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STEP 5: A REAL CASE

STEP 5: A REAL CASE. European Communications Office Stella Lyubchenko October 2010. dRSS Wanted Receiver. dRSS Victim Receiver. Wanted Receiver (wr). Coverage radius. iRSS. Coverage radius. Interfering Transmitter (it) (Origin of interfering coverage). Wanted

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STEP 5: A REAL CASE

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  1. STEP 5: A REAL CASE European Communications Office Stella Lyubchenko October 2010

  2. dRSS Wanted Receiver dRSS Victim Receiver Wanted Receiver (wr) Coverage radius iRSS Coverage radius Interfering Transmitter (it) (Origin of interfering coverage) Wanted Transmiter (wt) (Origin of victim coverage) Victim link Interfering link Victim Receiver (vr) (Origin of simulation) Simulation radius Illustration of coverage and simulation radiusin SEAMCAT

  3. Distance between the It and the Vr (simulation radius) • In this case Victim Link and Interfering Link operate at 1000 MHz, therefore simulation radius is define as follows:

  4. Distance between the It and the Vr (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 -59.5 dBm and -39.5 dBm

  5. Wanted Transmitter (Wt) (coverage radius) - User-defined radius; - Noise-limited network; - Trafic-limited network

  6. Wanted Transmitter (Wt) (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 = -47.5 dBm

  7. Calculation of simulation radius(Uniform density mode) Within the simulation radius following number of active transmitters can belocated uniformly: For a single It iRSS Unwanted = - 24.5 dBm For 10 active It iRSS Unwanted = - 34.5 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 = 0.178 km iRSS Unwanted = - 24.5 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. Power control • if power control is not activated then: • iRSS Unwanted= 33(dBm)+11+9-(32.5+10log(1)+20log(1000)) = -39.5dBm

  12. Power control dRSS Wanted Receiver= 33(dBm)+11+11-(32.5+10log(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 (gitPC) = 10 dB then iRSSunwanted = -39.5dBm – git PC = -49.5 dBm

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

  15. Multiple Interferers generation(Option 1)

  16. Multiple Interferers generation(Option 2)

  17. Multiple Interferers generation(Option 2) Position between Vr – It was fixed Distance between Wt and Vt = 1 km

  18. Thank you

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