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Doc.: IEEE 802.11-15/0706r2 Submission Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: May 2015.

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Presentation on theme: "Doc.: IEEE 802.11-15/0706r2 Submission Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: May 2015."— Presentation transcript:

1 doc.: IEEE 802.11-15/0706r2 Submission Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: May 2015 Slide 1Frank Hsu (MediaTek)

2 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 2Frank Hsu (MediaTek)

3 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 3Frank Hsu (MediaTek)

4 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 4Frank Hsu (MediaTek)

5 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 5Frank Hsu (MediaTek)

6 doc.: IEEE 802.11-15/0706r2 Submission 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 PatternChannel BWPacket Type - - +540 MHzControl PHY - + -540 MHzSC PHY - + +540 MHzOFDM PHY + - +1080 MHZSC PHY + + +1080 MHzOFDM PHY May 2015 Slide 6Frank Hsu (MediaTek)

7 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 7Frank Hsu (MediaTek)

8 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results (1/5) Detection error rate: AWGN & CFO 0 ppm PHY Type SNR (dB) Ctrl -10.4 SC540 -10.5 OFDM540 -10.3 SC1080 -10.5 OFDM1080 -10.4 10 -3 May 2015 Slide 8Frank Hsu (MediaTek)

9 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results (2/5) Detection error rate: AWGN & CFO 5 ppm 10 -3 PHY Type SNR (dB) Ctrl -9.8 SC540 -9.6 OFDM540 -9.7 SC1080 -9.7 OFDM1080 -9.7 10 -3 May 2015 Slide 9Frank Hsu (MediaTek)

10 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results (3/5) Detection error rate: AWGN & CFO -5 ppm 10 -3 PHY Type SNR (dB) Ctrl -9.6 SC540 -9.6 OFDM540 -9.5 SC1080 -9.5 OFDM1080 -9.8 10 -3 May 2015 Slide 10Frank Hsu (MediaTek)

11 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results (4/5) Detection error rate: AWGN & CFO 10 ppm 10 -3 PHY Type SNR (dB) Ctrl -9.3 SC540 -9.3 OFDM540 -9.3 SC1080 -9.4 OFDM1080 -9.2 10 -3 May 2015 Slide 11Frank Hsu (MediaTek)

12 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results (5/5) Detection error rate: AWGN & CFO -10 ppm 10 -3 PHY Type SNR (dB) Ctrl -9.3 SC540 -9.3 OFDM540 -9.4 SC1080 -9.2 OFDM1080 -9.3 10 -3 May 2015 Slide 12Frank Hsu (MediaTek)

13 doc.: IEEE 802.11-15/0706r2 Submission AWGN Performance Summary Detection SNR @ 10 -3 error rate 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. 0 ppm5 ppm-5 ppm10 ppm-10 ppm Ctrl -10.4-9.8-9.6-9.3 SC540 -10.5-9.6 -9.3 OFDM540 -10.3-9.7-9.5-9.3-9.4 SC1080 -10.5-9.7-9.5-9.4-9.2 OFDM1080 -10.4-9.7-9.8-9.2-9.3 May 2015 Slide 13Frank Hsu (MediaTek)

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

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

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

17 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results Detection error rate: AWGN & CFO 20 ppm 10 -3 PHY Type SNR (dB) Ctrl -7.8 SC540 -7.6 OFDM540 -7.7 SC1080 -7.7 OFDM1080 -7.7 10 -3 May 2015 Slide 17Frank Hsu (MediaTek)

18 doc.: IEEE 802.11-15/0706r2 Submission AWGN Simulation Results Detection error rate: AWGN & CFO -20 ppm 10 -3 PHY Type SNR (dB) Ctrl -7.9 SC540 -7.7 OFDM540 -7.9 SC1080 -7.7 OFDM1080 -7.8 10 -3 May 2015 Slide 18Frank Hsu (MediaTek)

19 doc.: IEEE 802.11-15/0706r2 Submission Exp 4ns Simulation Results Detection error rate: Exp 4ns & CFO 0 ppm PHY Type SNR (dB) Ctrl -10.7 SC540 -10.4 OFDM540 -10.5 SC1080 -10.6 OFDM1080 -10.7 10 -2 May 2015 Slide 19Frank Hsu (MediaTek)

20 doc.: IEEE 802.11-15/0706r2 Submission Exp 10ns Simulation Results Detection error rate: Exp 10ns & CFO 0 ppm PHY Type SNR (dB) Ctrl -9.4 SC540 -9.7 OFDM540 -9.7 SC1080 -9.4 OFDM1080 -9.4 10 -2 May 2015 Slide 20Frank Hsu (MediaTek)

21 doc.: IEEE 802.11-15/0706r2 Submission Exp 20ns Simulation Results Detection error rate: Exp 20ns & CFO 0 ppm PHY Type SNR (dB) Ctrl -8.2 SC540 -8.3 OFDM540 -8.2 SC1080 -7.9 OFDM1080 -8.5 10 -2 May 2015 Slide 21Frank Hsu (MediaTek)

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

23 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 23 Frank Hsu (MediaTek)

24 doc.: IEEE 802.11-15/0706r2 Submission AWGN SchemeSNR @10 -1 PER 11.29 2 3 41.28 5 May 2015 Slide 24 Frank Hsu (MediaTek)

25 doc.: IEEE 802.11-15/0706r2 Submission Exp 4ns SchemeSNR @10 -1 PER 13.13 23.09 33.07 4 53.05 May 2015 Slide 25

26 doc.: IEEE 802.11-15/0706r2 Submission Exp 10ns SchemeSNR @10 -1 PER 13.73 23.45 33.41 43.47 53.42 May 2015 Slide 26 Frank Hsu (MediaTek)

27 doc.: IEEE 802.11-15/0706r2 Submission 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 May 2015 Slide 27 Frank Hsu (MediaTek)

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