Method, system, and intelligent terminal for one-bit quantization direction of arrival estimation

A method comprising:

• receiving, when a quantity of far-field and uncorrelated spatial narrow-band source signals are incident from different directions to a uniform linear array receiver, the narrow-band source signals by a quantity of antenna array elements;
• expressing signals received at different times in matrix form, wherein output signals of the quantity of antenna array elements are expressed in vector form;
• performing one-bit quantization on the received signals;
• re-modeling the received signals after quantization to obtain a joint probability mass model of one-bit quantization Direction of Arrival (DoA) estimation;
• deriving estimated parameters based on the joint probability mass model of the one-bit quantization DoA estimation;
• constructing, based on a maximum likelihood principle and a spatial row sparse property, an optimization model based on the maximum likelihood principle by using the estimated parameters;
• obtaining, based on the optimization model, a steepest descent direction of the optimization model;
• and
• solving, based on the steepest descent direction of the optimization model, the optimization model by a steepest descent method to obtain both an estimated DoA and a source number;
• and
• reporting both the estimated DoA and the source number to a radar system.