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Matsuzawa& Okada Lab.
ALL-STANDARD-ALL-BAND POLAR MODULATOR FOR DIGITAL
TELEVISION BROADCASTING
Martínez Alonso Abdel
Matsuzawa and Okada LaboratoriesTokyo Institute of Technology
2015/12/12
1
Matsuzawa& Okada Lab.
Outline
• Motivation• TxMER degradation• Direct Polar Modulator Design• Conclusion
2015/12/12 M.A.ABDEL 15D14048
2
Matsuzawa& Okada Lab.M.A.ABDEL 15D140482015/12/12
Frequency [GHz]0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
Terrestrial
Satellite (IF)
Cable
Worldwide Frequency Allocation
Mobile
VHF/UHF/L/S Bands
Integrated All-standard Modulator hasn’t been reported yet.
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Matsuzawa& Okada Lab.M.A.ABDEL 15D140482015/12/12
UHDTV Broadcasting Roadmap
Increasing data rates Higher order modulation schemes
2014
2016
2020
4K Test BroadcastBit Rate = 35 Mb/s
8K Test BroadcastBit Rate = 91.8 Mb/s
4K/8K Full ScaleBroadcasting(Tokyo Olympics)
8K = 16 x FHD !
*From “Promoting the Advancementof Broadcasting Services: the RoadMap to 4K and 8K”. MIC. 2014.
4
Matsuzawa& Okada Lab.
Outline
• Motivation• TxMER degradation• Direct Polar Modulator Design• Conclusion
2015/12/12 M.A.ABDEL 15D14048
5
Matsuzawa& Okada Lab.
1,E-06
1,E-05
1,E-04
1,E-03
1,E-02
1,E-01
1,E+00
0 10 20 30 40
BER
Eb/N0 [dB]
Eb/N0 = C/N * BW/Rs x m
M.A.ABDEL 15D140482015/12/12
BER over AWGN
16QAM12.2 dB
64QAM16.5 dB
256QAM21.1 dB
4096QAM31.2 dB
QPSK8.3 dB
1024QAM26.1 dB
QuasiErrorFree16KQAM
36.5 dB
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Matsuzawa& Okada Lab.M.A.ABDEL 15D140482015/12/12
Digital Television Evolution
Standard ModulationData Rate
[Mb/s]
BW [MHz]
Required C/N [dB](spec)
TxMER[dB]
(typical)DVB-S QPSK SC 45.4 36 > 8.4 > 38DVB-S2 8PSK SC 65 36 > 7.9 > 38
DVB-S2X 16APSK SC 89 36 > 12 > 42DVB-C 64QAM SC 38.1 8 > 26 > 40
DVB-C2 4096QAM OFDM 79.5 8 > 34.8 > 40
DTMB 64QAM OFDM 24.3 8 > 14.9 > 40DTMB-A 256- APSK OFDM 49.6 8 > 22.8 -
ISDBT-T/Tb 64QAM OFDM 23.2 6 > 22 > 408K Super Hi-
Vision 4096QAM OFDM 91.8 6 > 35.7* > 45*
*From “Super Hi-Vision Terrestrial Transmission Test”. NHK STRL. 2013.
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Matsuzawa& Okada Lab.M.A.ABDEL 15D140482015/12/12
TxMER degradation
Tx error sources: AWGN LO Phase Noise I/Q imbalance
LO leakage/pulling DAC error PA compression
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Matsuzawa& Okada Lab.
Direct Conversion Modulator
M.A.ABDEL 15D140482015/12/12
I/Q imbalance
LO leakage/pulling LO Phase Noise
AWGN DAC error
PA compression
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Matsuzawa& Okada Lab.
Direct Polar Modulator
M.A.ABDEL 15D140482015/12/12
DAC error becomes critical
AWGN Slow operation speed
Spurious
PA compression
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Matsuzawa& Okada Lab.
Direct Polar ModulatorAdvantages:
M.A.ABDEL 15D140482015/12/12
• No I/Q mismatch• Low Phase Noise• Low LO leakage/pulling• Supports effortless digital modulation• Better scaling with CMOS technology
• 50 MHz - 2660 MHz band operation• DAC errors becomes critical• Spurious performance
Challenges:
TxMER
TxMER
11
Matsuzawa& Okada Lab.
Outline
• Motivation• TxMER degradation• Direct Polar Modulator Design• Conclusion
2015/12/12 M.A.ABDEL 15D14048
12
Matsuzawa& Okada Lab.
Direct Polar Modulator
M.A.ABDEL 15D140482015/12/12
RF-DDFS Design:
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Matsuzawa& Okada Lab.M.A.ABDEL 15D140482015/12/12
Classic Digital Mapping DDFS:
DDFSout = A*sin(ωt + ϴ) [2]
RF-DDFS Design
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Matsuzawa& Okada Lab.
RF-DDFS Design
2015/12/12 M.A.ABDEL 15D14048
T = 24 bits
P = 14 bits
A = 10 bits
Proposed Complementary Dual PhaseLatch-Based (CDPL) DDFS:
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Matsuzawa& Okada Lab.
RF-DDFS Design
2015/12/12 M.A.ABDEL 15D14048
Phase Accumulator (PA 2 bits) :
p1 p2 p3 p1 p2 p3
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Matsuzawa& Okada Lab.2015/12/12
Floorplan view (CMOS 65nm)460 µm
230 µm
PAPAC
Control
SPI
M.A.ABDEL 15D14048
57.2 µm
138 µm
224 µm
382.6 µm
RF-DDFS Design
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Matsuzawa& Okada Lab.2015/12/12 M.A.ABDEL 15D14048
RF-DDFS Design
Reference Arch. T P A TechnologySampling
Rate (GS/s)
Area(mm2)
Power (mW)
FFDDFS
Digital Mapping 24 14 10
CMOS65 nm 3.9 0.114 238
CDPLDDFS
Digital Mapping 24 14 10 CMOS
65 nm 6.8 0.105 145
Performance Comparison:
CDPL-DDFS can achieve a highersampling rate and lower powerconsumption when compared with a Flip-Flop approach.
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Matsuzawa& Okada Lab.2015/12/12
RF-DDFS Design
JSSC
APCCAS
VLSIC
ISSCC
This Work
0,00
2,00
4,00
6,00
8,00
2002 2004 2006 2008 2010 2012 2014 2016
Mas
ter C
lock
(GH
z)
Year
Maximum Frequency (CMOS)
0.25 µm CMOS 0.35 µm CMOS 0.13 µm CMOS0.18 µm CMOS 0.09 µm CMOS 0.055 µm CMOS
M.A.ABDEL 15D14048
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Matsuzawa& Okada Lab.2015/12/12
RF-DDFS Design
Reference Arch. T (PA bits)
A (DAC bits)
CMOS Technology
SamplingRate
(GS/s)
Area(mm2)
PE (W/GS/s)
SFDR(dBc)
JSSC’04 Digital Mapping 32 9 0.35 µm 0.8 1.47 0.217 55
*APCCAS’08
Nonlinear DAC 12 7 90 nm 4 N/A 0.1155 44
VLSIC’09 Nonlinear DAC 24 11 90 nm 1.3 2 0.26 52
*TCSI’11 (Without
DAC)
Digital Mapping 24 9 0.13 µm 1.4 0.006 0.005 62
ISSCC’14 Nonlinear DAC 32 9 55 nm 2 0.1 0.065 55.1
This Work (Without
DAC)
Digital Mapping 24 10 65 nm 6.8 0.1 0.022 45.3
M.A.ABDEL 15D14048
Performance Comparison:
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Matsuzawa& Okada Lab.
Direct Polar Modulator
M.A.ABDEL 15D140482015/12/12
RF-DAC Design:
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Matsuzawa& Okada Lab.
RF-DAC Design
2015/12/12 M.A.ABDEL 15D14048
Interleaved DAC architecture:
DAC-A
DAC-B
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Matsuzawa& Okada Lab.
Outline
• Motivation• TxMER degradation• Direct Polar Modulator Design• Conclusion
2015/12/12 M.A.ABDEL 15D14048
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Matsuzawa& Okada Lab.
Conclusions
1. 4K and 8K ultra-high-definition videotechnology is already making inroadsinto broadcasting.
2. Integrated All-Standard-All-BandModulator is proposed:• High TxMER Direct Polar Modulator
(TxMER > 45 dB).• Complementary Dual-Phase Latch-
Based DDFS (Fout = 2.7 GHz).• Interleaving RF-DAC. (Fout = 2.7 GHz).
2015/12/12 M.A.ABDEL 15D14048
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Matsuzawa& Okada Lab.
References
2015/12/12 M.A.ABDEL 15D14048
[1] D. ANALOG. “3.5 GSPS Direct Digital Synthesizer with 12-Bit DAC”, 2014. [2] G. Ken. “DDS simplifies polar modulation”, EDN Network, 2004. [3] D. ANALOG. “A Technical Tutorial on Digital Signal Synthesis”. Web site:
http://www.analog.com, 1999. [4] M. Shin, et al., “The feasibility Study on the 4K-UHD Satellite Broadcasting Service
in Ka-Band”, ICCE, 2013. [5] European Telecommunications Standards Institute. EN 302 755 V1.3.1, 2012.[6] Digital Broadcasting Experts Group. ABNT NBR 15601, 2009. [7] Advanced Television Systems Committee. ATSC Digital Television Standard, 2007.
Matsuzawa& Okada Lab.
ALL-STANDARD-ALL-BAND POLAR MODULATOR FOR DIGITAL
TELEVISION BROADCASTING
Martínez Alonso Abdel
Matsuzawa and Okada LaboratoriesTokyo Institute of Technology
2015/12/12
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