Transcript University Of Peloponnese Faculty of Economy, Management

University Of Peloponnese
Faculty of Economy, Management and Informatics
Department of Informatics and Telecommunications
Newcastle (UK)
Tripolis (Greece)
Michael Batistatos
(Academic Laboratory Teacher)
Wireless and Mobile Communications Lab
Electromagnetic Radiation Measurements
Wireless and Mobile Communications Lab
We are exposed to a sea of EM radiation
(nature sources, communication devices, power lines,
appliances e.g. microwave oven)
Wireless and Mobile Communications Lab
Wireless and Mobile Communications Lab
World goes wireless
Wireless and Mobile Communications Lab
Modern society – What are the sources of the microwave
radiation?
Wireless and Mobile Communications Lab
Wireless and Mobile Communications Lab
Equipment for RF measurements: Narda srm-3000
Wireless and Mobile Communications Lab
RF Bands
Wireless and Mobile Communications Lab
RF Spectrum Analysis
Wireless and Mobile Communications Lab
Real Scenario - Area and landscape
Wireless and Mobile Communications Lab
Yellow Pins: Measurement Locations
Red & Blue Pins: Mobile Phone Base Stations
Wireless and Mobile Communications Lab
Location A
Electric Field
Strength (V/m)
Location B
Location C
Can you explain
the graph of the
Location C
measurement?
Wireless and Mobile Communications Lab
Electric field strength
versus time
Some interesting
results
Wireless and Mobile Communications Lab
Exposure Limits by:
ICNIRP: International Commission on NonIonizing Radiation Protection
WHO: Worldwide Health Organization
Bioinitiative Report 2007 (proposed limit of 0.614
V/m) and 2012 (proposed limit of 0,036 V/m)
Wireless and Mobile Communications Lab
Example of
RF exposure
analysis
Frequency
Bands
(MHz)
Max
Electric
Field
Strength
(V/m)
Exposure
Reference
Levels 60%
Ε (V/m)
Exposure Ratio Λf
75-87,5
0,049131
21,7
87,5 – 108
FM RADIO
0,066765
108 – 230
TV-VHF
Uncertainty
+U
-U
B(Λf)
B(Λf)
0,0000051
0,00000
70
0,0000
040
21,7
0,0000095
0,00001
05
0,0000
066
0,67529
21,7
0,0009684
0,00107
27
0,0007
504
230 - 400
0,063033
21,7
0,0000084
0,00000
98
0,0000
061
400 – 470
TETRA
0,036552
21,30
0,0000029
0,00000
34
0,0000
025
470 – 885
TV - UHF
0,07119
23,09
0,0000095
0,00001
11
0,0000
069
885 – 960
GSM 900
0,2847
31,68
0,0000807
0,00009
33
0,0000
579
960 - 1710
0,12182
33,00
0,0000136
0,00001
57
0,0000
098
1710 –
1885 GSM
1800
6,8508
44,04
0,0241984
0,02995
80
0,0180
516
1885 –
2200
UMTS
3,7782
46,24
0,0066767
0,00826
58
0,0049
807
2200 2400
0,074246
47,2
0,0000025
0,00000
37
0,0000
020
2400 –
2483,5
WIFIRLAN
0,064484
47,2
0,0000019
0,00000
28
0,0000
015
2483,5 3000
0,15136
47,2
0,0000103
0,00001
55
0,0000
085
Total
exposure
ratio
0,0319880
95% confidence
interval
Uncertainty
+U
0,0394695
-U
0,0238885
Λ2,5%
Λ97,5%
0.0081
0,0715
Conclusion:
In the Limits
(The total
exposure ratio is
31 times under the
exposure reference
levels)
Wireless and Mobile Communications Lab
Location
Environment
Total value
Ε (V/m)
Bioinitiative Ebio
(V/m)
Times above/below
Hondos Center
urban
4,003661056
0.614
42,5 above
Πλ. Αγ. Βασιλείου
urban
1,461722264
0.614
5,7 above
ΟΤΕ 2
urban
1,163019113
0.614
3,6 above
Πλ. Κολοκοτρώνη
urban
0,838044459
0.614
1,8 above
ΕΥΔΑΠ
urban
0,744563805
0.614
1,5 above
Παιδική Χαρά
urban
0,644091512
0.614
1,1 above
ΟΤΕ 1
urban
0,558388418
0.614
1,2 below
Δημοτικό Σχολείο
urban
0,474597871
0.614
1,7 below
ΒΙΠΕ
suburban
0,471235704
0.614
1,7 below
Νοσοκομείο
suburban
0,3971682
0.614
2,4 below
4ο Γυμνάσιο
urban
0,387266509
0.614
2,5 below
Πανεπιστήμιο
suburban-rural
0,382382428
0.614
2,6 below
Στάδιο (πίσω)
suburban
0,367865548
0.614
2,8 below
2ο Λύκειο (LoS-περιπτωση)
suburban
0,316994893
0.614
3,7 below
4ο Νηπιαγωγειο
suburban
0,294429056
0.614
4,3 below
Στάδιο
suburban
0,294390583
0.614
4,3 below
ΙΚΑ
suburban
0,258114301
0.614
5,7 below
8ο Νηπιαγωγείο
suburban
0,242179641
0.614
6,4 below
1ο Λύκειο
suburban
0,240301014
0.614
6,5 below
2ο Λύκειο (ΝLoS-περίπτωση)
suburban
0,23600913
0.614
6,8 below
Άλσος Αγ. Γεωργίου
suburban-rural
0,22261223
0.614
7,6 below
Wireless and Mobile Communications Lab
No L.O.S. Τέλος Διαδρόμου με θόρυβο 800.2ΜΗz,BW:200KHz
E(V/m),
5 cm distance, weak signal
V/m
40,00
35,00
30,00
25,00
20,00
15,00
10,00
5,00
0,00
1
5
9
13
17
21
25
29
33
37
41
45
49
53
57
61
65
69
73
77
81
85
89
93
97
101 105 109 113
Measurement Number (0-14s)
L.O.S. BASKET 800.2MHz, BW:200Mhz
E(V/m),
5 cm distance, strong signal
12,00
10,00
V/m
8,00
6,00
4,00
2,00
0,00
1
13
25
37
49
61
73
85
97
109
121
133
145
157
169
181
193
Measurement Number(0-30s)
Electric Filed Strength measurement when the
mobile phone is transmitting in GSM mode
205
217
229
Wireless and Mobile Communications Lab
Practical approach to communications
systems in Matlab-Simulink
-Introduction to Simulink
-Build simple systems
-Study PCM modulation
Wireless and Mobile Communications Lab
Introduction to Simulink
Download the pdf and mdl files and follow the instructions
Pdf file: Introduction to Simulink
Mdl file: Intro.mdl
Wireless and Mobile Communications Lab
Build simple systems
Download the pdf and mdl files and follow the instructions
Pdf file: Pulse Amplitude Modulation (PAM)
Mdl file: PAM.mdl
Wireless and Mobile Communications Lab
Study PCM modulation
Download the pdf and mdl files and follow the instructions
Pdf file: Pulse Code Modulation (PCM)
Mdl files: Sampling.mdl , Quantization.mdl , PCM.mdl
Wireless and Mobile Communications Lab
Thank you
Questions?