| The synthetic aperture microwave radiometer has excellent characteristics of high resolution,which is at the cost of high complexity of the hardware system and cumbersome signal processing.In order to solve the problem of above problems of the traditional integrated aperture microwave radiometer,many parties have proposed effective solutions in reducing the complexity of hardware.Starting from the traditional integrated aperture imaging digital algorithm,this paper combines the delay correlation algorithm with the traditional synthetic aperture to solve the problem of excessive signal processing on the basis of the traditional synthetic aperture hardware.The main contents of this paper are as follows:(1)Based on the traditional synthetic aperture principle,the basic flow of the delay-time synthetic aperture algorithm is clarified from the perspective of the actual data processing algorithm.The delay-related synthetic aperture is described in the selfcorrelation function,visibility function,error correction and so on.The synthetic aperture algorithm has different places,and at the same time,it also makes a clear and specific explanation for the advantage of the delay-related synthetic aperture algorithm "reducing the number of correlations between data";(2)Taking the problem encountered in experiment as an opportunity,the relationship between the first zero point of the selfcorrelation function of the single channel signal and the basic delay time is explained in detail,and the correctness is proved by the experiment,and the antenna is also explained correspondence between array arrangement and delay addition autocorrelation function value;(3)The one-dimensional imaging results of time-delayed synthetic aperture simulation data and measured data are presented.The time-delayed synthetic aperture imaging of one-dimensional point source is taken as an example to analyze the data processing process of time-delayed synthetic aperture one-dimensional imaging.A detailed description is made,and the error of the imaging results related to the measured data delay is analyzed to some extent and a solution is given. |
