| Abstract: | Passive radar imaging uses multiple transmitters and receivers to image the same target from multiple angles simultaneously, so that obtains rich information. It is one of the current research hotspots in the field of radar imaging. The paper analyzes the factors of passive radar imaging performance. Starting from the spatial three-dimensional configuration composed of multiple transmitters, multiple receivers and targets,the echo model is established,and the space-spectrum domain mapping relationship between the echo and the point scattering function is derived. Taking the BeiDou satellites transmitters as an example, the back projection algorithm is used to perform imaging on multiple point targets. Simulation experiments effectively verify the relationship between space-spectrum filling and imaging quality from three aspects: the number of transmitters and receivers, the arrangement interval of transmitters and receivers, and the configuration of transmitters and receivers.The paper provides theoretical support for the design of subsequent passive radar imaging systems. |
