Study Of Channelized Receiving Technology For Array Signal

With the improvement of digitization and informatization in modern wars,the research and application of array signal channelized receiving technology is more and more extensive.As an important part of passive seeker,digital channelized receiver's performance directly affects the system performance.In order to improve the frequency bandwidth and the estimation precision,this paper studies the technology of digital channelization and DOA estimation.At the same time,a small universal receiver module is designed and implemented.The following work has been completed:Firstly,the research background and significance of digital channelized receiving technology for array signal are expounded.The development status and trend of the digital channelized receiver and the direction of arrival estimation based on the array signal are investigated and the related technologies are briefly analyzed.Then,the digital channelized processing structure based on polyphase filtering is introduced in detail,and the characteristics of the false signal are analyzed.At the same time,the constant false alarm rate detector and frequency measurement technique are studied.The principle of the DOA measurement algorithm is introduced,including the preprocessing of decoherence and the real value and Jacobi algorithm for eigenvalues and engenvectors.This thesis proposes a channelized receiving strategy for array signal,with the characteristics of large bandwidth and high angle accuracy.Finally,we design and implement a hardware platform and software module for channelized receiver.The software module includes digital channelization and DOA estimation based spatial spectrum estimation.The thesis focuses on the research of the FPGA implemention of key modules,such as eigenvalue decomposition and spectral peak search in DOA estimation algorithm.The correctness of software module is verified by comparing with MATLAB simulation results.