Wireless Communications (Fall 2010) Iran University of Science and Technology Instructor: Dr. B.Abolhassani Homework- chapter4 Due Data: Monday,17 Aban 13891. Find the median path loss under the Hata model assuming fc= 900 MHz, ht= 20m, hr= 5 m and d= 100m for a large urban city, a small urban city, a suburb, and a rural area. Explain qualitatively the path loss differences for these 4 environments. 2. Using the indoor attentuation model, determine the required transmit power for a desired received power of -110 dBm for a signal transmitted over 100 m that goes through 3 floors with attenuation 15 dB, 10 dB, and 6 dB, respectively, as well as 2 double plasterboard walls. Assume a reference distance d0=1 and constant K= 0 dB. 3. The following table lists a set of empirical path loss measurements. Distance from Transmitter Pr/Pt(a) Find the parameters of a simplified path loss model plus log normal shadowing that best fit this data. (b) Find the path loss at 2 Km based on this model.
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