Direction-of-arrival Methods Doa And Time Difference Of Arrival Tdoa Position Location Technique
January 1, 2005 - Elkamchouchi, H.; Mofeed, M.A.E.
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EmailJournal or Book Title: Proceedings of the Twenty-Second National Radio Science Conference (IEEE Cat. No. 05EX1047)
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Year Published: 2005
This paper provides a detailed overview of the various methods for estimation of direction-of-arrival (also called angle-of-arrival) of a radio signal using an antenna array. The array-based directional-of-arrival (DOA) estimation techniques considered here are broadly divided into two different types: conventional techniques, and subspace based techniques. Conventional methods are based on classical beam forming techniques and require a large number of elements to achieve high resolution. Subspace based methods are high resolution sub-optimal techniques which exploit the eigen structure of the input data matrix. This paper also uses the time-difference-of-arrival (TDOA) technique for estimating the time difference between the received signals to base stations of a certain subscriber using the generalized cross correlation method. The Fang's method and Chan's method are used in solving the resulting hyperbolic equations for finding the position location (PL) of a certain subscriber. The Fang's method and Chan's method give accurate and same result. This means that, an accurate position location estimation of a certain subscriber requires an efficient hyperbolic position location estimation method. The paper also clarifies that a more data samples give a more accurate result.
Type of Publication: Conference Paper
