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Direction-of-Arrival Tracking Scheme for DS/CDMA Systems: Direction Lock Loop
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- Authors
- Issue Date
- 2004-01
- Citation
- IEEE Trans. Wireless Commun., vol. 3, pp. 191-202, Jan. 2004
- Keywords
- Array response vector ; direction of arrival (DOA) ; direction lock loop (DiLL) ; DOA tracking, direct-sequence codedivision multiple access (DS/CDMA) ; smart antenna
- Abstract
- In this paper, a new direction-of-arrival (DOA)
tracking algorithm, direction lock loop (DiLL), is proposed for
wireless direct-sequence code-division multiple-access systems. It
has a similar concept to the delay lock loop that is used for timing
synchronization. It may track the DOA of sources by iterations.
Its computational requirements are + O( ) for coherent
DiLL and 2 + O( ) for noncoherent DiLL, where is
the number of antenna elements and is the number of signal
sources, which is less than that of the projection approximation
subspace tracking with deflation algorithm [5]. The DOA tracking
accuracy is demonstrated by analysis and computer simulations.
- ISSN
- 1536-1276
- Language
- English
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