IEEE Broadband Wireless Access Working Group < An Enhanced MIMO Transmission Scheme for OFDMA Systems

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1 IEEE C80.6e-0/5r Project Title IEEE 80.6 Broadband Wirele Acce Working Group < An Enhanced MIMO Tranmiion Scheme for OFDMA Sytem Date Submitted Source() Seong Keun Oh, Moon Il Lee, Ki Bum Kwon, Heegoo Han Ajou Univerity, San 5, Wonchon-Dong, Yeongtong-Gu, Suwon, -79, Korea Seung Joon Lee, Choong Il Yeh, Hyoung Soo Lim, In Kyeong Choi, Jong Ee Oh, Kwang Jae Lim, Seong Rag Kim, Young Seog Song, Yu Ro Lee, Dong Seung Kwon, Seung Ku Whang ETRI 6 Gajeong-dong, Yueong-gu, Daejeon, Korea Re: Contribution upporting TGe WG ballot #c Abtract Purpoe Notice Releae Patent Policy and Procedure mail to: okn@ajou.ac.kr Voice: mail to:.j.lee@etri.re.kr Voice: Thi document include a novel STC cheme that can provide the full-rate full-diverity with a greater coding gain than the exiting STC cheme for cellular OFDMA ytem. The propoed cheme i applicable to the DL xn (n ) antenna cae. Adoption of propoed change into P80.6e Thi document ha been prepared to ait IEEE It i offered a a bai for dicuion and i not binding on the contributing individual() or organization(). The material in thi document i ubject to change in form and content after further tudy. The contributor() reerve() the right to add, amend or withdraw material contained herein. The contributor grant a free, irrevocable licene to the IEEE to incorporate material contained in thi contribution, and any modification thereof, in the creation of an IEEE Standard publication; to copyright in the IEEE name any IEEE Standard publication even though it may include portion of thi contribution; and at the IEEE ole dicretion to permit other to reproduce in whole or in part the reulting IEEE Standard publication. The contributor alo acknowledge and accept that thi contribution may be made public by IEEE The contributor i familiar with the IEEE 80.6 Patent Policy and Procedure (Verion.0) < including the tatement IEEE tandard may include the known ue of patent(), including patent application, if there i technical jutification in the opinion of the tandarddeveloping committee and provided the IEEE receive aurance from the patent holder that it will licene applicant under reaonable term and condition for the purpoe of implementing the tandard. Early dicloure to the Working Group of patent information that might be relevant to the tandard i eential to reduce the poibility for delay in the development proce and increae the likelihood that the draft publication will be approved for publication. Pleae notify the Chair <mailto:r.b.mark@ieee.org > a early a poible, in written or electronic form, of any patent (granted or under application) that may cover technology that i under conideration by or ha been approved by IEEE The Chair will dicloe thi notification via the IEEE 80.6 web ite <

2 IEEE C806e-0_5r.pdf An Enhanced MIMO Tranmiion Scheme for OFDMA Sytem Seong Keun Oh, Moon Il Lee, Ki Bum Kwon, Heegoo Han Ajou Univerity Seung Joon Lee, Choong Il Yeh, Hyoung Soo Lim, In Kyeong Choi, Jong Ee Oh, Kwang Jae Lim, Seong Rag Kim, Young Seog Song, Yu Ro Lee, Dong Seung Kwon, Seung Ku Whang ETRI Introduction We propoe an enhanced Space-Time code with the full-rate and full-diverity for Tx-rate tranmiion. While thi code i pecified a a Space-Time code, it may alo be ued a a Space- Frequency code or a a hybrid. Propoed STC for Tx-rate tranmiion We propoe to add the tranmiion matrix: j0.77 C= j which i calculated from where C = ( + r + 5 r =, φ = 0, and φ = π. + jre ) + jre φ j φ j jre φ j φ j jre + + The propoed change i managed by the fact that the new tranmiion matrix C provide the full diverity gain (the diverity order of x no. of the receive antenna in the cae of an uncorrelated Rayleigh fading MIMO channel), while maintaining the rate or multiplexing gain of the exiting tranmiion matrix B in Section The new matrix C with the full rate of tranmit four ymbol over two OFDM ymbol time (cf., two ymbol over one OFDM ymbol time in the matrix B). Uing the propoed code, the full diverity gain i achieved by tranmitting each data ymbol o that it experience all the poible branche in the MIMO channel over two OFDM ymbol time while maintaining the code error matrix of rank. Then, the code ha been deigned o that the pairwie error probability between codeword could be minimized in order to maximize the coding gain. The - -

3 IEEE C806e-0_5r.pdf propoed STC can be applied to all QPSK, 6QAM, and 6QAM. The code admit decoding with a imple decoding algorithm of little more complexity a the typical decoding algorithm for matrix B. Fig. how the uncoded bit error rate performance of the propoed code compared with that of the known full-diverity full-rate cheme (called tilted-qam []) a well a the matrix B. Additionally Fig. how the comparion of the coded bit error performance between the propoed code and matrix B BER E- E- E-5 E-6 Tilted-QAM code Code matrix B Propoed code Eb/N0 [db] Fig. Uncoded bit error rate performance comparion among the propoed code, the tilted QAM code [] and the code matrix B in an uncorrelated flat Rayleigh fading channel for QPSK modulation ( MIMO ytem). - -

4 IEEE C806e-0_5r.pdf Fig. Coded bit error rate performance comparion between the propoed code and the code matrix B in the Pedetrian-B (0 km/h) channel with QPSK and CTC /. Specific Text Change [Create a new ection and inert it after Add the following paragraph at the end of ] Tranmiion cheme for -antenna BS and multiple-antenna MSS in DL The following matrix define the tranmiion format to obtain full-rate and full-diverity for tranmit antenna in BS and k (k ) receive antenna in MSS. The matrix C provide the full diverity gain of k, while maintaining the multiplexing gain of the exiting matrix B in Section j0.77 C = j

5 IEEE C806e-0_5r.pdf [Change the Table 8a in at Page 6 a indicated] Table 8a MIMO DL baic IE format Matrix_indicator STC matrix (ee ) STC = STC mode indicated in the latet STC_Zone_IE(). if (STC = 0b00) { 0 ~ = Reerved = Reerved eleif (STC = 0b0) { = Reerved eleif (STC = 0) { = Reerved - -

6 IEEE C806e-0_5r.pdf [Change the Table 8a in at Page 7 a indicated] Table 8a MIMO DL enhanced IE format Matrix indicator STC matrix (ee ) STC = STC mode indicated in the latet STC_Zone_IE(). if (STC = 0b00) { 0 ~ = Reerved = Reerved eleif (STC = 0b0) { = Reerved eleif (STC = 0) { = Reerved - 5 -

7 IEEE C806e-0_5r.pdf [Change the table in at Page 9 a indicated] OFDMA MSS demodulator for MIMO upport Type Length Value Scope 55 Bit #0: BS Tx Matrix A Bit #: BS Tx Matrix B Bit #: BS Tx Matrix A Bit #: BS Tx Matrix B Bit #: BS Tx Matrix C Bit #5: BS Tx Matrix A Bit #6: BS Tx Matrix B Bit #7: BS Tx Matrix C SBC-REQ (ee 6...) SBC-RSP (ee 6...) 0: BS Tx Matrix A : BS Tx Matrix B : BS Tx Matrix C : BS Tx Matrix A : BS Tx Matrix B 5: BS Tx Matrix C 6: BS Tx Matrix A 7: BS Tx Matrix B 8: BS Tx Matrix C Value 9 ~ 55: Reerved Reference [] H. Yao and G. W. Wornell, Structured pace-time block code with optimal diverity-multiplexing tradeoff and minimum delay, Globecom 00, pp