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2007•Radio Engineering of ChinaRequires access

Joint Estimation of TDOA and FDOA Based on Cepstrum Field Correlation

Bai Ru-long

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Abstract

A New algorithm for joint estimation of TDOA/FDOA has been proposed based on cepstrum field correlation in this paper.Meanwhile estimation of time delay and frequency shift between two signals received by two sensors platform are performed.Compared with traditional CAF methods based on second order (or fourth order) correlation,the new algorithm uses time domain convolution's equivalence to frequency domain production for reference,which makes frequency domain convolution equivalent to cepstrum domain correlation and converts TDOA/FDOA 2-dimension search problem into two 1-dimension search problems of FDOA first and then TDOA.Thus the fast joint estimation for TDOA/FDOA can be implemented.

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What this paper is about

A New algorithm for joint estimation of TDOA/FDOA has been proposed based on cepstrum field correlation in this paper.Meanwhile estimation of time delay and frequency shift between two signals received by two sensors platform are performed.Compared with traditional CAF methods based on second order (or fourth order) correlation,the new algorithm uses time domain convolution's equivalence to frequency domain production for reference,which makes frequency domain convolution equivalent to cepstrum domain correlation and converts TDOA/FDOA 2-dimension search problem into two 1-dimension search problems of FDOA first and then TDOA.Thus the fast joint estimation for TDOA/FDOA can be implemented.

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Available abstract

A New algorithm for joint estimation of TDOA/FDOA has been proposed based on cepstrum field correlation in this paper.Meanwhile estimation of time delay and frequency shift between two signals received by two sensors platform are performed.Compared with traditional CAF methods based on second order (or fourth order) correlation,the new algorithm uses time domain convolution's equivalence to frequency domain production for reference,which makes frequency domain convolution equivalent to cepstrum domain correlation and converts TDOA/FDOA 2-dimension search problem into two 1-dimension search problems of FDOA first and then TDOA.Thus the fast joint estimation for TDOA/FDOA can be implemented.

Key concepts: FDOA, Multilateration, Cepstrum, Convolution (computer science), Dimension (graph theory), Computer science, Frequency domain, Algorithm

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