新兵上阵
- 注册时间
- 2008-4-8
- 金币
- 14 个
- 威望
- 0 个
- 荣誉
- 0 个
尚未签到
|
发表于 2008-4-8 17:22
<p>大家好,现在给大家介绍个新的无线定位技术-UWB精确定位技术。目前在国内是初步阶段。<br/>下面先给大家介绍下UWB技术的特点和应用领域:<br/>UWB技术的特点:<br/><br/></p><img src="http://p15.freep.cn/p.aspx?u=v20_p15_p_0804081653376551_0.gif" border="0" alt=""/><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">UWB</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;">(</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">ultra wideband</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;">)</span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">是超宽带无线技术的缩写。</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">UWB</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">技术是一种使用</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">1GHz</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">以上带宽的短距离无线通信技术。其通信速度可以达到几百</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">Mbit</font></span><span lang="EN-US" style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">/</span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">秒以上。 <span lang="EN-US"><p></p></span></span><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 125%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">UWB</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">的特点在于不使用载波,这与此前的无线通信截然不同。传统的无线通讯技术,在通讯时将信息调制在载波信号上,因此需要消耗大量的电能;而<span lang="EN-US">UWB</span>是通过直接的脉冲电波将信息发送出去。由于只在信息传输时发出脉冲电波,因而大大减少了耗电量。<span lang="EN-US"><p></p></span></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; LINE-HEIGHT: 125%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0;"><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">UWB</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">之所以能实现高速数据传输,正是因为这种脉冲的宽度能控制在<span lang="EN-US">1</span>纳秒以下,因此实现几百</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">M</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">~</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">1Gbit</font></span><span lang="EN-US" style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">/</span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">秒以上的通信将不再是梦想。但是,发送脉冲信号需要很宽的频带。<span lang="EN-US"><p></p></span></span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 125%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">作为室内通信用途,美国联邦通信委员会</span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">(</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">FCC</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">:</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">Federal Communications Commission</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">)</span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">已经将</span><chmetcnv wst="on" unitname="g" sourcevalue="3.1" hasspace="False" negative="False" numbertype="1" tcsc="0"><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">3.1G</font></span></chmetcnv><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">~</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">10.6GHz</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">频带向<span lang="EN-US">UWB</span>通信开放。</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">IEEE802</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">委员会也已将<span lang="EN-US">UWB</span>作为<span lang="EN-US">PAN</span></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">(</span><span lang="EN-US" style="LINE-HEIGHT: 125%; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"><font face="宋体, MS Song">personal area network</font></span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Calibri;">)</span><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;">的基础技术候选对象来探讨。</span></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 125%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;"></span>
</p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 125%; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span style="LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt;"><span lang="EN-US"><p></p></span></span>
</p><p><img src="http://p15.freep.cn/p.aspx?u=v20_p15_p_0804081657411028_0.gif" border="0" alt=""/></p><p>
</p> |
|