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| Ronald Y. Chang |
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| Ph.D., Ming Hsieh Department of
Electrical Engineering |
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| University of Southern California |
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| Email: yjrchang AT gmail.com |
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| Last Update 10-28-2009 |
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BIOGRAPHY
EDUCATION
| University of Southern
California (USC), Los Angeles, CA |
2004 - 2008 |
| Ph.D. in Electrical Engineering (Minor in
Mathematics), GPA 3.81 |
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- Thesis: "Resource Allocation in OFDM/OFDMA Cellular
Networks: Protocol Design and Performance Analysis"
- Advisor: Prof. C.-C. Jay Kuo
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| National Chiao Tung University (NCTU),
Taiwan |
2000 - 2002 |
| M.S. in Electronics Engineering, GPA 3.81 |
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- Thesis: "DSP Implementation of Successive
Interference Cancellation (SIC) Receiver for 3GPP W-CDMA Uplink Transmission"
- Advisor: Prof. David W. Lin
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| National Tsing Hua University (NTHU),
Taiwan |
1996 - 2000 |
| B.S. in Electrical Engineering, GPA 3.78 |
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WORK EXPERIENCE
| American GNC Corporation (AGNC), Simi Valley, CA |
Jan. 2009 - Present |
| Research Scientist |
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- Developed energy-efficient, disruption-tolerant network (DTN) routing algorithms
- WiFi mesh network implementation for multimedia support on robotic platform
- Product development in the fields of robotics, automation, guidance, routing
optimization, sensor and mesh networks
- Prepared NASA, DoD, and NSF SBIR proposals in areas of sensor networks, cognitive
networks, broadband systems, and navigation systems
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| Mitsubishi Electric Research Labs (MERL), Cambridge, MA |
Jan. 2008 - Aug. 2008 |
| Research Intern |
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- Designed a resource allocation framework for reuse-one, multi-antenna OFDMA networks
that achieves significant system throughput improvement
- Invented a dynamic fractional frequency reuse (FFR) framework for WiMAX that enhances
cell throughput and service rate
- Published 4 U.S. patents, 3 IEEE papers, and 1 IEEE 802.16m contribution paper
- Achievements recognized by multiple extension offers
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| University of Southern California |
Jan. 2005 - Dec. 2007 |
| Research Assistant |
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- Examined WiMAX's QoS performance through analysis and quantification of OFDM and OFDMA
with scheduling
- Designed a low-complexity, high-throughput distributed MAC protocol for OFDMA uplink
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| MediaTek Inc., Taiwan |
Sep. 2006 - Aug. 2007 |
| Contracted Project Consultant |
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- Innovated high-performance auto-white-balance (AWB) algorithms for cellular-phone
cameras
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| Industrial Technology Research Institute (ITRI), Taiwan |
Aug. 2002 - Oct. 2003 |
| Design Engineer |
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- Researched WLAN in high mobility applications, leading to U.S. Patent 7,310,393
- Conducted IC design for European digital TV (DVB-T/DVB-C)
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RESEARCH INTERESTS
- Radio resource allocation and interference management in wireless networks
- MAC protocol design and analysis for wireless networks
- QoS provision and consideration in wireless networks
- Routing for mobile ad hoc networks
- Network coding for wireless applications
- Digital image processing in consumer electronics applications
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SKILLS
| Communication & Signal
Processing: Digital/mobile communications, source/channel coding, DSP,
OFDM/OFDMA, CDMA, probability, random processes, linear algebra, statistics |
| Wireless Networking: Wireless
network routing protocols (OLSR, AODV, DSR), disruption tolerant networking (DTN), MAC
protocols for wireless networks |
| Technical: C, C++,
Matlab, HTML, LaTeX, Unix, Linux, Windows, NS-2, Prowler. Excellent PowerPoint
presentation skills |
| Language: Fluent in English and Chinese with excellent
writing skills |
| Interdisciplinary: Solid knowledge of Digital IC design,
VLSI, Verilog, Hspice; video/image signal processing; human language annotation/word-sense
creation |
| Transferable: Open-minded, hard-working, self-motivated,
cooperative, sincere |
PUBLICATION
| Journal |
| R. Y. Chang, Z. Tao, J. Zhang, and C.-C. J. Kuo, "A
Graph Approach to Dynamic Fractional Frequency Reuse (FFR) in Multicell OFDMA
Networks," in preparation. |
| H. Wang, R. Y. Chang, and C.-C. J. Kuo, "Wireless
Multi-party Video Conferencing with Network Coding," in preparation. |
| R. Y. Chang, Z. Tao, J. Zhang and C.-C. J. Kuo,
"Multicell OFDMA Downlink Resource Allocation Using A Graphic Framework," IEEE
Trans. Veh. Technol., vol. 58, no. 7, pp. 3494-3507, Sep. 2009. (pdf) |
| Y. Chang, F.-T. Chien, and C.-C. J. Kuo,
"Cross-layer QoS Analysis of Opportunistic OFDM-TDMA and OFDMA Networks," IEEE
J. Select. Areas Commun., vol. 25, no. 4, pp. 657-666, May 2007. (pdf) |
| Y. Chang, Y.-N. Lin, and D. W. Lin, "DSP
Implementation of Successive Interference Cancellation (SIC) Receiver for 3GPP WCDMA
Uplink Transmission," Wiley J. Wirel. Commun. Mob. Comput., Sep. 2003. (pdf) |
| Conference |
| H. Wang, R. Y. Chang, and C.-C. J. Kuo, "Wireless
Multi-party Video Conferencing with Network Coding," in Proc. IEEE ICME'09
(special session), June 2009. (pdf) |
| R. Y. Chang, Z. Tao, J. Zhang, and C.-C. J. Kuo, "A
Graph Approach to Dynamic Fractional Frequency Reuse (FFR) in Multi-Cell OFDMA
Networks," in Proc. IEEE ICC'09, June 2009. (pdf) |
| Y. Chang, Z. Tao, J. Zhang, and C.-C. J. Kuo, "A
Graph-based Approach to Multi-Cell OFDMA Downlink Resource Allocation," in Proc.
IEEE GLOBECOM'08, Nov. 2008. (pdf) |
| Y. Chang, F.-T. Chien, and C.-C. J. Kuo,
"Opportunistic Access with Random Subchannel Backoff (OARSB) for OFDMA Uplink,"
in Proc. IEEE GLOBECOM'07, Nov. 2007. (pdf) |
| Y. Chang, F.-T. Chien, and C.-C. J. Kuo, "Delay
Analysis and Comparison of OFDM-TDMA and OFDMA under IEEE 802.16 QoS Framework," in Proc.
IEEE GLOBECOM'06, Nov. 2006. (pdf) |
| Y. Chang, F.-T. Chien, and C.-C. J. Kuo,
"Performance Comparison of OFDM-TDMA and OFDMA with Cross-Layer Consideration,"
in Proc. IEEE VTC Fall'06, Sep. 2006. (pdf) |
| Patent |
| Y. Chang, Z. Tao, and J. Zhang, "Graph-Based Method
for Dynamic Fractional Frequency Reuse," U.S. Patent filed, Sep. 2008. |
| Y. Chang, Z. Tao, and J. Zhang, "Graph-Based Method
for Allocating Resources in OFDMA Networks," U.S. Patent Application 20090245085 (link to USPTO). |
| Y. Chang, Z. Tao, and J. Zhang, "Graph-Based Method
for Allocating Resources in OFDMA Networks," U.S. Patent Application 20090245086 (link to USPTO). |
| Y. Chang, Z. Tao, X. Mao, and K. H. Teo, "Dynamic
Radio Frequency Allocation for Base Station Cooperation with Interference
Management," U.S. Patent filed, Feb. 2008. |
| C.-R. Shen, M.-C. Chang, C.-C. Huang, and Y. Chang,
"Method and Apparatus for Synchronization of the OFDM Systems," U.S. Patent
7,310,393, Dec. 2007. (link to USPTO) |
| Standard |
| Z. Tao, Y. Chang, P. V. Orlik, R. Annavajjala, A. F.
Molisch, J. Zhang, and T. Kuze, "Dynamic Inter-cell Interference Coordination (ICIC)
and Signaling," IEEE C802.16m-08/528, July 2008. (pdf)(slides) |
PROFESSIONAL ACTIVITIES
- Reviewer for refereed IEEE journals (IEEE Trans. on Wireless Communications, IEEE
Vehicular Technology Magazine, etc.) and conferences (IEEE ICC'09, IEEE Globecom'08, etc.)
- Contributor to IEEE 802.16 Broadband Wireless Access Working Group, Project 802.16m
- TA for graduate course Digital Signal Processing at NCTU
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LEADERSHIP/EXTRACURRICULAR
ACTIVITIES
- Co-founder of active USC student organization, teaching over 50 students meditation
- Editor for circulating book in Los Angeles, Orange County, and County of Los Angeles
public libraries
- Designated translator/interpreter for World Leadership Education Foundation and American
Zen Association
- Contracted human language annotator/sense-creator for USC Information Sciences Institute
Ontonotes Annotation project
- Reliable speech and hearing test subject for House Ear Institute, Los Angeles
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REFERENCES
| Prof. C.-C. Jay Kuo (cckuo AT sipi.usc.edu, 213-740-4658), University of
Southern California |
| Dr. Hui Wang (wanghui AT usc.edu), Cisco Systems, Inc. |
| Dr. Jeffrey Z. Tao (tao AT merl.com, 617-621-7557), Mitsubishi Electric
Research Labs |
| Prof. Feng-Tsun Chien (ftchien AT mail.nctu.edu.tw), National Chiao Tung
University |
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