188宝金博页面版

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188宝金博页面版: Multiuser MIMO Downlink Transmission Schemes over Time-Varying Channels

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内容提示: T S I N G H U AS C I E N C EA N DT E C H N O L O G YI S S N 10 0 7 - - 0 2 14 0 5/18p p 7 6 9 ??7 7 7V o lu m e 13 , N u m b e r 6 , D e c e m b e r2 0 0 8M u ltiu serM I M OD o w n lin kT r a n sm issio nS c h e m e s o v e rT im e . V a r y in gC h a n n e ls事W A N GH o n g m e i( 王红梅), X UX ib in ( 许希斌), Z H A OM in g ( 赵明),Z H O US h id o n g ( 周世东), Y A OY a n ( 姚彦)”T sin g h u aN a tio n a lL a b o r a to r yf o rIn f o r m a tio nS c ie n c ea n dT e c h n o lo g y ,D e p a r t m e n to fE le c tr o n icE n g in e e r in g , T sin g h u aU n iv ersity , B eijin g10 0 0 8 4 , C h in aA b str a c t: T h ep e r f o r m a n c eo f m u ltiu se rm u ltip le—in p u t- m u ltip le- o u tp u t( M IM O )d o w n lin ksy st e m sw ith b lo ckd ia g o n a Iiz a t. o n ( B D )d ep en d so n th ea c c u r a c yo f th ec h a n n e l sta tein f o rm a tio n ( C S l)a v a ila b lea t th e tr a n s—m ittera n dth e r e c e iv e r . Intim e—v a ry in gc h a n n e ls, th eC S I a v a ila b le a t th etra n sm itter( C S IT )is a lw a y so u t-d a t e dd u etoa n in h e r e n t tim ed e la yb e t w e e nth eu p lin kc h a n n e l e stim a tio n a n dth ed o w n lin k d a tatr a n sm is-sio n in tim ...

文档格式:PDF | 页数:9 | 浏览次数:7 | 上传日期:2015-04-14 00:30:45 | 文档星级:
T S I N G H U AS C I E N C EA N DT E C H N O L O G YI S S N 10 0 7 - - 0 2 14 0 5/18p p 7 6 9 ??7 7 7V o lu m e 13 , N u m b e r 6 , D e c e m b e r2 0 0 8M u ltiu serM I M OD o w n lin kT r a n sm issio nS c h e m e s o v e rT im e . V a r y in gC h a n n e ls事W A N GH o n g m e i( 王红梅), X UX ib in ( 许希斌), Z H A OM in g ( 赵明),Z H O US h id o n g ( 周世东), Y A OY a n ( 姚彦)”T sin g h u aN a tio n a lL a b o r a to r yf o rIn f o r m a tio nS c ie n c ea n dT e c h n o lo g y ,D e p a r t m e n to fE le c tr o n icE n g in e e r in g , T sin g h u aU n iv ersity , B eijin g10 0 0 8 4 , C h in aA b str a c t: T h ep e r f o r m a n c eo f m u ltiu se rm u ltip le—in p u t- m u ltip le- o u tp u t( M IM O )d o w n lin ksy st e m sw ith b lo ckd ia g o n a Iiz a t. o n ( B D )d ep en d so n th ea c c u r a c yo f th ec h a n n e l sta tein f o rm a tio n ( C S l)a v a ila b lea t th e tr a n s—m ittera n dth e r e c e iv e r . Intim e—v a ry in gc h a n n e ls, th eC S I a v a ila b le a t th etra n sm itter( C S IT )is a lw a y so u t-d a t e dd u etoa n in h e r e n t tim ed e la yb e t w e e nth eu p lin kc h a n n e l e stim a tio n a n dth ed o w n lin k d a tatr a n sm is-sio n in tim e d iv isio nd u p lex in g ( T D D )sy stem s. T h isle a d s to a d r a sticd e g r a d a tio no fsy ste mc a p a c ity . T h isp a p e rfirst a n a ly z e sth e ef f ect o f th e o u td a te d C S I T o n m u ltiu se r M I M Od o w n lin ksy ste m s u sin gth e B Dm e th o da n dth e np r o p o se st w olin e a rp r o c e ssin gm e t h o d s。 B Dp r e c o d in gw ithu s e r se le c tio na n dsc h e d u lin ga tth e tr a n sm itte ra n d to ta lm in im u m m e a n sq u a r e d e r r o r ( M M S E )d e c o d in g a tth e receiver( T B D U S S —R T M M S E )a n dB Dp r e c o d in g a t th e tr a n sm itte r w ith p a r tia l M M S Ed e c o d in g a t th e r e c e iv e r( T B D - R P M M S E ), to m itig a teth e in te r f e r e n c ea m o n gd a ta str e a m s a n du se r s. A n a ly sisa n dsim u la tio n re—su its sh o wth a t th e se m e t h o d sc a ne f f e c tiv e lyr e d u c e th eim p a ir m e n to f th e o u td a te d C S ITto in c r e a se th esy ste ms u mc a p a c ityin a su ita b le tim ed e la yr e g io no fth e C S IT .K e yw o r d s: m u ltiu se rm u ltip le—in p u t- m u ltip le- o u tp u t( M IM O )d o w n lin ksy ste m ; tim e - v a ty in gw ir e le ss c h a n n e l;o u td a te dc h a n n e I sta tein f o r m a tio n ; m in im u mm e a nsq u a r e de r r o r ( M M S E )In tr o d u c tiO nM u ltiu serm u ltip le—in p u t—m u ltip le?o u tp u t( M IM O )sy s?te m s h a v eg r a d u a lly g r a sp e dm o r e r e se a r c h in terest■sin c e w ithm u ltip le tr a n sm ittin ga n t e n n a s a t th e tr a n s—m itte r ,n o e x tr a tim e slo tso rf r e q u e n c yr e s o u r c e sa r en e e d e d tosu p p o r t m u ltip leu se r s. R e c e n t th e o r e tic r e -su itsl2- 6j h a v e in d ic a te dth a t th e su mc a p a c ityo fm u lti—u s e r M I M 0d o w n lin k c h a n n e ls c a ll b e a c h ie v e du sin gR e c e iv e d : 20 0 7 - 0 7 - 20 ; r e v ise d : 20 0 7 - 12- 16?S u p p o r te d b yth e N a tio n a l H ig h —T ech R e se a r c h a n dD e v e lo p m e n t( 8 6 3)P r o g r a mo fC h in a ( N o . 20 0 6 A A 0 1228 2)a n dth eT sin g h u a ?Q u a lc o m mP ro ject●●T ow h o mco rresp o n d en cesh o u ldb ea d d ressed .E —m a il: y a o y @ tsin g blla . ed u . o n ; T el: 86—10—627 8i396d in y —p a p e rco d in g ( D P C )¨ 1a tth etr a n sm itte r . H o w e v e r ,D P Cis d if f icu lt toim p le m e n tinp ra ctica l sy ste m sd u eto th eh ig h c o m p u m tio n a lb u r d e n o f th e su c c e ssiv ee n c o d in ga n dd e c o d in g . Ar e d u c e dco m p le x itysc h e m en a m e dz er o ?f o r cin g D P C ( Z F D P C )is p ro p o sed ⅢJ. Itu s e s O Rd e c o m p o sitio nc o m b in e d w ith D P C a t th etra n sm itter too p tim iz eth e su mc a p a c itya n dp r o v id e sp e r f o r m a n c e v e r y c lo se to th e S a to bo u n d 【…. bu t itsco m p le x ityis still v e r y h ig h . Alo w - c o m p le x itylin ea rsu b o p tim a l str a te g yz er o —f o r cin g b e a m f o r m in g ( Z F B F )sc h e m e isp r o p o se d l…1a n d C a ll s e r v em u ltip leu s e r se a c he q u ip p e dw ith asin g le r e c e iv in ga n t e n n a a t a tim elik eD P C . W h e n u s e r s h a v em u ltip lea n te n n a s. b lo c kd ia g o n a liz a tio n f B D )¨ l,lg JiS a n e硒cien t m e th o d too p tim iz eth esu mca p a city .T h ep r e v io u sw o r k is b a se d o n th ea ssu m p tio nth a t 万方数据

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