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Study on Digital Channelized Receiver Based on FPGA

Author: SuJianPing
Tutor: ChenJian
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Digital channelized receiver Polyphase filter Digital quadrature downconversion FPGA
CLC: TN851
Type: Master's thesis
Year: 2011
Downloads: 156
Quote: 2
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Abstract


With the development of communication technology , modern communication reconnaissance system not only requires a wide input bandwidth, high sensitivity and resolution , wide dynamic range and a plurality of signals arrive simultaneously handling ability, but also must be adaptable to modern high- density signal environment , the receiving the wealth of information must be performed in real time or near real-time processing . Therefore , to carry out the broadband receiver study has important practical significance. This paper studies the digital channelized receiver efficient structures and the actual project requirements , the digital channelized receiver has been associated with FPGA technology . First, based on wideband digital receiver basic theory, in-depth study deduced based on polyphase DFT for digital channelized receiver efficient structure , and for the channelization occurred during the existence of blind spots , channel blur , cross- channel problem, a corresponding solution. In addition, the study of the digital channelized FPGA implementation of related technologies : technologies quadrature digital downconversion , filtering technology, in which the digital FIR filter with FPGA -depth research, analysis of different FPGA implementation of FIR filter structures in the positive pay down conversion module is selected based on multiply-accumulate clock selection algorithms FIR filter structure, which is working to reduce the rate multiplier data while reducing the amount of computation in digital channelized module polyphase filter , from the complex degree considerations, choose a direct -type FIR implementation structure . Finally, system solutions for the Matlab and FPGA simulation method is verified by simulation analysis of the correctness of achievement of the project requirements.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Receiver equipment, radio Radio > Receiver: the form of points
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