Circular array beam forming method based on particle swarm optimization

The invention discloses a circular array beam forming method based on particle swarm optimization. The method comprises the steps of uniform circular array signal receiving, virtual linear array datagenerating, array element signal model parameter optimal estimating, virtual uniform linear array expanding, self-adaptive beam forming and the like. According to the circular array beam forming method based on particle swarm optimization provided by the invention, uniform circular array data is converted into a virtual uniform linear array data form by performing mode space conversion on an output signal of an uniform circular array according to a characteristic of uniform circular array data receiving. Optimal estimation of signal model parameters of each array element of the virtual uniformlinear array is realized by using a particle swarm optimization algorithm, and expanded array elements are formed by using parameter estimation values so that the number of the array elements and anaperture scale are increase