This paper introduces the theory and design method of digital intermediate frequency receiver,and based on high speed DSP and FPGA establish hardware process platform.

This article mainly studies the theory and design methods of the Digital Intermediate Frequency receiver in CDMA2000 system.

Application of digital down converter HSP50214B in IF digital receiver

In this paper,the application and design of the two kinds of filters in IF digital receiver based on the technology of software radio are discussed,including the mathematical principle,function analysis and settings.

Its main character,internal structures and operation theory are introduced,and an exam-ple of its application in wide-band IF digital receivers is given.

Based on the requirements to digital IF receiver on their gain tuning range, step width and accuracy, frequency range as well as response speed of AGC circuits, the paper analyses the drawbacks of three kinds of typical variable gain amplifiers for the AGC system, and designs a digital AGC system, using a new digital VGA IC —— the AD8369 produced by ADI Inc.

In digital IF receiver based on IF sampling technology,one important issue of system design is how to realize wide instantaneous dynamic range,when the available digits of AD converter is limited.

This subject has completed the research and development of a digital IF receiver based on PCI bus, associating with the proj.

Realization of IF digital receiver system based on FPGA;

In this paper,a design scheme of zero-intermediate frequency digital receiver is introduced,which is based in in_quadrature multiphase filtering.