Synchronous data-antennas mapping in MIMO HARQ System in IEEE 802.16m Document Number: IEEE S802.16m-08/573r2 Date Submitted: 2008-07-14 Source: E-mail:

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Synchronous data-antennas mapping in MIMO HARQ System in IEEE m Document Number: IEEE S802.16m-08/573r2 Date Submitted: Source: Xiangyu Liu, Dengkui Zhu, Ying Liu, Zhaohua Lu, Yanfeng Guan, Rui Kang ZTE Corporation Xiaolu Dong Ying Du CATR Venue : IEEE m-08/024 Call for Contributions on Hybrid ARQ (PHY aspects) Base Contribution: C80216m-08_573r2 Purpose:For TGm discussion and adoption on the proposed text input for P802.16m SDD Notice: This document does not represent the agreed views of the IEEE Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and.

Introduction Conventional HARQ-MIMO systems: The relationship of mapping from data stream to antennas on transmitter is unchanged during initial transmission and re-transmission process. This implies that every data symbol on any one of transmit antennas will suffer static or semi-static channel condition across the re-transmission process in some scenarios New HARQ-MIMO Scheme The data stream may be mapped to different MIMO antenna at different retransmission, it may spread all over antenna channel statistic characteristic, so the space diversity and time diversity will be improved.

Synchronous Dynamic Data-Antennas Mapping Data-Antenna Mapping before transmission

Synchronous Dynamic Data-Antennas Mapping Synchronous dynamic data-antennas mapping means transmitter and receiver have same dynamic mapping pattern across initial transmission and re-transmission. In initial transmission, transmitter and receiver pre-assign a initial data-antenna mapping pattern via negotiation or using default given mapping pattern, this mapping can assign all data symbols to all antennas or part of antennas. In re-transmissions, transmitter and receiver hold same data-antenna mapping pattern synchronously that specify detailed mapping pattern in every retransmission. In different retransmission, data- antenna mapping pattern may be different.

Synchronous Dynamic Data-Antennas Mapping An example for number of data-streams equals to number of antennas

Synchronous Dynamic Data-Antennas Mapping An example for number of antennas is larger than number of data-streams

Proposed Text for SDD Start of the Text [Add the following text 11.x of TGm SDD] 11.x Synchronous dynamic data-antennas mapping in MIMO HARQ System BS and MS use synchronous dynamic data-antennas mapping. In initial transmission, transmitter and receiver pre-assign a initial data-antenna mapping pattern via negotiation or using default given mapping pattern, this mapping can assign all data symbols to all antennas or part of antennas. In re-transmissions, transmitter and receiver hold same data-antenna mapping pattern synchronously that specify detailed mapping pattern in every retransmission, every mapping pattern in every retransmission can assign all data symbols to all antennas or part of antennas. In different retransmission, data-antenna mapping pattern may be different.

Proposed Text for SDD If number of data-streams equal to number of antennas, transmitter and receiver map all data streams to all antennas, and every data-stream is mapped to a unique transmission antenna. If number of antennas is larger than number of data-streams, transmitter and receiver map all data-stream to part of transmission antenna via pre-assign mode, that means, every data-stream is mapped to a unique transmission antenna, whereas some antenna may not carry data stream End of the Text