本文選題：FPGA + 正交頻分復(fù)用技術(shù)��； 參考：《浙江工業(yè)大學(xué)》2014年碩士論文

【摘要】：隨著海洋開發(fā)和利用的迅速發(fā)展,人們越來越重視水下語音通信系統(tǒng)的研究與開發(fā),如何在海洋中實現(xiàn)高速率、高可靠性的信息傳輸成為水聲通信中的研究重點。正交頻分復(fù)用技術(shù)(Orthogonal Frequency Division Multiplexing, OFDM)是數(shù)字通信中的一種多載波并行傳輸技術(shù),它具有較高的頻帶利用率,對多途干擾具有很強的抵抗能力。因此,OFDM技術(shù)被引入到水聲通信領(lǐng)域。由于FPGA具有并行處理方式,適用于OFDM算法的實現(xiàn),因此基于FPGA的OFDM水聲通信系統(tǒng)的設(shè)計具有重要的應(yīng)用價值。本文介紹了OFDM技術(shù)的基本工作原理和關(guān)鍵技術(shù),并簡要的介紹了FPGA設(shè)計的基本結(jié)構(gòu)和開發(fā)流程。針對FPGA適合并行處理的特點,設(shè)計了一種基于FPGA的OFDM水聲通信系統(tǒng),完成的主要工作和取得的成果如下：(1)本文首先對水聲信道的基本傳輸特性進行了初步分析,其次對OFDM技術(shù)的基本原理和關(guān)鍵技術(shù)進行了簡單介紹。最后根據(jù)總體需求提出了OFDM水聲通信系統(tǒng)的整體架構(gòu)。(2)設(shè)計了在FPGA上實現(xiàn)OFDM系統(tǒng)的具體方案。系統(tǒng)分為發(fā)射機和接收機兩部分：發(fā)射機完成數(shù)據(jù)的調(diào)制,把上位機送來的比特流調(diào)制成OFDM符號,并送到射頻前端發(fā)送。接收機把接收到的OFDM符號解調(diào)成為比特流。完成了FPGA內(nèi)部所有模塊的設(shè)計：發(fā)射機主要分為數(shù)據(jù)預(yù)處理模塊、數(shù)據(jù)映射模塊、導(dǎo)頻插入模塊、IFFT和循環(huán)前綴模塊以及數(shù)字上變頻模塊等。接收機主要分為數(shù)字下變頻模塊、幀同步模塊、時反模塊和多普勒補償模塊等。(3)采用Verilog HDL硬件描述語言編寫程序,在Xilinx的FPGA上完成算法的邏輯綜合和硬件測試。
[Abstract]:With the rapid development of ocean development and utilization, people pay more and more attention to the research and development of underwater voice communication system. How to achieve high speed and high reliability information transmission in the ocean has become the research focus in underwater acoustic communication. Orthogonal Frequency Division Multiplexing (OFDM) is a kind of multicarrier parallel transmission technology in digital communication. It has high bandwidth efficiency and strong resistance to multi-path interference. Therefore, OFDM technology is introduced into the field of underwater acoustic communication. Because FPGA has parallel processing mode, it is suitable for the realization of OFDM algorithm, so the design of OFDM underwater acoustic communication system based on FPGA has important application value. This paper introduces the basic principle and key technology of OFDM technology, and briefly introduces the basic structure and development flow of FPGA design. According to the characteristic that FPGA is suitable for parallel processing, a kind of OFDM underwater acoustic communication system based on FPGA is designed. The main work and achievements are as follows: (1) the basic transmission characteristics of underwater acoustic channel are analyzed preliminarily in this paper. Secondly, the basic principle and key technologies of OFDM are briefly introduced. Finally, the overall architecture of OFDM underwater acoustic communication system is proposed according to the overall requirements. (2) the implementation of OFDM system on FPGA is designed. The system is divided into transmitter and receiver: the transmitter modulates the data, modulates the bit stream sent by the host computer into OFDM symbol, and sends it to the RF front-end. The receiver demodulates the received OFDM symbols into a bit stream. The transmitter is divided into data preprocessing module, data mapping module, pilot insertion module Ifft and cyclic prefix module, digital up-conversion module and so on. The receiver is mainly divided into digital downconversion module, frame synchronization module, time-inverse module and Doppler compensation module. (3) using Verilog HDL hardware description language, the algorithm logic synthesis and hardware test are completed on Xilinx FPGA.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.3

【參考文獻】

相關(guān)期刊論文 前7條

1 蔣康;趙利;;基于FPGA的單載波頻域均衡器的設(shè)計[J];科技信息;2013年09期

2 丁承;羅炬鋒;汪磊;王營冠;付耀先;;一種應(yīng)用于OFDM系統(tǒng)中的符號精確定時算法的FPGA實現(xiàn)[J];現(xiàn)代電子技術(shù);2012年13期

3 徐健;;一種時域信道估計的FPGA實現(xiàn)方法[J];信息通信;2012年01期

4 殷敬偉;張曉;趙安邦;生雪莉;;時間反轉(zhuǎn)鏡在水聲通信網(wǎng)上行通信中的應(yīng)用[J];哈爾濱工程大學(xué)學(xué)報;2011年01期

5 鄧紅超;鞏玉振;蔡惠智;;基于MIMO-OFDM的高速水聲通信技術(shù)研究[J];通信技術(shù);2009年11期

6 何成兵;黃建國;閻振華;蘇剭;;M元擴頻OFDM水聲通信新方法[J];西北工業(yè)大學(xué)學(xué)報;2007年02期

7 朱彤,桑恩方;基于正交頻分復(fù)用的高速水聲通信技術(shù)[J];哈爾濱工程大學(xué)學(xué)報;2005年01期

相關(guān)碩士學(xué)位論文 前3條

1 孫崇強;基于OFDM的水聲通信關(guān)鍵技術(shù)研究[D];鄭州大學(xué);2013年

2 孔繁庭;循環(huán)前綴在OFDM系統(tǒng)中的作用及應(yīng)用研究[D];蘭州大學(xué);2008年

3 方敏;分組Turbo碼的研究[D];四川大學(xué);2003年

，

本文編號：2083494