If Digital Receiver Channel

The hardware of traditional radio stations is lack of scalability and portability, which can achieve a single function. The software radio broke the limitations of this design. It emphasized to realize a variety of wireless communication on an opening and blocking currency hardware platform, with scalable, reconfigurable application software. The channelized digital receiver which is based on this idea is excellent on wide-band frequency coverage, ditital processing, software programming, high dynamic range, receiving signal with all probability, simultaneous signal detection and so on. According to the different communication needs and standards, Sub-channels have different distribution, then there are different architecture of channelized receiver to processing Multi-channel signal. At the same time, the development of filter banks and other related technologies provide new channelized receiver structure more possible.In this dissertation, firstly we made a comprehensive discussion about the development of SDR and channlized receiver. And then we introduced the basic theory of digital receiver, such as the technique of sample, multirate signal processing, digital down coverter, and so on. Based on upper study we discussed the channelized receiver architectures based DFT polyphase filter banks, in view of different sub-channel distribution, deduced and established several kinds channelized digital receiver mathematic models for real signal. Then we analyzed these architectures'efficiency and computing complexity, the MATLAB simulation of the most efficient architecture testified its correctness. At last, we used Instantaneous Frequency Measurement Technology to design a channelized receiver program without blind zone, and testified its correctness through MATLAB simulation.