不射精长痘痘的原因因??qam

QAM16 16QAM的 信号 星座映射图 用于OFDM的发射端 matlab 238万源代码下载-
&文件名称: QAM16
& & & & &&]
&&所属分类:
&&开发工具: matlab
&&文件大小: 19 KB
&&上传时间:
&&下载次数: 21
&&提 供 者:
&详细说明:16QAM的 信号 星座映射图 用于OFDM的发射端-16QAM signal constellation map for the OFDM-transmitter
文件列表(点击判断是否您需要的文件,如果是垃圾请在下面评价投诉):
&&QAM16\QAM.fig&&.....\QAM16.asv&&.....\QAM16.fig&&.....\QAM16.m&&.....\QAM16_AWGN.asv&&.....\QAM16_AWGN.m&&.....\QAM16_ray.m&&QAM16
&近期下载过的用户:
&相关搜索:
&输入关键字,在本站238万海量源码库中尽情搜索:
&[] - 六十四QAM调制解调器,实现星座映射解映射
&[] - 16QAM系统的调制,解调的仿真。作出星座图及调制,解调信号的波形,输出信号的功率谱,眼图及误码率曲线。
&[] - 16QAM系统的调制,解调的仿真。作出星座图及调制,解调信号的波形,输出信号的功率谱,眼图及误码率曲线。
&[] - 16Qam在瑞利衰落下的MATLAB仿真,包括误码率计算以及理论分析
&[] - 利用SIMULINK 来实现16QAM的仿真,并分析QAM的系统性能。
&[] - OFDM仿真程序,采用4QAM星座映射方式
&[] - 六十四QAM调制解调器,实现星座映射解映射
&[] - 16QAM调制与解调的Verilog语言的功能实现
&[] - 16QAM信号最佳接收机,包括信号生成(+成型滤波)、上载波、过信道、下变频、匹配滤波、定时同步等过程
&[] - QAM调制
调制qammod(a,16); 解调用qamdemod 画星座图modmap( qam ,4)4423人阅读
信号与系统(3)
When QAM (Quadrature Amplitude Modulation) is used, typically one may find a scaling factor associated with the constellation mapping operation. It may be reasonably obvious that this&scaling factor is for normalizing the average energy to one.
This post attempts to compute the average energy of the 16-QAM, 64-QAM and M-QAM constellation (where&&is a power of 2), thanks to the nice example 5.16 in&.
Consider a typical&16-QAM modulation scheme&where the alphabets
&are used.
Figure: 16QAM constellation mapping
Observations:
1. The number/type of the used constellation points in all the four quadrants are similar. Hence average energy computed over one quadrant is same as the energy over all the quadrants. The mean power can be computed over 16/4 = 4 constellation points.
2. The same alphabet set is used for real and imaginary axis. Hence energy of real and imaginary components are the same.
3. In each quadrant, the elements of each alphabet is used&&times by real and imaginary part respectively.
Considering so the average energy of 16-QAM is,
Hence the constellation points of 16-QAM are normalized with the factor&&to ensure that the average energy over all symbols is one.
Consider a&64-QAM modulation scheme&with the alphabets
Figure: 64QAM constellation mapping
Observations for 64-QAM:
1. Each quadrant has 16 constellation points
2. The energy of real and imaginary components are the same.
3. In each quadrant, the elements of each alphabet is used&&times by real and imaginary part respectively.
Hence the constellation points of 64-QAM are normalized with the factor&&to ensure that the average energy over all symbols is one.
Extending this to a general&M-QAM constellation mapping, where&&is a power of 2. The elements of the alphabet are
1. Each quadrant has&&constellation points
2. The energy of real and imaginary components are the same.
3. In each quadrant, the elements of each alphabet is used&&times by real and imaginary part respectively.
% Simple Matlab example
% QAM scaling factorclearclcalpha_16qam = [-3 -1 1 3];N = 10^5;const_16qam = randsrc(1,N,alpha_16qam) + j*randsrc(1,N,alpha_16qam); % generating 16-QAM constellation pointsenergy_16qam = const_16qam*const_16qam&/N
alpha_64qam = [-7 -5 -3 -1 1 3 5 7];const_64qam = randsrc(1,N,alpha_64qam) + j*randsrc(1,N,alpha_64qam); % generating 16-QAM constellation pointsenergy_64qam = const_64qam*const_64qam&/N
Can observe that energy_16qam and energy_64qam takes values close to 10 and 42 respectively.
Hope this helps.
Please&to newsletter and download the FREE e-Book on probability of error in AWGN. Thanks for visiting! Happy learning.
参考知识库
* 以上用户言论只代表其个人观点,不代表CSDN网站的观点或立场
访问:111910次
积分:1409
积分:1409
排名:千里之外
原创:23篇
评论:16条
(1)(1)(2)(4)(6)(15)肾结石,今天发现射精射不出来
肾结石,今天发现射精射不出来
基本信息:男&&20岁
病情描述及疑问:肾结石,今天发现射精射不出来其他情况:做过b超 挂过水 打过止痛针
您输入的回答少于20个中文字,请补充输入。
擅长:现任 武汉现代泌尿外科医院 首席专家 1965年,毕业于第四军医大学医疗系6年制本科,历任全军肾脏病中心主任,重庆肾脏病中心主任,全军优生优育中心副主任,第三军医大学肾脏病中心主任,第三军医大学泌尿外科学博士生导师,第三军医大学新桥医院泌尿外科主任、教授、主任医师。 对于本专业的危重疑难病例(如肾上腺肾肿瘤、肾鹿角型结石、输尿管肿瘤、膀胱癌、前列腺增生)的诊断、治疗和手术及其并发症处理,积累了丰富的经验。
网友满意:
回答速度:
武汉现代泌尿外科医院&&&男科
您好,男子在性生活高潮射精时的一瞬间,自觉有良好的射精感觉,也有极为明显的性交快感,就是不见精液从尿道口喷射出。这种现象俗称“干性射精”,医学上称为逆行射精。一般来讲常在阴部外伤和尿道炎症后,或手术后由于损伤了膀胱颈正常结构和解剖位置及神经末梢造成的,逆行射精可引起男性不育。所以一定要及早治疗。建议您及时到我院的性功能科就诊,查明病因,针对性治疗,以达到彻底治愈。建议您及时到医院就诊,祝您早日康复!
副主任医师
擅长:上海新科医院结石科:主治胆道外科、胆囊结石、肾结石、输尿管结石、肝内胆管结石、肝结石、胆囊炎、胆囊息肉、膀胱结石、尿道结石、胆道外科、胆管结石、擅长微创内镜保胆取石术等。
网友满意:
回答速度:
上海新科医院&&&
e肾脏内结石数目达到两颗或两颗以上被称为多发性肾结石。多发性肾结石的数量、大小、形状、所在部分和有无感染等并发症都会影响肾结石发作时的症状。多发性肾结石的症状主要包括肾绞痛,血尿、脓尿,急性梗阻性少尿、无尿和慢性肾功能衷竭。相对于只有一颗结石的结石病,多发性肾结石的症状表现得更为明显。多发性肾结石的症状表现:⑴肾绞痛:出现肾绞痛常表现上尿路有结石,多在夜间或清晨突然发作。结石阻塞尿路或处于下移状态时,肾绞痛加剧。患者痛苦异常,疼痛可向同侧腹股沟和睾丸或大阴唇放射;当结石在输尿管某一段且局部发生炎症时,绞痛以这一局部为著;结石移近膀胱时,肾绞痛可再次发生,并出现尿频、尿急及尿痛等症状。肾脏和胃肠的神经支配同属腹腔神经丛,故肾绞痛常可伴恶心、呕吐及肠麻痹症状,容易与急性胃肠炎、急性阑尾炎、结肠炎或输卵管炎相混淆。
有关的更多问题,
有关的健康经验
有关的更多经验,
副主任医师
广州医学院第三附属医院&&&妇产科
南方医科大学中西医结合医院&&&生殖健康科
副主任医师
广东省人民医院&&&妇产科
为保障患者权益,我们仅接受有资质的医学专业人士的回答,请您先认证为医生射电大作业_百度文库
两大类热门资源免费畅读
续费一年阅读会员,立省24元!
射电大作业
上传于||暂无简介
阅读已结束,如果下载本文需要使用0下载券
想免费下载更多文档?
定制HR最喜欢的简历
下载文档到电脑,查找使用更方便
还剩12页未读,继续阅读
定制HR最喜欢的简历
你可能喜欢温馨提示!由于新浪微博认证机制调整,您的新浪微博帐号绑定已过期,请重新绑定!&&|&&
追求美,爱,自由
LOFTER精选
网易考拉推荐
用微信&&“扫一扫”
将文章分享到朋友圈。
用易信&&“扫一扫”
将文章分享到朋友圈。
阅读(3782)|
用微信&&“扫一扫”
将文章分享到朋友圈。
用易信&&“扫一扫”
将文章分享到朋友圈。
历史上的今天
loftPermalink:'',
id:'fks_',
blogTitle:'QAM映射中功率归一化因子的理解',
blogAbstract:'
When QAM (Quadrature Amplitude Modulation) is used, typically one may find a scaling factor associated with the constellation mapping operation. It may be reasonably obvious that this&scaling factor is for normalizing the average energy to one.
This post attempts to compute the average energy of the 16-QAM, 64-QAM and M-QAM constellation (where&',
blogTag:'',
blogUrl:'blog/static/',
isPublished:1,
istop:false,
modifyTime:0,
publishTime:5,
permalink:'blog/static/',
commentCount:0,
mainCommentCount:0,
recommendCount:0,
bsrk:-100,
publisherId:0,
recomBlogHome:false,
currentRecomBlog:false,
attachmentsFileIds:[],
groupInfo:{},
friendstatus:'none',
followstatus:'unFollow',
pubSucc:'',
visitorProvince:'',
visitorCity:'',
visitorNewUser:false,
postAddInfo:{},
mset:'000',
remindgoodnightblog:false,
isBlackVisitor:false,
isShowYodaoAd:false,
hostIntro:'追求美,爱,自由',
hmcon:'1',
selfRecomBlogCount:'0',
lofter_single:''
{list a as x}
{if x.moveFrom=='wap'}
{elseif x.moveFrom=='iphone'}
{elseif x.moveFrom=='android'}
{elseif x.moveFrom=='mobile'}
${a.selfIntro|escape}{if great260}${suplement}{/if}
{list a as x}
推荐过这篇日志的人:
{list a as x}
{if !!b&&b.length>0}
他们还推荐了:
{list b as y}
转载记录:
{list d as x}
{list a as x}
{list a as x}
{list a as x}
{list a as x}
{if x_index>4}{break}{/if}
${fn2(x.publishTime,'yyyy-MM-dd HH:mm:ss')}
{list a as x}
{if !!(blogDetail.preBlogPermalink)}
{if !!(blogDetail.nextBlogPermalink)}
{list a as x}
{if defined('newslist')&&newslist.length>0}
{list newslist as x}
{if x_index>7}{break}{/if}
{list a as x}
{var first_option =}
{list x.voteDetailList as voteToOption}
{if voteToOption==1}
{if first_option==false},{/if}&&“${b[voteToOption_index]}”&&
{if (x.role!="-1") },“我是${c[x.role]}”&&{/if}
&&&&&&&&${fn1(x.voteTime)}
{if x.userName==''}{/if}
网易公司版权所有&&
{list x.l as y}
{if defined('wl')}
{list wl as x}{/list}

我要回帖

更多关于 长痘痘的原因 的文章

 

随机推荐