Research
Research Interests
- 3GPP LTE Key Technology
- Game Theory and its Application on Communications
- Cognitive Radio, Dynamic Spectrum Access
- Multiuser MIMO Signal Processing
- CDMA and Multiuser Detection
Research Experiences
- Senior Systems Engineer, Feb. 2011 ~ Present,
Qualcomm Incorporated, San Diego, CA
- Graduate Research Assistant, May 2007 ~ Dec. 2010,
Signals and Information Group, ECE department, University of Maryland
- Interim Engineering Intern, June 2009 ~ Aug. 2009,
Corporate R&D, Qualcomm Inc., San Diego, CA
- Graduate Research Assistant, Sep. 2003 ~ June 2006,
National Laboratory for Information Science and Technology, Tsinghua University
- Undergraduate Research Assistant, Oct. 2002 ~ July 2003,
National Laboratory for Information Science and Technology, Tsinghua University
Recent Research Projects
- 3GPP LTE Modem Design & Development, Feb. 2011 ~ Present
- Investigated on key technology in 3GPP long term evolution (LTE) and MIMO-OFDM systems, including cell search, cell measurement, etc.
- Designed novel signal processing algorithms for 3GPP LTE modems and simulated their performance.
- Supported the development and verification of the 3GPP LTE modem on chips.
- Secure Dynamic Spectrum Access, Mar. 2009 ~ Dec. 2010
- Investigated jamming attacks in cognitive radio networks, and proposed effective countermeasures against malicious attacks.
- Derived the achievable information secrecy rate when primary users cooperate with secondary users to enhance secrecy against intelligent eavesdroppers.
- Time-Reversal Communication Systems, Sept. 2009 ~ June 2010
- Demonstrated the time-reversal idea on a high-sampling-rate hardware platform.
- Game Theoretic Analysis of Cognitive Radio Networks, May 2007 ~ Dec. 2009
- Developed efficient spectrum access schemes for cognitive radio networks.
- Researched on competition and cooperation between selfish users by game theoretic modeling, and analyzed the equilibrium of the system.
- Proposed cheat-proof strategies to provide selfish secondary users incentives to reveal true private information.
- Proposed collusion-resistant strategies to eliminate collusive behavior among secondary users in a spectrum market.
Other Research Projects
- Active Hand-in in 3G Femtocells, June 2009 ~ Aug. 2009
- Understood practical channel characteristics by analyzing field measurement data.
- Investigated their impact on the active hand-in process in femtocells.
- Design & Implementation of a 4x4 MIMO OFDM Demo, Oct. 2002 ~ June 2006
- Participated in proposals for China¡¯s Beyond 3G mobile communication systems.
- Simulated a MIMO OFDM system as the downlink for the B3G system.
- Implemented a MIMO OFDM receiver using FPGA, DSP, and embedded CPU.
- Played a key role in accomplishing a demo achieving100Mbps over the air.
- Study on Multi-user MIMO Downlink Precoding, Sept. 2004 ~ Dec. 2005
- Developed antenna selection schemes for multi-user MIMO systems.
- Derived precoding schemes that minimize leaking energies or system-wide MSE.