Mobile Cellular Systems - Alak Roy

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Frequency Division Multiple Access (FDMA) • The spectrum of each link (forward or reverse) is further divided into frequency bands • Each station assigned fixed frequency band frequency bands idle idle idle 8
Number of User Channels in AMPS • Bandwidth allocated to each user in each link (forward or reverse) is 30 KHz. • No. of user channels = Total bandwidth / user bandwidth = 25 MHz / 30 kHz = 833 • Is it enough? 9
Page 1 and 2: SLIDE #2.1 Mobile Cellular Systems
Page 3 and 4: Cellular Implementations (Gs) • 1
Page 5 and 6: Cellular Implementations(Gs) • 4G
Page 7: Frequency Division Duplex (FDD) mob
Page 11 and 12: Cellular Architecture MSC PSTN MS B
Page 13 and 14: Hexagonal Cells 13
Page 15: Example: K = 7 15
Page 18 and 19: Nyquist Bandwidth (for noiseless ch
Page 20 and 21: Signal-to-Noise Ratio • Ratio of
Page 22 and 23: Example of Nyquist and Shannon Form
Page 24 and 25: 24 HANDOFF IN CELLULAR SYSTEMS
Page 26 and 27: Handoff Decisions • Usually based
Page 28 and 29: Traditional Handoff Algorithms Choo
Page 30 and 31: Example Receiver Threshold 30
Page 32 and 33: Who and When • Who initiates hand
Page 34 and 35: Types of Handoff • Hard handoff -
Page 36 and 37: High priority for Handoff • In no
Page 38 and 39: Queuing Handoff Calls (QHC) • Que
Page 40 and 41: Queuing Handoff Calls • QHC can b
Page 42: Other practical problems with hando

Mobile Cellular Systems - Alak Roy

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