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May 2015 Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: Frank Hsu, et. al. (MediaTek)

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Presentation on theme: "May 2015 Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: Frank Hsu, et. al. (MediaTek)"— Presentation transcript:

1 May 2015 Bandwidth and Packet Type Detection Schemes for 40-50GHz Millimeter Wave Communication Systems Authors: Frank Hsu, et. al. (MediaTek)

2 May 2015 Introduction In IEEE aj 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 Frank Hsu, et. al. (MediaTek)

3 May 2015 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 Frank Hsu, et. al. (MediaTek)

4 May 2015 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 Frank Hsu, et. al. (MediaTek)

5 May 2015 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 Frank Hsu, et. al. (MediaTek)

6 May 2015 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 SC PHY - + + OFDM PHY 1080 MHZ + + + 1080 MHz Frank Hsu, et. al. (MediaTek)

7 Simulations Correct detection includes Simulation setup
May 2015 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 Frank Hsu, et. al. (MediaTek)

8 AWGN Simulation Results (1/5)
May 2015 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 OFDM1080 10-3 Frank Hsu, et. al. (MediaTek)

9 AWGN Simulation Results (2/5)
May 2015 AWGN Simulation Results (2/5) Detection error rate: AWGN & CFO 5 ppm PHY Type SNR (dB) Ctrl -9.8 SC540 -9.6 OFDM540 -9.7 SC1080 OFDM1080 10-3 10-3 Frank Hsu, et. al. (MediaTek)

10 AWGN Simulation Results (3/5)
May 2015 AWGN Simulation Results (3/5) Detection error rate: AWGN & CFO -5 ppm PHY Type SNR (dB) Ctrl -9.6 SC540 OFDM540 -9.5 SC1080 OFDM1080 -9.8 10-3 10-3 Frank Hsu, et. al. (MediaTek)

11 AWGN Simulation Results (4/5)
May 2015 AWGN Simulation Results (4/5) Detection error rate: AWGN & CFO 10 ppm PHY Type SNR (dB) Ctrl -9.3 SC540 OFDM540 SC1080 -9.4 OFDM1080 -9.2 10-3 10-3 Frank Hsu, et. al. (MediaTek)

12 AWGN Simulation Results (5/5)
May 2015 AWGN Simulation Results (5/5) Detection error rate: AWGN & CFO -10 ppm PHY Type SNR (dB) Ctrl -9.3 SC540 OFDM540 -9.4 SC1080 -9.2 OFDM1080 10-3 10-3 Frank Hsu, et. al. (MediaTek)

13 AWGN Performance Summary
May 2015 AWGN Performance Summary Detection 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 ppm 5 ppm -5 ppm 10 ppm -10 ppm Ctrl -10.4 -9.8 -9.6 -9.3 SC540 -10.5 OFDM540 -10.3 -9.7 -9.5 -9.4 SC1080 -9.2 OFDM1080 Frank Hsu, et. al. (MediaTek)

14 May 2015 Summary A preamble design is proposed for packet type and bandwidth auto-detection Simulations show that detection performance fits current 11aj specification requirements Frank Hsu, et. al. (MediaTek)

15 References [1] 11-14-1363-00-00aj-preamble-sequence-for-802-11aj-45ghz
May 2015 References [1] aj-preamble-sequence-for aj-45ghz [2] Complete-specification-proposal-IEEE aj(45GHz)_v0.1.1 [3] aj-ldpc-coding-for-45ghz Frank Hsu, et. al. (MediaTek)

16 May 2015 BACKUP Slide 16 Frank Hsu, et. al. (MediaTek)

17 AWGN Simulation Results
May 2015 AWGN Simulation Results Detection error rate: AWGN & CFO 20 ppm PHY Type SNR (dB) Ctrl -7.8 SC540 -7.6 OFDM540 -7.7 SC1080 OFDM1080 10-3 10-3 Frank Hsu, et. al. (MediaTek)

18 AWGN Simulation Results
May 2015 AWGN Simulation Results Detection error rate: AWGN & CFO -20 ppm PHY Type SNR (dB) Ctrl -7.9 SC540 -7.7 OFDM540 SC1080 OFDM1080 -7.8 10-3 10-3 Frank Hsu, et. al. (MediaTek)

19 Exp 4ns Simulation Results
May 2015 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 10-2 Frank Hsu, et. al. (MediaTek)

20 Exp 10ns Simulation Results
May 2015 Exp 10ns Simulation Results Detection error rate: Exp 10ns & CFO 0 ppm PHY Type SNR (dB) Ctrl -9.4 SC540 -9.7 OFDM540 SC1080 OFDM1080 10-2 Frank Hsu, et. al. (MediaTek)

21 Exp 20ns Simulation Results
May 2015 Exp 20ns Simulation Results Detection error rate: Exp 20ns & CFO 0 ppm PHY Type SNR (dB) Ctrl -8.2 SC540 -8.3 OFDM540 SC1080 -7.9 OFDM1080 -8.5 10-2 Frank Hsu, et. al. (MediaTek)

22 CE Schemes Five CE schemes
May 2015 CE Schemes Five CE schemes Colored Z256s are taken to estimate the channel Scheme CEF Sign Sequence 1 + 2 + - 3 + + 4 5 + + + Slide 22 Frank Hsu, et. al. (MediaTek)

23 Simulation Setup Packet Type/BW: SC 540 MHz Packet Size: 1050 bytes
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 Slide 23 Frank Hsu, et. al. (MediaTek)

24 AWGN Scheme SNR @10-1 PER 1 1.29 2 3 4 1.28 5 May 2015 Slide 24
Frank Hsu, et. al. (MediaTek)

25 Exp 4ns Scheme SNR @10-1 PER 1 3.13 2 3.09 3 3.07 4 5 3.05 May 2015
Slide 25 Frank Hsu, et. al. (MediaTek)

26 May 2015 Exp 10ns Scheme PER 1 3.73 2 3.45 3 3.41 4 3.47 5 3.42 Slide 26 Frank Hsu, et. al. (MediaTek)

27 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 Slide 27 Frank Hsu, et. al. (MediaTek)

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