doc.: IEEE /0038r1 TG3c Presentation Wooyong Lee – ETRISlide 1 Project: IEEE P 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, , Korea] Voice:[ ], FAX: [ ], [ 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 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

doc.: IEEE /0038r1 TG3c Presentation Wooyong Lee – ETRISlide 2 Multipath Channel Modeling for 60GHz Frequency Band Wooyong Lee, Kyeongpyo Kim, Jinkyeong Kim, and Yongsun Kim ETRI January 17, 2006

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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

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

doc.: IEEE /0038r1 TG3c Presentation 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.

doc.: IEEE /0038r1 TG3c Presentation 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 dBm Receive Uncoded BER10 -3 QPSK dBm 16QAM dBm 64QAM dBm

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

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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 jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase jRandom Phase

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation 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 Class+spike00-Class Class15-10-Class Class205-Class Class35-10-Class Class40-10-Class Class450-Class Class Class Class70-8-Class

doc.: IEEE /0038r1 TG3c Presentation 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

doc.: IEEE /0038r1 TG3c Presentation Wooyong Lee – ETRISlide 18 References [1] Shahriar Emami, Abbie Mathew and Zhiguo Lai, “60 GHz Channel Modeling Simulation Work for Indoor Environment,” IEEE /0255r0, May [2] J. Foester, “Channel Modeling Sub-committee Report (Final),” IEEE /490r1, Feb [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 , Apr [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 [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 , Feb

doc.: IEEE /0038r1 TG3c Presentation Wooyong Lee – ETRISlide 19 Thank you!