# HW-D1 - signal c If the receiving antenna is located 24 km...

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Homework Module D-1 * Mobile Networks Exercise 1. Assume that two antennas are half-wave dipoles and each has a directive gain of 3 dB. The antennas are aligned so that the directive gain numbers are correct. If the frequency used is 100 MHz, the transmitted power is 1 W and the two antennas are separated by a distance of 10 km, what is the received power? Exercise 2. A microwave transmitter has an output of 0 . 1 W at 2 GHz. Assume that this transmitter is used in a microwave communication system where the transmitting and receiving antennas are parabolas, each 1 . 2 m in diameter. a. What is the gain of each antenna in decibels? (Hint: for parabolic antennas, G = 7 A λ 2 , where λ is the wavelength and A is the surface of the parabola.) b. Taking into account antenna gain, what is the eﬀective radiated power of the transmitted
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Unformatted text preview: signal? c. If the receiving antenna is located 24 km from the transmitting antenna over a free space path, ﬁnd the available signal power out of the receiving antenna in dBm units. Exercise 3. If the received signal level for a particular digital system is-151 dBW and the re-ceiver system eﬀective noise temperature is 1500 K, what is E b /N for a link transmitting 2400 bps? Exercise 4. Determine the height of an antenna for a TV station that must be able to reach customers up to 80 km away. * Exercises are derived from Chapter 5 of “Wireless Communications and Networks” by William Stallings. 1...
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## This note was uploaded on 11/10/2011 for the course COMPUTER E 444 taught by Professor Amigo during the Fall '10 term at Al-Quds University.

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