基于FPGA的擴(kuò)頻通信測距測速系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)
本文選題:直接序列擴(kuò)頻通信 + 偽碼同步; 參考:《華中科技大學(xué)》2014年碩士論文
【摘要】:本文介紹了一種基于FPGA實(shí)現(xiàn)的擴(kuò)頻測距測速系統(tǒng),該系統(tǒng)用于空間衛(wèi)星距離速度的測量,同時(shí)實(shí)現(xiàn)衛(wèi)星與地面的擴(kuò)頻通信。 本文設(shè)計(jì)的測距測速系統(tǒng)包括測距測速和遙控遙測兩個(gè)通道。測距測速通道接收來自地面的兩路擴(kuò)頻測量幀,解算出上行偽距、偽多普勒,并將上行偽距、偽多普勒插入到下行測量幀進(jìn)行擴(kuò)頻調(diào)制、載波調(diào)制后發(fā)往地面。遙控遙測通道接收地面測控站發(fā)送的上行擴(kuò)頻遙控信號,完成解擴(kuò)、解調(diào),并將解擴(kuò)解調(diào)后的遙控信號送遙控單元,同時(shí)接收遙控單元送來的遙測信號進(jìn)行編碼擴(kuò)頻調(diào)制輸出。 經(jīng)過大量的理論分析和驗(yàn)證,本課題采用FPGA來實(shí)現(xiàn)擴(kuò)頻測距測速系統(tǒng)的基帶電路,根據(jù)系統(tǒng)的各項(xiàng)參數(shù)和指標(biāo)要求設(shè)計(jì)并實(shí)現(xiàn)發(fā)送信號的偽隨機(jī)碼調(diào)制、接收信號的偽碼捕獲與跟蹤、載波跟蹤、數(shù)據(jù)的解調(diào)以及與嵌入式處理器的接口設(shè)計(jì)。 本文首先對擴(kuò)頻通信的基本原理和直接序列擴(kuò)頻通信系統(tǒng)的基本結(jié)構(gòu)進(jìn)行了闡述,解釋了擴(kuò)頻通信用于測距測速的基本原理,然后根據(jù)系統(tǒng)的各項(xiàng)指標(biāo)要求給出了系統(tǒng)總體的設(shè)計(jì)方案,并對擴(kuò)頻測距測速系統(tǒng)進(jìn)行了功能劃分,,然后對系統(tǒng)的FPGA邏輯設(shè)計(jì)和實(shí)現(xiàn)原理進(jìn)行了詳細(xì)完整的闡述。 擴(kuò)頻測距測速接收機(jī)設(shè)計(jì)已經(jīng)順利完成,并進(jìn)行了最終的測試,接收機(jī)工作穩(wěn)定,各項(xiàng)指標(biāo)均達(dá)到設(shè)計(jì)要求。
[Abstract]:In this paper, a spread spectrum ranging and velocimetry system based on FPGA is introduced. The system is used to measure the distance velocity of space satellite, and the spread spectrum communication between satellite and ground is realized at the same time. The system includes two channels: ranging and telemetry. The range measurement channel receives two spread spectrum measurement frames from the ground, solves the uplink pseudo-range, pseudo Doppler, and inserts the uplink pseudo-range, pseudo Doppler into the downlink measurement frame for spread spectrum modulation, then the carrier modulation is sent to the ground. The remote control channel receives the uplink spread spectrum remote control signal from the ground measurement and control station, completes the despreading and demodulating, and sends the despreading and demodulating remote control signal to the remote control unit, while receiving the remote sensing signal sent by the remote control unit to code the spread spectrum modulation output. After a lot of theoretical analysis and verification, this paper uses FPGA to realize the baseband circuit of spread spectrum ranging and velocimetry system, and designs and realizes the pseudorandom code modulation of the transmitted signal according to the system parameters and specifications. PN code acquisition and tracking, carrier tracking, data demodulation and interface design with embedded processor. In this paper, the basic principle of spread spectrum communication and the basic structure of direct sequence spread spectrum communication system are described, and the basic principle of spread spectrum communication used in ranging and velocimetry is explained. Then according to the requirements of each index of the system, the overall design scheme of the system is given, and the function of the spread spectrum ranging and velocimetry system is divided. Then, the FPGA logic design and the realization principle of the system are described in detail. The design of spread spectrum ranging and velocimetry receiver has been completed successfully and the final test has been carried out. The receiver works stably and each index meets the design requirements.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN914.42
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 陳希;張銳;帥濤;;基于FFT的GPS快速并行捕獲算法[J];宇航學(xué)報(bào);2011年01期
2 張琳;初海彬;張乃通;;衛(wèi)星導(dǎo)航信號長碼快速直接捕獲算法研究[J];通信學(xué)報(bào);2007年03期
3 黃磊;張其善;寇艷紅;;基于差分碼和塊處理方法的GPS信號快速捕獲算法[J];通信學(xué)報(bào);2006年08期
4 陳鶴;邵定蓉;;高動(dòng)態(tài)擴(kuò)頻接收機(jī)中數(shù)字匹配濾波器的FPGA設(shè)計(jì)[J];電子設(shè)計(jì)應(yīng)用;2006年05期
5 楊奎武,張丙杰;DS/CDMA通信中匹配濾波器的FPGA設(shè)計(jì)[J];現(xiàn)代電子技術(shù);2005年01期
6 花俊,許斌,郝建華;高動(dòng)態(tài)環(huán)境中偽碼鎖相環(huán)設(shè)計(jì)[J];裝備指揮技術(shù)學(xué)院學(xué)報(bào);2004年06期
7 陳實(shí)如,張京娟,孫堯;直擴(kuò)系統(tǒng)偽碼序列串并組合捕獲方案[J];哈爾濱工程大學(xué)學(xué)報(bào);2003年01期
8 李艷,張中兆;擴(kuò)頻統(tǒng)一測控系統(tǒng)的PN碼捕獲[J];無線電工程;2003年01期
9 王家勇,陳寅健,梁旭文,楊根慶;擴(kuò)頻碼雙級快速捕獲系統(tǒng)設(shè)計(jì)及性能分析[J];應(yīng)用科學(xué)學(xué)報(bào);2002年03期
10 譚爽,張曉林,匡巍,張超;中頻數(shù)字化擴(kuò)頻接收機(jī)IC設(shè)計(jì)與實(shí)現(xiàn)[J];遙測遙控;2002年03期
相關(guān)碩士學(xué)位論文 前4條
1 陳力;星地測距系統(tǒng)星上硬件平臺的設(shè)計(jì)與實(shí)現(xiàn)[D];華中科技大學(xué);2012年
2 任江濤;北斗接收機(jī)基帶信號的捕獲算法研究[D];合肥工業(yè)大學(xué);2010年
3 李晨;超長偽隨機(jī)碼快速捕獲研究與FPGA實(shí)現(xiàn)[D];華中科技大學(xué);2009年
4 鄧洪軍;高動(dòng)態(tài)導(dǎo)航接收機(jī)P碼捕獲及載波跟蹤技術(shù)研究[D];電子科技大學(xué);2008年
本文編號:1853883
本文鏈接:http://sikaile.net/kejilunwen/wltx/1853883.html