Title :
Accurate Time-Delay Estimation and Alignment for RF Power Amplifier/Transmitter Characterization
Author :
Liu, Taijun ; Ye, Yan ; Zeng, Xingbin ; Ghannouchi, Fadhel M.
Author_Institution :
Coll. of Inf. Sci. & Eng., Ningbo Univ., Ningbo
Abstract :
This paper presents a cross-covariance-based time- delay estimation method for accurate determination of the time- delay between the input and the output of a RF power amplifier/transmitter. In order to overcome the time resolution limitation caused by the relative low sampling rate of the analog- to-digital converter in the baseband signal acquisition system, the Lagrange interpolation is utilized to improve the time resolution. A two-step method for time-delay estimation/alignment is proposed to increase the dynamic range for time-delay estimation/alignment under the certain computation resource consumption condition. The experimental validation results have been provided to illustrate the effectiveness of the proposed approach for accurate time-delay estimation and alignment.
Keywords :
analogue-digital conversion; covariance analysis; interpolation; iterative methods; power amplifiers; radio transmitters; radiofrequency amplifiers; signal detection; signal resolution; signal sampling; Lagrange interpolation; RF power amplifier; RF power transmitter; analog-to-digital converter; baseband signal acquisition system; cross covariance-based time-delay estimation; resource consumption; sampling method; time resolution limitation; time-delay alignment; two-step method; Baseband; Delay estimation; Interpolation; Lagrangian functions; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Sampling methods; Signal resolution; Transmitters;
Conference_Titel :
Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1707-0
Electronic_ISBN :
978-1-4244-1708-7
DOI :
10.1109/ICCSC.2008.22
