x






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                                                      1 2
                                                   1 3    11
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                                                 1        1 0
                                               1 5    •
                                             1 6    •  •   •
                                          1 7 .
                                        18          contour
                                      19  ;•
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               FIGURE 6.4.1.2  The  n teraction of the Lee overa l   model-test environment. (A color version of
               this figure is available at www.mhprofessional.com i wpm. )
                                                    j

               with a number in Fig. 6.4. . 2 represents a calculation point, and each  s   about  0   m apart.
                                    1
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                                                                              5
               The calculation of points 12 and 14 are described in detail later.
                  The test sample points are chosen, some of them in picocell, some of them in micro­
               cell, and some of them in macrocell. These details are shown and discussed in the fol­
               lowing sections. The star symbol shown on the far right is the macrocell site, the triangle
               symbol shown in the middle is the microcell site, and the circle symbol shown in the
               building on the far left is the picocell site. Note the scale does not reflect the real dis­
               tance and height of the terrain, building, and cell sites.
                  The test environment is broken down into two separate environments for easier
               analysis: the macro and the pico combined with the micro. The pico- and microenviron­
               ment is shown in Fig. 6.4.1.3(a) and (b).
                  The red circles show the prediction locations from the picocell site, and the green
               circles show the prediction from the microcells site.
                  As shown in Fig. 6.4.1.3(a), the red circle shows the prediction locations from the
               picocell and the green circles show the prediction location from the microcell sites. This
               is from the side view.
                  We will start discussing pico, micro, and then macro and finally integrate the cover­
               age plot from all three different models.

               6.4.2  In-Building Cell-Point-by-Point Analysis for the  Lee In-Buil i n g Model
                                                                            d
               Figure 6.4.2.1 (a) shows the top view of a picocell site, and Fig. 6.4.2.1 (b) shows a
               microcell site. The selected 15 sample points  (red dots in picocell and green dots in
               microcell) are shown in the figure. Coverage of each region, either picocell or microcell,
               is calculated, and then two coverage regions are combined by selecting the best values
               of signal at each sample.
                  Three points-5, 7, and 13-are selected from Fig. 6.4.2.1(a) and calculated for dem­
               onstrating the prediction values from the Lee picocell model.
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