Research MIMO Radar Signal Processing And Array Design Technology Bistatic

Bistatic MIMO radar is a new kind of radar system developed in recent years, which has become one of current hot problems in the domain of radar and has a broad prospect of application. Bistatic MIMO radar combines the technical features of bistatic radar and MIMO radar, so it has many potential advantages such as strong anti-interference ability, strong anti-reconnaissance and anti-stealth capability and so on. By observing the current research trends, we can find that the target detection, the estimations of the parameters, target localization and array design have become the main studied questions of bistatic MIMO radar. Since target localization in space needs to estimate the target’s multidimensional angles, complex array antenna is generally used. In this dissertation, bistatic MIMO radar is the research object, and its basic principle, parameters estimation, target localization and array design are studied. In this dissertation, MATLAB simulation is used to test and verify the theories, and the main research work is listed as follows.The working principle of ULA bistatic MIMO radar is analyzed, including transmitted signal model, multi-target echo signal model and matched filtering processing. On the basis of analysis, signal processing procedure and performance features of bistatic MIMO radar are given.Basing on ULA, angle estimation of bistatic MIMO radar using ESPRIT algorithm is discussed. Basing on L array, application of Third-order Tensor Decomposition in three-dimensional angle estimation, Doppler frequency estimation and target localization of bistatic MIMO radar is studied. The simulation results show that either of the two algorithms can estimate angles of multiple targets effectively. Third-order Tensor Decomposition is valid in estimating target Doppler frequency, and can automatically pair Doppler frequency with the DOD and DOA. The algorithm basing on Third-order Tensor Decomposition avoids the covariance matrix estimation in ESPRIT, so it effectively reduces the amount of computation and storage capacity while ensuring a good target parameter estimation accuracy.Localization accuracy GDOP of bistatic MIMO radar is analyzed. Basing on the result array design of bistatic MIMO radar is studied, and finally reasonable array design of bistatic MIMO radar is given.