Research And Realization On Ambiguity Resolution Techniques Of Digital Beam Forming

Under the condition of having no change in number and position of array, there are always ambiguities with the result of DOA by using phase interferometer if wide-band signal is to be received. Although the ambiguity problem can be solved by application of multi-baseline during a certain frequency range, the method itself has no more competence for much wider band. The technology of digital multi-beam forming is successful introduced to ambiguity resolution of Digital multi-beam forming which is a new kind of technology is base on the theory of antenna beam forming, also combines with array signal processing and advanced digital signal processing. This kind of technology can achieve beam-scanning and beam-forming conveniently by fully utilizing interspace information. The process of digital multi-beam forming, the reason of ambiguity of interferometer and both of the software and hardware of the system are mostly expatiated in the dissertation, besides that, the detailed process and correlative method of ambiguity resolution under the frame of FPGA with DSP are described totally. The method that dissertation mentioned is proved by simulation and system debugging.