Aperture and Receiver Technology. Delivery Order 0002: Bandwidth Invariant Spatial Processing. Volume 2. Digital Signal Processor (DSP) Based Implementation of Direction of Arrival (DOA) for Wideband Sources
Final rept. 21 Dec 2005-31 May 2007
TOLEDO UNIV OH DEPARTMENT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
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Sensor arrays are used in many digital signal processing applications due to their ability to locate signal sources. For most of these applications, it is necessary to estimate the Direction of Arrival DOA of the sources. Numerous algorithms have been developed, but most of them focus on narrowband signals where the time delay can be approximated as a phase shift. This thesis focuses on the coherent signal subspace method for DOA estimation of wideband sources. However, the coherent signal subspace method has high computational requirements that prevented its use in many real-time applications. With the growth in technology, its now possible to implement these algorithms in real-time embedded systems. These array signal processing algorithms can be implemented in hardware using Digital Signal Processors DSP, Field Programmable Gate Arrays FPGA, and Application-Specific Integrated Circuits ASIC. DSPs offer flexibility and also the best development time and cost with proper use of high-level programming. In this thesis, we propose a DSP based architecture for detecting and estimating the DOA of wideband sources. Also, a parallelized algorithm is presented and its performance is evaluated with respect to the original architecture.
- Computer Programming and Software
- Computer Hardware
- Miscellaneous Detection and Detectors