| 摘要(英) |
This thesis presents an O-QPSK transceiver with 2×2 spatial modulation for Internet of Things applications. The communication system uses 2.4GHz carrier frequency with a 3Mbps data rate. The transceiver uses 2×2 MIMO transmission with spatial modulation. The receiver is separated into three main blocks, including coarse synchronization, fine synchronization and data recovery.
First, for coarse synchronization, we decrease the usage of hardware such as CORDICs, multipliers, and DFFs about 33% to achieve symbol boundary detection. Then, for the fine synchronization, we have phase compensation, residual phase tracking to compensate received signals and channel estimation for data recovery. We also reuse the hardware, like CORDICs and multipliers, so about 67% hardware is reduced. As for the look up table, we take advantage of the symmetry and repetition so that our table size is reduced by 75%. Last but not least, for the data recovery block, maximum likelihood detection is used for recovering signal. By simplifying our algorithm, we adopt no multiplier in this block. Due to the trade-off between the number of comparators and latency, we can eliminate the comparators by 73%. According to the synthesis result, the maximum clock frequency is 7.594 MHz and the implementation can achieve the data rate of 3Mbps. |
| 參考文獻 |
參考文獻
[1] IEEE Standard for Local and Metropolitan Area Networks Part 15.4:Low-Rate Wireless Personal Area Networks(LR-WPANs),IEEE Computer Society Std.
[2] Rashmi-Sharan Sinha, Yi-qiao Wei, Seung-Hoon Hwang.” A survey on LPWA technology: LoRa and NB-IoT”, Division of Electronics and Electrical Engineering, Dong guk University-Seoul, Republic of Korea, 21 March 2017
[3] Jin-Seong Lee and Jai-Yong Lee.” Prediction-Based Energy Saving Mechanism in 3GPP NB-IoT Networks”, School of Electrical and Electronics Engineering, Yonsei University, Published online Sep 1 2017
[4] Ron Porat, ” NEXT GEN WIFI: EVOLUTION BEYOND 11AC “, Broadcom corporation, 2012.
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[6] Ching-Hao Yang and Pei-Yun Tsai, “Design of a low-complexity O-QPSK transceiver with spatial modulation for internet-of-things applications”,IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), 2016
[7] K. H. Chen and H. P. Ma, “A Low Power ZigBee Baseband Processor,” in Proc. of International SOC Conference, Nov. 2008 pp. 40-43.
[8]Ze-Mu Chang, “Design and Evaluation of Gigabit Indoor Wireless Communication Systems”, M.S. thesis, National Central University, Taoyuan, Taiwan, 2010
[9] Ching-Hao Yang, “Design of a Multi-mode Low-complexity Transceiver for Wireless Sensor Networks”, M.S. thesis, National Central University, Taoyuan, Taiwan, 2015 pp.40-41.
[10] Kuan-yuen Liao, “The Baseband Signal Processing and Circuit Design for 915 MHz Amplitude Shift Keying Modulation Mode of the IEEE 802.15.4 – 2006 Low Rate-Wireless Personal Area Network”, M.S. thesis, National Sun Yet-San University, Kaoshung, Taiwan, 2009
[11] N. Serafimovski, and et al., “Practical Implementation of Spatial Modulation,” IEEE Transactions on Vehilcular Technology, pp. 4511~4523, Nov. 2013.
[12] Ching-Hao Yang, “Design of a Multi-mode Low-complexity Transceiver for Wireless Sensor Networks”, M.S. thesis, National Central University, Taoyuan, Taiwan, 2015 pp.76-87. |
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