Chun-Hao Liu received his B.S. degree from National Chiao Tung University and M.S. degree from National Taiwan University, Taiwan, in 2007 and 2009, respectively, all in Electronics Engineering. In 2011, he joined the Electrical Engineering Department of the University of California, Los Angeles. In 2015, he received his Ph.D. degree with his dissertation title: Traffic-Aware Spectrum Sharing Protocols. His research interests are wireless communications, dynamic spectrum access, cognitive radios, digital signal processing, machine learning, and data mining. Currently he is working in Qualcomm Inc. for LTE modem system design as a senior system engineer.

Education

• Ph.D., Electrical Engineering, University of California, Los Angeles, USA, 2015
• M.S., Graduate Institude of Electronics Engineering, National Taiwan University, Taiwan, 2009
• B.S., Electronics Engineering, National Chiao Tung University, Taiwan, 2007

Research Experience

• Graduate Student Researcher, UCLA
  • Design traffic estimation and prediction algorithms for cognitive radios.
  • Design resource allocation algorithms for cognitive radios.
• Graduate Student Researcher, NTU
  • Design of Joint Transmitter-Receiver Beamforming in Mobile MIMO OFDM Systems.
  • Design a High-performance Baseband Channel Simulator for MIMO Wireless Communication.

Industry Experience

Senior System Engineer, Qualcomm, Sep. 2015~Present

• With LTE demodulation team for legacy demod and advanced receiver design.

Interim Engineering Intern, Qualcomm, Jun. 2014~Sep. 2014

• Channel quality indicator prediction for TD-SCDMA systems.

Digital IC Design Engineer, Industrial Technology Research Institute, Oct. 2010~Jun. 2011

• Design PHY layer baseband algorithms for IEEE 802.11p DSRC systems.
• Build up wireless channel models for Taiwan High Speed Rail and other recommended models used for high-mobility transceivers.
• Survey IEEE 802.16(m) spec for inner and outer transceivers.

Publications

Journals, Letters and Magazines

• Chun-Hao Liu, Arash Azarfar, Jean-Francois Frigon, Brunilde Sanso, and Danijela Cabric, “Robust Cooperative Spectrum Sensing Scheduling Optimization in Multi-Channel Dynamic Spectrum Access Networks”, in IEEE Transactions on Mobile Computing, vol. 15, no. 8, pp. 2094-2108, Aug. 2016.
• Chun-Hao Liu and Danijela Cabric, “Prediction of Erlang-2 Distributed Primary User Traffic for Dynamic Spectrum Access”, in IEEE Wireless Communications Letters, vol. 4, no. 5, pp. 481-484, Jun. 2015.
• Chun-Hao Liu, Przemyslaw Pawełczak, and Danijela Cabric, “Primary User Traffic Classification in Dynamic Spectrum Access Networks”, in IEEE Journal on Selected Areas in Communications, vol. 32, no. 11, pp. 2237-2251, Nov. 2014.
• Chun-Hao Liu, Jason Tran, Przemyslaw Pawełczak, and Danijela Cabric, “Traffic-Aware Channel Sensing Order in Dynamic Spectrum Access Networks”, IEEE Journal on Selected Areas in Communications, vol. 31, no. 11, pp. 2312-2323, Nov. 2013.
• Wesam Gabran, Chun-Hao Liu, Przemyslaw Pawełczak, and Danijela Cabric, “Primary User Traffic Estimation for Dynamic Spectrum Access”, IEEE Journal on Selected Areas in Communications, vol. 31, no. 3, pp. 544–558, Mar. 2013.

Conferences

• Arash Azarfar, Chun-Hao Liu, Jean-Francois Frigon, Brunilde Sanso, and Danijela Cabric, “Joint Transmission and Cooperative Spectrum Sensing Scheduling Optimization in Multi-Channel Dynamic Spectrum Access Networks”, accepted to IEEE DySPAN, Mar. 2017.
• Liping Du, Y. Chen, Mihir Laghate, Chun-Hao Liu, and Danijela Cabric, “Improved Eigenvalue-based Spectrum Sensing via Sensor Signal Overlapping”, accepted to IEEE ICCSN, Apr. 2016.
• Chun-Hao Liu and Danijela Cabric, “Traffic-Aware Backoff Design for IEEE 802.11(ac)”, in IEEE International Conference on Computing, Networking, and Communications, (ICNC), Feb. 2016.
• Liping Du, Chun-Hao Liu, Mihir Laghate, and Danijela Cabric, “Sequential Detection of Number of Primary Users in Cognitive Radio Networks”, in IEEE Asilomar Conference on Signals, Systems and Computers, Nov. 2015.
• Arash Azarfar, Chun-Hao Liu, Jean-Francois Frigon, Brunilde Sanso, and Danijela Cabric, “Cooperative Spectrum Sensing Scheduling Optimization in Multi-Channel Dynamic Spectrum Access Networks”, in IEEE GLOBAL Communications Conference (GLOBECOM), Dec. 2014.
• Chun-Hao Liu, Eric Rebeiz, Przemyslaw Pawełczak, and Danijela Cabric, Primary User Traffic Classification in Dynamic Spectrum Access Networks, in IEEE GLOBAL Communications Conference (GLOBECOM), Dec. 2013.
• Wesam Gabran, Przemyslaw Pawełczak, Chun-Hao Liu, and Danijela Cabric, “Blind Estimation of Primary User Traffic Parameters Under Sensing Errors”, in IEEE International Conference on Communications (ICC), Jun. 2013.
• Chun-Hao Liu, Wesam Gabran, and Danijela Cabric, “Prediction of Exponentially Distributed Primary User Traffic for Dynamic Spectrum Access”, in IEEE GLOBAL Communications Conference (GLOBECOM), Dec. 2012.
• Chun-Hao Liu and Gene C.H. Chuang, “Joint ICI Cancellation and Channel Estimation with Real-Time Channel Adaptation for High-Mobility OFDM Systems”, in IEEE GLOBAL Communications Conference (GLOBECOM) Workshops, Dec. 2011.
• Chun-Hao Liao, Chien-Yi Wang, Chun-Hao Liu, and Tzi-Dar Chiueh, “An O(qlogq) Log-Domain Decoder for Non-Binary LDPC over GF(q)”, in IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), pp. 1644-1647, Dec. 2008.
• Chun-Hao Liao, Jun-Wei Lin, Yen-Shuo Chang, Ching-Hao Yu, Chun-Hao Liu, and Tzi-Dar Chiueh, “An IP Generator for Quasi-Cyclic LDPC Convolutional Code Decoders”, in IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), pp. 1652-1655, Dec. 2008.

Theses

• Chun-Hao Liu, “Traffic-Aware Spectrum Sharing Protocols”, Ph.D. thesis, Electrical Engineering, UCLA, Sep. 2015.
• Chun-Hao Liu, “Design of Joint Transmitter-Receiver Beamforming in Mobile MIMO OFDM Systems”, Master’s thesis, Graduate Institute Electronics Engineering, National Taiwan University, Jul. 2009.

Awards

• Chancellor’s Prize Fellowship, 2011 Academic Year, UCLA

Contact Information

• Email:sliuch37@ucla.edu