Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems

The document discusses bandwidth and packet type detection schemes for 40-50GHz millimeter wave communication systems in IEEE 802.11aj specifications. It proposes a preamble design for auto-detection of bandwidth and packet type to improve channel estimation and decoding efficiency. By utilizing different polarizations of ZCZ 256 sequences in the preamble, the receiver can automatically detect packet types and bandwidth, enhancing the overall performance of the system.

• Millimeter Wave
• Communication Systems
• Bandwidth Detection
• Packet Type
• IEEE 802.11

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1. May 2015 doc.: IEEE 802.11-15/0706r2 Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: Name Affiliations Address Phone email Frank Hsu frank.hsu@mediatek.com No. 1, Dusing 1st Road, Hsinchu, 300 Taiwan MediaTek Inc. +886-3-567-0766 James Yee james.yee@mediatek.com 2860 Junction Ave., San Jose, CA 95134 USA Jianhan Liu MediaTek USA +1-408-526-1899 jianhan.liu@mediatek.com Submission Slide 1 Frank Hsu (MediaTek)

2. May 2015 doc.: IEEE 802.11-15/0706r2 Introduction In IEEE 802.11aj specifications, there are three PHY types, control PHY, single carrier PHY, and OFDM PHY Also, transmission bandwidth can be in 540MHz channel or in 1080MHz channel This proposal proposes a preamble design for auto-detection of bandwidth and packet type Submission Slide 2 Frank Hsu (MediaTek)

3. May 2015 doc.: IEEE 802.11-15/0706r2 Motivations In 45 GHz systems, there are multiple transmission schemes with three different packet formats and two kinds of bandwidth Why bandwidth auto-detection in preamble? RX can perform channel estimation on only the occupied bandwidth other than the maximum transmission bandwidth Also, especially for single carrier packets, since there are no other training fields allowing RX to update channel estimation for different bandwidth Why packet format auto-detection in preamble? With packet type knowledge before channel estimation and PHY header decoding, RX does NOT have to perform parallel decoding for multiple possible packet formats Submission Slide 3 Frank Hsu (MediaTek)

4. May 2015 doc.: IEEE 802.11-15/0706r2 Preamble Design (1/3) There are five possible transmission schemes, including Control PHY transmission only uses 540 MHz primary channel for simple interoperability. SC and OFDM both can use 540 MHz or 1080 MHz We propose to utilize different polarizations of ZCZ 256 (Z256) sequences in preamble, RX can do auto- detection of packet types and bandwidth Submission Slide 4 Frank Hsu (MediaTek)

5. May 2015 doc.: IEEE 802.11-15/0706r2 Preamble Design (2/3) Signature symbol sets the boundary for starting BW and packet type detection At lest two repetitions in CEF for better channel estimation Submission Slide 5 Frank Hsu (MediaTek)

6. May 2015 doc.: IEEE 802.11-15/0706r2 Preamble Design (3/3) The following sign patterns from CE symbols are used for bandwidth and packet type detection The first sign pattern indicates the BW The second and third signs indicate the packet type Pattern Channel BW Packet Type - - + 540 MHz Control PHY - + - 540 MHz SC PHY - + + 540 MHz OFDM PHY + - + 1080 MHZ SC PHY + + + 1080 MHz OFDM PHY Submission Slide 6 Frank Hsu (MediaTek)

7. May 2015 doc.: IEEE 802.11-15/0706r2 Simulations Correct detection includes Signature symbol detection Bandwidth detection Packet format detection Simulation setup PHY type: Control PHY, SC 540MHz, OFDM 540MHz, SC 1080MHz, OFDM 1080MHz Channel: AWGN CFO: 0 ppm, +/- 5 ppm, +/- 10 ppm Submission Slide 7 Frank Hsu (MediaTek)

8. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results (1/5) Detection error rate: AWGN & CFO 0 ppm Packet format and Bandwidth detection AWGN CFO 0 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -10.4 -10.5 -10.3 -10.5 -10.4 10-3 Ctrl -3 10 SC540 OFDM540 -4 10 -14 -13.5 -13 -12.5 -12 -11.5 SNR (dB) -11 -10.5 -10 -9.5 -9 SC1080 OFDM1080 Submission Slide 8 Frank Hsu (MediaTek)

9. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results (2/5) Detection error rate: AWGN & CFO 5 ppm Packet format and Bandwidth detection AWGN CFO 5 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -9.8 -9.6 -9.7 -9.7 -9.7 10-3 10-3 -3 Ctrl 10 SC540 OFDM540 -4 10 -14 -13.5 -13 -12.5 -12 -11.5 SNR (dB) -11 -10.5 -10 -9.5 -9 SC1080 OFDM1080 Submission Slide 9 Frank Hsu (MediaTek)

10. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results (3/5) Detection error rate: AWGN & CFO -5 ppm Packet format and Bandwidth detection AWGN CFO -5 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -9.6 -9.6 -9.5 -9.5 -9.8 10-3 10-3 -3 Ctrl 10 SC540 OFDM540 -4 10 -14 -13.5 -13 -12.5 -12 -11.5 SNR (dB) -11 -10.5 -10 -9.5 -9 SC1080 OFDM1080 Submission Slide 10 Frank Hsu (MediaTek)

11. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results (4/5) Detection error rate: AWGN & CFO 10 ppm Packet format and Bandwidth detection AWGN CFO 10 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -9.3 -9.3 -9.3 -9.4 -9.2 10-3 10-3 -3 Ctrl 10 SC540 OFDM540 -4 10 -14 -13.5 -13 -12.5 -12 -11.5 SNR (dB) -11 -10.5 -10 -9.5 -9 SC1080 OFDM1080 Submission Slide 11 Frank Hsu (MediaTek)

12. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results (5/5) Detection error rate: AWGN & CFO -10 ppm Packet format and Bandwidth detection AWGN CFO -10 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -9.3 -9.3 -9.4 -9.2 -9.3 10-3 10-3 -3 Ctrl 10 SC540 OFDM540 -4 10 -14 -13.5 -13 -12.5 -12 -11.5 SNR (dB) -11 -10.5 -10 -9.5 -9 SC1080 OFDM1080 Submission Slide 12 Frank Hsu (MediaTek)

13. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Performance Summary Detection SNR @ 10-3 error rate 0 ppm 5 ppm -10.4 -9.8 -10.5 -9.6 -10.3 -9.7 -10.5 -9.7 -9.7 -5 ppm -9.6 -9.6 -9.5 -9.5 -9.8 10 ppm -9.3 -9.3 -9.3 -9.4 -9.2 -10 ppm -9.3 -9.3 -9.4 -9.2 -9.3 Ctrl SC540 OFDM540 SC1080 OFDM1080 -10.4 Comments In general, when doing signature symbol detection, CFO has been compensated within 10 ppm or less 10 ppm CFO only introduces up to 1.3 dB loss The detection capability is around -9 dB and fits for current 11aj 45 GHz specs. Submission Slide 13 Frank Hsu (MediaTek)

14. May 2015 doc.: IEEE 802.11-15/0706r2 Summary A preamble design is proposed for packet type and bandwidth auto-detection Simulations show that detection performance fits current 11aj specification requirements Submission Slide 14 Frank Hsu (MediaTek)

15. May 2015 doc.: IEEE 802.11-15/0706r2 References [1] 11-14-1363-00-00aj-preamble-sequence-for-802-11aj-45ghz [2] 11-14-0807-01-00aj-ldpc-coding-for-45ghz [3] 11-15-0707-00-00aj-complete-proposal-for-IEEE-802.11aj (45 GHz) Submission Slide 15 Frank Hsu (MediaTek)

16. doc.: IEEE 802.11-15/0706r2 May 2015 BACKUP Submission Frank Hsu (MediaTek) Slide 16

17. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results Detection error rate: AWGN & CFO 20 ppm Packet format and Bandwidth detection AWGN CFO 20 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -7.8 -7.6 -7.7 -7.7 -7.7 10-3 10-3 -3 Ctrl 10 SC540 OFDM540 -4 10 -14 -13 -12 -11 -10 -9 -8 -7 SNR (dB) SC1080 OFDM1080 Submission Slide 17 Frank Hsu (MediaTek)

18. May 2015 doc.: IEEE 802.11-15/0706r2 AWGN Simulation Results Detection error rate: AWGN & CFO -20 ppm Packet format and Bandwidth detection AWGN CFO -20 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE -2 10 PHY Type SNR (dB) -7.9 -7.7 -7.9 -7.7 -7.8 10-3 10-3 -3 Ctrl 10 SC540 OFDM540 -4 10 -14 -13 -12 -11 -10 -9 -8 -7 SNR (dB) SC1080 OFDM1080 Submission Slide 18 Frank Hsu (MediaTek)

19. May 2015 doc.: IEEE 802.11-15/0706r2 Exp 4ns Simulation Results Detection error rate: Exp 4ns & CFO 0 ppm Packet format and Bandwidth detection Exp 4ns CFO 0 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE PHY Type SNR (dB) -10.7 -10.4 -10.5 -10.6 -10.7 -2 Ctrl 10-2 10 SC540 OFDM540 -3 SC1080 10 -14 -13.5 -13 -12.5 -12 -11.5 SNR (dB) -11 -10.5 -10 -9.5 -9 OFDM1080 Submission Slide 19 Frank Hsu (MediaTek)

20. May 2015 doc.: IEEE 802.11-15/0706r2 Exp 10ns Simulation Results Detection error rate: Exp 10ns & CFO 0 ppm Packet format and Bandwidth detection Exp 10ns CFO 0 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE PHY Type SNR (dB) -9.4 -9.7 -9.7 -9.4 -9.4 10-2 -2 10 Ctrl SC540 OFDM540 -3 10 -14 -13 -12 -11 -10 -9 -8 -7 SC1080 SNR (dB) OFDM1080 Submission Slide 20 Frank Hsu (MediaTek)

21. May 2015 doc.: IEEE 802.11-15/0706r2 Exp 20ns Simulation Results Detection error rate: Exp 20ns & CFO 0 ppm Packet format and Bandwidth detection Exp 20ns CFO 0 ppm 0 10 Ctrl PHY SC PHY 540MHz OFDM PHY 540MHz SC PHY 1080MHz OFDM PHY 1080MHz -1 10 ERROR RATE PHY Type SNR (dB) -8.2 -8.3 -8.2 -7.9 -8.5 Ctrl 10-2 -2 10 SC540 OFDM540 -3 10 SC1080 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 SNR (dB) OFDM1080 Submission Slide 21 Frank Hsu (MediaTek)

22. doc.: IEEE 802.11-15/0706r2 May 2015 CE Schemes Five CE schemes Colored Z256s are taken to estimate the channel Scheme CEF Sign Sequence + + - + + + + + + + 1 2 3 4 5 Submission Frank Hsu (MediaTek) Slide 22

23. doc.: IEEE 802.11-15/0706r2 May 2015 Simulation Setup Packet Type/BW: SC 540 MHz Packet Size: 1050 bytes MCS: BPSK and LDPC 1/2 Channel: AWGN, Exp 4ns, Exp 10ns 5 CE schemes Submission Frank Hsu (MediaTek) Slide 23

24. doc.: IEEE 802.11-15/0706r2 May 2015 AWGN 0 10 AWGN Scheme1 AWGN Scheme2 AWGN Scheme3 AWGN Scheme4 AWGN Scheme5 -1 10 PER Scheme SNR @10-1 PER 1 1.29 2 1.29 3 1.29 4 1.28 5 1.28 -2 10 -3 10 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 SNR (dB) Submission Frank Hsu (MediaTek) Slide 24

25. doc.: IEEE 802.11-15/0706r2 May 2015 Exp 4ns 0 10 Exp 4ns Scheme1 Exp 4ns Scheme2 Exp 4ns Scheme3 Exp 4ns Scheme4 Exp 4ns Scheme5 -1 10 PER Scheme SNR @10-1 PER 1 3.13 2 3.09 3 3.07 4 3.07 5 3.05 -2 10 -3 10 2 2.5 3 3.5 4 4.5 5 SNR (dB) Submission Slide 25

26. doc.: IEEE 802.11-15/0706r2 May 2015 Exp 10ns 0 10 Exp 10ns Scheme1 Exp 10ns Scheme2 Exp 10ns Scheme3 Exp 10ns Scheme4 Exp 10ns Scheme5 -1 10 PER Scheme SNR @10-1 PER 1 3.73 2 3.45 3 3.41 4 3.47 5 3.42 -2 10 -3 10 3 3.5 4 4.5 5 5.5 SNR (dB) Submission Frank Hsu (MediaTek) Slide 26

27. doc.: IEEE 802.11-15/0706r2 May 2015 Comments For short delay spread channels, AWGN And Exp 4ns, CE of all schemes has enough accuracy (required SNRs are within 0.1 dB difference) For long delay spread channels, schemes 2 and scheme 3 CE provides enough accuracy, and adding more Z256 sequences provides little performance gain Sign inversion of Z256 sequences does NOT cause any significant performance loss Submission Frank Hsu (MediaTek) Slide 27