| Under the gradually complicated situation of the electronic environment, electronic reconnaissance equipment should have several channels, wide banded and be digital, programmable, also should have entire probability interception capability. Analog receiver couldn't satisfy this development, as a result, the digital channelized receiver appears and develops quickly. As an entire probability interception receiver, it has been widely used in electronic reconnaissance filed. The channelized digital receiver uses poly phase filter banks to divide wide banded signal into multi-narrow band signals. And narrow band signals are easy to process, analysis, also can process multi signals in the same time. Therefore, it could be more validity, reliability to match the real-time digital signal processing.Respecting digital receiver's hardware resource and its capability, making use of poly filter's high efficient structure, this paper researches the digital channelized receiver based on poly phase filter banks which is an entire probability interception receiver, has low-complexity and simple to be realized. The digital channelized receiver has become an important tend in receiver field. Under the foundation of digital channelized receiver, change the channelized point to achieve alterable point channelization, so as to make it more flexibility and currency. Because this system should have flexible parallel processing ability, and have complex data processing, so using FPGA to realize this system.Finally, Combining the research background and according to correlative interferometer estimate method, putting forward to three channels'time-sharing multiplexing technology based on alterable point channelization; then adding phase compensation and flag switch to simulate nine flags'data. At first, the system is debuged with ChipScope Pro and Matlab, and then, the correlative interferometer results are studied to validate the correction of the channelization and polyphase modules.This thesis includes following contents, deducing and analyzing the efficient structure based on poly phase filter banks; using FPGA to realize alterable point channelization; making use of time-sharing multiplexing technology to achieve three channels'channelization; simulating phase compensation and flag switch; at last testing the whole system. |
