1. Basic examples of setting simulations: A REAL CASE
European Communications Office
Stella Lyubchenko
11-12 June 2013
EUROPEAN
COMMUNICATIONS
OFFICE
Nansensgade 19
DK-1366 Copenhagen
Denmark
Telephone:
Telefax:
Web Site:
Jukka Rakkolainen/ERO

2. Illustration of coverage and simulation radius in SEAMCAT
Victim Link
Receiver
(VLR)
(Origin of simulation)
Interfering
Link Transmitter
(ILT)
(Origin of
interfering
coverage)
Victim Link Transmitter (VLT)
victim
dRSS
Victim
iRSS
Victim link
Coverage radius
Interfering Link Receiver
(ILR)
Interfering link
Simulation radius
Wanted Receiver

3. Distance between the ILT and the VLR (simulation radius)
In this case Victim Link and Interfering Link operate at 1000 MHz, therefore simulation radius is define as follows:
Jukka Rakkolainen/ERO

4. Distance between the ILT and the VLR (simulation radius)
The It is located between 1 km and 10 km;
iRSS unwanted = Pe + Ge + Gr – L;
In this example if It located between 1 km and 10 km then iRSS unwanted will be in the range between dBm and dBm

5. Victim Link Transmitter (VLT) (coverage radius)
- User-defined radius;
- Noise-limited network;
- Trafic-limited network

6. VLT - coverage radius
The dRSS for a receiver located at the edge of the coverage area is calculated in the following way: dRSS=Pe+Ge+Gr-L if when dRSS = dBm

7. Calculation of simulation radius (Uniform density mode)
Within the simulation radius following number of active transmitters can be located uniformly:
For a single It
iRSS Unwanted = dBm
For 10 active It
iRSS Unwanted = dBm

8. Calculation of simulation radius (”none” mode)
In the “none” mode it is
also possible to define
Uniform density
of transmitters by using the Uniform polar distance
For the single transmitter with Rsimulation = km
iRSS Unwanted = dBm

9. Protection distance Calculations of iRSS Unwanted will be done
only if location of It satisfied to the following condition:

10. Power control Victim Link and Interfering operate at 1000 MHz.
Distance between the Victim and Interfering transmitter is 1 km.

11. iRSS Unwanted= 33(dBm)+11+9-(32.5+10log(1)+20log(1000)) = -39.5dBm
Power control
if power control is not activated then:
iRSS Unwanted= 33(dBm)+11+9-( log(1)+20log(1000)) = -39.5dBm

12. Power control
dRSS Wanted Receiver= 33(dBm) ( log(1)+20log(1000)) = -37.5dBm 1

13. Power control 2
-50dBm (threshold) + 3 · Step (5dB) > –37.5dBm > -50dBm (threshold) + 2 · Step (5dB)
The gain of Power control (git PC) = 10 dB then iRSSunwanted = -39.5dBm – git PC = dBm

14. –37.5dBm > -70dB (threshold) + 20 (dynamic range)
Power control 3
–37.5dBm > -70dB (threshold) + 20 (dynamic range)
iRSS Unwanted = -39.5dBm – git PC = -59.5dBm

15. Multiple Interferers generation (Option 1)
Add
Duplicate
Delete
Colocation of the interferers

16. Multiple Interferers generation (Option 2)
Generate Multiple interfering link

17. Multiple Interferers generation (Option 3)

18. Thank you - Any Questions?

19. Examples from ECC Reports 185 and 201

20. Calculations in 2483.5 – 2500 MHz band between healthcare facility MBANS (VLR) and LTE UL (ILT)

21. Victim characteristics Interferer’s characteristics
Calculations in – 2500 MHz band between healthcare facility MBANS (VLR) and LTE UL (ILT)
Victim characteristics
Units
MBANS
Receiver bandwidth
MHz 3
Receiver noise figure dB 10
Receiver antenna height m
1.5
Receiver antenna gain
dBi
Operating frequency
2498.5
N, receiver thermal noise
dBm
-109.1
ACS 25
Noise Floor
-99.1
I/N objective
Interferer’s characteristics
LTE UL
e.i.r.p 23
Bandwidth
ACLR
-30
Wall attenuation
Antenna height
Minimum path loss
87.25
See workspace

22. Positioning between MBANS (VLR) and LTE UL (ILT)
Postioning:
Interfering Tx fixed with respect to the victim receiver
No protection distance
Propagation model
Free space, no variation
Result:
Distance of ILT to VLR derived when P_interference = 0.1 %

23. Calculation with SEAMCAT on some examples of interference assessment for broadcasting service

24. Calculation of IP in the presence of noise only
Pmed = dBm, σ=5.5 dB
DTT receiver height: 10 m
DTT receiver gain: 0 dBi
No external interference is introduced
Equivalent noise power is dBm
Interference criterion is C/N = 20 dB
Propagation model: Extended Hata rural
Question
What is the initial IP ?

25. Adjacent channel simulations (scenario outline)
Size of broadcast pixel
100 m x 100 m
Operating frequency for WSD (IT)
600 MHz
8 MHz
DTT receiver (VR)
608, 616, 624 MHz
DTT receive antenna height
10 m
DTT receiver antenna gain
0 dBi
WSD antenna height
WSD E.I.R.P
20 dBm
Emed at coverage edge
56.21 dBµV/m  P = dBm, σ=5.5 dB
Propagation model
Extended Hata, rural

26. Adjacent channel simulations (SEAMCAT Victim link)
Distance between Vr and It: 20 m
Protection criteria:
PRco = 20 dB
1st channel = 30 dB
2nd channel = 40 dB
3rd channel = 50 dB

27. Adjacent channel simulations (example of results)
Interferer frequency
Victim frequency
R (distance
between Vr and interferer)
IP, %
600 MHz
608 MHz
0.02 km
97.37%
616 MHz
67.42%
624 MHz
19.54 %