| 摘要(英) |
In this thesis, implementation of a MIMO-OFDM transceiver for indoor high throughput wireless communication systems is presented. Turbo encoder at the outer transmitter is used for improving performance. The inner transmitter supports 4 antennas, 64-QAM constellation and three operation models for different numbers of subcarrier (512, 256 and 128 point). At inner receiver, three main function block of synchronization, channel estimation and MIMO detection are implemented. To support Turbo decoding in the outer receiver, we design a soft-output K-Best sphere decoder. Which uses discard paths to improve the performance of system. Observing analyzing the relationship between the number of discard paths and performance, we propose independent path selection method and merged path selection method to reduce the complexity of discard paths. Independent path selection method has lower complexity and is suitable for hardware implementation. Merge path selection method has better performance. In the hardware implementation, we choose the Independent path selection method because of low complexity and good performance. In the end, we integrate inner and outer transceiver, and simulate the system performance in TGn channel model.
In the project, we download the transceiver design into the FPGA, and integrate the RF analog frount-end. Finally we measure the signals of symbol boundary detection and channel estimation.
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| 參考文獻 |
[1] Chunhui Ju, Jun Ma, Chengzhi Tian, and Guanghui He, “VLSI Implementation of An 855 Mbps High Performance Soft-output K-Best MIMO Detector,” IEEE Circuits and Systems (ISCAS), pp. 2849-2852, May 2012.
[2] Meng-Yuan Huang and Pei-Yun Tsai, “Toward Multi-Gigabit Wireless: Design of High-Throughput MIMO Detectors with Hardware-Efficient Architecture,” IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 61, pp. 613-624, Feb 2014.
[3] Patel D., Smolyakov V., Shabany M. and Gulak P. G., “VLSI Implementation of a WiMAX/LTE Compliant Low-Complexity High-Throughput Soft-Output K-Best MIMO Detector,” Proceedings of 2010 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 593-596, May 2010.
[4] B. M. Hochwald and S. ten Brink, “Achieving near-capacity on a multiple-antenna channel,” IEEE Transactions on Communications, Vol. 51, No. 3, pp. 389-399, Mar 2003.
[5] Z. Guo and P. Nilsson, “Algorithm and implementation of the K-Best sphere decoding for MIMO detection,” IEEE Journal on Selected Areas in Communications, Vol. 24, No. 3, pp. 491-503, March 2005.
[6] P. Y. Tsai, Z. M. Chang, Z. Y. Huang and W. J. Jau, “Design and evaluation of a 4×4 MIMO transceiver for gigabit indoor wireless communication”, IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), pp. 955-958, Dec. 2010.
[7] IEEE 802.11 TGn channel model special committee, “TGn Channel Models for IEEE 802.11 WLANs”, IEEE DOC: IEEE 802.11-03/940r4, May 2004.
[8] P. Y. Tsai, W. T. Chen, X. C. Lin, M. Y. Huang, “A 4×4 64-QAM reduced-complexity K-best MIMO detector up to 1.5Gbps,” Proceedings of 2010 IEEE International Symposium on Circuits and Systems (ISCAS), pp.3953-3956, May 2010.
[9] Guanghui He, Junfeng Wang, Xi Chen and Jun Ma, “Gbps Soft-output K-Best MIMO Detector Design with Relaxed Parallel Sorting”, 2012 8th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM), pp. 1-4, Sept. 2012.
[10] C. Studer, M. Wenk, A. Burg and H. Bölcskei, “Soft-Output Sphere Decoding: Performance and Implementation Aspects”, IEEE Fortieth Asilomar Conference on Signals, Systems and Computers, pp. 2071-2076, Nov. 2006.
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