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Doc.: IEEE 802.22-05-0006-00-0000 Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 1 Digital Television Tuner Design IEEE P802.22 Wireless RANs.

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Presentation on theme: "Doc.: IEEE 802.22-05-0006-00-0000 Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 1 Digital Television Tuner Design IEEE P802.22 Wireless RANs."— Presentation transcript:

1 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 1 Digital Television Tuner Design IEEE P Wireless RANs Date: Authors: 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 IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs 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 Chairhttp://standards.ieee.org/guides/bylaws/sb-bylaws.pdf Carl R. StevensonCarl 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 >

2 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 2 Abstract The design constraints and current state-of-the-art of television tuner designs are discussed. This presentation was originally given as a tutorial at the 1998 ICCE.

3 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 3 DIGITAL TELEVISION TUNER DESIGN

4 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 4 TOPICS Phase Noise Noise Figure vs. interference VSB vs. QAM Dual conversion Grand Alliance test results References

5 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 5 No problem for NTSC Critical for digital TV Device, frequency, range and PLL design PHASE NOISE

6 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 6 OSCILLATOR PHASE NOISE Flicker Corner Slope changes - 3 to -2 GAAS much higher than silicon

7 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 7 TUNER PHASE NOISE Channel 2 LO = 101 MHz

8 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 8 TUNER PHASE NOISE Channel 20 LO = 553 MHz

9 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 9 PHASE DETECTORS Phase/Frequency - logic gate circuit –Noise from gate timing –No correction for LO noise –Reliable pull-in, NTSC standard GA discriminator –LO2 for double conversion tuner –Frequency and Phase Lock Loop - Ref. 1 Fractional N –Reduces reference feed-through –More complex –Dual Modulus prescaler

10 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 10 NOISE FIGURE VS. INTERFERENCE

11 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 11 TUNER BLOCK DIAGRAM

12 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 12 RF AMPLIFIER Best noise figure peak gain and large signal capability do not occur at the same operating conditions.

13 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 13 VARACTOR Q Loss = 10 Log Q L = Loaded Q = BW/F 0 Q 0 = Unloaded Q of varactor + resonator [ ] QLQL Q0Q0 ( ) 2

14 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 14 TYPICAL VARACTOR R s = 0.5 at 8Pf At 500 MHz, Q0 = 80 Selectivity BWLoss+22 MHz+44 MHz +88 MHz 30 MHz2.0 dB4.7 dB9.4 dB14.7 dB 20 MHz3.3 dB MHz4.7 dB

15 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 15 UHF DOUBLE-TUNE FILTER

16 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 16 UHF DOUBLE-TUNE FILTER 1 dB BW = 18 MHz 3 dB BW = 25.6 MHz 1/2 IF, + 22 MHz - 15 dB LO Beat, + 44 MHz - 34 dB Image, + 88 MHz - 63 dB Loss = 6 dB

17 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 17 MIXER Double-balanced Diode +10 dBm LO Drive - 10 dBm Signal input limit 7 dB Loss IF Stage 3 dB NF

18 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 18 TUNER DESIGN F A1A1 F 1, F 2 and A are power ratios F 1 +NF = 10 Log

19 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 19 ASSUME RF gain = 10 dB RF NF = 2 dB Filter Loss= 2 dB per resonator Mixer Loss= 7 dB RF: 4 dB NF (2.51), gain 8 dB (6.31) Mix/IF: NF = = 14 dB (25.1) Sys. NF = 10 Log[ ( )/6.31)] Tuner NF = 8 dB(+ 2 dB production tol.) Adjacent channel overloads mixer at -14 dBm

20 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 20 SYSTEM NOISE FIGURE Planning Factors for Computer Analysis Single receiver Outside antenna No VCR, amplifiers or splitters

21 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 21 RECEIVER PLANNING FACTORS

22 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 22 MODERN FRINGE AREA HOME

23 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 23 Planning Factor Home

24 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 24 RESULTS OF MAST MOUNTED ANTENNA AMPLIFIERS

25 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 25 SYSTEM NOISE FIGURE

26 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 26 CO-CHANNEL vs. ADJACENT CHANNEL QAM better for adjacent channel Interference removed after demod by LPF Optional pilot tone centered on NTSC Worse for co-channel into NTSC

27 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 27 Adjacent Channel Interference

28 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 28 Co-channel Interference

29 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 29 IF SAW Filter 8 VSB similar to NTSC Lower adjacent demod into desired Need ~ 60 dB lower adjacent rejection Pilot falls on edge of NTSC SAW for better co-channel

30 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 30 TYPICAL NTSC SAW FILTER

31 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 31 DTV SAW

32 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 32 BETTER DTV SAW

33 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 33 GRAND ALLIANCE DOUBLE CONVERSION TUNER

34 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 34 CHOICE OF 1ST IF FREQUENCY Cellular Phones Cable TV assigns channels to 1 GHz Ref. EIA 542 Recommended Cable Television Identification Plan Footnotes: for 611, 919, and 955 to 967 MHz are potential problems for dual conversion

35 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 35 SELF GENERATED INTERFERENCE L01 / L02 harmonics produce beats Shielding and isolation needed Example: GA Tuner on HRC cable ch x (L01) = MHz 3 x 876 (L02) = MHz

36 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 36 DIELECTRIC FILTER PARASITIC RESONANCE

37 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 37 FILTERS RF selectivity to reduce overload Image of 2nd conversion same as SCT First IF selectivity – Low frequency side – Half IF - 22 MHz – LO Beat - 44 MHz – Image - 88 MHz Bandwidth, Loss, group delay, # of sections

38 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 38 3 SECTION DIELECTRIC FILTER -1dB = 31.2 MHz -3dB = 41.2 MHz Half IF -22 MHz = 3.8 dB LO Beat -44 MHz = 19 dB Image -88 MHz = 36 dB Insertion Loss = 2.0 dB

39 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 39 3 SECTION DIELECTRIC FILTER

40 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 40 3 SECTION DIELECTRIC FILTER -1dB = 12.4 MHz -3dB = 16.4 MHz LO Beat -44 MHz = 43 dB Image -88 MHz = 55 dB Half IF -22 MHz = 26 dB Insertion Loss = 4.0 dB

41 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 41 3 SECTION DIELECTRIC FILTER

42 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 42 GA SYSTEM TEST RESULTS Ref. 6 ATV Receiver S/N 15 dB Co-channel NTSC1.8 dB Co-channel ATV15.3 dB Lower Adj. channel NTSC- 48 dB Lower Adj. channel ATV- 42 dB Upper Adj. channel NTSC- 49 dB Upper Adj. channel ATV- 43 dB Taboo channels - exceeded test range - 15 dBm Phase Noise - 20kHz

43 doc.: IEEE Submission January, 2005 Max Muterspaugh, TTE/ThomsonSlide 43 REFERENCES 1. Citta, Richard Frequency and Phase Lock Loop, IEEE Transactions on Consumer Electronics, Vol. CE-23, August Rhea, Randall W. Oscillator Design and Computer Simulation 1995 Noble Publishing, Atlanta 3. Gardiner, F. M. Phaselock Techniques 1979 John Wiley & Sons 4. S. Perlow Noise Performance Factors in Television Tuners RCA Review vol. 37, March 1976, pp Zenith Electronics Corporation VSB Transmission System, Technical Details Dec. 17, Final Technical Report, FCC Advisory committee on Advanced Television Service, Oct. 31, FCC web site on digital television: 8. EIA/CEMA web site:


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