PROFESSIONAL SUMMARY
Currently working as a Sr. Electrical Scientist (postdoc) with over
ten years work experience in electrical engineering, incl. design and
measurement of RF circuits / antennas/ systems / networks.
. Design of RF/Microwave/Digital Components: Antenna/Array,
amplifier/LNA, RF filter, switches, PIN diode, mixer, converter, VCO,
PLL, ADC/DAC, and RF control circuits, RF-BB interface, DSP, FPGA;
EMC/EMI; EM simulation (HFSS, ADS, Genesys, PADS, CST, IE3D)
. Design & Measurement of Other RF and Optic Devices: MEMS, fiber,
laser, RFID
. Design & Measurement of Radio Systems: Transmitter/receiver for
Cellular radio system, SATCOM platform, Radar system, LMR, Soft-
defined radio/Cognitive radio / GPS / GNSS; Sch. & PCB design,
modulation/demodulation, decimation/interpolation filters, space-time
coding, OFDM, system integration, assembly & troubleshooting,
performance optimization, array/bearmforming application
. Design & Operating of Wireless Networks: Cellular(GSM, WCDMA, WiMAX,
LTE, WiFi, 3GPP/2), Satellite, Trunking, Public safety network (P25),
Mesh, Ad-Hoc, WLAN; planning and optimization; RF field predicting and
tuning, Link budget analysis, Array application, Interference
measurement/tracking, Spectrum management, Power control, Scheduling,
Routing, Security, and Throughput optimization
EDUCATION
. PhD (2005), Electrical Eng., Univ. of Electronic Science and
Technology of China (UESTC)
. MS (2002), Electrical Eng., Chongqing Univ. of Posts and
Telecomm.(CQUPT), China
. BS (1999), Electrical Eng., CQUPT
PROFESSIONAL EXPERIENCE
1. RF DEPART. (A defense company, NJ, USA, 07-10/2009)
Sr. RF Engineer
. Design of high power mechanical tuning filter/diplexer, RF
receiver/transmitter, DSP+FPGA
. Design of fast hopping RF filters (RF PIN-diode, helical/coaxial,
VHF/UHF) for military use
. Design of RF amplifier / antenna and digital control/sensor analog
circuitry for aircraft use
. Design of SatCom RF distribution system, system test, link analysis
and simulation
EM Simulation & Validation Tools: HFSS, Genesis, Matlab, ADS & emulation
platforms.
2. CENTER FOR ADVANCED COMMUNICATIONS (Villanova University, PA, USA,
09/2006-2010)
Sr. Electrical Scientist
. Design of multi-channel UHF receiver, data collection and signal
processing
. Design of RFIC (amplifier, filters, switches, PIN diode, mixers,
oscillator), DSP and FPGA
. R&D of antenna/array: novel antenna
(compact/conformal/reconfigurable/wideband, for cell phone, UAV,
satellite, aircrafts), performance optimization, non-uniform array,
pattern synthesis, array calibration, mutual coupling mitigation,
electronically scanned designs and optimization, test and simulation
(HFSS, CST)
. R&D of cooperative/distributed networks/public safety networks:
relay/distributed beamforming, relay selection, spatial-multiplexing,
MIMO, OFDM, opportunistic selection, optimum power allocation, high
throughput MAC, multi-beamforming, LMR, WiMax/LTE, RoIP, scheduling
etc.
. R&D of radio signal processing: radio channel estimation, signal
extraction/filtering/ fusion/identification, target
detection/tracking/positioning, radar signal processing, RFID
. Software for wave propagation modeling in UAV systems (multipath,
diversity, array application)
. Software for radio network optimization (scheduling, power allocation,
parameter tuning)
3. RESEARCH & INNOVATION CENTER (Alcatel-Lucent, Shanghai, 07/2005-08/2006)
Radio Scientist
. Design of MIMO-OFDM WiMax/LTE receiver/transmitter: general system
design, RF transceiver design and test, DSP+FPGA design,
PA/antenna/array design, simulation and troubleshooting
. Software for MIMO-OFDM transceiver: synchronization, channel
estimation (MMSE, LS), space-time coding/ decoding, power control
algorithm design; field test
. R&D of 3G/LTE wireless network planning and optimization: frequency /
code/capacity / topology/coverage planning, performance evaluation and
optimization, cross-layer optimization
. R&D of distributed antenna wireless networks (DAWN) (proof-of-concept)
. R&D of radio-over-fiber (RoF) and radio-over-IP (RoIP) techniques
(proof-of-concept)
. R&D of scheduling algorithms in wireless networks, P25, RoIP
. R&D of next-generation wireless backhaul solutions (proof-of-concept)
. R&D of soft-defined radio, cognitive radio and public safety networks
(proof-of-concept)
Primary Simulation Tools: ADS and Matlab, channel simulator, NS-2, and
OPNET.
4. UESTC (Chendu, 09/2002-07/2005)
Radio Scientist
. Design of antennas and arrays (patch, PIFA, yagi, bow-tie, LPDA,
compact / conformal / reconfigurable / wideband, PIN diode), array
synthesis, calibration, mutual coupling mitigation
. Design of RF filters (pseudo-elliptic), EMC / EMI filters
. Design of amplifiers (UHF) and other RF circuits, DSP, ARM, FPGA
. Design of MIMO receiver/transmitter, system test, troubleshooting,
field test, signal processing
. Design of algorithms for MIMO transceivers (space-time coding, channel
estimation)
. Measurement of radio MIMO channels (indoor and outdoor), propagation
prediction
. Design of radar imaging testbed: waveform design, GPR,
calibration/alignment, target detection, identification,
classification; wireless network planning
. Software for electromagnetic modeling and simulation (CEM), Radar RCS
prediction
Primary Simulation & Validation Tools: HFSS, CST, Matlab, FEKO, and ADS.
5. CENTER FOR MOBILE COMMUNICATIONS (CQUPT, Chongqing, 09/1995-07/2001)
Electrical Engineer
. Design of analog and digital circuits for RFIC, power electronics and
cell phones (antennas, arrays, amplifiers, filters, switches, PIN,
mixers, ADC-DAC, MCU, DSP, and FPGA)
. Integration and troubleshooting of analog & digital circuit systems
(Schematics and PCB design)
. Design of control software and hardware for electronic products
. Design of dual-mode cell phones, RF receiver/transmitter (CDMA/GSM);
Satcom platform
. Design and measurement of antennas for cell phones and other radio
products
. Wireless network planning and optimization (GSM/CDMA/UMTS)
. Design of software for wave coverage prediction and link budget
analysis
INVITED PROJECTS
a) SEEKON MICROWAVE COMMUNICATIONS INC. (Chengdu, 08-12/2002)
Electrical Scientist
. Design and measurement of high-power WCDMA BS duplexer/filters
. Design of GSM/CDMA repeater system (Schematics and PCB design), RF
circuit design
. Group leader
b) HOLLEY COMMUNICATIONS INC. (Hangzhou, 01-07/2002)
RF Engineer
. Design of RF Block (amplifier, mixer, & filter) for CDMA cell phone
cooperated with several R&D branches at Vancouver in Canada and Dallas
and San Diego in US
. Design and measurement of cell phone antennas (helix), circuit design
. Test of cell phones (Schematics and PCB design), field test
. Design of amplifiers for cell phones, RF receiver/transmitter
. Design of power control algorithms for cell phone
Primary Simulation & Validation Tools: HFSS, ADS and hardware
platform.
c) CHONGQING JINMEI COMMUNICATIONS INC. (Chongqing, 03/2001-01/2002)
Electrical Engineer
. Design of high-power electronic-tuning filters (cavity)
. Design of embedded software for e-filters (PIN, varactor, MCU)
EM & Validation Tools: HFSS and ADS
d) DATANG TELECOMMUNICATIONS TECHNOLOGY INC. (Beijing, 11/1999-04/2001)
Electrical Engineer
. Drafting and revising China's 3G mobile communication standard (TD-
SCDMA)
. Design of testbed for TD-SCDMA (Schematics and PCB design),
circuit/antenna design
. Design of dual mode demonstrator, RF receiver/transmitter (TD-SCDMA/
GSM), DSP+FPGA
. Design and system integration of RF IC & transceiver (amplifier,
mixer, filters, PIN, etc.)
. Measurement of 3G channels, field test
. 3G wireless network planning and optimization, WCDMA, CDMA2000
. Design of power amplifiers for cell phone and base stations
Simulation Tools: ADS and Matlab
Soft/Tools
HFSS, Matlab, CST, ADS, MWO, FEKO, Protel (PCB layout), PADS, Genesys,
AutoCAD, C/C++, VB, SQL, Perl,
Signal generator, spectrum analyzer, network analyzer, oscilloscope,
multimeter, soldering, etc.
Languages
Fluent in Chinese and English, basic knowledge of Japanese.
Patents
1] Zaiping. Nie and Xin. Li, Method and apparatus for designing and
creating cross-coupling in filters, Chinese patent, No.200*********.X.
2] Zaiping. Nie, Xin. Li, Xiyu. Zhang, Base station diversity antenna
apparatus for MIMO wireless communications, Chinese patent,
No.200420060430.4.
3] Zaiping. Nie and Xin. Li, Diversity antenna apparatus for wireless
communication terminals, Chinese patent, No.200420060429.1.
4] Zaiping. Nie and Xin. Li, Wearable diversity antenna apparatus for
wireless communication terminals, Chinese patent, 200420060656.4.
5] Xin. Li, Filters with quasi-elliptic response, Chinese patent, No.ZL
03232707.2.
END