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Setting Emission and Blocking masks European Communications Office Jean-Philippe Kermoal (ECO) June 2012 EUROPEAN COMMUNICATIONS OFFICE Nansensgade 19.

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Presentation on theme: "Setting Emission and Blocking masks European Communications Office Jean-Philippe Kermoal (ECO) June 2012 EUROPEAN COMMUNICATIONS OFFICE Nansensgade 19."— Presentation transcript:

1 Setting Emission and Blocking masks European Communications Office Jean-Philippe Kermoal (ECO) June 2012 EUROPEAN COMMUNICATIONS OFFICE Nansensgade 19 DK-1366 Copenhagen Denmark Telephone: + 45 33 89 63 00 Telefax: + 45 33 89 63 30 E-mail: eco@eco.cept.org Web Site: http://www.cept.org/ecohttp://www.cept.org/eco

2 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 205 June 2012 Outline

3 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 305 June 2012 Using Library Edit Import from library Export to library Edit Import Export Technical specifications commonly extracted from ETSI (see http://www.etsi.org/WebSite/Standards/Standard.aspx) http://www.etsi.org/WebSite/Standards/Standard.aspx

4 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 405 June 2012 Editing the mask The emission mask defaults value Remove the default using the Clear button. Then use the add button to add the enough blank rows for half of the emission mask. Note the format of the data: – Offset = MHz – Unwanted = dBc – Reference bandwidth = kHz

5 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 505 June 2012 Symmetry Then use the Sym button to get a symetric mask

6 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 605 June 2012 Reference/normalised bandwidth Once SEAMCAT has generated the whole mask, first check that the values are in the correct order. The unwanted emission diagram shows two masks The red mask is the representation using the user defined reference bandwidth. The blue mask is normalised to 1MHz measurement bandwidth. The user may normalise his input to 1MHz bandwidth but it can be useful to input the mask in the bandwidth defined in the standard and allow SEAMCAT to create normalised mask.

7 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 705 June 2012 Store your mask on disk Spectrum mask can be saved as.txt file it can be reused for other workspaces using load buttons.

8 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 805 June 2012 General Ref. BW 10 KHz Emission BW = Ref. BW = 20 KHz System with 30 dBm in a emission bandwidth of 20 KHz

9 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 905 June 2012 CDMA FDD emission mask - BS example Spectrum emission mask values, BS maximum output power P  43 dBm (TS25.104) 3GPP TS25.104

10 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1005 June 2012 CDMA FDD emission mask - UE example 3GPP TS25.101

11 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1105 June 2012 Exercise #1 – edit a Mask Assuming a BS Tx power of 43 dBm, and with addition of the ITU-R SM.329 limit above 12.5 MHz, perform the following: 1.Convert the dBm values into dBc 2.Insert the spectrum mask in SEAMCAT 3.Save it as.txt file 4.Export it as your own spectrum library 43- (-14) = 57 dBc linear 43- (-26) = 69 dBc 43- (-13) = 56 dBc 43- (-36) = 79 dBc

12 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1205 June 2012 ACIR = f(ACLR, ACS) ACIR = adjacent-channel interference ratio In UL, the dominant part of ACIR is due to the UE adjacent channel leakage (ACLR) i.e. ACS BS is very large compare to ACLR UE and ACIR ≈ ACLR UE. In DL, the dominant part of ACIR is due to the UE frequency selectivity (ACS) i.e. ACLR BS is very large compare to ACS UE and ACIR ≈ ACS UE

13 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1305 June 2012 ACLR in SEAMCAT No use of the ACLR directly. Emission spectrum Mask is used

14 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1405 June 2012 Blocking Mask (generic) User-defined mode Protection ratio Sensitivity modes fvfv Receiver Mask fIfI Rx bandwidth Rejection of the receiver ACS (ETSI) Blocking (ETSI) + Blocking: Blocking Response = (PR and Sensitivity mode) fvfv Receiver Mask fIfI Rx bandwidth Rejection of the receiver Blocking Response = filtering (user defined mode) Blocking:

15 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1505 June 2012 CDMA and OFDMA ACS ACS is the same as the blocking attenuation input

16 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1605 June 2012 BS blocking Mask example

17 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1705 June 2012 Emission Floor This emission floor mask (frequency offset (MHz), emission floor (dBm), reference bandwidth (MHz)). Useful when power control is used

18 SEAMCAT Workshop Jean-Philippe Kermoal / ECO Page 1805 June 2012 Thank you - Any Questions?

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