Enhanced Impulse Radio for IEEE P802.15 Working Group

Submission for IEEE P802.15 Working Group presenting the SRDEV.PPDU for Enhanced Impulse Radio. The document outlines the two enhancement stages, Minimally Incremental Mode (MIM) and Performance Optimized Mode (POM), focusing on supporting specific frequency channels and enhancing performance through various elements. The proposal includes details on PRF modes, frame formats, STS generation, and performance improvements with Digital Side-Lobe Suppression (DSLS).

• Wireless Personal Area Networks
• IEEE P802.15
• Enhanced Impulse Radio
• SRDEV.PPDU
• Performance Optimization

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1. July 2018 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) doc.: <15-18-0335-00-004z> Submission Title: [SRDEV PPDU for Enhanced Impulse Radio] Date Submitted: [10 July, 2018] Source: [Frank Leong (NXP Semiconductors), Wolfgang K chler (NXP Semiconductors), Thomas Baier (NXP Semiconductors), Brima Ibrahim (NXP Semiconductors), Jochen Hammerschmidt (Apple), Ayman Naguib (Apple), Thomas Reisinger (Continental), Daniel Knobloch (BMW)] Re: [Input to the Task Group] Abstract: [Presentation, SRDEV PPDU, Enhanced Impulse Radio] Purpose: [] Notice: 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 acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15. This document has been prepared to assist the IEEE P802.15. It is offered as a basis for Submission Slide 1 NXP, Apple, Continental, BMW

2. July 2018 doc.: <15-18-0335-00-004z> SRDEV PPDU Summary of 15-18-0286-01-004z-hrp-uwb-srdev-ppdu-text-contribution.docx Submission Slide 2 NXP, Apple, Continental, BMW

3. July 2018 doc.: <15-18-0335-00-004z> Overall Approach General: Nominal mean PRF 62.4 MHz Require support for CH5 (6489.6 MHz) and CH9 (7987.2 MHz) Distinguish between two enhancement stages: Minimally Incremental Mode ( MIM ) Retain a large number of elements from the existing 802.15.4 PHY Allow re-use of legacy implementations with modest alterations Consider reduced implementation subset Performance Optimized Mode ( POM ) Additional signaling and performance enhancements Submission Slide 3 NXP, Apple, Continental, BMW

4. July 2018 doc.: <15-18-0335-00-004z> MIM: PRF64 Mode Legacy SYNC, SFD, PHR, PSDU Add Scrambled Timestamp Sequence (STS) field Three associated frame formats Submission Slide 4 NXP, Apple, Continental, BMW

5. July 2018 doc.: <15-18-0335-00-004z> MIM: PRF64 Mode, STS STS generated by Deterministic Random Bit Generator (DRBG) based on AES-128 Provide for baseline performance that does not require Rx with Digital Side-Lobe Suppression (DSLS) Performance can be further enhanced when DSLS is applied Submission Slide 5 NXP, Apple, Continental, BMW

6. July 2018 doc.: <15-18-0335-00-004z> MIM: PRF64 STS w/o DSLS Simulation performed for ????,???????= 32768 (~65 s), across a {-128 ns, +128 ns} window around the main lobe Further ~3 dB improvement with finer pulse grid, see 5.3.4 Submission Slide 6 NXP, Apple, Continental, BMW

7. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 Mode STS with highest possible natural BPSK entropy for L=4 Minimize frame length for given target entropy Revised SYNC, SFD, PHR, PSDU Retain a large number of elements from the existing 802.15.4 PHY Same STS-based frame formats as for PRF64 mode (@CH{5,9}) Re-use of L=4 correlator hardware in Rx Active/Guard/Active/Guard PSDU symbol structure Constant PRF, maximizing degrees of freedom in AGC implementation Optimize PSDU coding scheme Submission Slide 7 NXP, Apple, Continental, BMW

8. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 SYNC (I) Allow re-use of IEEE 802.15.4 HRP UWB L=4 correlator Maximum mean PRF (reduced PAPR) Maximum processing gain (higher dynamic range) Strongly impulse-like ACF Low, constant side-lobe level (~-42 dB for Length-127 sequence) Sidelobes may be further reduced by DSLS if desired Main purpose of SYNC is to facilitate acquisition, sidelobe performance of STS typically determines final accuracy of CIR estimate in SRDEV Improved handling of DC content Corresponding receiver is less sensitive to DC offsets/spurs Submission Slide 8 NXP, Apple, Continental, BMW

9. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 SYNC (II) Submission Slide 9 NXP, Apple, Continental, BMW

10. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 SFD Binary codes to maximize ACF/length (minimize XCF/length) ID 0 1 2 3 Pattern --+- ----++-+ ---+-+--+--+++-+ -----+---+++--+- -+-+-+--+--++--- -----+---+--+--- -+-++---+-+-+--- ----++---++-+-++ --+-----++++--+- Nsym 4 8 16 32 64 4 Submission Slide 10 NXP, Apple, Continental, BMW

11. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 PHR Simplify PHR w.r.t. legacy PHR Allow extended PSDU lengths up to 1023 bytes Same modulation, coding, and datarate as PSDU Bits: 0 1-10 Frame Length 11 Reserved Ranging Submission Slide 11 NXP, Apple, Continental, BMW

12. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 PSDU, Modulation (I) Based on BPSK Chip grid 499.2 MHz, local peak PRF 249.6 MHz Submission Slide 12 NXP, Apple, Continental, BMW

13. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 PSDU, Modulation (II) Ex. using Raised Cosine (RC) pulse shape (Tp = 2 ns, alpha = 0.5) Peak PRF 499.2 MHz: 3.46 dB headroom needed Peak PRF 249.6 MHz (i.e., w/ guard chips): 0.16 dB headroom needed Submission Slide 13 NXP, Apple, Continental, BMW

14. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 PSDU, Coding (I) Constraint length 7 (as used for IEEE802.11a/g/n/p, DVB-T/S) Using ubiquitous generator polynomials G=(133,171) Data rate of 7.8 Mbit/s (no RS coding) Efficient rate adaptation possible via puncturing Submission Slide 14 NXP, Apple, Continental, BMW

15. July 2018 doc.: <15-18-0335-00-004z> POM: PRF128 PSDU, Coding (II) Simulation performed for 21-byte PSDU Submission Slide 15 NXP, Apple, Continental, BMW

16. July 2018 doc.: <15-18-0335-00-004z> Conclusion Presented two enhancement stages: Minimally Incremental Mode (MIM) Retain a large number of elements from the existing 802.15.4 PHY Allow re-use of legacy implementations with modest alterations Consider reduced implementation subset Performance Optimized Mode (POM) Additional signaling and performance enhancements Submission Slide 16 NXP, Apple, Continental, BMW