Harlow, Essex, CM17 9NA

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1 Preliminary Discussion on Taped-Delay-Line Based MIMO Cannel Model Documen Number: Dae Submied: Source: Dean Kicener, Mark Naden Voice: Norel Fax: London Road Harlow, Essex, CM7 9NA Wen Tong, Peiying Zu, Voice: Gamini Senarna, Hang Zang, David Seer, Derek Yu wenong@norel.com pyzu@norel.com Norel, 500 Carling Avenue Venue: IEEE 80.6 Session #44, San Diego, USA Base Documen: C806j-06_040: Muli-op Sysem Evaluaion Meodology Cannel Model and Performance Meric Purpose: To discuss e probabiliy assignmen for RS above and below roofop and e sandard deviaion of lognormal sadowing disribuion Noice: Tis documen as been prepared o assis IEEE I is offered as a basis for discussion and is no binding on e conribuing individuals or organizaions. Te maerial in is documen is subjec o cange in form and conen afer furer sudy. Te conribuors reserves e rig o add, amend or widraw maerial conained erein. Release: Te conribuor grans a free, irrevocable license o e IEEE o incorporae maerial conained in is conribuion, and any modificaions ereof, in e creaion of an IEEE Sandards publicaion; o copyrig in e IEEE s name any IEEE Sandards publicaion even oug i may include porions of is conribuion; and a e IEEE s sole discreion o permi oers o reproduce in wole or in par e resuling IEEE Sandards publicaion. Te conribuor also acknowledges and acceps a is conribuion may be made public by IEEE IEEE 80.6 Paen Policy: Te conribuor is familiar wi e IEEE 80.6 Paen Policy and Procedures <p://ieee80.org/6/ipr/paens/policy.ml>, including e saemen "IEEE sandards may include e known use of paens, including paen applicaions, provided e IEEE receives assurance from e paen older or applican wi respec o paens essenial for compliance wi bo mandaory and opional porions of e sandard." Early disclosure o e Working Group of paen informaion a mig be relevan o e sandard is essenial o reduce e possibiliy for delays in e developmen process and increase e likeliood a e draf publicaion will be approved for publicaion. Please noify e Cair <mailo:cair@wirelessman.org> as early as possible, in wrien or elecronic form, if paened ecnology or ecnology under paen applicaion mig be incorporaed ino a draf sandard being developed wiin e IEEE 80.6 Working Group. Te Cair will disclose is noificaion via e IEEE 80.6 web sie <p://ieee80.org/6/ipr/paens/noices>.

2 Inroducion and Background Full Spaial Cannel Models SCM is available for sysem level simulaion Wi narrow band limiaion max 5MHz Very complicaed for generaion and excessive run ime is required Simplified Taped-Delay-Line MIMO cannel model can be employed For bo link level and sysem simulaions We discuss e MIMO cannel generaion meod Independen MIMO cannel generaion Correlaed MIMO cannel generaion

3 Meodology A apped-delay-line based MIMO model is used for link level performance evaluaion I is a simplified MIMO propagaion cannel model Te link level propagaion aspecs are capured by impulse response model E.g. ITU cannel model for narrow band 5MHz cannel Te independen muliple Rayleig faders are employed Li-Hung model Te MIMO-anenna /MIMO-cannel correlaion aspecs are capured by correlaion facor

4 Cannel Model-Time Srucure ime 0 Tap- Tap- Tap-n Delay- Delay- Delay-n 4, 4,,,,,,, H 4, 4,,,,,,, H 4, 4,,,,,,, H n Tapped delay line model

5 ITU Cannel Model Parameers Examples ITU cannel models Tap Relaive Delay ns OIP-A OIP-B V-A Average Power db Relaive Delay ns Average Power db Relaive Delay ns Average Power db Doppler specrum Classic Classic Classic Classic Classic Classic Need o improve ITU model o wider bandwid cannel more an 6 aps 5

6 Correlaed MIMO Cannel Model RX TX L U Form receiver correlaion 4 44 Independen Complex Gaussian Samples 4 Form ransmier correlaion R R R T LL H UU H L is lower riangular Colesky RX correlaion U is upper riangular Colesky TX correlaion * We assume e receive anennas are uncorrelaed 6

7 Correlaed MIMO Cannel Model # of ransmi anennas Low Hig R

8 Generaion of Correlaed MIMO Cannel Model STEP-: Specify e number of ransmi anennas N T and e number of receive anennas N R. STEP-: Selec a apped delay line model for e cannel dispersion, were is is applied o all of e N T xn R MIMO pa. STEP-: Apply an iindependen complex Gaussian sample o eac ap on eac MIMO pa o form H. Te H is consruced in suc a way a e correlaion beween any pair of fading aps will be zero. Consequenly, e correlaion marix for every ap posiion will simply be an ideniy marix STEP-4: Specify a correlaion marix for eac ap posiion. STEP-5: Perform a Colesky facorizaion of e correlaion marix R, suc a R can be represened as R UU H. STEP-6: Te uncorrelaed aps a a given delay posiion can en be correlaed by muliplying e uncorrelaed H by e ransform marix H C HU. 8

9 Summary and Discussion Simplified MIMO cannel model is discussed Based on Taped-delay-line model Cannel model exension o for wideband is required Cannel model and associaed correlaion facors are required for e MMR links BS-RS, RS-RS, BS-MS, RS-MS 9