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Unformatted text preview: EE 497A: FUNDAMENTALS OF WIRELESS COMMUNICATIONS SP10 HOMEWORK ASSIGNMENT I Assigned date (revised): 02/13/2010; Due date: 02/22/2010 in class IMPORTANT NOTE: 1) Assignments are individual effort only. No discussion with classmates is allowed. 2) Assignments are due at the beginning of class period. 3) Please note that late homeworks will not be accepted under any circumstance. 1. Suppose that, by law, a service operator is not allowed to radiate more than 30 watts of power. Using the two-ray model, what antenna height is required for a service radius of 1 km? 10 km? Assume that the receiver sensitivity is -100 dBm. 2. Propagation measurements indicate that the median path loss at 420 MHz in a midsize city can be modeled with n = 2.9 with a fixed loss ( ) of 20 dB. Assuming a cell phone receiver sensitivity of -90 dBm, what transmitter power is required to service a circular area of radius 15 km? Now assume that in the same city, the deviation about the median path loss was estimated to km?...
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- Spring '08