Date: October 1, 2004

Time: 3:00 pm

Location: GCATT Room 325

Speaker(s): Hua Qian

Title: Optimization of SNDR in the Presence of Amplitude Limited
Nonlinearity and Multipath Fading

Abstract:
Many physical devices in communication systems are intrinsically
nonlinear and as a result introduce some distortion. To address
the trade-off between maximizing the output power efficiency and minimizing the signal distortion, we consider the signal-to-distortion-and-noise ratio and the symbol-error-rate criteria. We show that a soft limiter with a specified gain offers an optimal solution when an amplitude constraint is presented at the transmitter for multipath fading channels. We present the optimization of the signal-to-noise-and-distortion ratio and the symbol-error-rate. Simulation results are provided to verify our approach.

Bio:
Hua Qian was born in Shanghai, China in 1976. He received the
Bachelor and Master degrees in electrical engineering from Tsinghua
University, Beijing, China in 1998 and 2000, respectively. He is currently
working toward the Ph.D. degree in electrical and computer engineering at
the Georgia Institute of Technology, Atlanta, Georgia, USA.
His general research interests are in the areas of circuits, systems, signal
processing and communications. Specific current interests include power
amplifier linearization and peak-to-average power ratio reduction
for multicarrier transmission.

Date:	October 1, 2004
Time:	3:00 pm
Location:	GCATT Room 325
Speaker(s):	Hua Qian
Title:	Optimization of SNDR in the Presence of Amplitude Limited Nonlinearity and Multipath Fading
Abstract:	Many physical devices in communication systems are intrinsically nonlinear and as a result introduce some distortion. To address the trade-off between maximizing the output power efficiency and minimizing the signal distortion, we consider the signal-to-distortion-and-noise ratio and the symbol-error-rate criteria. We show that a soft limiter with a specified gain offers an optimal solution when an amplitude constraint is presented at the transmitter for multipath fading channels. We present the optimization of the signal-to-noise-and-distortion ratio and the symbol-error-rate. Simulation results are provided to verify our approach.
Bio:	Hua Qian was born in Shanghai, China in 1976. He received the Bachelor and Master degrees in electrical engineering from Tsinghua University, Beijing, China in 1998 and 2000, respectively. He is currently working toward the Ph.D. degree in electrical and computer engineering at the Georgia Institute of Technology, Atlanta, Georgia, USA. His general research interests are in the areas of circuits, systems, signal processing and communications. Specific current interests include power amplifier linearization and peak-to-average power ratio reduction for multicarrier transmission.