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Cramer-Rao Low Bound for Location and Time Delay Estimation Algorithm in Multi-User Environments

Zhu Zhong-liang

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Abstract

In this paper,the Cramer-Rao low bound (CRLB) for mobile station location based on time of arrival (TOA) in CDMA system is obtained.The detailed deduction and the expression of CRLB are showed and the physical interpretation is discussed.From the CRLB,the conclusion that the CRLB for location is not related with user's numbers is obtained.A new time delay estimation algorithm which can restrain muti-user interferes (MUI) is raised.The method explains the CRLB more sufficiently.The paper discusses some numerical examples based on simulation experiments.

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What this paper is about

In this paper,the Cramer-Rao low bound (CRLB) for mobile station location based on time of arrival (TOA) in CDMA system is obtained.The detailed deduction and the expression of CRLB are showed and the physical interpretation is discussed.From the CRLB,the conclusion that the CRLB for location is not related with user's numbers is obtained.A new time delay estimation algorithm which can restrain muti-user interferes (MUI) is raised.The method explains the CRLB more sufficiently.The paper discusses some numerical examples based on simulation experiments.

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Available abstract

In this paper,the Cramer-Rao low bound (CRLB) for mobile station location based on time of arrival (TOA) in CDMA system is obtained.The detailed deduction and the expression of CRLB are showed and the physical interpretation is discussed.From the CRLB,the conclusion that the CRLB for location is not related with user's numbers is obtained.A new time delay estimation algorithm which can restrain muti-user interferes (MUI) is raised.The method explains the CRLB more sufficiently.The paper discusses some numerical examples based on simulation experiments.

Key concepts: Cramér–Rao bound, Upper and lower bounds, Algorithm, Computer science, Estimation theory, Mathematics, Mathematical analysis

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