Patent ID: 8224627
Filing Date: 2012-07-17
Classification: G01S

Abstract:
1. A technique for determination of the signal subspace dimension K in direction of arrival (DOA) estimation and in exponentially damped sinusoids (EDS) modeling, two tasks where said signal subspace dimension K represents respectively the number of detected objects and the model order, and where the samples obtained by analog-to-digital conversion (ADC) of the sensors signals are put into a data matrix that is numerically processed through a computer needed to achieve the desired results of the DOA estimation or the EDS modeling in real-time, said technique comprising: (a) storing the samples obtained by said ADC of the sensors signals respectively into a complex-valued L×M data matrix X with L≧2 and M>>L in the DOA estimation, or into a complex or real-valued data vector x=[x (b) generating random numbers nu having real or complex normal distribution with zero mean and standard deviation σ=1 and storing them into a noise matrix N (c) computing the squared singular values σ (d) determining a standard deviation σ (e) computing the squared singular values σ