Universal type digital intermediate frequency receiver

Abstract

The invention discloses a digital intermediate frequency receiver. The digital intermediate frequency receiver comprises a multichannel analog to digital converter (ADC) module, a multichannel bridge connection module, a multichannel digital down-conversion application specific integrated circuit (ASIC) module, a multichannel field programmable gata array (FPGA) processing module, a multichannel digital signal processor (DSP) processing module, a multi-interface output module and a DSP general control module. A data output of the multichannel ADC module is connected with a data input of the multichannel bridge connection module, a data output of the multichannel bridge connection module is connected with a data input of the multichannel digital down-conversion ASIC module, and a data output of the multichannel digital down-conversion ASIC module is connected with a data input of the multichannel FPGA processing module. The multichannel FPGA processing module is connected with the multichannel DSP processing module by bothway multichannel data. The data output of the multichannel DSP processing module outputs the final result by the multi-interface output module. The universal type digital intermediate frequency receiver is good in generality, high in processing efficiency, low in cost, and beneficial to industrialization.

Description

Technical field [0001] The invention relates to a digital intermediate frequency receiver, especially a digital intermediate frequency receiver with multi-channel flexible combination and parallel processing structure and good versatility. The technical field of the invention belongs to the technical field of software radio. Background technique [0002] The traditional radio system is an analog radio system, generally a superheterodyne structure. [0003] Such as figure 1 As shown, a traditional analog radio receiving system with a superheterodyne structure includes a radio frequency front-end module 101, a down conversion module 102, a local oscillator module 103, an intermediate frequency bandpass filter module 104, a demodulation module 105 and a baseband processing module 106, and the radio frequency signal passes through After the above modules are processed sequentially, they are converted into final results and output to the user 107. All of the above modules use an...

AI Technical Summary

Problems solved by technology

[0018] The advantage of polyphase filter channelized receiver is that it has a large number of channels, a wide field of view, and can achieve full probability interception. It is suitable for full probability reception, but its structure is fixed, it is inconvenient to adjust parameters, and it lacks flexibility

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