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Graduate Exam Abstract


Bo Yu

Ph.D. Preliminary

April 16, 2014, 12:00pm-2:00pm

Dean's Conference Room (B214 Engineering)

Spectrum efficiency for future wireless communications


Abstract: Driven by new services and terminal capabilities, mobile data traffic has grown dramatically over the past several years and is continuing to grow rapidly. According to a forecast by Cisco, the global mobile data traffic grew 70 percent in 2012, and will increase 13-fold between 2012 and 2017. As a result, there is an explosive demand for wireless data capacity. This demand for data may be met by (i) new spectrum,(ii) more efficient use of spectrum: shared UL/DL spectrum (dynamic TDD) has been proposed with this goal in mind, and (iii) increasing cell density, allowing spatial reuse of resources to increase system capacity. In this presentation, we propose and evaluate two techniques for spectrum efficiency improvement, namely, the dynamic TDD and full-duplex relaying. For dynamic TDD, we apply results from stochastic geometry to derive expressions for the distribution of DL signal to interference plus noise ratio (SINR) at an arbitrary UE and the distribution of UL SINR at its serving base station (BS). System level simulations are also conducted to evaluate the performance of dynamic TDD and the related interference issues under more general and realistic system assumptions. Then a frequency domain interference coordination technique is provided, and the superior performance of the proposed scheme over conventional frequency reuse technique and no interference coordination scenario is verified by system level simulations. For full-duplex relaying, we investigate the optimal resource allocation (both power and relay location) for full-duplex decode-and-forward (DF) relaying systems. Analytic and numerical results are provided to demonstrate advantages of the resource optimization.

Adviser: Dr.Liuqing Yang
Co-Adviser: N/A
Non-ECE Member: Dr.Haonan Wang, Statistics
Member 3: Dr.Jie Luo, Dr.Anura Jayasumana
Addional Members: N/A

Publications:
[J1]B. Yu, L. Yang and C.-C. Chong, "Optimized Differential GFSK Demodulator," IEEE Transactions on Communications, vol. 59, no. 6, pp. 1497-1501, June 2011.
[J2]X. Cheng, B. Yu, L. Yang, J. Zhang, G. Liu, Y. Wu, and L. Wan, "Communicating in the Real World: 3D MIMO," IEEE Wireless Communications Magazine, 2014 (in revision)
[J3]B. Yu, L. Yang, X. Cheng, and R. Cao, "Resource Optimization for Full-Duplex Decode-and-Forward Relaying," (in preparation)
[J4]B. Yu, L. Yang, H. Ishii, and S. Mukherjee, "Dynamic TDD support in the Enhanced Local Area Architecture," (in preparation)
[C1]B. Yu, L. Yang and C.-C. Chong, "Optimized Differential Bluetooth Demodulator," in Proc. of IEEE Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 1-4, 2009.
[C2]B. Yu, L. Yang and C.-C. Chong, "Wireless ECG Monnitoring over Bluetooth," in Proc. of IEEE Wireless Communications & Networking Conference (WCNC), Sydney, Australia, April 18-21, 2010.
[C3]B. Yu, S. Mukherjee, H. Ishii and L. Yang, "Dynamic TDD support in the LTE-B enhanced Local Area architecture," in Proc. of the 4th IEEE International Workshop on Heterogeneous and Small Cell Networks (HetSNets), Anaheim, CA, December 3-7, 2012.
[C4]B. Yu, H. Ishii and L. Yang, "System level performance evaluation of dynamic TDD and interference coordination in enhanced Local Area Architecture," in Proc. of the 77th IEEE Vehicular Technology Conference (VTC-Spring), Dresden, Germany, June 2-5, 2013.
[C5]B. Yu, X. Cheng and L. Yang, "Energy Saving Analysis and Evaluation in the Enhanced Local Area Architecture," in Proc. of IEEE ICC 2013 International Workshop on Small Cell Wireless Networks (SmallNets), Budapest, Hungary, June 9-13, 2013.
[C6]B. Yu, L. Yang, X. Cheng, R. Cao, "Transmit Power Optimization for Full Duplex Decode-and-Forward Relaying," in Proc. of IEEE Global Communications Conference (GLOBECOM), Atlanta, GA, December 9-13, 2013.
[C7]B. Yu, L. Yang, X. Cheng, and R. Cao, "Relay Location Optimization for Full-Duplex Decode-and-Forward Relaying," in Proc. of the IEEE Military Communications Conference (MILCOM), San Diego, CA, USA, November 18-20, 2013.
[C8]B. Yu, L. Yang, H. Ishii, and X. Cheng, "Load Balancing with Antenna Tilt Control in Enhanced Local Area Architecture," in Proc. of the 79th IEEE Vehicular Technology Conference (VTC-Spring), Seoul, Korea, May 18-21, 2014


Program of Study:
ECE520
ECE799
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