May 2004 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Proposal Comparison Summary] Date Submitted: [May 12, 2004 Source: [Matt Welborn] Company [Freescale Semiconductor] Address [8133 Leesburg Pike Vienna, VA USA] Voice:[703-269-3000], E-Mail:[mwelborn@xtremespectrum.com] Re: Abstract: [Summarize the two PHY proposals with respect to the requirements described in the TG3a Selection criteria document.] Purpose: [Provide technical information to the TG3a voters regarding PHY proposals.] 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. Welborn, Freescale

May 2004 Introduction Goal: Summarize the two proposals with respect to the requirements described in the TG3a Selection criteria document Approach: Collect reported results from the various proposal documents and requirements from selection criteria. Disclaimer: The author of this document is also one of the authors of the DS-UWB (Merger #2) proposal. Opinions/comments are so labeled Welborn, Freescale

Source Documents Merger #1: Merger #2: Selection Criteria: 03/268r3 May 2004 Source Documents Merger #1: 03/268r3 04/220 Merger #2: 04/137r2 04/099r2 04/140r4 Selection Criteria: 03/031r11 Welborn, Freescale

3.1 Unit Manufacturing Cost May 2004 3.1 Unit Manufacturing Cost Selection Criterion MB-OFDM DS-UWB The cost/complexity of the device must be as minimal as possible [sic] for use in the personal area space, see [03/030]. 455k gates at 85.5 MHz 183-204k gates at 85.5 MHz Comments: Similar requirements for major external components Similar semiconductor process technologies Based on conversion from reported 295k gates at 132 MHz Welborn, Freescale

3.2.2 Interference & Susceptibility May 2004 3.2.2 Interference & Susceptibility Selection Criterion MB-OFDM DS-UWB Susceptibility of UWB Receiver to radiation from other systems Mandatory mode: The proposal meets all of the minimum & desired values Comments: Optional modes The proposal does not meet the minimum requirement for 802.11a interference for BG2 (optional) Welborn, Freescale

3.2.2.6-7 Generic In-band Interference May 2004 3.2.2.6-7 Generic In-band Interference Selection Criterion MB-OFDM DS-UWB … using simulation results, analysis, or technical explanations, determine the average received interference power that can be tolerated by the receiver, … The proposal meets all of the minimum values Comments: Minimum value is PI-Pd>3 dB at 6 dB above sensitivity Required erasure decoding of impacted bits No data for performance without erasures Additional rejection possible & feasible using RFI extraction More protection in optional high band Welborn, Freescale

3.2.3 Coexistence Selection Criterion MB-OFDM DS-UWB May 2004 3.2.3 Coexistence Selection Criterion MB-OFDM DS-UWB Coexistence, in this context, refers to the co-location of IEEE P802.15.3a devices with other, non-P802.15.3a devices. All the victim receivers specified in the selection criteria document are essentially out-of-band Comments Dynamic turning off of tones proposed for enhanced coexistence 802.11a not out-of-band for optional BG2- no data given Optional mode: Welborn, Freescale

3.3.1 Manufacturability Selection Criterion MB-OFDM DS-UWB May 2004 3.3.1 Manufacturability Selection Criterion MB-OFDM DS-UWB Manufacturability is defined in terms of the use of mature, cost effective manufacturing processes with evidence of effective mass production capability. “The proposed UWB solution will leverage current standard CMOS technology.” Proposed for 130 or 90 nm CMOS “In addition, the digital section of the proposed PHY is similar to that of conventional and mature OFDM solutions, such as 802.11a and 802.11g.” Integrated solutions are already available Works in 180 nm CMOS – No Risk Comments: The proposers are asked to submit proof of the claims by way of expert opinion, models, experiments, pre-existence examples, or demonstrations. Welborn, Freescale

3.2.2 Time to Market Selection Criterion MB-OFDM DS-UWB May 2004 3.2.2 Time to Market Selection Criterion MB-OFDM DS-UWB Time to Market addresses the question of when the proposed technology will be ready for integration. “The earliest a complete CMOS PHY solution would be ready for integration is by the first half of 2005.” Full integrated system available now. Validated PHY (RF & BaseBand) Integrated with MAC & upper layer protocol stack Comments: Welborn, Freescale

3.3.3 Regulatory Impact Selection Criterion MB-OFDM DS-UWB May 2004 3.3.3 Regulatory Impact Selection Criterion MB-OFDM DS-UWB The proposal should specify to which geopolitical regions it applies and identify any applicable requirements with which it conflicts. “The FCC respects the need to resolve the rules interpretation issue quickly and is doing everything they can to progress in a timely manner.” Fully Approved No known issues with US UWB rules under CFR Part 15 Comments: Rules are only known for US region Welborn, Freescale

3.4 Scalability Selection Criterion MB-OFDM DS-UWB May 2004 3.4 Scalability Selection Criterion MB-OFDM DS-UWB Scalability refers to the ability to adjust important parameters, such as those mentioned below, (if they are required by the applications) without rewriting the standard. Scales power consumption, range and complexity versus data rate Scale to higher frequency bands Dynamic BW by turning on/off tones Same as MB-OFDM (except for tones) Power consumption & complexity scale to different multipath conditions Comments: Proposers are further encouraged to show scalability up to 480 Mb/s and beyond, as well as 110Mb/s and below, as consistent with the table of applications in Section 2 of [03/030]. Does not scale to >480 Mbps Requires notching or pre-computing new acquisition preamble for dynamic BW Also scales to 660, 1000 and 1320 Gbps Welborn, Freescale

3.5 Location Awareness Selection Criterion MB-OFDM DS-UWB May 2004 3.5 Location Awareness Selection Criterion MB-OFDM DS-UWB The proposal should specify to which geopolitical regions it applies and identify any applicable requirements with which it conflicts. “The total bandwidth of a Mode 1 Multi-band OFDM system is 1584 MHz, thus the accuracy that can be obtained for the location awareness is at least 10 cm.” Low band coherent bandwidth is1723 MHz High band coherent bandwidth is 3447 MHz Comments: Time resolution for TOA is inversely proportional to signal bandwidth 1/528 MHz = 1.9 ns ~= 57 cm? 1/1584 MHz = 631 ps ~= 19 cm? Corresponds to 17 cm and 9 cm range resolution Simple – Radio works in time domain DSP can somewhat improve range resolution for both, bandwidth is still a fundamental limit. Welborn, Freescale

4.1 Alternate PHY Required MAC Enhancements and Modifications May 2004 4.1 Alternate PHY Required MAC Enhancements and Modifications Selection Criterion MB-OFDM DS-UWB Supplements and modifications to the MAC may be required to accommodate the alternate PHY. Support for channelization using Time-Frequency Codes Support for channelization using spreading codes & chip rate offsets Comments Not yet detailed: Dynamic band & tone configuration Welborn, Freescale

5.1 Size and Form Factor Selection Criterion MB-OFDM DS-UWB May 2004 5.1 Size and Form Factor Selection Criterion MB-OFDM DS-UWB Proposers shall provide a time line estimate of when their proposed PHY and the P802.15.3 MAC will fit into the following form factors: PC Card Compact Flash Memory Stick SD Memory   “Solutions for the PC card, compact flash, memory stick, and SD memory will be available in 2005” Proven Solutions for the PCMCIA size are available now. Size reduction to memory stick, and SD will be available in 2004 Welborn, Freescale

5.2 PHY-SAP Payload bit-rate and Data Throughput May 2004 5.2 PHY-SAP Payload bit-rate and Data Throughput Selection Criterion MB-OFDM DS-UWB The proposer should provide the payload bit rates to meet the mandatory and optional payload bit rates for the PHY-SAP as defined in clause 2 of [03/030]. Required 110 and 200 Mbps rates are provided Maximum bit rate of 480 Mbps Required 110 and 220 Mbps rates are provided Higher bit rates of 480, 660, 1000, & 1320 Mbps provided Throughput values: Throughputs of 47-259 Mbps using single and multiple frames @ 1024 octet packets Throughputs of 53-398 Mbps @ 4024 octets Throughputs of 24-698 Mbps using single and multiple frames @ 1024 octet packets Throughputs of 26-1080 Mbps @ 4096 octets Welborn, Freescale

5.3 Simultaneously Operating Piconets May 2004 Selection Criterion MB-OFDM DS-UWB The proposal should evaluate the effect of simultaneously operating piconets as specified in clause 3 of [03/030] for the following specified parameters: Packet length of 1024 octet frame body PHY-SAP bit rates (110 Mb/s, 200 Mb/s and the optional 480 Mb/s) Random initial symbol alignment between reference link and interferers At 110 Mbps: Distance ratios of 0.4 to 1.9 for 1-3 interferers No data provided for SOP performance at 200 & 480 Mbps Distance ratios of 0.64 to 1.24 for 1-3 interferers At 220 Mbps (AWGN): Distance ratios of 0.9 to 1.6 for 1-3 interferers At 500 Mbps (AWGN): Distance ratios of 2.2 to 3.3 for 1-2 interferers Supports 4 piconets in the lowest frequency band group (Mode I) Supports 6 piconets in the low frequency band Welborn, Freescale

5.4 Signal Acquisition Selection Criterion MB-OFDM DS-UWB May 2004 5.4 Signal Acquisition Selection Criterion MB-OFDM DS-UWB The proposer should provide the false alarm probability and the miss detect probability for the proposed preamble design in both AWGN and the environment specified by the channel model in document [02/490]. Results not yet provided for revised proposal Welborn, Freescale

5.5 System Performance Selection Criterion MB-OFDM DS-UWB May 2004 5.5 System Performance Selection Criterion MB-OFDM DS-UWB System performance refers to the ability of the system to successfully acquire and demodulate data packets at the required data rates and bit and packet error rates… The proposal meets the minimum values for 90% outage ranges in AWGN and multipath: 10 m @ 110 Mbps 4 m @ 200 Mbps The proposal meets the minimum values for 90% outage ranges for AWGN and multipath: Comments: Welborn, Freescale

5.6 Link Budget Selection Criterion MB-OFDM DS-UWB May 2004 5.6 Link Budget Selection Criterion MB-OFDM DS-UWB Link budget is used to determine proposal capabilities under certain operating conditions for the standards specified bit rates, ranges, and bit error rate. 6.0 dB @ 110 Mbps and 10 meters 5.2 dB @ 110 Mbps and 10 meters 10.7 dB @ 200 Mbps and 4 meters 10.2 dB @ 220 Mbps and 4 meters 12.2 dB @ 480 Mbps and 2 meters 11.2 dB @ 500 Mbps and 2 meters 8.2 dB @ 1000 Mbps and 2 meters Comments Rate ¾ punctured FEC gain of 4.7 dB is likely not achievable Includes no transmit power back-off Includes transmit power back-off of 0-1.9 dB Welborn, Freescale

5.7 Sensitivity Selection Criterion MB-OFDM DS-UWB May 2004 5.7 Sensitivity Selection Criterion MB-OFDM DS-UWB The proposal should indicate the power level at which the error criterion is met, consistent with the link budget as presented in document [02/490], Table 1. -80.5 dBm @ 110 Mbps -79.5 dBm @ 110 Mbps -77.2 dBm @ 200 Mbps -76.5 dBm @ 220 Mbps -72.7 dBm @ 480 Mbps -71.4 dBm @ 500 Mbps -68.4 dBm @ 1 Gbps Comments: Welborn, Freescale

5.8 Power Management Modes May 2004 5.8 Power Management Modes Selection Criterion MB-OFDM DS-UWB The proposal should explain if it supports each of the power management methods as defined in the proposed 802.15.3 standard. “The proposed PHY system shall support all of the power managements modes (ACTIVE, PSPS, SPS, and HIBERNATE) defined the IEEE 802.15.3 draft standard.” The proposed PHY system will support all of the power managements modes defined the IEEE 802.15.3 draft standard. Comments: Welborn, Freescale

5.9 PHY Power Consumption Selection Criterion MB-OFDM DS-UWB May 2004 5.9 PHY Power Consumption Selection Criterion MB-OFDM DS-UWB Power consumption is defined as the total average power required by the proposed system to operate in transmit, receive, clear channel assessment, or power saving modes. 90 nm: 93-145 mW transmit 155-236 mW receive 130 nm: 117-180 mW transmit 205-323 mW receive Power estimates not yet complete for fully-digital architecture Digital gate count is about 50% < MB-OFDM Analog has no DAC and no hopping. 3-bit A/D @ 1.4GHz is about the same as ~ 4/5-bit 528 MHz A/D Overall, DS-UWB has the advantage Comments: Welborn, Freescale

5.10 Antenna Practicality Selection Criterion MB-OFDM DS-UWB May 2004 5.10 Antenna Practicality Selection Criterion MB-OFDM DS-UWB Antenna form factor should be described with reference to expected size. “A 16 mm  13.6 mm x 3 mm antenna with similar characteristics is already commercially available at a low cost and can meet many of the form factors specified in the selection criteria document.” Same as for MB-OFDM. Four different antenna designs tested with system Comments Both systems occupy essentially the same frequency band in their baseline modes. Welborn, Freescale