Prezentacja programu PowerPoint

1
InterSystem Electromagnetic Compatibility
2
Evolution of communication systems
3
Indoor communication systems - characteristics
4
Technological congestion
5
Interference scenario
6
Bluetooth WiFi. Interference mechanism
7
Bluetooth other systems in ISM band
The performed theoretical studies have shown
8
Bluetooth IEEE 802.11b
The performed theoretical studies have shown
1. Collaborative solutions 1.1 TDMA 1.2
MEHTA 1.3 Interference Cancellation 2.
Non-collaborative solutions 2.1 Adaptive Packet
Selection and Traffic Scheduling 2.2 Adaptive
Frequency Hopping
9
Bluetooth IEEE 802.11b
10
Network QoS measurements - experience
11
Future research mixed configurations
measurements

1. 802.11b - 802.11g (interference)
2. 802.11a - 802.11g (gain)
3. Bluetooth - 802.11b/g (interference)

12
Indoor propagation effects
13
Indoor EMC path
14
Existing indoor propagation models
1. Statistical models 1.1 Amplitude
distribution 1.2 Phase distribution 1.3
Angle-of-arrival distribution 2. Empirical
models 2.1 ITU-R P.1238 2.2 Multilayer model
FAF 15(5?10)k dB
15
Deterministic models ray tracing
16
Indoor propagation - challenges

• Unknown ray tracing sensitivity to innacuracies
  
• 1.1 in material electric parameters
• 1.2 in geometrical dimensions (indoor floormaps)
• 2. Unresolved issue
• 2.1 role of diffraction

17
Multilayer structure innacuracy in electric
parameters analysis
18
Indoor propagation - future research