Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/17629
Title: Direction-Of-Arrival Estimation Using Multiple Sensors
Authors: LIM WEI YING
Keywords: Direction-of-arrival, pilot signals, narrowband, wideband
Issue Date: 19-Mar-2009
Source: LIM WEI YING (2009-03-19). Direction-Of-Arrival Estimation Using Multiple Sensors. ScholarBank@NUS Repository.
Abstract: This thesis proposes a narrowband method, termed the pilot-aided subarray (PAS) technique, utilizes a priori knowledge of incident signals to overcome problems associated with signal coherence. It performs close to the Cramer-Rao lower bound (CRLB) at low SNRs, for small array size and data samples. An iterative procedure is included to further resolve correlated signals. This technique, termed pilot-aided subarray iterative (PASI) technique, requires only a small number of iterations for accurate DOA estimates. This thesis also proposes a new coherent signal subspace method for wideband signals, termed the combined frequency signal subspace method (CFSSM), which does not require the focusing stage and thus computational complexity is greatly reduced. The method is extended to the case where a priori knowledge of the impinging signals is available and is termed modified M-CFSSM (M-CFSSM). Its detection performance is robust at low SNRs and its estimation performance is close to the CRLB.
URI: http://scholarbank.nus.edu.sg/handle/10635/17629
Appears in Collections:Ph.D Theses (Open)

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