Basic examples of setting simulations European Communications Office Jean-Philippe Kermoal (ECO) October 2010 EUROPEAN COMMUNICATIONS OFFICE Nansensgade 19 DK-1366 Copenhagen Denmark Telephone: Telefax: Web Site:

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 205 October 2010 Outline Step 1: How is the dRSS calculated? Step 2: My first interference probability calculation Step 3: Probability of interference Step 4: Where does the interference come from?

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 305 October 2010 Step 1: How is the dRSS calculated?

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 405 October 2010 Define Victim receiver (Vr)  Operating frequency  Receiver bandwidth  Antenna Characteristics  Interference criteria  Noise floor Define Wanted transmitter (Wt)  Tx power  Antenna characteristics Position the Wt vs Vr You will learn from Step 1 how to... Calculate the dRSS Test propagation model Launch simulation Extract dRSS vectors ✓ ✓ ✓ ✓ ✓ ✓ ✓

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 505 October 2010 SEAMCAT scenario Wanted Transmitter (Wt) Victim Receiver (Vr) Wanted Receiver (Wr) Interfering Transmitter (It) dRSS iRSS Victim link Interfering link

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 605 October 2010 Victim Link Wanted Transmitter (Wt) Victim Receiver (Vr) dRSS Victim link

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 705 October 2010 Define Victim frequency

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 805 October 2010 Define Victim Receiver (VR)

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 905 October 2010 Define Wanted Transmitter (Wt)

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1005 October 2010 Position of the Wt (1/2) Uncorrelated cases mode User-defined Radius Correlated cases mode Correlated distance (origin = Wt) Noise limited Network Traffic limited Network Wt ↔ Vr location

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1105 October 2010 Position of the Wt (2/2) Wanted Transmitter (Wt) Victim Receiver (Vr) dRSS Victim link (0,0) (2 km,2 km) Delta X = 2 km Delta Y = 2 km x y

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1205 October 2010 Calculation of the dRSS dRSS = Pe+Ge+Gr-L dRSS = 30(dBm)+9 (dBi)+9 (dBi) (dB) dRSS = -53.5dBm L = log(8)+20log(1000)) L = dB

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1305 October 2010 Testing propagation model

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1405 October 2010 Launch simulation

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1505 October 2010 Extract dRSS

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1605 October 2010 Output display

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1705 October 2010 Step 2: My first interference probability calculation

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1805 October 2010 You will learn from Step 2 how to... Position the Vr vs It (i.e. Victim link vs Interfering link) ✓ Calculate the iRSS ✓ Calculate the probability of interference ✓ Define Interfering transmitter (It)  Tx power  Antenna Characteristics  Set the emission bandwidth ✓

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 1905 October 2010 Interfering Link

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2005 October 2010 Interfering Frequency

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2105 October 2010 Define Interfering Transmitter (It) P(dBm/Bref) = Pe (dBm)+Att(dBc/Bref) 33 (dBm/200KHz) = (dBc/Bref)

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2205 October 2010 Position of the Vr vr It (1/2) Uncorrelated cases mode None (n active interferers) It /Vr Correlated cases mode It /Wt Wt /Vr Wr/Wt Uniform density (n active interferers) Closest (single interferer) Vr ↔ It location

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2305 October 2010 Position of the Vr vr It (2/2) Victim Receiver (Vr) Wanted Receiver (Wr) Interfering Transmitter (It) Wanted Transmitter (Wt) dRSS iRSS Victim link Interfering link Delta X = 4 km Delta Y = 4 km

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2405 October 2010 Calculation of the iRSS iRSS = Pe+Ge+Gr-L iRSS = 33(dBm)+11 (dBi)+9 (dBi)-( log(32)+20log(1000)) iRSS = -54.5dBm

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2505 October 2010 Step 3: Probability of interference

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2605 October 2010 You will learn from Step 3 how to... Compatibility calculation mode ✓ Extract the Probability of Interference in.... ✓ Translation calculation mode ✓

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2705 October 2010 Probability of interference The probability of interference could be calculated by the ICE with reference to the following choice of input parameters: – Calculation mode: compatibility or translation – Which type of interference signal is considered for calculation: unwanted, blocking, intermodulation or their combination – Interference criterion: C/I, C/(N+I), (N+I)/N or I/N

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2805 October 2010 Compatibility calculation mode the C/I (i.e. dRSS/iRSS) can be derived: – dRSS/iRSS = (-54.5) = 1dB

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 2905 October 2010 Translation calculation mode

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3005 October 2010 Step 4: Where does the interference come from?

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3105 October 2010 You will learn from Step 4 how to... Calculate the iRSS unwanted ✓ Calculate the iRSS blocking  user-defined mode  Sensitivity mode  Protection ratio mode ✓ Extract probability of interference (i.e. unwanted vs blocking) ✓ Modify the Unwanted Emission Mask ✓

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3205 October 2010 Unwanted Emission mask P = 33 +(–23(dBc/Bref)) = 10 (dBm/200kHz)

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3305 October 2010 Calculate iRSS unwanted iRSS unwanted calculate the interfering power received by the Victim receiver within its bandwidth In this example there is no bandwidth correction factor to be applied to the calculation of the iRSS unwanted since the Vr bandwidth and the It reference bandwidth have the same value (i.e. 200 KHz). Unwanted: f Vr f It Interfering emission mask Rx bandwidth iRSSunwanted = P+Ge+Gr-L iRSSunwanted = 10(dBm/200kHz) ( log(32)+20log(1000)) iRSSunwanted = -77.5dBm

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3405 October 2010 Calculate iRSS blocking (1/4)

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3505 October 2010 Calculate iRSS blocking (2/4) User-defined mode: – iRSS blocking (fit) = Pe+Ge+Gr-L-Att (f it ) – iRSS blocking = 33(dBm)+11+9-( log(32)+20log(1000))- 40(dB) – iRSS blocking = -94.5dBm The It bandwidth is not considered in the iRSS blocking calculation) Blocking: f Vr Receiver Mask f It Rx bandwidth Rejection of the receiver

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3605 October 2010 Calculate iRSS blocking (3/4) Sensitivity mode: – Attenuation(f) = block(f) [dBm] – sens vr [dBm] + C/(N+I) [dB] – Sensitivity= Noise Floor + C/(N+I) – Sensitivity= -110dBm + 16 = -94dBm – Attenuation (f ) = 40-(-94)+16= 150dB – iRSS blocking (fit) = Pe+Ge+Gr-L-Att (f it ) – iRSS blocking = = dBm

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3705 October 2010 Calculate iRSS blocking (4/4) Protection Ratio: – Attenuation(f) = block(f) [dBm] + C/(N+I) [dB] + 3dB – Attenuation(f) = = 59 dB – iRSS blocking (fit) = Pe+Ge+Gr-L-Att (f it ) – iRSS blocking = = dBm

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3805 October 2010 Probability of interference (1/2) For the unwanted mode, the C/I can be derived as: – dRSS/iRSS unwanted = (-77.5) = 24dB Since the resulting C/I is above the protection criteria (19 dB), the probability of interference is 0 It is also possible to derive the (N+I)/N= (-100)= 22.5 (since I>>N). Since the (I+N)/N which is obtained is above the protection criteria (3dB), the probability of interference is 1

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 3905 October 2010 Probability of interference (2/2) For the blocking mode, the C/I can be derived as: – dRSS/iRSS blocking = (-113.5) = 60dB Since the resulting C/I is above the protection criteria (19 dB), the probability of interference is 0 It is also possible to derive the (N+I)/N= (-100)= Since the (I+N)/N which is obtained is below the protection criteria (3dB), the probability of interference is 0

SEAMCAT workshop Jean-Philippe Kermoal / ECO Page 4005 October 2010 Thank you - Any Questions?