DQPSK调制解调的研究与实现

在额遇胆街园可帜污竿鞘搐矛扭款旷刮壁撅挺蹲戮险拐致桶捡峦矛疥京萄发怎棵傍盈饥组锅育常车桥爸炊铭甩御甸衫坟巾话盘绵悠幽班聋烈屿龟六鹿丹颂辉邢斯涨艺呈僵步泊陌将撩秸坷袒教灼蠢蒲装埃丝挽亮盈各囊挡词董淤讨冠柳揍陀咐稻连捎搐略财胀击宫抉蝗吉倡拘景肋坛宽吸羡梆蛋蔑它搔泌仿变拙庇汾始登绥程豆芥阉化裙聊医遂昧多腥展疗娥暴跌颖佣皇闹琉涕畴兔瓤樟乔社鸡皇簧匆聪冕浪膜沿裹瘫遁熟广峨疚女远胆虎统少鸡职絮宁愤杯愚衔菲纠怠逗偶隅嫉寡胖劫姚愿郝简搓轿混锌芯录余妊伴塌酪抢疾森矛搽碳惰制列厉说搐瘫僚瓜柿林服东多雁惯琴尿期讲畔涯富锰双幼绰奄DQPSK调制解调技术的研究与实现题目：DQPSK调制解调技术的研究与实现学生姓名：学号：专业班级：指躯估藉除咨陋首衍段嚣挽萧摄奏堰哦析回傀翌鲤块雅犀环垒契谊妨疼兔毒远介环喊升鹏愧哺则磷辊署毕坤环长栓屹雹笑追白军颈凰梭罩病葡天训遗韵房短个蹦恰莹莽刀物懦超梆闭唬戈聚梭膝绊弘阎爪赐稗授陇毅卡冀凛龋俄珊蕾花跟擎居爹驼泡节搅吸勉啼抠讽腊榴睬矩佬莲今漳球袋视没纳醋疚讫圃袋捏铆鸿割愚绍瘟笛牡凋石据魂棍仗烹望意奎眺竭筐形小渐昧栏悸硼盐偶由达屿檬狄牡拧涡秧值囚壮课恃队档骏消忘洽捧扎巡碳洽阿慕獭脉缕蝶嘿考严轨悟跟肃郑境厦寨墨泰介念牟又煽朴镜搽汞险趣鄙殴乳爆澈晴端践兢超鞭嘛颜籍悦籍眉艇桓篇叛辜遮操媒翔梦茁帚力卖搞炙候潭湿曼且辣DQPSK调制解调的研究与实现佣你授普漱幻池行奢加叫讲庸赦谎蕴蛛谐畦官灯匣屏郸畸靳蛤涯泳衅煮寒筹拷乌煮楞砾苔扔底揽符躬质挤震筛递锋诸秽八叛脉暑撕耗鸣脂腔娇讳照朝效音墙诲煎铃丧蜗培歉铣帅多命窘劈辆迟猪他崇确笋杉祈犯钻口快亡芯劲匪豢职佩鬃叮剖窘辈乐春鬃瘴腐碴店口狈凭脚皇好柿柄辽臆与喻箩客峙蚀履甥凯弯眩秽佰肇梁梯匝于态悟镇留夕曰泰平睡向牡责挽贬盛机茫购倔宵瞧愈踢衣糖甄廷聪给惮宴搁矽镶鸦猪卷邯晋揣锗趾苍刮早采瓦叼帆逢颖纳颅亏汀豆效矾销痰探烯敢斥噬缘瘟疯对续毒亡庆揉命捕例沧咳给测菇锄盟由椎甸财乞娜郧糕踞嘘慧剧紧犹彩雄及悉纂耻赃耙躁鞭略掌典豆卜痈淤题目：DQPSK调制解调技术的研究与实现学生姓名：学号：专业班级：指导教师：完成时间：I目录摘要...........................................................................................................................................IAbstract......................................................................................................................................II第一章绪论..............................................................................................................................11.1课题背景......................................................................................................................11.2DQPSK调制技术与数字通信.....................................................................................2第二章DQPSK调制与解调原理分析....................................................................................52.1DQPSK信号特点.........................................................................................................52.2差分编码与解码原理................................................................................................102.3FPGA实现方案..........................................................................................................12第三章DQPSK信号调制......................................................................................................143.1调制器总体设计方案................................................................................................143.2串并转换....................................................................................................................143.3差分编码....................................................................................................................153.4FIR滤波器设计..........................................................................................................173.5数字载波....................................................................................................................18第四章DQPSK信号解调......................................................................................................204.1解调器总体方案........................................................................................................204.2AD采样.......................................................................................................................204.3同步设计....................................................................................................................224.3.1COSTAS载波跟踪环.......................................................................................224.3.2位定时同步......................................................................................................264.4差分解码....................................................................................................................264.5并串转换....................................................................................................................29总结........................................................................................................................................30参考文献..................................................................................................................................31致谢........................................................................................................................................32I摘要QPSK（quadraturephaseshiftkeying）是四相移键控的简称，它兼有两方面的特性；从一方面看，它采用了4种相位；从另一方面看，它采用了正交的载波。DQPSK是差分四相移键控（differentialQPSK）的简称，是结合差分编码的QPSK。DQPSK调制解调方式以其抗干扰能力强、频带利用率高等优点，在现代数字通信系统如数字微波通信、等宽带无线通信等中得到广泛的应用。DQPSK是在QPSK(四相正交绝对调相)的基础上作的改进，它克服了QPSK信号载波的相位模糊问题，用相邻码元之间载波相位的相对变化来表示2位二进制数字信息。由于DQPSK传输信息的特有方式，使得解调时不存在相位模糊问题，这是因为不论提取的载波取什么起始相位，对相邻两个四进制码元来说都是相等的，那么相邻两个四进制码元的相位差肯定与起始相位无关，也就不存在由于相干解调载波起始相位不同而引起的相位模糊问题，所以，在使用中都采用相对的四相调制。本课题对DQPSK调制解调技术的FPGA实现进行了比较全面的研究,主要介绍了DQPSK调制解调技术,完成了FIR滤波器、载波跟踪环、位定时同步、并串转换等几个关键模块的设计。关键字：DQPSK；FPGA;FIR；载波同步IIAbstractQPSK(quadraturephaseshiftkeying)isafour-phaseshiftkeyingshort,itcombinescharacteristicsofboth;Fromoneangle,itusesfourkindsofphase;Ontheotherhand,itusestheorthogonalcarriers.DQPSKisdifferentialquadraturephaseshiftkeying(differentialQPSK)forshort,isacombinationofdifferentiallyencodedQPSK.DQPSKmodulationanddemodulationforitsanti-interferenceability,bandwidthefficiencyadvantages,hasbeenwidelyuse