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Figure 1: TDD Transmission

Find the attenuation due to rain (in dB/Km) if vertical polarization is used in a WLL link in a climate region H where the link is available 99.7% of the time. Operation frequency is 30 GHz.

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Figure 1: TDD Transmission

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  1. Find the attenuation due to rain (in dB/Km) if vertical polarization is used in a WLL link in a climate region H where the link is available 99.7% of the time. Operation frequency is 30 GHz

  2. Find the first freznel zone if a communications link is to be established between an user and a service provider if the link is in LoS over 10 Km. The concern point is an historic tree located 3 Km from the transmitter antenna and the operation frequency is 15000 MHz.

  3. The diagram shown in Figure 1, depicts a transmission using time division duplex. One of the ISDN defined interfaces provides a data rate (R) of 384 Kbps. And uses a frame size of 48 bits. If we use TDD with a block size twice the frame size, the distance between the subscriber and the network switch is 2.5 Km and the guard time is 0.5ms. Find (assume transmission speed equals speed of light) Figure 1: TDD Transmission • a) Find the Burst Transmission Time • b)Find the propagation Delay

  4. c)Find the actual data rate on the medium

  5. A LOS microwave link 12Km long is planned for installation in Germany, which is in climate zone H (table in the appendices). The operational frequency is 30 GHz and the desired time availability of the link is 99.99%. Local rain statistics are not available. The antenna polarization is horizontal. Determine, what amount of total attenuation is to be anticipated? - For FSL assume antenna gains = 1

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