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A Design and Implementation of Digital Intermediate Frequency Module in Software Radio System

Author: ChenZuo
Tutor: ZhuGang
School: Nanjing University of Aeronautics and Astronautics
Course: Communication and Information System
Keywords: Software Defined Radio IF Multirate Sampling Digital up / down conversion Coherent demodulation Carrier Synchronization
CLC: TN925
Type: Master's thesis
Year: 2005
Downloads: 556
Quote: 4
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Abstract


Traditional radio transceiver system hardware dependence is strong, signal adaptation ability is poor, the emergence of software radio technology innovation led to the transceiver. The basic idea is to sample rf on high speed DSP processing platform loading different software to realize different functions. Given the device level, has not the rf direct sampling, can only be used in intermediate frequency sampling and special chip to complete the intermediate frequency module design. Software radio transceiver system is discussed in this paper the digital intermediate frequency module realization method. Firstly in this paper, the theoretical basis of software radio, the multi-rate sampling, digital up/down frequency conversion technology, digital signal modulation/demodulation techniques, and when receiving the paper analyzes and discusses the synchronization problem. And then to establish a system implementation scheme, choosing the appropriate chip design system hardware circuit, and the digital up/down frequency conversion chip made initial configuration register. Then details the system of DSP, CPLD and other software program flow and design steps. Finally through to the A/D, digital up/down frequency conversion, coherent demodulation of DPSK signal and carrier synchronization algorithm simulation analysis, verify the parameter design of each module and the system feasibility.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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