Give


Graduate Exam Abstract


Bo Yu

Ph.D. Final

November 19, 2014, 12:00 pm - 2:00 pm

Mechanical Engineering Conference Room

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 three techniques for spectrum efficiency improvement, namely, the dynamic TDD, full-duplex relaying and 3D beamforming. 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. Finally, novel 3D beamforming schemes are proposed and evaluated for capacity enhancement and traffic load balancing in LTE small cells.

Adviser: Liuqing Yang
Co-Adviser: N/A
Non-ECE Member: Haonan Wang
Member 3: J. Rockey Luo
Addional Members: Jade Morton

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, vol. 21, no. 4, pp. 136-144, August 2014.

[J3] B. Yu, L. Yang, X. Cheng, and R. Cao, ``Resource Optimization for Full-Duplex Decode-and-Forward Relaying," submitted to IEEE Transactions on Communications.

[J4] B. Yu, L. Yang, H. Ishii, and S. Mukherjee, ``Dynamic TDD support in Macro-assisted Small Cell Architecture," submitted to IEEE Journal on Selected Areas in Communications.

[C1] B. Yu, L. Yang, and C.-C. Chong, ``Optimized Differential Bluetooth Demodulator," in Proc. of IEEE Asilomar Conference on Signals, Systems, and Computers, November 1-4, 2009.

[C2] B. Yu, L. Yang, and C.-C. Chong, ``Wireless ECG Monitoring 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 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, and 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] X. Cheng, B. Yu, X. Cheng, and L. Yang, ``Two Way Full-Duplex Amplify-and-Forward Relaying,'' in Proc. of the IEEE Military Communications Conference (MILCOM), San Diego, CA, USA, November 18-20, 2013.

[C9] F. Wang, X. Cheng, L. Yang, B. Yu, and B. Jiao, ``On the Achievable Capacity of Dual-Polarized Antenna Systems in 3D Indoor Scenarios,'' in Proc. of IEEE/CIC International Conference on Communications in China (ICCC'13), Xi'an, China, August 12-14, 2013.

[C10] H. Ishii, X. Cheng, S. Mukherjee, and B. Yu, ``An LTE Offload Solution using Small Cells with D2D Links," in Proc. of IEEE ICC 2013 International Workshop on Small Cell Wireless Networks (SmallNets), Budapest, Hungary, June 9-13, 2013.

[C11] 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.

[C12] B. Yu, L. Yang, and H. Ishii, ``3D Beamforming for Capacity Improvement in Macrocell-Assisted Small Cell Architecture,'' in Proc. of IEEE Global Communications Conference (GLOBECOM), Austin, Texas, December 8-12, 2014.


Program of Study:
ECE520
ECE799
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