Transforming And Picking-up Signal Base On The Sampling

Array processing technique has been one of the focuses in signal processing field, By sampling and processing signal both in time domain and spatial domain, the information of interest contained in signal can be exploited fully, thereby interference can be suppressed more effectively. Spatial spectrum estimation technique has been developing fast in past 40 years. It has been used widely in mobile communication, radar and so on.In this dissertation, the model and theory of array signal processing are studied firstly, and then, the conventionally beam forming (CBF) and some classical arithmetic are introduced.In order to estimate the DOA of signal in a wide frequency band, Array configuration for NLA was studied. Compare to ULA, it has many advantages. For example, the number of the signals estimating can bigger than the number of the array. So NLA will widely used in practically.Sometimes, the antenna array is only needed to have narrow scan beam, but not need the corresponding plus, such as the satellite-incept-antenna against environment interference,The high frequency floor radar antenna and so on. Width of beam relates with the size of array. Plus is relative with the irradiation area, so we can use thinned array to solve these problems. This paper points out a new interpolation method and proves the method right and feasibility by the computer simulation.