cellular device detection
DESCRIPTION
Instructor : Yossi Hipsh Performed by : Smadar Katan Gal Mendelson Project Number: D0517 Winter 2007/8 Semesterial Project. Cellular Device Detection. Midterm Presentation . General specifications. Room size : 4mX6m. The tables are 0.7m high. - PowerPoint PPT PresentationTRANSCRIPT
Cellular Device Detection
InstructorInstructor :: Yossi HipshYossi Hipsh Performed byPerformed by:: Smadar Katan Smadar Katan
Gal Mendelson Gal Mendelson Project Number: D0517Project Number: D0517
Winter 2007/8Winter 2007/8
Semesterial ProjectSemesterial Project
Midterm PresentationMidterm Presentation
General specifications
• Room size : 4mX6m.
• The tables are 0.7m high.
• 2 Multi-beam antenna at each side of the room for full coverage.
The Room
θroom θroom
General specifications (Continue…)
• So far there was a solution for one cellular device in the room.
• Our project deals with two cellular devices in the room
• The devices are far enough from one another that they will be received in two different pairs of beams.
General specifications (Continue…)
CompanyTransmission Frequency
Partner902.2-910 MHz 947-955.2 MHz 910.2-912.2 MHz 955.2-957.2 MHz
Cellcom835-845 MHz 880-890 MHz1710-1712 MHz 1805-1807 MHz
Pelephone825-835 MHz 870-880 MHz845-847 MHz 890-892 MHz
General specifications (Continue…)
CompanyTransmission Frequency
Partner902.2-910 MHz 947-955.2 MHz 910.2-912.2 MHz 955.2-957.2 MHz
Cellcom835-845 MHz 880-890 MHz1710-1712 MHz 1805-1807 MHz
Pelephone825-835 MHz 870-880 MHz845-847 MHz 890-892 MHz
General specifications (Continue…)- power of Mobile Station
Mobile ClassGSM 900GSM 1800
130 dbm = 1 Watt
224 dbm = 0.25 Watt
336 dbm = 4 Watt
4
5
Since we are dealing with Cellcom for now we will focus on GSM:
Mobile stations can come in different power classes, which define the
maximum RF power level that the unit can transmit.
For GSM-900 there are five powers classes, for GSM-1800 there are three
power classes.
Solution suggestion
Energy Detector
Energy Detector
Energy Detector
Energy Detector
Comput ing Unit
Displ ay
Our Part
Contr ol l er
Our Part Our Part
Beams M
B
A
B
F
N
Beams M
B
A
B
F
N
Antenna frequency:
Wave length:
Definitions and Sizes
• 4 Dipole Antenna Array: (the sizes are from measurement)
1.7[ ]f GHz
d=43cm
57/8 cm
3.8cm
7.8cm
8
9
3*10 sec17
11.7*10sec
mc
cmf
17 cm
Definitions and Sizes (continue…)
• The angles are:
3
51* 51*0.1721
0.43dB d
•Where 9 (deg ) 33dB ree
Beams’ angles
Calculations (continue…)
9 (deg )
584
2Room dB ree 2 2 2 2 26 4 (6 ) 4 2* 4 (6 ) 4 *cos Roomx x x x
X=0.5m
In order to maintain symmetry we will place the antenna as following:
Geometry
BFN
Rec iever
Rec iever
Rec iever Ener gy det ec t or
Ener gy det ec t or
Ener gy det ec t or
Rec iever
Rec iever
Rec iever Ener gy det ec t or
Ener gy det ec t or
Ener gy det ec t or
The Beams
• To manufacture beams that point to different directions we need to change the length of the micro strip lines in the following way:
The Beams (continue…)
• Let’s observe two dipoles
• We see that • L=11.6 cm
11sin sin
dd L
L
The Beams (continue…)
Now we can determine:
Computing
Location
2 2 2 20.5 2 4.25 4.25 2.061 ; 5.5 2 34.25 34.25 5.85
21 1
2
0.5 4.25 4 4 4.25 cos 14
42 14 28
Calculation of rotation angle of the antenna:
From the "Law of cosine":
Location
Supervisor
Antenna B
Antenna D Antenna C
280
Y
X(0,0)
Antenna A
280
eAeB
A B
Location (continue…)
Time Schedule
- Design and manufacture BFN for two beams
which includes
- BFN for θ angle (manufacturing 2)
- Power combiner network 2:1 (manufacturing 8)
- Integrating .
17.02.08
-Developing the Simulator 17.03.08
-Final report and presentation 1.04.08