Date: February 4, 2005

Time: 3:00 pm

Location: GCATT Room 325

Speaker(s): Hua Qian

Title: Dynamic Selected Mapping for OFDM

Abstract:
Orthogonal frequency division multiplexing (OFDM) transmission systems generally have low power efficiency, due to the large peak-to-average power ratio (PAR) of the OFDM signal. Selected mapping (SLM) is a promising technique to reduce the PAR for OFDM. A drawback of SLM is its high computational requirement, which hinders its practical implementation. In this paper, we propose a dynamic, two-buffer structure to reduce the computational requirement without sacrificing the PAR reduction capability. Performance analysis and simulations of the proposed technique are also carried out.

Bio:
Hua Qian was born in Shanghai, China in 1976. He received 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 and (W)CDMA signals.

Date:	February 4, 2005
Time:	3:00 pm
Location:	GCATT Room 325
Speaker(s):	Hua Qian
Title:	Dynamic Selected Mapping for OFDM
Abstract:	Orthogonal frequency division multiplexing (OFDM) transmission systems generally have low power efficiency, due to the large peak-to-average power ratio (PAR) of the OFDM signal. Selected mapping (SLM) is a promising technique to reduce the PAR for OFDM. A drawback of SLM is its high computational requirement, which hinders its practical implementation. In this paper, we propose a dynamic, two-buffer structure to reduce the computational requirement without sacrificing the PAR reduction capability. Performance analysis and simulations of the proposed technique are also carried out.
Bio:	Hua Qian was born in Shanghai, China in 1976. He received 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 and (W)CDMA signals.