Patent ID: 7999739
Filing Date: 2011-08-16
Classification: G01S

Abstract:
1. A goniometry method of determining incidence parameters θ mp and Δ mp and deflection parameters δθ mp and δΔ mp of a diffusion cone, the diffusion cone being a model representing signals originated from a transmitter via a path to an array of sensors, the method comprising: receiving, by the sensors, the signals originated from the transmitter via the path; arranging the received signals according to an equation: the diffusion cone being represented by L diffusers, and the ith diffuser having parameters (θ mp , δθ mpi , Δ mp , δΔ mpi ), where a(θ mp +δθ mpi , Δ mp +δΔ mpi ) represent a directing vector associated with the ith diffuser, θ mp is the incidence angle in azimuth for the transmitter, δθ mpi is the offset in azimuthal angle of incidence corresponding to the ith diffuser, Δ mp is the elevation angle of incidence for the transmitter, δΔ mpi is the offset in elevational angle of incidence corresponding to the ith diffuser, τ represents delays, f represents Doppler shifts, and ρ represents attenuation; deriving a vector D(θ, Δ, δθ, δΔ) α by combining the directing vectors associated with the L diffusers or deriving a vector U(θ, Δ) β (δθ, δΔ, α) according to a directing vector a(θ, Δ) and derivatives of the directing vector a(θ, Δ), where α represents a combination vector associated with the L diffusers; applying a MUSIC-type goniometry algorithm based on the vector D(θ, Δ, δθ, δΔ) α or the vector U(θ, Δ) β (δθ, δΔ, α) to determine at least one of the parameters θ