Title :
An improving beam-space MUSIC time delay estimation algorithm for OFDM signal
Author :
Zhou Fei ; Wang Lu-kai ; Fan Xin-yue
Author_Institution :
Inst. of Wireless Location & Space Meas., Chongqing Univ. of Posts & Telecommun., Chongqing, China
Abstract :
To get a high precision of TOA estimation for the location based services (LBS) in OFDM wireless network, beam-space MUSIC algorithm is used in multi-path channels. Meanwhile, in order to improve anti-noise performance, a modified algorithm based on Teager-Kaiser (TK) operator is proposed. Due to subchip resolution capability and sensitive to the change of data´s amplitude, TK operator processes the cross-correlation function firstly. Then the TOA is estimated by beam-space MUSIC algorithm. Stimulation results show that the noise mitigation of proposed algorithm has been improved. It could estimate the TOA accurately in lower SNR environment. The distinguish probability is more robust. The performance of high-resolution estimation has been improved.
Keywords :
OFDM modulation; multipath channels; signal classification; time-of-arrival estimation; OFDM signal; OFDM wireless network; TOA estimation; Teager-Kaiser operator; antinoise performance; beam-space MUSIC; cross-correlation function; location based services; multipath channels; time delay estimation; Delay effects; Estimation; Multiple signal classification; OFDM; Signal to noise ratio; Time of arrival estimation; OFDM; TK operator; TOA estimation; beam-space MUSIC algorithm;
Conference_Titel :
Fuzzy Systems and Knowledge Discovery (FSKD), 2012 9th International Conference on
Conference_Location :
Sichuan
Print_ISBN :
978-1-4673-0025-4
DOI :
10.1109/FSKD.2012.6234144
