January 2005 doc IEEE 802 15 05 0012

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Project: IEEE P 802. 15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Wisair-CFP-Response] Date Submitted: [4 January, 2005] Source: [Gadi Shor, Sorin Goldenberg] Company: [Wisair] Address: [24 Raoul Wallenberg st. Ramat Hachayal, Tel-Aviv, ISRAEL] Voice: [+972 -3 -7676605] FAX: [+972 -3 -6477608], E-Mail: [gadi. shor@wisair. com] Re: [802. 15. 4 a CFP] Abstract: [802. 15. 4 a CFP response] Purpose: [Response to WPAN-802. 15. 4 a CFP] Notice: This document has been prepared to assist the IEEE P 802. 15. It is offered as a basis for 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 P 802. 15. Submission 1 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Proposal: UWB Low Rate Alternate Physical Layer for TG 802. 15. 4 a Submission Slide 2 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Proposal Contents • • General Overview Proposal Principles Coding & Interleaving Preamble Band Management Implementation Performance Evaluation Matrix Submission 3 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a General Overview Submission Slide 4 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a UWB Low Rate • Task Group 4 a have issued a call for proposal (CFP) for an alternate Physical layer for: – Low data rate communication – Ranging and location • This proposal is a response to the CFP – The proposal uses the UWB spectrum – The proposal supports low data rate communication, ranging and location Submission 5 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Proposal Overview • Available spectrum divided into fourteen, 528 MHz subbands – Similar to MB-OFDM division for co-existence • Multiple piconet isolation obtained through frequency division multiplexing (FDM) and symbol definition – 14 available bands and ability to share the same band • User separation using time domain multiple access techniques • Concatenated coding and repetition coding • Dynamic band management for interference and fading conditions mitigation • Scalable transmitter and receiver architecture • Ranging and location can be done using receiver capabilities Submission 6 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Proposal Principles Submission Slide 7 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Band Plan BAND_ID Lower frequency Center frequency Upper frequency 1 3168 MHz 3432 MHz 3696 MHz 2 3696 MHz 3960 MHz 4224 MHz 3 4224 MHz 4488 MHz 4752 MHz 4 4752 MHz 5016 MHz 5280 MHz 5544 MHz 5808 MHz 6072 MHz 6336 MHz 7 6336 MHz 6600 MHz 6864 MHz 8 6864 MHz 7128 MHz 7392 MHz 9 7392 MHz 7656 MHz 7920 MHz 10 7920 MHz 8184 MHz 8448 MHz 11 8448 MHz 8712 MHz 8976 MHz 12 8976 MHz 9240 MHz 9504 MHz 13 9504 MHz 9768 MHz 10032 MHz 14 10032 MHz 10296 MHz 10560 MHz Submission 8 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Transmitter Block Diagram Remark: Repetition can be distributed prior/post the differential encoder (under study) Submission 9 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Symbol definition • Symbol is based on shaped hierarchical sequences: – – – 16 x 8 samples hierarchical sequences 48 samples zero padding suffix 528 Mcps/176 samples = 3 Msps Both shaped (flat PSD) and unshaped (constant envelope) allowed For lower data rates symbols can be sent at a lower duty cycle (can replace transmit power control and save power consumption) • The coded data (after differential encoding and repetition) is modulated using BPSK – Each symbol is multiplied by an element from a PN sequence – Each symbol (after multiplication) is modulated using BPSK Remark: The modulation method can be replaced by orthogonal encoding (under study) Submission 10 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Coding & Interleaving Submission Slide 11 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Error Correction Coding • Concatenated coding with differential encoding and repetition encoding • Allows simple decoding using sub-optimal decoders (e. g. using systematic or reversible encoders) • Coded data is spread over frequency and time for diversity • Exact scheme under study (ideas welcome) Submission 12 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Interleaving Scheme • The interleaving scheme is based on simple block/convolution interleaving Submission 13 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Scrambler • Use same scrambling scheme as MBOFDM proposal: PRBS Generator Initial Seed Value Submission Four initial seed values 14 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Data Rates • Raw aggregate data rate is 3 Mbps • Information aggregate rate determined by – Coding rate – Repetition and Duty cycle • Many possible rates to select from • High aggregate rate allows many low rate users • Each user can have its own coding and spreading rates Submission 15 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Data Rates (2) Mod e Coding Rate Symbol Rate [Msym/sec] Repetition and Duty Cycle factor Data Rate [Kbits/sec] 1 1 3000 2 ½ 3 1 1500 3 ⅓ 3 1 1000 4 1 3 10 300 5 ½ 3 10 150 6 ⅓ 3 10 100 7 ½ 3 20 75 Remark: Repetition and Duty Cycle factor is the effective rate Nx. R after including the symbol duty cycle (i. e. 1 out of N) and the repetition code rate (i. e. 1/R) Submission 16 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Preamble Submission Slide 17 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Preamble Structure • Preamble is based on shaped hierarchical sequences • Preamble uses a cover sequence and frame synchronization sequence • Preamble contains channel estimation symbols for improved reception • Three different preamble lengths supported • Preamble includes symbols for antenna diversity Submission 18 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Band Management Submission Slide 19 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a FDM (14 bands) • Multiple access • Flexibility for world wide regulation • Simple co-existence with existing and future radios • Interference mitigation • Severe fading mitigation Submission 20 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Ranging and Location Submission Slide 21 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Ranging and location • Modulation/demodulation scheme allows high resolution estimation of first path (and if needed complete channel) – Used as the basis for the ranging procedure – Can use special frame for improved ranging – Information can be distributed through the communication system to allow location, based on multiple relative ranging operations – See document for relative range estimation algorithm Submission 22 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Implementation Submission Slide 23 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Transmitter • Many possible architectures (constant envelope or constant PSD, with/without DAC) • No need for I/Q modulator (BPSK) • Can use digital (+/-1), DAC based or analog sequences • Can be implemented using CMOS process • Low power consumption / Small die size / Share MB-OFDM radio Submission 24 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Receiver • Many possible architectures • Support for coherent and non-coherent receivers – Tradeoff between complexity and performance • Support analog and digital demodulation – Correlation/de-spreading can be done in analog or digital domains – ADC can work in bit rate, sample rate (or sample rate/8) – Support for architecture with no ADC Submission 25 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Performance Submission Slide 26 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Performance • Scalable performance – Performance can be enhanced by receiver complexity • Performance under study Submission 27 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Summary • Proposed UWB system architecture provides spectrum flexibility for – World-wide regulation – Co-existence with current and future systems – Interference mitigation • Enables low complexity, low power , low cost solution • Good performance in multi-path and with multiple access interference – Enables simplementation – Scalable receiver/transmitter for complexity & power tradeoffs Submission 28 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Backup Slides Submission Slide 29 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Evaluation Matrix Submission Slide 30 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Self Evaluation – General Solution Criteria Signal Robustness Technical Feasibility CRITERIA Evaluation Unit Manufacturing Cost (UMC) + Interference And Susceptibility + Coexistence + Manufacturability + Time To Market + Regulatory Impact + Scalability + Location Awareness + Submission 31 Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 doc. : IEEE 802. 15 -05 -0012 -04 -004 a Self Evaluation – PHY Protocol Criteria Submission CRITERIA Evaluation Size and Form Factor + Payload Bit Rate + Packet Overhead + PHY-SAP Throughput + Simultaneously Operation Piconets + Signal Acquisition + System Performance + Link Budget + Sensitivity + Power Management Modes + Power Consumption + Antenna Practicality + 32 Gadi Shor, Sorin Goldenberg (Wisair)