1. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Chaotic Communication System Proposal] Date Submitted: [4 January, 2005] Source: [Hyung Soo Lee (1), Cheol Hyo Lee (1), Dong Jo Park (2), Dan Keun Sung (2), Sung Yoon Jung (2), Chang Yong Jung (2), Joon Yong Lee (3)] Company [(1) Electronics and Telecommunications Research Institute (ETRI) (2) Korea Advanced Institute of Science and Technologies (KAIST) (3) Handong Global University (HGU)] Address [(1) 161 Gajeong-dong, Yuseong-gu, Daejeon, Republic of Korea (2) 373-1 Guseong-dong, Yuseong-gu, Daejeon, Republic of Korea (3) Heunghae-eup, Buk-gu, Pohang, Republic of Korea] Voice :[(1) +82 42 860 5625, (2) +82 42 869 5438, (3) +82 54 260 1931], FAX: [(2) +82 42 869 8038] E-Mail: [(1) hsulee@etri.re.kr, (2) syjung@kaist.ac.kr, (3) joonlee@handong.edu] Abstract:[The Chaotic Communication System is proposed for the alternative PHY for 802.15.4a] Purpose:[This submission is in response to the committee’s request to submit the proposal enabled by an alternate 802.15 TG4a PHY] 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.

2. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 2 Chaotic Communication System Proposal

3. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 3 PHY Frame Structure Frame Structure of PPDU PreambleSFDPHRPSDU : # of bits per data block : Orthogonal code length : # of repetitions : Pulse bin width (duration) : Total transmit time duration of a data block : Guard time for processing delay : Multi-coded chip duration : Multi-coded symbol duration : # of Repetitions : Code length : Position number for BPPM

4. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 4 MC-PPM Operation Concept (e.g. L=3, Ns=4, Nr=1, Tg=0 ns) Data block ( L bits ) Ex. L=3 Orthogonal code set ( Code Length : Ns ) Ex. Ns=4 Modulation Multi-coded symbol ( Code rate : L/Ns ) Ex. Code rate = 3/4 1-311 PPM : 1 1 1 1 11 1 1 1 1 11 1 1 11-31

5. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 5 MC-PPM (Cont’d) Tg = 0 Tm=200nsec, Ton=20nsec Bit rate : 1kbps –L=3, Ns=8, Nr=1 [Td=Td_on+Td_off=(L+1)*Ns*Tm+467+Td_on] –L=3, Ns=16, Nr=1 [Td=Td_on+Td_off=(L+1)*Ns*Tm+467+Td_on] Tm Ton

6. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 6 Transmitter Receiver Transceiver Architecture Data Modulator Bi-phase PPM Channel Data Encoder Orthogonal Multi-code Data Pulse Generator Data Decoder Orthogonal Multi-code Data DeModulator Bi-phase PPM Data Pulse Generator Location Detector

7. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 7 Signal Robustness Proposed Operating Bandwidth : 3-5GHz Operating Bands for Pre-existing Services –IEEE 802.15.1 -> 2.4GHz Band –IEEE 802.11b,g -> 2.4GHz Band –IEEE 802.11a -> 5 GHz Band Interference and Coexistence Problems with Pre-existing Services –The operating bandwidth is occupying different band compared to pre-existing services

8. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 8 PHY-SAP Payload Bit Rate and Data Throughput PHY HEADER MPDU = PSDU T preamble T header PPDU PHY PREAMBLE MHR (Frame Control +Seq. Num +Addr Fields) MSDU (Data payload) MFR (FCS)

9. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 9 PPDU Structure FCS (Frame Check Sequence) –16 bit ITU-T CRC –Calculated over the MHR and MAC payload part –X16+x12+x5+1 Preamble –Use 4 bytes For further performance improvements, the size and preamble pattern will be defined

10. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 10 Simultaneously Operating Piconets (SOP) Time Division –Operating bandwidth 3.1-4.9 GHz can be fully used (UWB pulse) –Configuration of SOPs Self configuration of SOPs is possible by modified passive scan Piconet #1 ActiveInactive Piconet #2 Piconet #3

11. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 11 Modified Passive Scan Usages –Starting a new PAN (FFD) –Association (FFD or RFD) Channel Scan –Modify passive scan procedures (IEEE 802.15.4 spec.) –Repeat scanning one channel (3-5 GHz) until correctly receiving beacons from each piconet coordinator Get the information of piconets –Timing information, system parameters, and etc… Operations of Coordinator and Device –Prior to starting a new PAN (FFD) Transmit its own beacon –Prior to association (FFD or RFD) Associate with a desired piconet coordinator

12. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 12 Modified Passive Scan (Cont ’ d)

13. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 13 Non-coherent Chaotic Synchronization Procedure –Assume N_int square-law integrators –Divide T_m time into total N_int time slots (each time slot contains T_m/N_int time) –t_s : sync. starting point / t_sync : exact sync. point preamble Chaotic Synchronization

14. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 14 Non-coherent Chaotic Synchronization Procedure –The output value of n-th square-law integrator –Estimated Sync. Point Chaotic Synchronization (Cont’d)

15. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 15 Chaotic Synchronization Parameters –Pseudo Chaotic Pulse [BW=2GHz(3G-5GHz), Tp=20ns] –Preamble Length 32 Bytes (1 Bytes = 8 Chaotic Pulses) Tm=200ns, Ts=100ns (Ts=Ns*Tp -> Ns=5) Preamble Time Duration = 5.2us –Number of Integrators (Nint) = 10 In HW Implementation, 5 Integrators can considered Relative Preamble Length = 32 Bytes/(Nint/5)=16 Bytes –Synchronization Resolution [Tm/(2*Nint)] = 10ns Chaotic Synchronization (Cont’d)

16. Jan. 2005 doc.: IEEE 802. 15-05-0010-00-004a H. Lee, C. Lee, D. Park, D. Sung, S. Jung, C. Jung and J. Lee Submission Slide 16 Link Budget Parameter(mandatory) Value (mandatory) Value peak payload bit rate : R b 1 kb/s [L=3,Ns=8]1 Kb/s [L=3,Ns=16] Average Tx power :-8.75 (dBm)-8.75dBm Tx antenna gain :0 (dBi)0 dBi : geometric center frequency of waveform ( and are the -10 dB edges of the waveform spectrum) 3.87 (GHz) Path loss at 1 meter : cf)44.5 dB Path loss at d m : 29.54 dB at d=30 meters20 dB at d=10 meters Rx antenna gain :0 (dBi) Rx power :-82.79 (dBm)-73.25 (dBm) Average noise power per bit : -107 (dBm) Rx Noise Figure : 7 (dB) Average noise power per bit :-100 (dBm) Minimum Eb/N0 (S)24.2-16=8.2 (dB)23.2-16=7.2 (dB) Implementation Loss (I)3 (dB) Link Margin :6 (dB)15.6 (dB) Proposed Minimum Rx Sensitivity Level-88.8 (dBm)