Doc.: IEEE 802.11-14/1401r0 Submission November 2014 Slide 1 Shiwen He ， Haiming Wang Quasi-Orthogonal STBC for SC-PHY in IEEE 802.11aj (45GHz) Authors/contributors:

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Presentation transcript:

doc.: IEEE /1401r0 Submission November 2014 Slide 1 Shiwen He ， Haiming Wang Quasi-Orthogonal STBC for SC-PHY in IEEE aj (45GHz) Authors/contributors: Date: Presenter: Haiming Wang

doc.: IEEE /1401r0 Submission November 2014 Slide 2 Shiwen He ， Haiming Wang -In n/ac/ad, the orthogonal STBC is widely used for improving the performance of wireless communication systems. -The Alamouti code is the unique scheme to achieve the maximum diversity order as well as full rate transmission in case of 2 transmitting antennas. -Some alternative schemes could be applied in systems with more than 2 antennas. These coding schemes are suboptimal as they cannot achieve full transmission rate and full diversity order simultaneously. - One scheme of Orthogonal STBC can achieve full diversity order at a rate of 1/2. Background

doc.: IEEE /1401r0 Submission November 2014 Slide 3 Shiwen He ， Haiming Wang Code matrix: - Quasi Orthogonal STBC can achieve full rate transmission with impairing diversity order. Code matrix: The elements in each row are the symbols to be transmitted on each antenna.

doc.: IEEE /1401r0 Submission November 2014 Slide 4 Shiwen He ， Haiming Wang Introduction -Quasi Orthogonal STBC(4×1 -1ss) t 1 t 2 t 3 t 4 -Data stream:

doc.: IEEE /1401r0 Submission November 2014 Slide 5 Shiwen He ， Haiming Wang -Location in Transmitter:

doc.: IEEE /1401r0 Submission November 2014 Slide 6 Shiwen He ， Haiming Wang - Code block: k-th time slot: (k+1)-th time slot:

doc.: IEEE /1401r0 Submission November 2014 Slide 7 Shiwen He ， Haiming Wang (k+2)-th time slot: (k+3)-th time slot: - Then the original data can be obtained using linear processing in the receiver.

doc.: IEEE /1401r0 Submission November 2014 Slide 8 Shiwen He ， Haiming Wang - Comparisons of error performance of the 4×1 system with BPSK Modulation and 1/2-rate and 1-ss. QSTBC outperforms CSD by 0.4dB approximately.(PER=0.1) QSTBC outperforms SC-1×1 by 2.2dB approximately.(PER=0.1) Simulation

doc.: IEEE /1401r0 Submission November 2014 Slide 9 Shiwen He ， Haiming Wang - Comparisons of error performance of the 4×1 system with QPSK Modulation and 1/2-rate and 1-ss. QSTBC outperforms CSD by 0.8dB approximately.(PER=0.1) QSTBC outperforms SC-1×1 by 1.2dB approximately.(PER=0.1)

doc.: IEEE /1401r0 Submission November 2014 Slide 10 Shiwen He ， Haiming Wang - Comparisons of error performance of the 4×1 system with 16-QAM Modulation and 1/2-rate and 1-ss. QSTBC outperforms CSD by 2dB approximately.(PER=0.1)

doc.: IEEE /1401r0 Submission November 2014 Slide 11 Shiwen He ， Haiming Wang - Comparisons of error performance of the 4×4 system with BPSK Modulation and 1/2-rate and 1-ss. QSTBC outperforms CSD by 0.5dB approximately.(PER=0.1)

doc.: IEEE /1401r0 Submission November 2014 Slide 12 Shiwen He ， Haiming Wang - Comparisons of error performance of the 4×4 system with QPSK Modulation and 1/2-rate and 1-ss. QSTBC outperforms CSD by 0.8dB approximately.(PER=0.1)

doc.: IEEE /1401r0 Submission November 2014 Slide 13 Shiwen He ， Haiming Wang - Comparisons of error performance of the 4×4 system with 16QAM Modulation and 1/2-rate and 1-ss. QSTBC outperforms CSD by 1.5dB approximately.(PER=0.1)

doc.: IEEE /1401r0 Submission November 2014 Slide 14 Shiwen He ， Haiming Wang Conclusion Similar as the conventional Alamouti’s code with 2 antennas, the QO-STBC can also obtain the full-rate transmission. Considering the implementation of hardware, the decoding algorithm of QOSTBC based on linear processing is low- complexity, and all the signal processing can be performed on existing resources. It’s reasonable to apply QO-STBC to the SC-PHY of aj (45GHz) to improve link robustness or extend coverage. The QO-STBC is also possible to used for the OFDM-PHY of aj (45GHz).

doc.: IEEE /1401r0 Submission November 2014 Slide 15 Shiwen He ， Haiming Wang Reference [1] Single-Carrier Frequency-Domain Equalization for Space–Time Block-Coded Transmissions over Frequency-Selective Fading Channels [2] Single-Carrier Frequency-Domain Equalizer with Multi-Antenna Transmit Diversity [3] Frequency Domain DFE for Single-Carrier STBC Block Transmission [4] Coding for MIMO Communication Systems, Tolga M.Duman, Ali Ghrayeb

doc.: IEEE /1401r0 Submission November 2014 Slide 16 Shiwen He ， Haiming Wang Thanks for Your Attention!