Design of new training sequence and estimation scheme for frequency dependent I/Q imbalance in MB-OFDM based UWB systems

Author

Zhou, Jun ; Liu, Liang ; Ye, Fan ; Ren, Junyan

Author_Institution

State-Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China

fYear

2009

fDate

20-23 Oct. 2009

Firstpage

509

Lastpage

512

Abstract

This paper analyzes the I/Q imbalance effect of direct-conversion receiver in wide-band wireless communication system and sets up frequency-selective I/Q imbalance model for ultra-wide band system. We design a new training sequence based on extra phase rotation and propose an estimation algorithm using diversity message introduced by I/Q imbalance during the demodulation process. Theoretical analysis and simulation results based on typical MB-OFDM based UWB system confirm that the estimation scheme proposed in this paper can achieve 5 dB EbNo advantage at PER=8%.

Keywords

OFDM modulation; ultra wideband communication; I/Q Imbalance; MB-OFDM; UWB systems; diversity message; estimation scheme; extra phase rotation; multi-band orthogonal frequency division multiplexing; training sequence; ultra-wide band system; wide-band wireless communication system; Algorithm design and analysis; Application specific integrated circuits; Computer aided manufacturing; Diversity methods; Frequency dependence; Frequency estimation; Integrated circuit technology; Phase estimation; Receivers; Signal processing algorithms; I/Q imbalance; UWB; diversity gain; phase rotation;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Conference_Location

Changsha, Hunan

Print_ISBN

978-1-4244-3868-6

Electronic_ISBN

978-1-4244-3870-9

Type

conf

DOI

10.1109/ASICON.2009.5351630

Filename

5351630