1. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Multipath Channel Modeling for 60GHz Frequency Band] Date Submitted: [16 January, 2006] Source: [Wooyong Lee, Kyeongpyo Kim, Jinkyeong Kim, and Yongsun Kim] Company [ETRI] Address [161 Gajeong-dong, Yuseong-gu, Daejeon, 305-700, Korea] Voice:[+82 42 860 6105], FAX: [+82 42 869 1712], E-Mail:[ wylee@etri.re.kr] Re: [] Abstract:[Description of 60GHz Frequency Band Multipath Channel Modeling.] Purpose:[Contribution to TG3c at January 2006 Interim meeting.] 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. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 2 Multipath Channel Modeling for 60GHz Frequency Band Wooyong Lee, Kyeongpyo Kim, Jinkyeong Kim, and Yongsun Kim ETRI January 17, 2006

3. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 3 Overview We introduce two analytical multipath channel models for 60 GHz frequency band Static Channel Model –Time-invariant TDL model –Simple model Fading Channel Model –Time-variant TDL model –Preferred for baseband simulations –In LOS case, first tap has K=13.07dB Ricean factor

4. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 4 Millimeter waves (60GHz) are strongly attenuated and oxygen molecule absorption –10-meter loss of 60GHz band electromagnetic signal is equivalent to the 30km loss of 1GHz band –Absorption: order of 10~15dB/km The wireless channels are characterized by path loss model and small scale fading model –Path loss model is very useful to predict proper ranges of SNR over the distances between Tx and Rx –Small scale fading model is usually exploited to stamp the wideband characteristics 60GHz Channel Characteristics

5. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 5 Path loss model (H. Xu, JSAC’02) –Free space loss equation Power budget at 60GHz, =5mm, the attenuation due to propagation is –68dB at 1 meter –88dB at 10 meter Conventional 60GHz Channel Model

6. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 6 Experimental result on path loss (H. Xu, JSAC’02) 60GHz Channel Path Loss Results

7. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 7 Path Loss and Coverage Analysis (1/3) Keenan-Motley model Correia model The radiation pattern of the measurement antennas was narrow (3dB beamwidth 5  ) in the vertical plane and broad (9  ) in the horizontal plane.

8. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 8 Path Loss and Coverage Analysis (2/3) Parameters for coverage analysis Maximum acceptable path loss: –Tx/Rx cable loss and H/W implementation loss are ignored ParameterValue Max. EIRP(P EIRP =P Tx + G Tx )20 dBm Transmit Power+Tx Antenna Gain+Tx Cable Loss Shadowing Fade Margin (M)0/5/10 dB Rx. Antenna Gain (G Rx )0 dBi Noise Figure (NF)9 dBTypical 5-9 dB Noise PSD (N0)-165 dBm/Hz120MHz BW Receive Sensitivity (P th ) BPSK-77.48 dBm Receive Sensitivity @ Uncoded BER10 -3 QPSK-74.46 dBm 16QAM-67.76 dBm 64QAM-61.70 dBm

9. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 9 Path Loss and Coverage Analysis (3/3) Coverage Analysis: Uncoded Case

10. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 10 Saleh and Valenzuela model (JSAC’87) –Multipath components arrive in clusters –Cluster arrival times are modeled as a Poisson arrival process with fixed rate  –In each cluster, multipath components arrive according to Poisson process with another fixed rate  –But, complex for baseband simulations Impulse Response Channel Model

11. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 11 Deterministic frequency selective model (Hübner, VTC’97) Modeled by a conventional time invariant FIR filter structure Typical indoor wireless LAN application scenarios with an RF bandwidth of 200 MHz and 62 GHz center frequency The scenarios represent the line of sight (LOS) and non-line of sight (NLOS) case where omni-directional antennas are used for both transmit and receive side

12. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 12 Channel Simulator for 60GHz band (1/2) Indoor propagation environment –LOS channel Peak-to-peak power difference in the frequency domain –NLOS channel Peak-to-peak power difference in the frequency domain

13. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 13 Channel Simulator for 60GHz band (2/2) Slow Mobility –Static Channel Simulator for 60GHz Time-invariant TDL model When taps have factional delays, then this delay will be rounded by the nearest multiple of the sampling frequency Random phase rotation of original CIR in order to generate independent CIR –Fading Channel Simulator for 60GHz Jakes classical Doppler(U-shape) spectrum When taps have factional delays, then this delay will be rounded by the nearest multiple of the sampling frequency In LOS case, first tap has K=13.07dB Ricean factor

14. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 14 Simulator for Static Channel Model (1/2) Proposed by Hübner (VTC’97) Time-invariant TDL structure Uniform random phase rotation of complex CIR in order to generate multiple independent channel in [0, 2  ) range  initial seed value LOS CaseNLOS Case Relative Delay Time [ns] Complex Channel Coefficient Note Relative Delay Time [ns] Complex Channel Coefficient Note 00.4502302+0.86621991jRandom Phase00.194008+0.37325832jRandom Phase 15-0.00118146+0.03175096jRandom Phase15-0.00494651+0.13293465jRandom Phase 20-0.11530161-0.13648934jRandom Phase20-0.48274379-0.57145242jRandom Phase 35-0.0297353-0.01119513jRandom Phase35-0.12449552-0.04687168jRandom Phase 40-0.01073347+0.02990505jRandom Phase40-0.04493882+0.12520619jRandom Phase 450.10021063+0.00728164jRandom Phase450.419656101+0.03048672jRandom Phase 55-0.00792121-0.01556035jRandom Phase55-0.03316445-0.06514792jRandom Phase 700.02800481-0.02856065jRandom Phase700.1172503-0.11957749jRandom Phase

15. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 15 Simulator for Static Channel Model (2/2) Example (BW:120MHz) Modified static channel model is adjusted at 120MHz BW NLOS channel LOS channel Impulse

16. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 16 Fading Channel Simulator for 60GHz Band LOS CaseNLOS Case Relative Delay Time [ns] Average relative Power [dB] Ricean factor, K [dB] Doppler Spectrum Relative Delay Time [ns] Average relative Power [dB] Ricean factor, K [dB] Doppler Spectrum 0013.07Class+spike00-Class 15-29.75-Class15-10-Class 20-14.75-Class205-Class 35-29.75-Class35-10-Class 40-29.75-Class40-10-Class 45-19.75-Class450-Class 55-34.75-Class55-15.2-Class 70-27.75-Class70-8-Class

17. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 17 Summery for 60 GHz Multipath Channel Modeling We propose two multipath channel models for 60 GHz frequency band Static channel simulator uses complex coefficients (very simple) Fading channel simulator (Ricean model) for time-variant model uses power profiles Option: Doppler spectrum of fading channel uses Jakes model Above two multipath channel models are sufficient for 60GHz Channel modeling

18. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 18 References [1] Shahriar Emami, Abbie Mathew and Zhiguo Lai, “60 GHz Channel Modeling Simulation Work for Indoor Environment,” IEEE802.15- 05/0255r0, May 2005. [2] J. Foester, “Channel Modeling Sub-committee Report (Final),” IEEE 802.15-02/490r1, Feb. 2003. [3] H. Xu, V. Kukshya, and T. S. Rappaport, “Spatial and temporal characteristics of 60-GHz indoor channels”, IEEE J. Select. Areas Commun., vol. 20, no. 3, pp. 620-630, Apr. 2002. [4] J. Hubner, S. Zeisberg, K Koora, J. Borowski, A. Finger, “Simple channel model for 60 GHz indoor wireless LAN design based on complex wideband measure-ments”, Proc. VTC, 1997, pp. 1004-1008. [5] A. A. M. Saleh and R. A. Valenzuela, “A Statistical model for indoor multipath propagation,” IEEE J. Select. Areas Commun., vol. 5, No. 3, pp. 128-137, Feb. 1987.

19. doc.: IEEE 802.15-06/0038r1 TG3c Presentation 2006-01-17 Wooyong Lee – ETRISlide 19 Thank you!