IEEE C802.16e-04/509r4. STC sub-packet combining with antenna grouping for 3 and 4 transmit antennas in OFDMA
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1 Project Ttle Date Submtted IEEE 80.6 Broadband Wrele Acce Workng Group <http//eee80.org/6> STC ub-packet combnng wth antenna groupng for and tranmt antenna n OFDMA Source Bn-Chul Ihm Yongeok Jn Jnyoung Chun LG Electronc Inc. 5Hogye-dong Dongan-gu Anyang-h Kyongk-do Korea Voce Fax [malto {bchm jayjay jychun0}@lge.com] Ran Yanv Tal Katz Alvaron Ltd. [malto{ran.yanv tal.katz@alvaron.com} Re Abtract Purpoe Notce Releae Patent Polcy and Procedure Th a repone to a Call for Comment on IEEE P80.6e-D5a STC ub-packet combnng cheme can be appled wth adaptve antenna groupng n OFDMA. The reved text n pnk color. Th document ubmtted for revew by 80.6e Workng Group member Th document ha been prepared to at IEEE It offered a a ba for dcuon and not bndng on the contrbutng ndvdual or organzaton. The materal n th document ubject to change n form and content after further tudy. The contrbutor reerve the rght to add amend or wthdraw materal contaned heren. The contrbutor grant a free rrevocable lcene to the IEEE to ncorporate materal contaned n th contrbuton and any modfcaton thereof n the creaton of an IEEE Standard publcaton; to copyrght n the IEEE name any IEEE Standard publcaton even though t may nclude porton of th contrbuton; and at the IEEE ole dcreton to permt other to reproduce n whole or n part the reultng IEEE Standard publcaton. The contrbutor alo acknowledge and accept that th contrbuton may be made publc by IEEE The contrbutor famlar wth the IEEE 80.6 Patent Polcy and Procedure <http//eee80.org/6/pr/patent/polcy.html> ncludng the tatement "IEEE tandard may nclude the known ue of patent ncludng patent applcaton provded the IEEE receve aurance from the patent holder or applcant wth repect to patent eental for complance wth both mandatory and optonal porton of the tandard." Early dcloure to the Workng Group of patent nformaton that mght be relevant to the tandard eental to reduce the poblty for delay n the development proce and ncreae the lkelhood that the draft publcaton wll be approved for publcaton. Pleae notfy the Char <maltochar@wreleman.org> a early a poble n wrtten or electronc form f patented technology or technology under patent applcaton mght be ncorporated nto a draft tandard beng developed wthn the IEEE 80.6 Workng Group. The Char wll dcloe th notfcaton va the IEEE 80.6 web te <http//eee80.org/6/pr/patent/notce>. 0
2 STC ub-packet combnng wth antenna groupng for and tranmt antenna n OFDMA Bn-chul Ihm Jnyoung Chun and Yongeok Jn LG Electronc. Introducton. STC ubpacket combnng In OFDMA of the current 80.6 tandard STC ub-packet retranmon cheme for and -antenna patal multplexng cheme are provoned n ecton ' STC ub-packet combnng'. Th cheme gve the effcent retranmon n the low moblty becaue the par of tranmt antenna cont of STTD tructure. Receved gnal wth the ntal and retranmon packet are wrtten a follow v H x v H x retx retx retx nt nt where [ ] retx for tx antenna and [ ] retx for tx antenna a hown n table 5m and 5n. In the current pecfcaton the retranmon ubpacket ha a fxed form a above however retranmon ubpacket format adaptaton accordng to channel condton can mprove the ytem performance. There are two more alternatve retranmon format n and tranmt antenna ytem a follow For tranmt antenna ytem Alternatve Alternatve Default For tranmt antenna ytem Alternatve Alternatve Default For tranmon antenna default retranmon ub-packet and ntal tranmon ub-packet cont of STTD tructure wth antenna and antenna alternatve and ntal ub-packet form STTD tructure wth antenna and antenna and alternatve and ntal ub-packet cont of STTD tructure wth antenna and antenna a hown n Fgure. For tranmon antenna there are ame prncple a hown n Fgure.
3 a default b alternatve c alternatve Fgure. STTD tructure n each alternatve for tx antenna a default b alternatve c alternatve Fgure. STTD tructure n each alternatve for tx antenna Recever can elect one of three alternatve and then feedback to the tranmtter for retranmon cheme adaptaton. There no addtonal overhead to upport the propoed retranmon cheme a hown n Fgure. a Current retranmon cheme b Propoed retranmon cheme Fgure. Current cheme and propoed cheme BS MSS NACK BS MSS NACK wth one of three alternatve or or
4 . ACK/NACK Sgnalng wth alternatve To end back one of alternatve wth NACK gnal t requred to add the two value to current ACK/NACK value. Then there are four value ndcatng ACK NACK NACK wth alternatve and NACK wth alternatve.. Propoed Text Change [Modfy Table 5m and Table 5n n ecton STC ubpacket combnng] Table 5m STC ubpacket combnng tranmt antenna cae Intal tranmon Odd re-tranmon Even re-tranmon Space tme code ncremental redundancy for matrx C 0 S S odd Default S odd Alternatve S odd Alternatve S even Table 5n STC ubpacket combnng tranmt antenna cae Intal tranmon Odd re-tranmon Even re-tranmon Space tme code ncremental redundancy for matrx C 0 S S odd Default S odd Alternatve S odd Alternatve S even
5 [Apply the followng nto the Optonal Enhanced UL ACK channel] Optonal Enhanced UL ACK channel The uplnk ACK Acknowledgement provde feedback for Downlnk Hybrd ARQ. Th channel hall only be upported by MSS upportng H-ARQ. The MSS tranmt ACK or NAK feedback for Downlnk packet data. One ACK channel occupe a half ubchannel whch pece of a x uplnk tle n the cae of optonal PUSC or pece of a x uplnk tle n the cae of PUSC. The acknowledgement bt of the n-th ACK channel hall be '0' ACK`ACK f the correpondng downlnk packet ha been uccefully receved; otherwe t hall be '' NAK`NAK. Th bt acknowledgement encoded nto a length codeword over an 8-ary alphabet for the error protecton a hown n Table 98c. Table 98c-ACK channel ubcarrer modulaton ACK -bt Symbol Vector Indce per Tle Tle0 Tle Tle ACK 000 NACK Default for H-ARQ modegenerc NACK wth alternatve f H-ARQ modegenerc NACK wth alternatve f H-ARQ modegenerc Smulaton reult In the mulaton we ued convolutonal code / QPSK ymbol tranmt and receve antenna n band-amc mode. A hown n Fgure the propoed cheme gve the performance gan about.5db over the current STC combnng cheme at BLER 0 -. Th gan hold when delay frame a hown n Fgure 5.
6 .00E00 band AMC mode CC / QPSK Ped_A km/h.00e-0 BLER.00E-0.00E-0 Chae Combne STC combneonly opton Propoed.00E SNRdB Fgure. Performance comparon n Ped_Akm/h wth delay frame.00e00 band-amc mode CC / QPSK Ped_A km/h.00e-0 BLER.00E-0.00E-0 Chae Combnng STC Combnng Propoed.00E SNRdB Fgure 5. Performance comparon n Ped_Akm/h wth delay frame 5
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