Title :
Joint estimation and compensation for front-end imperfection in MB-OFDM UWB systems
Author :
Zhou, Jun ; Liu, Liang ; Ye, Fan ; Ren, Junyan
Author_Institution :
State-Key Lab. of ASIC & Syst., FUDAN Univ., Shanghai, China
fDate :
May 30 2010-June 2 2010
Abstract :
In this paper, we investigate the analog front-end imperfection in multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) systems and propose a joint estimation and compensation scheme. The estimation of CFO and SFO is presented on frequency domain, which is robust to frequency dependent I/Q imbalance. After that, I/Q imbalance and channel response is jointly estimated with partial compensation to CFO and SFO. Finally, pilot sub-carriers within OFDM symbols are used to track the residual phase distortion. Simulation results show that the proposed joint estimation and compensation scheme achieves 0.3dB SNR advantage in practical MB-OFDM UWB systems comparing to traditional joint estimation algorithm.
Keywords :
OFDM modulation; frequency-domain analysis; intercarrier interference; ultra wideband communication; CFO compensation; CFO estimation; I/Q imbalance; MB-OFDM UWB systems; SFO compensation; SFO estimation; carrier frequency offset; frequency domain analysis; multiband orthogonal frequency division multiplexing; sampling frequency offset; ultrawideband systems; Baseband; Frequency dependence; Frequency domain analysis; Frequency estimation; OFDM; Phase distortion; Robustness; Signal processing algorithms; State estimation; Ultra wideband technology;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5536946
