8344

Questions – Electrical engineering – Communication engineering – wireless communication – set 1
Question – 1
If a total of 33MHz of bandwidth is allocated to a particular FDD cellular telephone system which uses two 25kHz simplex channels to provide full duplex voice and control channels, computer the number of channels available per cell if a system uses:
(a) 4-cell reuses, (b) 7-cell reuses, (c) 12 cell reuse. If 1 MHz of the allocated spectrum is dedicated to control channels, determine an equitable distribution of control channels and voice channels is each cell for each of the three systems.
Question – 2
Consider an indoor wireless LAN with fc = 900 MHz, cells of radius 10 m, and nondirectional antennas. Under the free-space path loss model, what transmit power is required at the access point such that all terminals within the cell receive a minimum power of 10 µW. How does this change if the system frequency is 5 GHz?
Question – 3
Determine the critical distance for the two-ray model in an urban microcell (ht = 10m, hr = 3 m) and an indoor microcell (ht = 3m, hr = 2 m) for fc = 2 GHz.
Document Preview:

Questions – Electrical engineering – Communication engineering – wireless communication – set 1 Question – 1 If a total of 33MHz of bandwidth is allocated to a particular FDD cellular telephone system which uses two 25kHz simplex channels to provide full duplex voice and control channels, computer the number of channels available per cell if a system uses: (a) 4-cell reuses, (b) 7-cell reuses, (c) 12 cell reuse. If 1 MHz of the allocated spectrum is dedicated to control channels, determine an equitable distribution of control channels and voice channels is each cell for each of the three systems. Question – 2 Consider an indoor wireless LAN with fc = 900 MHz, cells of radius 10 m, and nondirectional antennas. Under the free-space path loss model, what transmit power is required at the access point such that all terminals within the cell receive a minimum power of 10 µW. How does this change if the system frequency is 5 GHz? Question – 3 Determine the critical distance for the two-ray model in an urban microcell (ht = 10m, hr = 3 m) and an indoor microcell (ht = 3m, hr = 2 m) for fc = 2 GHz.

Attachments:

questions—e….docx