InterSystem Electromagnetic Compatibility. Evolution of communication systems.

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Presentation transcript:

InterSystem Electromagnetic Compatibility

Evolution of communication systems

Indoor communication systems - characteristics

Technological congestion

Interference scenario

Bluetooth – WiFi. Interference mechanism

Bluetooth – other systems in ISM band 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 Bluetooth – IEEE b The performed theoretical studies have shown:

Bluetooth – IEEE b

Network QoS measurements - experience

Future research – mixed configurations measurements b g (interference) a g (gain) 3.Bluetooth b/g (interference)

Indoor propagation effects

Indoor EMC path

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]

Deterministic models – ray tracing

Indoor propagation - challenges 1.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

Multilayer structure – innacuracy in electric parameters analysis

Indoor propagation - future research