Fu-Hsuan Chiu Jun. 20, 1975
fuhsuan@gmail.com
EDUCATION
2001 - 2006: Ph.D., Electrical Engineering
University of Southern California (USC), Los Angeles, CA
- Dissertation: Transceiver design and performance analysis of adaptive bit-interleaved coded MIMO-OFDM systems
- Thesis work is directly related to WiMAX, 3GPP-WCDMA, 3GPP-HSPA, 3GPP-LTE, 802.11n, DVB, MIMO-OFDM systems, relay networks and mesh networks.
1997 - 1999: M.S., Electrical Engineering
National Taiwan University (NTU), Taipei, Taiwan
- Thesis: Design and implementation of inverse multiplexing chip for ATM
1993 - 1997: B.S., Electrical Engineering
National Taiwan University (NTU), Taipei, Taiwan
WORKING EXPERIENCE
07/2008-current Scientists, Senior Staff Systems Design, Broadcom, Matawan, NJ
LTE design and implementation
- Responsible for multi-map turbo decoder system architecture, algorithm development and fixed-point design. Verified algorithm performance in C platform. Proposed architecture can support upto 8-MAP and radix-4 and can achieve 100Mbps or 150Mbps decoding throughput dependent on number of MAP running simultaneously. Using dual turbo decoder can achieve maximum decoding throughput requirement 300Mbps of category 5.
- Responsible for PDCCH blind decoding procedure design and algorithm development. Proposed a near-optimum decoding algorithm and system architecture that meet timing requirement.
RF design and implementation
- Responsible for building RF model and filter design and integrate with customer’s design in C platform.
- Responsible for 2G Rx upfade/downfade margin requirement. Tune digital gain after channel selection filter to relax downfade margin requirement.
HSPA+ design and implementation
- Define CELL_DCH DTX/DRX system requirements and impacts on existing HW/FW blocks. Develop matlab code to simulate DTX/DRX functionality.
- Fine-tuning design of cluster paths processing to have better throughput performance
- Revised viterbi decoder.
- Provided DPCH/DCCH/FACH/PCH combination test cases. Enhance the C platform to decode multiple CCTrCHs.
- Clean legacy bugs on RM, multiple blocks segmentation, AGC.
EDGE/GSM/GPRS design and verification
- Revised viterbi decoder and generated testvector for verification
- Introduce burst normalization process based on power estimation to enhance DSP performance in deep fade.
Bluetooth decoder research
- Implement a SEC-DAEC (15,10) hamming code decoder in C-platform. Investigated the usage of DAEC.
12/2006-07/2008 Communication Systems Engineer, Texas Instruments, San Diego, CA
3GPP Release 7 design and implementation
- Participated in enhanced frequency-domain chip level equalizer design.
- Designed new LLR algorithm and related fixed-point assignment, which outperforms original design in every test channels, SNR and loading.
- Designed fixed-point HSDPA control channel (HS-SCCH) decoder using List Viterbi Algorithm and implemented in both C++ and VHDL.
- Designed and implemented a LMMSE receiver employed with synchronization channel (SCH) cancellation to achieve 17.4Mbps throughput of catagory13 in practical RF operation region.
- Designed and implemented digital frequency offset compensation algorithm.
- Designed and implemented advanced chip-level-front-end to compensate I-Q imbalance.
- Designed and implemented low-complexity Doppler speed estimation algorithm.
- Proposed a fixed-point fast inverse square root algorithm based on Newton Method which requires 9 multiplications and 3 additions to achieve a relative error within 2%.
- Designed a novel max-star approximation to improve turbo decoder performance.
- Designed system architecture and an end-to-end C++ simulator to support and test features of Release 7 64QAM mode.
- Upgraded C++ simulator to support HSPDA Release 8 features.
- Participated in system architecture and an end-to-end C++ simulator to support and test features of Release 7 CPC mode.
- Submitted 5 contribution papers (64QAM and HS-SCCH) to 3GPP RAN4 meeting.
- Design IQ-imbalance model, random walk frequency offset model and AGC for RF impairment block.
- Investigated coexistence problem of Release 5 and Release 7 users by studying the codebook algebra property.
3GPP-LTE design and implementation
- Developed and implemented near-optimum low-complexity tail-biting convolutional bi-directional warmup Viterbi decoder for LTE control channel.
- Developed frequency offset tracking and compensation algorithm for LTE.
- Developed synchronization algorithm for LTE.
- Developed 2D channel estimation/interpolation algorithm for LTE.
- Developed MIMO channel model in C++ and Matlab.
- Developed pre-coding index feedback algorithm.
3GPP Release 5 design and implementation
- Designed a turbo decoder for 3GPP HSDPA to enhance the processing speed upto 4 by integrated both DUAL MAP and Radix-4.
- Developed test bench for HARQ including rate-matching monitor.
3GPP-R99 design and implementation
- Implemented floating point rake receiver for R99.
- Integrated DBB with DRP.
Wimax and 802.11n research
- Implemented LDPC decoder in C++.
DVB research
- Implemented RS code decoder in C++.
RESEARCH EXPERIENCE
Communications Research in Media Communications Lab, USC
• Adaptive bit-interleaved MIMO-OFDM systems (2005-2006)
- Proved the lowerbound of noncoherent capacity as a function of number of transmit antennas, subcarriers and channel taps of MIMO-OFDM systems.
- Analyzed throughput limit of adaptive MIMO-OFDM systems.
- Proved that adaptive variable-rate scheme has the same behavior of diversity-multiplexing gain tradeoff as MIMO systems employed with random Gaussian codewords.
- Proved that OFDMA with opportunistic scheduling can enhance MIMO multiuser downlink throughput than traditional TDMA scheduling upto a constant dependent on number of users and number of antennas but independent of SNR.
- Analyzed imperfect channel feedback effect on adaptive MIMO-OFDM systems.
• Receiver design for MIMO-OFDM systems in time-varying environment (2004-2005)
- Developed a soft-decision-feedback Kalman filter for joint MIMO channel tracking and symbol detection based on EM algorithm.
- Examined two types of soft decoders: BCJR and list sphere decoder (LSD).
- Proposed Rao-Blackwellised particle filter approach to jointly estimate nonlinear parameters (CFO and PO) and linear parameters (channel taps).
• Reduced-rank channel estimation for MIMO channels (2003-2004)
- Applied Alternative Power method to obtain better estimation of MIMO channel matrix which is not full-rank.
- Extended the result to perform angle-delay pattern estimation in a time-varying MIMO-ISI channel.
• Power allocation on cooperative and relay networks (2005-2006)
- Proposed optimal power allocation schemes with respect to different optimization criterion in relay networks.
- Analyzed the lifetime of battery-limited relay nodes employed with various power allocation schemes.
- Surveyed the resource allocation methods in cooperative networks.
• Peak-to-average-power-ratio (PAPR) reduction of OFDM systems (2004-2006)
- Proposed a novel “Generalized Rudin-Shapiro construction” for fast construction of low PAPR code sequence of MPSK constellation.
- Analyzed the tradeoff between the PAPR reduction and the throughput of OFDM systems.
Research in NTU, Taipei, Taiwan
• Low power circuit design (1998-1999)
- Surveyed low power circuit design techniques including dynamic circuits and physical routing algorithms.
- Applied the results on the design of inverse multiplexing chip for ATM.
• Video-on-demand (VOD) multimedia server design (1997-1998)
- Designed the storage architecture and data structure at the server end.
- Designed a quality-of-service (QoS) guaranteed media access protocol for VOD application.
PhD Student Mentoring Experience
Mentoring of four PhD students in Media Communication Lab, USC
- Mentoring Wan-Jen Hwang on the project of lifetime analysis of energy-constrained relay networks.
- Mentoring Hae-Leem Lee on the project of the tradeoff between PAPR reduction and throughout of OFDM systems.
- Mentoring Yu-Rung Chang on the project of cross-layer design of multimedia communication.
- Mentoring Cheng-hao Chien on the project of ECG signal decomposition using EMD and MIMO principle.
Skills
Programming Skills: C, C++, MATLAB.
EDA Tools: VHDL, ModelSim, Synopsys tools, AHDL, Hspice, Cadence tools.
Mathematical Tool: Mathematica, Mathcad.
Script: Perl.
Language Proficiency: Fluent in both English and Mandarin Chinese.
Awards and Scholarships
Receipt, President Award, NTU, 1995;
Research Assistantship, IMSC, USC, 2003~2005;
Research Assistantship, EE, USC, 2005~2006.
SERVICES
Reviewer for Journal Manuscript Submission:
- IEEE Transactions on Wireless Communications;
- IEEE Transactions on Signal Processing;
- IEEE Transactions on Vehicular Technology.
- Int. J. of Electronics and Communications, Elsevier
Reviewer for Conference Manuscript Submission:
VTC2004-2007, GLOBECOM2005-2007, ICC2006~2007, EUSIPCO2006, MILCOM2006 and WCNC2007.
Reference
Professor C.-C. Jay Kuo (PhD thesis Advisor)
Viterbi School of Engineering, University of Southern California
3740 McClintock Ave, EEB 400, Los Angeles, CA 90089
Email: cckuo@sipi.usc.edu
Tel: 213-740-4658
Dr. Yu-Hung Kao (manager at TI)
Senior staff engineer, Qualcomm
Contact information upon request
Dr. Li Fung Chang (manager at Broadcom)
Director, Broadcom Corporation
Contact information upon request
PUBLICATION
Invited talk :
T1. F.-H. Chiu, “LTE PHY layer: from standard to implementation,” presented in IEEE Radio and Wireless Symposium 3GPP LTE Downlink and Uplink Workshop, San Diego, CA, Jan 18th 2009.
Journal papers:
J1. Y.-W. Hong, W.-J. Huang, F.-H. Chiu and C.-C. J. Kuo, “Cooperative communications in resource-constrained wireless networks,” in IEEE Signal Processing Magazine, Special Issue on Resource-Constrained Signal Processing, Communications, and Networking, May 2007.
Conference papers:
C1. F.-H. Chiu, “Coexistence of release 7 and release 5 in 3GPP HSDPA,” submitted to IEEE Globecom 2007, Washington D. C.
C2. F.-H. Chiu, Y.-W. Hong and C.-C. J. Kuo, “Throughput analysis of feedback directed MIMO-OFDM systems,” in Proceeding IEEE WCNC 2007, Hong Kong.
C3. F.-H. Chiu, S.-H. Wu and C.-C. J. Kuo, “Performance analysis and transceiver design of adaptive BIC-MIMO-OFDM systems,” in Proceeding IEEE WCNC 2007, Hong Kong.
C4. F.-H. Chiu, S.-H. Wu and C.-C. J. Kuo, “Throughput analysis of adaptive MIMO-OFDM systems: from single to multiple users,” in Proceeding IEEE WTS 2007, Pomona, CA.
C5. W.-J. Huang, F.-H. Chiu, C.-C. J. Kuo and Y.-W. Hong, “Comparison of power control schemes for relay sensor networks,” in Proceeding IEEE ICASSP 2007.
C6. F.-H. Chiu, S.-H. Wu and C.-C. J. Kuo, “Receiver design for bit-interleaved MIMO-OFDM systems over time-varying channels,” in Proc. IEEE WCNC, Las Vegas, NV, Apr. 2006.
C7. F.-H. Chiu, S.-H. Wu and C.-C. J. Kuo, “Joint MIMO channel tracking and symbol detection with EM Algorithm and soft decoding,” in Proc. IEEE GLOBECOM, St Louis, Nov. 2005.
C8. F.-H. Chiu, S.-H. Wu and C.-C. J. Kuo, “Robust joint channel estimation and symbol detection over MIMO channels using EM algorithm,” in Proc. IEEE VTC, Dallas, Sep. 2005.
C9. F.-H. Chiu, S.-H. Wu and C.-C. J. Kuo, “Reduced-rank space-time channel estimation for DS-CDMA in MIMO dispersive channels,” in Proc. IEEE VTC, Los Angles, Sep. 2004.
Standard Contribution papers:
S1. R4-070475, “HS-SCCH detection performance for HSDPA MIMO,” in 3GPP RAN4 meeting #43, Kobe, Japan, May 2007.
S2. R4-070476, “Modified FRC definitions and simulation results for 64QAM without implementation margin,” in 3GPP RAN4 meeting #43, Kobe, Japan, May 2007.
S3. R4-071170, ““HS-SCCH detection performance for HSDPA MIMO with implementation margin,” in 3GPP RAN4 meeting #44, Athen, Greece, Aug 2007
S4. R4-080217, “HS-PDSCH ideal simulation of 64QAM+MIMO”, in 3GPP RAN4 meeting #46, Sorrento, Italy, Feb 2008.
S5. R4-081083, “HS-PDSCH simulation results with implementation margin for 64QAM+MIMO”, to be in 3GPP RAN4 meeting #47, Kansas City, MO, May 2008.