January 2004 doc.: IEEE a Submission Slide 1 Jason Ellis, Staccato Communications Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Liaison report for n to Working Group 15] Date Submitted: [15 January, 2004] Source: [Jason Ellis- IEEE Liaison to n; Company [Staccato Communications] Address [5893 Oberlin Drive, Suite 105, San Diego, CA 92121] Voice:[+1 (858) ], FAX: [+1 (858) ], Re: [] Abstract:[802.11n liaison report for IEEE Working Group 15] Purpose:[] Notice:This document has been prepared to assist the IEEE P 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

January 2004 doc.: IEEE a Submission Slide 2 Jason Ellis, Staccato Communications Liaison report for n to Working Group Provides updates of major discussions and activities January 2004 IEEE Meeting Vancouver

January 2004 doc.: IEEE a Submission Slide 3 Jason Ellis, Staccato Communications Goals for the Week Complete and adopt –usage models(Work in progress, time frame - March) –functional requirements (Work in progress, time frame - March) –comparison criteria (Work in progress, time frame - March) Issue a call for proposals (Likely to happen in March-May) TASK GROUP CHAIR ELECTION HELD IN WORKING GROUP PER WORKING GROUP RULES –Matthew Shoemake recently resigned from being n Chairman –Bruce Kramer of Globalspan Virata was elected as the new Chairman

January 2004 doc.: IEEE a Submission Slide 4 Jason Ellis, Staccato Communications Need for 4G High-Speed WLANs 5 m 1 Mbps10 Mbps100 Mbps1 Gbps Maximum Data rate 100 kbps 50 m 500 m Range Higher data rates Larger range More users 1G WLAN Mbps 3G WLAN a/g 6-54 Mbps 2G WLAN b Mbps 4G WLAN n > 100 Mbps doc.: IEEE / n Majority believe Mbps rates

January 2004 doc.: IEEE a Submission Slide 5 Jason Ellis, Staccato Communications Technology Discussions (2 identified technology choices) PSSS (Example)MIMO OFDM (Example) System 1 Gbit/s 100 MHz channel Single carrier or 5 carriers 1 Gbit/s, 100 MHz channel 256 QAM Analog RF in Tx / Rx Linearity < 25 dBc PAPR 6 dB Linearity > 40 dBc (?) PAPR > 17 dB (?) ADC / DAC 6,5 bit / 200 MSPS DAC in Tx (2x) or 5x 5 bit / 40 MSPS DAC in Tx (2x) 310 Integrate & Dump at 200 MSPS or 5x 62 Integrate & Dump at 40 MSPS No ADC in Rx > bit / >200 MSPS DAC in Tx > bit / >200 MSPS ADC in Rx (2 each) Signal processing None requiredIFFT / FFT, > 256 points, 200 MSPS, bit Viterbi (7/8 ?), LDPC (?) Path to 1 GBit/s WLAN ? Many presentations supporting MIMO OFDM

January 2004 doc.: IEEE a Submission Slide 6 Jason Ellis, Staccato Communications Characteristics Parallel Sequence Spread Spectrum (PSSS) Characteristics Type of systemSingle carrier, spread spectrum Signal processing and coding Applicable over different modulations Range & robustness Processing gain of 15dB and higher Coding gain > 5 dB Highly scaleable with identical system building blocks Specific data rate 2 bit/s/Hz bit/s/Hz, potential for > 20 bit/s/Hz But not at the cost of robustness and/or complexity Multipath fading Tolerates multipath fading, similar in performance as OFDM No add-on of TCM, Viterbi, etc. Symbol errorsStrong robustness through underlying coding in PSSSE.g. tolerates 21 1-value errors in 31-chip sequence without DSP or complex digital design Implementation complexity Shift-register digital structure in Tx Simple ” integrate & dump ” in Rx (DSSS-like reference signal) No FFT, Viterbi etc. – low complexity Simpler DAC / ADC (or no ADC), no approximations of analog signals Low sensitivity against non-linearity Low costLower digital and analog complexity results in small die sizes Overcomes barriers for performance growth in today ’ s technologies Time-to-marketUse of all well-known components Low demands in chip complexity High reuse of existing chip designs No need for new chip processes Technology potential Enables 0,5 / 1 GBit/s WLAN (in 50/100 MHz channel) At lower chip complexity / criticality / cost than today ’ s 54 Mbit/s WLAN doc.: IEEE n

January 2004 doc.: IEEE a Submission Slide 7 Jason Ellis, Staccato Communications Different Channel Codes Convolutional code memory 6 (abbreviation CC6) Convolutional code memory 8 (CC8) Parallel concatenated code [9], UMTS turbo code memory 3 (PCC3), random bit interleaver (over packet), 8 iterations Serially concatenated code [10], inner memory 1, outer memory 2 code (SCC2), random bit interleaver (over packet), 15 iterations LDPCC, regular [11] (LDREG), random edge interleaver (over packet), 40 iterations (note: 1-Rate = dv/dc) –Rate 1/2: variable node degree dv=3, check node degree dc=6; rate 3/4: dv=3, dc=12; rate 7/8: dv=3, dc=24 LDPCC, irregular [12] (LDIRR), random edge interleaver (over packet), 40 iterations –dv,1=3 (89.74% of variable nodes), dv,2=4 (2.78%), dv,3=16 (7.48%); rate 1/2: dc=8; rate 3/4: dc=16; rate 7/8: dc=32 Many discussions on coding concepts

January 2004 doc.: IEEE a Submission Slide 8 Jason Ellis, Staccato Communications Likely n Transmitter Shown with 2 TX antennas channel encoder

January 2004 doc.: IEEE a Submission Slide 9 Jason Ellis, Staccato Communications Likely n Receiver Shown with 2 RX antennas channel decoder

January 2004 doc.: IEEE a Submission Slide 10 Jason Ellis, Staccato Communications Contributions Related to FRCC Throughput vs. Range Curves, r0 (to be presented in subgroup) Point to point sim. …, r0, Bjerke (to be presented in subgroup) Time correlated packet errors in a MAC simulation, r0, Vlantis (to be presented in subgroup) Proposal for statistical channel error model (UCLA), r1, Vlantis (to be presented in subgroup) Considerations for STS for MIMO-OFDM, r2, Rosdahl, 30 minutes New preamble structure for AGC in a MIMO-OFDM system, r1, Aoki, 15 minutes The sensitivity of performance to antenna element spacing when using n channel model, r1, Takeda, 15 minutes Comments on Ergodic and Outage Capacity, r2, Choi, 15 minutes Capacity of MIMO systems as a function of antenna parameters, r0, Skafidas, 25 minutes Japanese Frequency Regulations Related to TGn Functional Requirements, r0, Inoue, 15 minutes PHY Abstraction for MAC Simulation, TBD, Jechoux, 30 minutes

January 2004 doc.: IEEE a Submission Slide 11 Jason Ellis, Staccato Communications Contributions Not related to FRCC –Practical MIMO Arch. …, r0, Moon, 30 minutes (Tuesday or later presentation) –Thoughts on TX Spectral Mask, r0, Hansen, 20 minutes –Different Channel Codes for n, r0, Ten Brink, 20 minutes – r2, Choi, 35 minutes –Parallel Sequence Spread Spectrum (PSSS), r0, Wolf, 20 minutes (Tuesday or later) –LDPC vs. Convolutional Codes, r0, Purkovic, 25 minutes –Low Overhead …, r0, Faulkner, 15 minutes – r0, Edmonston, 12 minutes –TGn Channel Models, r2, Lanzl, 5 minutes – Pros and cons …, r0, 20 minutes (Must be presented before Thursday) –The Performance of RS Codes in MIMO, TBD, Pen Li, 15 minutes