Parameter Measurement And Tracking Research For The Bistatic MIMO Radar

Bistatic MIMO radar is a new radar system, which has got the wide attation of the scholar. The bistatic radar has the advantages of anti-jamming, resisting anti-radiation missile; Multiple input multiple output signal has the characteristics of expanding the antenna aperture, improving the target detection performance and parameter measurement performance. Combining the theory analysis with simulation experiment, the paper studies bistatic MIMO radar parameter measurement and tracking problem. Main contents and conclution are as follows:(1)In the background of bistatic MIMO radar, the paper introduces the bistatic radar geometrical relationship, the disposition characteristic and an orthogonal coded signal as the radiation of the MIMO radar signal processing model. The chapter introduces monopulse angle and distance measuring principle about bistatic radar. These principles provide reliable theoretical support for this paper.(2) For further research on monopulse angle measuring, the paper discusses the influence of different conditions on the direction graph. Different division of transmitting subarray does not affect the joint direction figure. Unit lobe effect almost does not affect the pattern relative distribution characteristic. Phase error has the heavier influence on pattern than the amplitude error. It deduces the theoretical formula of monopulse angle measuring precision. It is shown that the more subarray division, the higher signal-to-noise ratio, the higher angle measurement. The simulation experiment verifies the correctness of the theoretical derivation. The receiving data can compute the transmitting angle. For coherent signals, the paper proposes a solution of coherent angle measuring algorithm. The simulation results show the effectiveness of the algorithm and the advantages of MIMO system.(3) Based on the characteristics of bistatic MIMO radar measurement parameters, combining the theoretical with simulation analysis, the paper discusses the CRB of spatial positioning accuracy under three sets of measurement subset. It is found that position precision of measurement subset with only angle parameter is lower than the other subset. Then, the paper puts forward three kinds of scheme optimization space positioning accuracy. Positioning accuracy of any kind of method is higher than positioning accuracy of a single measurement subset. Using overdetermined equations method, the paper discusses precision of positioning accuracy with the different baseline length and the parameter precision.(4) This paper overviews the development of the tracking algorithm from the target, environment, equipment and measuring. It analyzes the classical kalman algorithm and unscented kalman algorithm. Based on simulation platform it discusses the characteristics of horizontal and vertical array track. Considering the requirement of engineering application, alternate array tracking model is given. And according to data fusion, the new tracking algorithm is proposed. The simulation results verify the validity and superiority of the algorithm.