The invention discloses a multi-probe spherical near-field sampling
system based on
compressed sensing and a test method, and belongs to the technical field of measurement. According to the method, the antenna transmission equation is expressed in a
matrix form, the unknown
transmission coefficient is solved from the linear equation set through the
matrix method, and the defect that a traditional spherical near-field test method based on FFT depends on the
distribution uniformity of near-field samples is overcome; according to the method, under the assumption that antenna transmission coefficients have sparsity, a
compressed sensing technology is introduced, L1
norm minimization constraint is applied to a
transmission coefficient vector q to ensure the sparsity of the
transmission coefficient vector q, and under the condition that the number M of spherical near-field samples is smaller than the number J of unknown coefficients, the transmission coefficients can be solved from an underdetermined linear equation set; according to the invention, on the basis of sampling coordinates obtained based on
prior information of an antenna, in combination with an adaptive positioning
algorithm, each probe is controlled to autonomously select an optimal path and move to a specified position along an annular frame to carry out interference-free sampling, so that
data acquisition of a pitching section at any angle is realized.