Xin Yu

Stuttgart, Germany
Research engineer (Wireless)


Friedrich-Alexander-University, Erlangen-Nuernberg, Germany Jul. 2008-Jul.2012 

Ph.D., Electrical Engineering. 

Dissertation Title: “Contributions to Digital Predistortion of Radio-Frequency Power 

Amplifiers for Wireless Applications,“

University Stuttgart, Stuttgart, Germany Oct. 2002-Aug.2006 

Master of Science, Electrical Engineering. 

Zhejiang University, Zhejiang, China Sep.1997 – Jul.2001 

Bachelor of Science, Electrical Engineering. 


Xin Yu was born in Shanghai, China, in 1978. He received the M.S. degree in electrical engineering at the University of Stuttgart, Stuttgart, Germany and the Ph.D. degree from University of
Erlangen-Nuernberg Germany. He is an employee in Alcatel-Lucent Bell Labs in Stuttgart, Germany. His research interests include wireless communication, modeling and compensation of nonlinear effects in transmitter, and optical link.

Professional Activities

Research on signal conditioning 
• Modeling of power amplifiers with memory effects for UMTS and LTE applications 
• Developing digital predistortion (DPD) algorithms for single band and multi-bands 
• Developing I/Q Imbalance compensation for zero IF transmitter 
• Developing algorithms for Peak to average power (PAPR) reduction 
Research on high efficiency high performance transmitters 
• Developing signal conditioning algorithm for high efficiency PA such as Envelope 
Tracking and Digital Doherty 
• Optimization of transmitter efficiency regarding wireless traffic load 
Research on all digital transceivers 
• Investigation of signal modulation methods (DSM, PWM) 
• Developing digital predistortion for switch mode power amplifier (SMPA) 
Hardware Implementation 
• VHDL programming for signal conditionings with Virtex 6, ML605 evaluation board 

Selected Articles and Publications

Journal Articles:

  • X. Yu, and H. Jiang, “Digital Predistortion Using Adaptive Basis Functions,” IEEE Transactions on Circuits and System I, Vol. 60, pp 3317-3327, Dec. 2013
  • H. Jiang, X. Yu, and P. Wilford, “Digital Predistortion using Stochastic Conjugate Gradient Method,” IEEE Transactions on Broadcasting, Vol. 58, pp 2726-2737, Mar. 2012


Conference Papers:

  1. S. Maier, X. Yu, H. Heimpel, and A. Pascht, “Wideband base station receiver with analog-digital conversion based on RF pulse width modulation,” Microwave Symposium Digest(IMS), 2013 IEEE MTT-S international, pp. 1-3, 2013.
  2. X. Yu, “Digital Predistortion using Feedback Signal with Incomplete Spectral Information,” Microwave conference Proceedings (APMC), 2012 Asia-Pacific, pp. 950-952, Dec. 2012.
  3. D. Ferling, P. Jueschke, X. Yu, T. Bohn, A. Ambrosy, Y. Fernandez, A. Erdem, and A. Pascht, “Power Saving by Sleep Modes in Base Station Transceivers for LTE,” Microwave conference Proceedings (APMC), 2012 Asia-Pacific, pp. 947-949, Dec. 2012.
  4. X. Yu and H. Jiang “Digital Predistortion using adaptive basis functions,” Asia-Pacific Microwave Conference, pp. 13-16, Dec. 2010.
  5. H. Jiang, P. Wilford and X. YU, “Digital predistortion using stochastic conjugate gradient method” Communications and Networking in China, 2010 5th International ICST Conference on, pp. 1-5, Aug. 2010.
  6. X. Yu, “Stability Enhancement of Digital Predistortion through Iterative Method to Solve System of Equations,” Asia-Pacific Microwave Conference, pp. 1-4, Dec. 2008.


  • X. Yu, B. Thmas, and H. Schlessinger, “Cross-talk cancellation in a multiband transceiver,” WO2013156189(A1), Oct. 2013.
  •  X. Yu, Y. Chen, and H, Heimpel, “Signal processing device and method of processing at least two input signals for a transmitter of a communications device, ” EP2706714(A1), Mar. 2014.
  • X. Yu, and W. James, “Amplifier circuit,” EP2658116(A1), Oct. 2013. 
  • C. Haslach, A. Frotzscher, D. Markert, and X. Yu, “A method for pulse width modulation of a signal,” EP2670101(A1), Dec. 2013.
  • T, Bohn, C. Haslach, X. Yu, and L. Gerhard, “Method for amplifying a signal by a power amplifier, power amplifier system, device, computer program product, and digital storage medium thereof,” US8536940 (B2); EP2226932 (A1); EP2226932 (B1); KR20110111519 (A); JP2012519441 (A); WO2010100016 (A1), CN102308473 (A), Jan. 2012.
  • C. Haslach, D. Markert, A. Frotzscher, and X. Yu, “A method for pulse width modulation, and a transmitter therefor,” EP2575309(A1), Apr. 2013.
  • C. Haslach, D. Markert, A. Frotzscher, and X. Yu, “A method for signal amplification based on pulse width modulation,” EP2573938(A1), Mar. 2013.
  • X. Yu, and T. Bohn, “Amplifier system and method of operating an amplifier system,” EP2479889(A1), Jul. 2012.
  • X. Yu, T. Bohn, and C. Haslach, “Cooperating cluster for wireless transmissions,” EP2477343(A1), Jul. 2012.
  • X. Yu, T. Bohn, C. Haslach, and L. Gerhard “Control unit for a power amplifier and method of operating a control unit for a power amplifier,” EP2442440(A1), Apr. 2012.
  • X. Yu, T. Bohn, and C. Haslach, “Digital predistortion device and method of operating a digital predistortion device,” EP2448112(A1), May 2012.
  • X. Yu, “A method for calculating predistortion parameters, a transmitter, a base station, a mobile station, and a communication network therefor,” EP2146474(A1), Jan. 2010.