Title :
A multipath delay estimation model and algorithm in OFDM systems
Author :
Ya-jun Chen ; Jian-hua Peng ; Kai-zhi Huang ; Xiao-rui Gong
Author_Institution :
Nat. Digital Switching Syst. Eng. & Technol. Res. Center, Zhengzhou, China
Abstract :
In wireless location area, the estimation precision of the TOA (the time of arrival) is low because it underutilizes the time-frequency characteristics of the OFDM signal in the OFDM system. To solve this problem, in this paper, a multipath delay estimation model based on frequency domain phase offset (FDP-MDE) is proposed. And then, a grouped joint time delay estimation algorithm (GJ-TDE) is proposed according to features of the LTE system. Simulation results show that the root mean square error (RMSE) of the GJ-TDE algorithm is 5.5034m smaller than that of the synchronization algorithm under the condition that the signal-to-noise ratio (SNR) is 0dB and the sampling interval is 8.
Keywords :
OFDM modulation; delay estimation; mean square error methods; time-of-arrival estimation; OFDM systems; TOA; frequency domain phase offset; grouped joint time delay estimation algorithm; multipath delay estimation model; root mean square error; time of arrival; wireless location area; Covariance matrices; Delay estimation; Estimation; Frequency-domain analysis; OFDM; Signal processing algorithms; grouped joint time delay estimation (GJ-TDE); root mean square error (RMSE); sampling interval; the OFDM system;
Conference_Titel :
Information Science and Technology (ICIST), 2014 4th IEEE International Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/ICIST.2014.6920351
