搜题
网友您好，请在下方输入框内输入要搜索的题目：
搜题
题目内容 （请给出正确答案）
提问人：网友owener_10 发布时间：2022-01-07
[主观题]

Why an OFDM system is very suitable for wideband wireless communications.

简答题官方参考答案 （由简答题聘请的专业题库老师提供的解答）
  抱歉！暂无答案，正在努力更新中……
更多“Why an OFDM system is very suitable for wideband wireless communications.”相关的问题
第1题
Consider a LTE system with system bandwidth 20 MHz...

Consider a LTE system with system bandwidth 20 MHz, Assume that each timeslot consists of 7 OFDM symbols. Each OFDM symbol is obtained by using 2048-point IFFT operation, and only 1200 mid-subcarriers are occupied by signals. if 16QAM modulation iand 2 transmit antennas are used in the downlink, evaluate the peak bit rate in the downlink. If the interspacing of adjacent subcarriers is 15 kHz, evaluate the total bandwidth for signals corresponding to 2048 subcarriers and the occupied bandwidth by signals corresponding to 1200 subcarriers. Explain why the signals do not occupy the whole bandwidth. If the interspacing of adjacent subcarriers is 15 kHz, evaluate the OFDM symbol period. If the interspacing of adjacent subcarriers is 15 kHz, evaluate the sampling rate in the IDFT/ IFFT operation and judge whether or not it satisfies the Nyquist's rule for sampling.

点击查看答案
第2题
Why might a taxpayer elect to depreciate assets using the Alternative Depreciation Sys
tem (ADS)？()I. The taxpayer desires rapid write off of assets.II. The taxpayer may be close to being subject to the alternative minimum tax.III. The taxpayer is experiencing a low income time period.

A、Statements I and III are correct

B、Only statement I is correct

C、Statements II and III are correct

D、Statements I and II are correct

E、Statements I, II, and III are correct

点击查看答案
第3题
Speaker A: The open stack system is marvelous. I love to browse around and just see what b
ooks there are. Speaker B: ______

A．So do I. But I"ve found you can waste a lot of time that way.

B．I don"t know when they started to introduce this new system.

C．I wonder why they don"t add more books on economics to the stacks.

D．What do you think of the service of the librarians？

点击查看答案
第4题
In an OFDM system with 16QAM, the symbol rate of 16QAM is equal to that of OFDM symbol.
点击查看答案
第5题
听力原文：M: I cannot find the reference book the teacher asked us to read.W: Why do you lo

听力原文：M: I cannot find the reference book the teacher asked us to read.

W: Why do you look for it on the shelves？ Why don't you use the searching system in the computer downstairs？

Q: What does the woman suggest the mall do？

(15)

A．He should try a better and convenient way.

B．He should give up looking for the book.

C．He should ask the librarian for help.

D．He should try the shelves downstairs.

点击查看答案
第6题
For an OFDM system with 64QAM, CP is used to eliminate the ISI between adjacent 64QAM symbols
点击查看答案
第7题
if the subcarrier interspacing in an ofdm system is

If the subcarrier interspacing in an OFDM system isf , calculate the normal OFDM symbol duration T.

点击查看答案
第8题
In an OFDM system, if the minimum subcarrier spaci...

In an OFDM system, if the minimum subcarrier spacing isHz, and N-point IFFT is used to realize OFDM modulation, then a the OFDM symbol duration is 1/. b. the sampling duration in OFDM symbols is. c. the sampling rate in OFDM symbols issamples/second. d. the maximum bandwidth of signals isHz。

A、对

B、错

C、对

D、对

点击查看答案
第9题
听力原文：Everyone has heard of the Braille system of reading for the blind. But few people
know why it is called the "Braille" system or who Louis Braille was. In the year 1812,Louis Braille was a very small boy. He lived in a small town in France. Louis' father had a small shop in which he made things of leather. One day Louis was playing in his father's shop and picked up a small tool with a very sharp point, Louis fell, the point of the tool entered his eye. And later he became blind in both eyes. One day, he said to his father," Blind people are the loneliest people in the world. I can tell one bird from another by its sound. I can know the door of the house by feeling it with my hand. But there are so many things which I can not hear and can not feel. Only books can free the blind. But there are no books for us to read."

Why is the reading system for the blind called the Braille？

A．Because it was invented by the person called Braille.

B．Because it was first used by the person called Braille.

C．It is unknown.

点击查看答案
第10题
CP in an OFDM system can be used to a. eliminate ISI between OFDM symbols. b. matain the orthogonality among subcarriers c. eliminate MAI d. improve the cell covarage.

A.对

B.对

C.错

D.错

点击查看答案
考试指南 全部 >
江苏科技大学函授本科和成人高考有区别吗扬州成人高考本科如何获得书（上班族如何提升 湖南省2024年成人高考成绩查询入口,，2024年湖南成考本科报名时间 如何查询24上半年甘肃自学考试成绩？具体步骤揭秘 网上考大专应该怎么报名 需要哪些步骤 2024年南京中医药大学成人高考录取分数线是多少呢？南京师范大学专升本和自考专升 函授专升本有什么特点函授本科和成人高考有区别吗（成人高考的流程介绍） 参加成人高考的用途分析2024年江苏成人高考时间安排详解（函授本科有哪些类型） 24上半年内蒙古本科自考成绩查询入口解析 高等教育自学考试在哪里报名 湖南省成人高考学士学位申请所需资料,，湖南省2024年成人高考考试科目
重要提示： 请勿将账号共享给其他人使用，违者账号将被封禁！
查看《购买须知》>>>
重置密码
账号：
旧密码：
新密码：
确认密码：
确认修改
购买搜题卡查看答案
购买前请仔细阅读《购买须知》
请选择支付方式
微信支付
支付宝支付
点击支付即表示你同意并接受《服务协议》和《购买须知》
立即支付
搜题卡使用说明

1. 搜题次数扣减规则：

功能 扣减规则
基础费
（查看答案）		 加收费
（AI功能）
文字搜题、查看答案 1/每题 0/每次
语音搜题、查看答案 1/每题 2/每次
单题拍照识别、查看答案 1/每题 2/每次
整页拍照识别、查看答案 1/每题 5/每次

备注：网站、APP、小程序均支持文字搜题、查看答案；语音搜题、单题拍照识别、整页拍照识别仅APP、小程序支持。

2. 使用语音搜索、拍照搜索等AI功能需安装APP（或打开微信小程序）。

3. 搜题卡过期将作废，不支持退款，请在有效期内使用完毕。

找回账号密码
联系在线客服
请使用微信扫码支付(元)

订单号：

遇到问题请联系在线客服

请不要关闭本页面，支付完成后请点击【支付完成】按钮
遇到问题请联系在线客服
恭喜您，购买搜题卡成功 系统为您生成的账号密码如下：
重要提示：请勿将账号共享给其他人使用，违者账号将被封禁。
发送账号到微信 保存账号查看答案
怕账号密码记不住？建议关注微信公众号绑定微信，开通微信扫码登录功能
警告：系统检测到您的账号存在安全风险

为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！

- 微信扫码关注简答题 -
警告：系统检测到您的账号存在安全风险
抱歉，您的账号因涉嫌违反简答题购买须知被冻结。您可在“简答题”微信公众号中的“官网服务”-“账号解封申请”申请解封，或联系客服。
- 微信扫码关注简答题 -
请用微信扫码测试
欢迎分享答案

为鼓励登录用户提交答案，简答题每个月将会抽取一批参与作答的用户给予奖励，具体奖励活动请关注官方微信公众号：简答题

简答题官方微信公众号

尊敬的用户，您尚未绑定微信号
扫码关注微信公众号，开通微信扫码登录功能
您可能还需要：
重置密码 查看订单 联系客服
简答题
下载APP
关注公众号
TOP