DOA matrix augmentation method based on angle and frequency joint estimation
A technology of joint estimation and matrix, which is applied to direction finders using radio waves, radio wave direction/bias determination systems, etc., to avoid polynomial search and achieve the effect of small computational complexity
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[0043] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0044] Symbol representation: use (·) in the present invention T Indicates the matrix transpose, ( ) H Represents matrix conjugate transpose, ( ) * Represents matrix conjugation, capital letter X represents matrix, lowercase letter x(·) represents vector, I represents identity matrix, diag(v) represents a diagonal matrix composed of elements in v, E[·] represents the expectation of the matrix, angle(·) represents the phase angle operation.
[0045] 1. Data model
[0046] The signal receiving array consists of figure 1 A non-uniform linear array is shown, the array has M sensors, and the distance between the mth sensor and the first sensor is d m (m=1,...,M), where ...
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