Letter Channelized Digital Receiver Technology

The basis idea of software radio (SRD) is to place the A/D and D/A close up the antenna as possible as and use software to realize all the function of any radio based on an opening and blocking currency hardware platform. The channelized digital receiver based on SRD is the electronic equipment, which can be used in communication and military affairs, because of its excellence on wide band frequency coverage, digital processing, software programming, high dynamic range, receiving signal with all probability, simultaneous signal detection and so on.In this dissertation, we mainly study the efficient architecture of channelized digital receiver, discuss the particular realization approaches,then testify them with simulation. Above all, the basic theory of digital receiver, such as the technique of sample, multirate signal processing, digital down converter, is introduced. Based on upper study deeply the efficient digital channelized architectures based DFT polyphase filter banks to deduce and establish several kinds channelized digital receiver mathematic models for real signal. Not only we analyze these architectures'efficiency and computing complexity,but also complete the 8-band parallel processing receiver's computer simulation and FPGA realization to testify the architectures are correct and hardware realizable. This dissertation investigates primarily the channelized receiver's application in electronic reconnaissance,and puts forward a project of the wideband signal reconstruction system including 4-band efficient channelized receivers and a project which is 8-band efficient digital channelized IFM receiver ,then testifies them with simulation.