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Doc.: IEEE 802.22-06/0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 1 WRAN CPE and DTV Receiver Coupling (Alternate channel interference consideration)

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Presentation on theme: "Doc.: IEEE 802.22-06/0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 1 WRAN CPE and DTV Receiver Coupling (Alternate channel interference consideration)"— Presentation transcript:

1 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 1 WRAN CPE and DTV Receiver Coupling (Alternate channel interference consideration) Author: Notice: This document has been prepared to assist IEEE It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair Carl R. Stevenson as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http://standards.ieee.org/guides/bylaws/sb-bylaws.pdfCarl R. Abstract This contribution presents the results of calculations establishing the coupling/isolation between an WRAN Consumer Premise Equipment (CPE) terminal and a nearby DTV receiving installation. The DTV receiving characteristics are based on the FCC-OET Bulletin 69 which gives the basis for planning DTV broadcasting in the US. The amount of coupling/isolation between the two terminals is found from a detailed calculation of the horizontal and vertical patterns of the two antennas which are then applied to the detailed calculation of the on-axis and off-axis co-polar and cross-polar coupling.

2 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 2 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

3 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 3 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

4 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 4 DTV Planning Factors ( FCC OET Bulletin 69)

5 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 5 DTV reception parameters Noise limited contour 41 dB(uV/m) Field strength at noise limited contour: Field = *log(615/F) (dBμV/m) where F is the frequency of the TV channel in MHz Omni antenna aperture = λ 2 /4π (m 2 ) = (300/F) 2 /4π (m 2 ) A ap = 10*log((300/F) 2 /4π) (dBm 2 ) Antenna gain = ( ) dBi Downlead loss = 4 dB Power at the input of the DTV receiver: P input = Field A ap (dBW) = dBm

6 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 6 DTV UHF Receiving Antenna Winegard P4400 EZNEC Model 3D Antenna Pattern Frequency: 617 MHz On-axis gain = = dBi

7 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 7 DTV UHF Receiving Antenna Winegard P4400 Frequency: 617 MHz

8 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 8 DTV UHF Receiving Antenna Winegard P4400 Maximum co-polar gain: dBi Maximum cross-polar gain: dBi Frequency: 617 MHz

9 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 9 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

10 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 10 Critical interference case Noise limited contour 41 dB(uV/m)

11 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 11 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

12 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 12 Coupling between WRAN CPE and DTV receiver On-axis maximum coupling Level of RF power generated at the input of the DTV receiver by a 4 Watt EIRP WRAN CPE located at 10 m horizontal distance: Power RX = 6 dBW - 10*log(4*π*10 2 ) + 10*log(λ 2 /4*π) +(G RX -Mismatch RX )-Loss Downlead Power RX = *log(4*π*10 2 ) + 10*log(λ 2 /4*π) Power RX = log(615/F) dBm

13 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 13 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

14 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 14 Coupling between WRAN CPE and DTV receiver Off-axis coupling 10 m WRAN Transmit Antenna DTV Receive Antenna Elevation RX azimuth TX azimuth Sweeping is done in azimuth and elevation

15 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 15 Coupling between WRAN CPE and DTV receiver Off-axis coupling Co-polar coupling: Power RX co = 10*log(10 (GtxH+GrxH) +10 (GtxV+GrxV) ) + F Cross-polar coupling: Power RX cross = 10*log(10 (GtxH+GrxV) +10 (GtxV+GrxH) ) + F Where F is the normalization factor to produce the maximum on- axis coupling when the two antennas are aligned: F= PowerRX - GtxH-GrxH

16 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 16 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

17 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 17 Co-polar coupling between two UHF Antennas (W4400=>W4400) Elevation angle: 15 ° Transmit antenna azimuth sweep -180°+180° Receive antenna azimuth sweep -180° +180° 0°0° 0°0° Maxima

18 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 18 Transmit antenna azimuth sweep -180° +180° Receive antenna azimuth sweep -180° +180° 0°0° 0°0° Maxima Elevation angle: 15 ° Cross-polar coupling between two UHF Antennas (W4400=>W4400)

19 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 19 Frequency: 617 MHz Coupling between WRAN CPE and DTV receiver (W4400=>W4400)

20 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 20 Maximum co-polar coupling: -3.9 dBm Maximum cross-polar coupling: dBm Frequency: 617 MHz Coupling between WRAN CPE and DTV receiver (W4400=>W4400)

21 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 21 Coupling between WRAN CPE and DTV receiver (W4400=>W4400)

22 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 22 Coupling between WRAN CPE and DTV receiver (W4400=>W4400) Frequency: 473 MHz Frequency: 695 MHz Frequency: 617 MHz Percentage of both antennas orientations for which the coupling value is exceeded

23 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 23 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

24 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide m WRAN Transmit Antenna DTV Receive Antenna Elevation RX azimuth TX azimuth Coupling between WRAN CPE and DTV receiver Off-axis coupling Sweeping is done in azimuth and elevation CM3018 W4400

25 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 25 Coupling between WRAN CPE and DTV receiver (W4400=>CM3018)

26 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 26 Coupling between WRAN CPE and DTV receiver (W4400=>CM3018) Frequency: 695 MHz Frequency: 617 MHz Frequency: 473 MHz Percentage of both antennas orientations for which the coupling value is exceeded

27 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 27 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

28 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide m WRAN Transmit Antenna DTV Receive Antenna Elevation RX azimuth TX azimuth Coupling between WRAN CPE and DTV receiver Off-axis coupling Sweeping is done in azimuth and elevation CM4248 W4400

29 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 29 Coupling between WRAN CPE and DTV receiver (W4400=>CM4248)

30 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 30 Coupling between WRAN CPE and DTV receiver (W4400=>CM4248) Frequency: 695 MHz Frequency: 617 MHz Frequency: 473 MHz Percentage of both antennas orientations for which the coupling value is exceeded

31 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 31 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

32 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide m WRAN Transmit Antenna DTV Receive Antenna Elevation RX azimuth TX azimuth Coupling between WRAN CPE and DTV receiver Off-axis coupling Sweeping is done in azimuth and elevation Silver Sensor W4400

33 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 33 Coupling between WRAN CPE and DTV receiver (W4400=>Silver Sensor)

34 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 34 Coupling between WRAN CPE and DTV receiver (W4400=>Silver Sensor) Frequency: 695 MHz Frequency: 617 MHz Frequency: 473 MHz Percentage of both antennas orientations for which the coupling value is exceeded

35 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 35 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

36 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide m WRAN Transmit Antenna DTV Receive Antenna Elevation RX azimuth TX azimuth Coupling between WRAN CPE and DTV receiver Off-axis coupling Sweeping is done in azimuth and elevation W4400 Square Shooter

37 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 37 Coupling between WRAN CPE and DTV receiver (W4400=>Square Shooter)

38 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 38 Coupling between WRAN CPE and DTV receiver (W4400=>Square Shooter) Frequency: 695 MHz Frequency: 617 MHz Frequency: 473 MHz Percentage of both antennas orientations for which the coupling value is exceeded

39 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 39 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

40 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide m WRAN Transmit Antenna DTV Receive Antenna Elevation RX azimuth TX azimuth Coupling between WRAN CPE and DTV receiver Off-axis coupling Sweeping is done in azimuth and elevation W4400 UHF Loop

41 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 41 Coupling between WRAN CPE and DTV receiver (W4400=>UHF Loop)

42 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 42 Coupling between WRAN CPE and DTV receiver (W4400=>UHF Loop) Frequency: 695 MHz Frequency: 617 MHz Frequency: 473 MHz Percentage of both antennas orientations for which the coupling value is exceeded

43 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 43 Coupling between WRAN CPE and DTV receiver Summary

44 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 44 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

45 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 45 Impact of polarization tilt angle on coupling 10 m WRAN Transmit Antenna DTV Receive Antenna Receiving antenna tilt CM3018 W4400

46 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 46 Coupling between Winegard P4400 and the CM3018 Impact of the tilt angle Frequency: 473 MHz Impact of polarization tilt angle on receive antenna pattern (CM3018)

47 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 47 Frequency: 473 MHz Coupling between WRAN CPE and DTV receiver (W4400=>CM3018) Impact of polarization tilt angle

48 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 48 Frequency: 617 MHz Impact of polarization tilt angle on receive antenna pattern (CM3018)

49 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 49 Frequency: 617 MHz Coupling between WRAN CPE and DTV receiver (W4400=>CM3018) Impact of polarization tilt angle

50 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 50 Frequency: 695 MHz Impact of polarization tilt angle on receive antenna pattern (CM3018)

51 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 51 Frequency: 695 MHz Coupling between WRAN CPE and DTV receiver (W4400=>CM3018) Impact of polarization tilt angle

52 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 52 Impact of polarization tilt angle on receive Summary

53 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 53 Outline DTV receiving installation reference model Coupling between WRAN transmission and DTV reception –On-axis maximum coupling –Off-axis co- and cross-polar coupling W4400 => W4400 W4400 => CM3018 W4400 => CM4248 W4400 => Silver Sensor W4400 => Square Shooter W4400=> UHF Loop Impact of receive antenna polarization tilt angle W CM3018 Conclusions

54 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 54 Conclusions The DTV receiving installation model for edge of contour reception, as defined by the FCC OET, is used to explore the worst case scenario for interference from a nearby WRAN CPE. For the case of alternate channel use, the WRAN CPE antenna is assumed to be located at 10 m horizontally from the closest DTV receiving antenna. Coupling between a 4 W EIRP CPE and a DTV receiving installation is calculated for all combinations of antenna orientations using the 3D transmit and receive antenna patterns when the two antennas are both horizontal (co-polar case) and when the transmit antenna is turned vertically (cross-polar case). It was found that the maximum coupling between the two antennas results in a power level at the input of the DTV receiver in the range of -2 to -10 dBm depending on the gain of the receiving antenna. When the transmit antenna is turned vertically, the cross-polar coupling between the two antennas results in a power level at the input of the DTV receiver of -26 dBm to -32 dBm exceeded for 1% of the antenna orientation combinations except for the SquareShooter at the lower and upper edges of the frequency range due to its circular polarization design. The tolerance for the receive antenna polarization tilt angle can be +/-10 deg. before the coupling between the two antennas starts to increase significantly. Tighter tolerance would result in better on-axis cross-polar discrimination but this is masked by the poor antenna polarization purity in off-axis directions.

55 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 55 Conclusions (Cont’d) If -26 dBm is used as the reference level for the signal coupling from a 4 Watt WRAN CPE into a DTV receiver, this mean that the alternate channel interference from the nearby CPE can be kept 18 dB below the -8 dBm accepted saturation level of the DTV receivers. Since the alternate channel signal level reaching the DTV receiver is -26 dBm and that a 1 dB desensitization is the limit for out-of-band emission from the CPE, the relative out-of-band rejection at the output of the CPE can be calculated as follows: –Acceptable out-of-band energy at the input of the DTV receiver: P OBO = dBm dB dB = -105 dBm –Relative out-of-band rejection at the output of the WRAN CPE: Rejection = -26 dBm dBm = 79 dB The -26 dBm DTV receiver input power which corresponds to 4 Watt EIRP should be used as the reference level to calculate the EIRP profile for closer-in channels and image frequency interference once the required D/U ratios are known.

56 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 56 DTV antenna models with EZNEC files

57 doc.: IEEE /0232r1 Submission November 2007 Gerald Chouinard, CRCSlide 57 References FCC OET BULLETIN No. 69, "Longley-Rice Methodology for Evaluating TV Coverage and Interference", Federal Communications Commission, Office of Engineering and Technology, Washington, D. C., February 06, zz _WRAN_CPE_TX_and_DTV_RX_antennas coupling.xls zz _Impact_of_DTV_receive_antenna_tilt_on_WRAN- DTV_coupling.xls _WRAN_Reference_Model.xls


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