通信人家园
标题:
请高手帮忙做下试题,在线等!!!!!!
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时间:
2008-2-25 11:03
作者:
pcw_777
标题:
请高手帮忙做下试题,在线等!!!!!!
[attach]17828[/attach]<br/>
时间:
2008-2-25 11:15
作者:
家园守护神
帮顶。
时间:
2008-2-25 11:17
作者:
pcw_777
<p>
</p><p>高手帮忙做下啊</p>
时间:
2008-2-25 11:31
作者:
pcw_777
没人会做啊????
时间:
2008-2-25 13:02
作者:
星星1112
还是直接贴出来吧，这样大家还要去下载，做好还要去上传，估计没那么多时间
时间:
2008-2-25 13:12
作者:
totomm
不会
时间:
2008-2-25 13:44
作者:
c122
<span lang="EN-US" style="font-size: 10.5pt; font-family: "Times New Roman";">GSM</span><span style="font-size: 10.5pt; font-family: 宋体;">系统使用的多址方式为</span><span lang="EN-US" style="font-size: 10.5pt; font-family: "Times New Roman";">_ FDMA+TDMA,</span>
时间:
2008-2-25 13:46
作者:
c122
GSM的调制方式为<br/><span style="text-decoration: underline;">GMSK</span>，调制速率为<span style="text-decoration: underline;">270.833kbit/s</span>。
时间:
2008-2-25 13:54
作者:
c122
<span style="font-size: 10.5pt; font-family: 宋体;">话务量定义:在一特定时间内呼叫次数与每次呼叫平均占用时间的乘积!<br/><br/></span>
时间:
2008-2-25 13:55
作者:
c122
<p align="center" class="MsoNormal" style="margin: 7.8pt 0cm; text-align: center; line-height: 150%;"><b><span lang="EN-US" style="font-size: 12pt; line-height: 150%;">2008</span></b><b><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">年工程技术人员考核</span></b><b><span lang="EN-US" style="font-size: 12pt; line-height: 150%;">----</span></b><b><span style="font-size: 12pt; line-height: 150%; font-family: 宋体;">补考卷</span></b><b><span lang="EN-US" style="font-size: 12pt; line-height: 150%;"><op></op></span></b></p>
<p class="MsoNormal" style="margin: 7.8pt 0cm; line-height: 150%;"><span style="line-height: 150%; font-family: 宋体;">部门：</span><u><span lang="EN-US" style="line-height: 150%;"><span> </span></span></u><span lang="EN-US" style="line-height: 150%;"><span> </span></span><span style="line-height: 150%; font-family: 宋体;">姓名：</span><u><span lang="EN-US" style="line-height: 150%;"><span> </span></span></u><span lang="EN-US" style="line-height: 150%;"><span> </span></span><span style="line-height: 150%; font-family: 宋体;">成绩：</span><u><span lang="EN-US" style="line-height: 150%;"><span> </span><op></op></span></u></p>
<p class="MsoNormal" style="line-height: 150%;"><b><span style="font-family: 宋体;">一、第一部分。（</span><span lang="EN-US">60</span></b><b><span style="font-family: 宋体;">分）</span><span lang="EN-US"><op></op></span></b></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">1</span><span style="font-family: 宋体;">、</span><span lang="EN-US">GSM</span><span style="font-family: 宋体;">的调制方式为</span><u><span lang="EN-US"><span> </span>GMSK<span> </span></span></u><span style="font-family: 宋体;">。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; z-index: 1; left: 0px; margin-left: 12px; margin-top: 31px; width: 268px; height: 90px;"><img width="268" height="90" vshapes="_x0000_s1026 _x0000_s1027 _x0000_s1028 _x0000_s1029 _x0000_s1030 _x0000_s1031 _x0000_s1032 _x0000_s1033 _x0000_s1034 _x0000_s1035 _x0000_s1036 _x0000_s1037 _x0000_s1038 _x0000_s1039 _x0000_s1040 _x0000_s1041" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image001.gif" alt=""/></span><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US">2</span><span style="font-family: 宋体;">、请计算如下分配关系：</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span style="font-family: 宋体;">信号由二功分端口入，二功分隔离度</span><span lang="EN-US">20dB</span><span style="font-family: 宋体;">，耦合器隔离度为</span><span lang="EN-US">25dB</span><span style="font-family: 宋体;">（功分器、耦合器插入损耗不计）。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">3</span><span style="font-family: 宋体;">、工程施工放置馈线时，每端预留馈线长度为</span><u><span lang="EN-US"><span> </span></span></u><span style="font-family: 宋体;">。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">4</span><span style="font-family: 宋体;">、在实际工程中，需要测量隔离度，请问用何种办法进行隔离度的测试，用图表示。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">5</span><span style="font-family: 宋体;">、若在室外设立一直放站，对接地电阻的要求是什么？</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">6</span><span style="font-family: 宋体;">、选带直放站与选频直放站有何区别？</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">7</span><span style="font-family: 宋体;">、若</span><span lang="EN-US">CDMA</span><span style="font-family: 宋体;">手机在通话时，其接收场强显示为</span><span lang="EN-US">-55dBm</span><span style="font-family: 宋体;">，请问此时</span><span lang="EN-US">CDMA</span><span style="font-family: 宋体;">手机发射功率大约为？</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; z-index: 3; left: 0px; margin-left: 288px; margin-top: 31px; width: 292px; height: 67px;">
<table cellspacing="0" cellpadding="0">
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<td width="292" height="67" style="vertical-align: top;"><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; left: 0pt; z-index: 3;">
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<div class="shape" vshape="_x0000_s1049" style="padding: 3.6pt 7.2pt;">
<p class="MsoNormal"><span style="font-family: 宋体;">若：</span><span lang="EN-US">G</span><sub><span style="font-family: 宋体;">下</span></sub><span lang="EN-US">-G</span><sub><span style="font-family: 宋体;">上</span></sub><span lang="EN-US">=10dB</span><span style="font-family: 宋体;">，此时能否工作，与</span><span lang="EN-US">G</span><sub><span style="font-family: 宋体;">下</span></sub><span lang="EN-US">=G</span><sub><span style="font-family: 宋体;">上</span></sub><span lang="EN-US">+3</span><span style="font-family: 宋体;">相比较手机发射功率相对增加多大？</span></p>
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</span><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; z-index: 2; left: 0px; margin-left: 47px; margin-top: 35px; width: 210px; height: 81px;"><img width="210" height="81" vshapes="_x0000_s1042 _x0000_s1043 _x0000_s1044 _x0000_s1045 _x0000_s1046 _x0000_s1047 _x0000_s1048" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image002.gif" alt=""/></span><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US">8</span><span style="font-family: 宋体;">、如图：</span><span lang="EN-US"><span> </span></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="text-indent: 10.5pt; line-height: 150%;"><span lang="EN-US">1</span><span style="font-family: 宋体;">）若是一个无线直放站接入，距</span><span lang="EN-US">BTS</span><sub><span lang="EN-US" style="line-height: 150%;">1</span></sub><span lang="EN-US">4KM</span><span style="font-family: 宋体;">，覆盖区</span><span lang="EN-US">MS</span><span style="font-family: 宋体;">距</span><span lang="EN-US">BTS</span><sub><span lang="EN-US" style="line-height: 150%;">2</span></sub><span lang="EN-US">6KM</span><span style="font-family: 宋体;">，基站覆盖距离</span><span lang="EN-US">3KM</span><span style="font-family: 宋体;">，计算以上各参数</span><span lang="EN-US">(D2=5us)?</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">2</span><span style="font-family: 宋体;">）若使用光纤直放站接入，光纤路由长为</span><span lang="EN-US">5KM</span><span style="font-family: 宋体;">，计算以上各参数。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">9</span><span style="font-family: 宋体;">、一般室内勘测时，话务量如何计算？（假设忙时话务量</span><span lang="EN-US">0.0125Erl</span><span style="font-family: 宋体;">，若用户数为</span><span lang="EN-US">1000</span><span style="font-family: 宋体;">人）</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">10</span><span style="font-family: 宋体;">、在进行电梯覆盖时，在</span><span lang="EN-US">3G</span><span style="font-family: 宋体;">信号覆盖的条件下，一般如何覆盖？天线输入电平在什么范围？</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><b><span style="font-family: 宋体;">二、第二部分。（</span><span lang="EN-US">40</span></b><b><span style="font-family: 宋体;">分）</span><span lang="EN-US"><op></op></span></b></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">1</span><span style="font-family: 宋体;">、画出光纤直放站的设备原理图，并说明各部分作用。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">2</span><span style="font-family: 宋体;">、如下图所示：为移频直放站传输路由。</span></p>
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<td><img width="433" height="67" vshapes="_x0000_s1050 _x0000_s1051 _x0000_s1052 _x0000_s1053 _x0000_s1054 _x0000_s1055 _x0000_s1056 _x0000_s1057 _x0000_s1058 _x0000_s1059 _x0000_s1060 _x0000_s1061 _x0000_s1062 _x0000_s1063 _x0000_s1064 _x0000_s1065 _x0000_s1066 _x0000_s1067 _x0000_s1068" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image003.gif" alt=""/></td>
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</span><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><op> </op></span></p>
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<p class="MsoNormal" style="margin-left: 34.5pt; text-indent: -18pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><span>1）<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--Element not supported - Type: 8 Name: #comment--><span dir="ltr"><span style="font-family: 宋体;">若移频至</span><st1chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1.5" unitname="g"><span lang="EN-US">1.5G</span></st1chmetcnv></span><span style="font-family: 宋体;">频段计算</span><st1chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="8" unitname="km"><span lang="EN-US">8KM</span></st1chmetcnv><span style="font-family: 宋体;">微波传输路径上的路径损耗；</span></p>
<p class="MsoNormal" style="margin-left: 34.5pt; text-indent: -18pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><span>2）<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--Element not supported - Type: 8 Name: #comment--><span dir="ltr"><span style="font-family: 宋体;">若天线增益为</span><span lang="EN-US">15dBi</span></span><span style="font-family: 宋体;">，请计算微波链路下行功率</span><span lang="EN-US">/</span><span style="font-family: 宋体;">载波。</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">3</span><span style="font-family: 宋体;">、小区分布时天线如何选择？天线输入口功率如何选择？</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">4</span><span style="font-family: 宋体;">、在进行隧道覆盖设计时，如何考虑其切换区设计（简要描述）</span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><b><span style="font-family: 宋体;">三、第三部分。（</span><span lang="EN-US">50</span></b><b><span style="font-family: 宋体;">分）</span><span lang="EN-US"><op></op></span></b></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US">1</span><span style="font-family: 宋体;">、若一室内分布系统如下图：带四台干放，增益</span><span lang="EN-US">40DB</span><span style="font-family: 宋体;">。</span></p>
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<td><img width="497" height="99" vshapes="_x0000_s1069 _x0000_s1070 _x0000_s1071 _x0000_s1072 _x0000_s1073 _x0000_s1074 _x0000_s1075 _x0000_s1076 _x0000_s1077 _x0000_s1078 _x0000_s1079 _x0000_s1080 _x0000_s1081 _x0000_s1082 _x0000_s1083 _x0000_s1084 _x0000_s1085 _x0000_s1086" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image004.gif" alt=""/></td>
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</span><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><op> </op></span></p>
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<p class="MsoNormal" style="margin-left: 29.25pt; text-indent: -18pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><span>1）<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--Element not supported - Type: 8 Name: #comment--><span dir="ltr"><span style="font-family: 宋体;">请从设计的角度描述各干放的输入电平值范围；</span></span></p>
<p class="MsoNormal" style="margin-left: 29.25pt; text-indent: -18pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><span>2）<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--Element not supported - Type: 8 Name: #comment--><span dir="ltr"><span style="font-family: 宋体;">各干放的最大输出电平</span><span lang="EN-US"> /</span></span><span style="font-family: 宋体;">单载频。</span></p>
<p class="MsoNormal" style="text-indent: 10.5pt; line-height: 150%;"><span lang="EN-US">3</span><span style="font-family: 宋体;">）若要求对</span><span lang="EN-US">BTS</span><span style="font-family: 宋体;">的干扰增量小于</span><span lang="EN-US">1dB</span><span style="font-family: 宋体;">，请计算各干放上行输出底噪。</span></p>
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<p class="MsoNormal" style="line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; z-index: 6; left: 0px; margin-left: 47px; margin-top: 35px; width: 210px; height: 81px;"><img width="210" height="81" vshapes="_x0000_s1087 _x0000_s1088 _x0000_s1089 _x0000_s1090 _x0000_s1091 _x0000_s1092 _x0000_s1093" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image002.gif" alt=""/></span><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US">2</span><span style="font-family: 宋体;">、计算</span><span lang="EN-US">CDMA</span><span style="font-family: 宋体;">带宽在</span><span lang="EN-US">1.25MHZ</span><span style="font-family: 宋体;">，热噪声电平。如下图：</span><span lang="EN-US">Dn</span><span style="font-family: 宋体;">为各设备之间的时延。</span><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; z-index: 7; left: 0px; margin-left: 32px; margin-top: 20px; width: 556px; height: 138px;"><img width="556" height="138" vshapes="_x0000_s1094 _x0000_s1095 _x0000_s1096 _x0000_s1097 _x0000_s1098 _x0000_s1099 _x0000_s1100 _x0000_s1101 _x0000_s1102 _x0000_s1103 _x0000_s1104 _x0000_s1105 _x0000_s1106 _x0000_s1107 _x0000_s1108 _x0000_s1109 _x0000_s1110 _x0000_s1111 _x0000_s1112 _x0000_s1113 _x0000_s1114 _x0000_s1115 _x0000_s1116 _x0000_s1117 _x0000_s1118 _x0000_s1119" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image005.gif" alt=""/></span><!--Element not supported - Type: 8 Name: #comment--></p>
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<p class="MsoNormal" style="line-height: 150%;"><span lang="EN-US"><span> </span><span> </span>D5</span></p>
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<p class="MsoNormal" style="line-height: 150%;"><span style="font-family: 宋体;">其中：</span><span lang="EN-US">D=D1+D2+D3</span></p>
<p class="MsoNormal" style="margin-left: 18pt; text-indent: -18pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><span>1）<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--Element not supported - Type: 8 Name: #comment--><span dir="ltr"><span style="font-family: 宋体;">基站的接入信道搜索窗≥</span><span lang="EN-US">2*D</span></span><span style="font-family: 宋体;">；</span></p>
<p class="MsoNormal" style="margin-left: 18pt; text-indent: -18pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><span lang="EN-US"><span>2）<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--Element not supported - Type: 8 Name: #comment--><span dir="ltr"><span style="font-family: 宋体;">基站的激活导频组与业务多径搜索窗≥</span><span lang="EN-US">2</span></span><span style="font-family: 宋体;">（</span><span lang="EN-US">D-D4</span><span style="font-family: 宋体;">）；</span></p>
<p class="MsoNormal" style="text-indent: 5.25pt; line-height: 150%;"><span style="font-family: 宋体;">邻近导频组搜索窗≥</span><span lang="EN-US">2</span><span style="font-family: 宋体;">（</span><span lang="EN-US">D-D5</span><span style="font-family: 宋体;">）</span></p>
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<p class="MsoNormal" style="text-indent: 5.25pt; line-height: 150%;"><span lang="EN-US">3</span><span style="font-family: 宋体;">、如下图</span></p>
<p class="MsoNormal" style="text-indent: 5.25pt; line-height: 150%;"><span style="font-family: 宋体;">欲在</span><span lang="EN-US">A</span><span style="font-family: 宋体;">点设立一直放站对村庄进行覆盖，若阴影衰落为</span><span lang="EN-US">8DB</span><span style="font-family: 宋体;">，建筑物损耗均值为</span><span lang="EN-US">10DB</span><span style="font-family: 宋体;">，求直放站单载频功率输出。</span></p>
<p class="MsoNormal" style="text-indent: 5.25pt; line-height: 150%;"><!--Element not supported - Type: 8 Name: #comment--><!--Element not supported - Type: 8 Name: #comment--><span style="position: absolute; z-index: 8; left: 0px; margin-left: 18px; margin-top: 93px; width: 519px; height: 241px;"><img width="519" height="241" vshapes="_x0000_s1120 _x0000_s1121 _x0000_s1122 _x0000_s1123 _x0000_s1124 _x0000_s1125 _x0000_s1126 _x0000_s1127 _x0000_s1128 _x0000_s1129 _x0000_s1130 _x0000_s1131 _x0000_s1132 _x0000_s1133 _x0000_s1134 _x0000_s1135 _x0000_s1136 _x0000_s1137 _x0000_s1138 _x0000_s1139 _x0000_s1140 _x0000_s1141 _x0000_s1142 _x0000_s1143 _x0000_s1144 _x0000_s1145 _x0000_s1146" src="file:///C:/DOCUME~1/Owner/LOCALS~1/Temp/msohtml1/01/clip_image006.gif" alt=""/></span><!--Element not supported - Type: 8 Name: #comment--><span style="font-family: 宋体;">若施主基站</span><span lang="EN-US">3</span><span style="font-family: 宋体;">载频，求直放站总功率。</span></p>
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时间:
2008-2-25 14:00
作者:
hzp2000itb
我好多不会啊，赶紧多看书，有危机感。
时间:
2008-2-25 15:05
作者:
igraham
<font><font class="font_body" id="zoom_3">高手帮忙做下</font></font>
时间:
2008-2-25 15:13
作者:
风来疏竹
这是干啥呀
时间:
2008-2-25 15:16
作者:
kulou
帮顶一下。。
时间:
2008-2-25 16:35
作者:
pcw_777
<p>
</p><p>公司的补考题，郁闷，大家帮忙下啊</p><p></p>
通信人家园 (https://www.txrjy.com/)
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</p><p>高手帮忙做下啊</p> 
</p><p>公司的补考题，郁闷，大家帮忙下啊</p><p></p>