Mobile Cellular Systems - Alak Roy

More documents

Recommendations

Info

1G <strong>Cellular</strong> <strong>Systems</strong> • Many Different Standards: – AMPS (US) – NMT (Northern Europe) – TACS (Europe) – NTT (Japan) – many others... • Spectrum – around 800 and 900 MHz 6
Frequency Division Duplex (FDD) mobile Forward Link Reverse Link Two separate frequency bands are used for forward and reverse links. Typically, 25 MHz in each direction. base station AMPS: 824-849 MHz (forward or downlink) 869-894 MHz (reverse or uplink) 7
Page 1 and 2: SLIDE #2.1 Mobile Cellular Systems
Page 3 and 4: Cellular Implementations (Gs) • 1
Page 5: Cellular Implementations(Gs) • 4G
Page 9 and 10: Number of User Channels in AMPS •
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

Create successful ePaper yourself

Delete template?

Save as template?