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Macro & Micro Scale Spatial Rain Variation: Dynamic Millimetre Wave Communications in the Presence of Rain. C. Enjamio and E. Vilar. In collaboration with the universities of Vigo and Barcelona. Microwave Telecommunication Systems (MTS) Research Group University of Portsmouth.

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slide1
Macro & Micro Scale Spatial Rain Variation:Dynamic Millimetre Wave Communications in the Presence of Rain

C. Enjamio and E. Vilar

In collaboration with the universities of Vigo and Barcelona

Microwave Telecommunication Systems (MTS) Research Group

University of Portsmouth

slide4

Dynamic Millimetre Wave Communications in the Presence of Rain.

Global Microcell Scenario

Fixed Terrestrial and Satellite Systems

slide5

Dynamic Millimetre Wave Communications in the Presence of Rain.

Global Microcell Scenario

Fixed Terrestrial and Satellite Systems

data base

Satellite baseline and rain gauges distribution

distance (hm)

distance (hm)

Dynamic Millimetre Wave Communications in the Presence of Rain.

Data Base
slide8

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=1 min

slide9

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=2 min

slide10

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=3 min

slide11

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=4 min

slide12

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=5 min

slide13

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=6 min

slide14

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=7 min

slide15

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=8 min

slide16

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution

T=9 min

slide17

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=0 min

slide18

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=1 min

slide19

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=2 min

slide20

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=3 min

slide21

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=4 min

slide22

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=5 min

slide23

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=6 min

slide24

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=7 min

slide25

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=8 min

slide26

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rainfall Rate Spatial Distribution and Time Evolution. Isopleths

T=9 min

calculation of attenuation

Slant path attenuation

1 calculated attenuation

2 measured attenuation

Fading (dB)

2

1

time (minutes)

Dynamic Millimetre Wave Communications in the Presence of Rain.

Calculation of attenuation
slide28

Dynamic Millimetre Wave Communications in the Presence of Rain.

Broadband Wireless Acces; Different Network Topologies

  • Point to Multipoint or Star Topology
    • easier to deploy
    • no routing algorithms
    • low CPE cost
broadband wireless acces different network topologies

Dynamic Millimetre Wave Communications in the Presence of Rain.

Broadband Wireless Acces; Different Network Topologies
  • Mesh Topology
    • reconfigurability
      • new user
      • against fading
    • higher data rates
      • up to 500 Mbps
rain scattering

4 GHz

11 GHz

18.1 GHz

30 GHz

Dynamic Millimetre Wave Communications in the Presence of Rain.

Rain Scattering
  • Depends on
    • Raindrop Size Distribution
  • Mie Scattering Theory for Spherical Particles

Radiation pattern of a

1 mm diameter

sherical raindrop

slide31

Dynamic Millimetre Wave Communications in the Presence of Rain.

Calculation of the Interfering Power,

Normalised to PTGT

Case 1: Omnidirectional Tx antenna

SV

SV

slide32

Dynamic Millimetre Wave Communications in the Presence of Rain.

Calculation of the Interfering Power,

Normalised to PTGT

Case 2: Directional Tx antenna

SV

the communications research programme

Behaviour of an “Intelligent” System in the Presence of Rain

Dynamic Millimetre Wave Communications in the Presence of Rain.

The Communications Research Programme

Rainfall rate fields R(x,y,t)

Calculation

of

Scattering

Attenuation

F.O.M. Scattering

Bistatic Radar Eq.

Antenna Radiation Pattern

R.S.D

Countermeasures

Network topology

expected outputs

Dynamic Millimetre Wave Communications in the Presence of Rain.

Expected Outputs
  • Signal to Interference Ratio Contours
    • Coordination Distances
    • Co-existence of Systems

Towads an optimal utilisation of the

available (allocated?) Spectrum

  • Additional Contributions
    • Fade Statistics
    • Spatial and Temporal Correlation Between the ITALSAT F40 Beacon Attenuation and Rainfall Rate.
    • Diversity Improvements
    • Instrumentation requirements for radio propagation research addressing future Broadband Fixed Wireless Access
    • Polarisation Effects
slide35
Macro & Micro Scale Spatial Rain Variation:Dynamic Millimetre Wave Communications in the Presence of Rain

C. Enjamio and E. Vilar

In collaboration with the universities of Vigo and Barcelona

Microwave Telecommunication Systems (MTS) Research Group

University of Portsmouth

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