January 2005 Project: IEEE P802.15 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: [802.15.4a CFP] Abstract: [802.15.4a CFP response] Purpose: [Response to WPAN-802.15.4a CFP] Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. Gadi Shor, Sorin Goldenberg (Wisair)

Proposal: UWB Low Rate Alternate Physical Layer for TG 802.15.4a <month year> doc.: IEEE 802.15-<doc#> Proposal: UWB Low Rate Alternate Physical Layer for TG 802.15.4a Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

Proposal Contents General Overview Proposal Principles January 2005 Proposal Contents General Overview Proposal Principles Coding & Interleaving Preamble Band Management Implementation Performance Evaluation Matrix Gadi Shor, Sorin Goldenberg (Wisair)

General Overview Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 UWB Low Rate Task Group 4a 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 support low data rate communication, ranging and location Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 Proposal Overview Available spectrum divided into fourteen, 528 MHz sub-bands 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 division multiplexing (TDM) and time division interleaving (TDI) Concatenated coding and repetition coding Dynamic band management for interference mitigation and fading conditions Scalable transmitter and receiver architecture Ranging and location can be done using receiver capabilities Gadi Shor, Sorin Goldenberg (Wisair)

Proposal Principles Gadi Shor, Sorin Goldenberg (Wisair)

Band Plan January 2005 Gadi Shor, Sorin Goldenberg (Wisair) BAND_ID Lower frequency Center frequency Upper frequency 1 3168 MHz 3432 MHz 3696 MHz 2 3960 MHz 4224 MHz 3 4488 MHz 4752 MHz 4 5016 MHz 5280 MHz 5 5544 MHz 5808 MHz 6 6072 MHz 6336 MHz 7 6600 MHz 6864 MHz 8 7128 MHz 7392 MHz 9 7656 MHz 7920 MHz 10 8184 MHz 8448 MHz 11 8712 MHz 8976 MHz 12 9240 MHz 9504 MHz 13 9768 MHz 10032 MHz 14 10296 MHz 10560 MHz Gadi Shor, Sorin Goldenberg (Wisair)

Symbol definition Symbol is based on shaped hierarchical sequences: January 2005 Symbol definition Symbol is based on shaped hierarchical sequences: 16x8 samples hierarchical sequences 37 samples zero padding suffix (64 samples under study) 528 Mcps/165 samples = 3.2 Msps Both shaped (flat PSD) and unshaped (constant envelope) allowed For lower data rates symbols can be sent in a lower duty cycle (can replace transmit power control and save power consumption) Data is modulated in two dimensions: Phase modulation (BPSK) Orthogonal symbol set modulation (M=2) (e.g. A,B and A,-B) Different interleaving (and coding) for each dimension Data can be demodulated from a single dimension May be replaced by differential encoding (under study) Gadi Shor, Sorin Goldenberg (Wisair)

Coding & Interleaving Gadi Shor, Sorin Goldenberg (Wisair)

Error Correction Coding January 2005 Error Correction Coding Concatenated coding and repetition coding Exact scheme under study (ideas welcome) Allows simple decoding using sub-optimal decoders (e.g. using systematic or reversible encoders) Coded data is spread over frequency and time for diversity Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 Interleaving Scheme Coded bits are interleaved before modulation using simple block interleaving Two different interleaving (and coding) schemes for each modulation dimension Gadi Shor, Sorin Goldenberg (Wisair)

Scrambler Use same scrambler as MB-OFDM standard: PRBS Generator January 2005 Scrambler Use same scrambler as MB-OFDM standard: PRBS Generator Initial Seed Value Four initial seed values Gadi Shor, Sorin Goldenberg (Wisair)

Data Rates Raw aggregate data rate is 3.2 Mbps January 2005 Data Rates Raw aggregate data rate is 3.2 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 Gadi Shor, Sorin Goldenberg (Wisair)

Repetition and Duty Cycle factor January 2005 Data Rates (2) Mode Coding Rate Symbol Rate [Msym/sec] Repetition and Duty Cycle factor Data Rate [Kbits/sec] 1 3.2 10 320 2 ¾ 240 3 ½ 160 4 40 5 6 640 2.5 Remark: Repetition and Duty Cycle factor is the effective rate NxR after including the symbol duty cycle (i.e. 1 out of N) and the repetition code rate (i.e. 1/R) Gadi Shor, Sorin Goldenberg (Wisair)

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Preamble Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> January 2005 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 Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Band Management Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> January 2005 FDM (14 bands) Multiple access Flexibility for world wide regulation Simple co-existence with existing and future radios Interference mitigation Severe fading mitigation Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Ranging and Location Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

January 2005 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 Gadi Shor, Sorin Goldenberg (Wisair)

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Implementation Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

January 2005 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 Gadi Shor, Sorin Goldenberg (Wisair)

Receiver Many possible architectures January 2005 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 Gadi Shor, Sorin Goldenberg (Wisair)

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Performance Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

Performance Scalable performance Performance meets PAR requirements January 2005 Performance Scalable performance Performance can be enhanced by receiver complexity Performance meets PAR requirements Gadi Shor, Sorin Goldenberg (Wisair)

January 2005 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 Enabled by simple implementation Scalable receiver/transmitter for complexity & power tradeoffs Gadi Shor, Sorin Goldenberg (Wisair)

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Backup Slides Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

doc.: IEEE 802.15-<doc#> <month year> doc.: IEEE 802.15-<doc#> Evaluation Matrix Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

Self Evaluation – General Solution Criteria <month year> doc.: IEEE 802.15-<doc#> January 2005 Self Evaluation – General Solution Criteria CRITERIA Evaluation Unit Manufacturing Cost (UMC) + Signal Robustness Interference And Susceptibility Coexistence Technical Feasibility Manufacturability Time To Market Regulatory Impact Scalability Location Awareness Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>

Self Evaluation – PHY Protocol Criteria <month year> doc.: IEEE 802.15-<doc#> January 2005 Self Evaluation – PHY Protocol Criteria 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 Gadi Shor, Sorin Goldenberg (Wisair) <author>, <company>