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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">我国光通信实现240Gbit/s实时传输 </h1> <p class="xg1"> 时间：2011-12-4 10:52<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(1089)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=2668&idtype=aid" title="查看全部评论"><em id="_commentnum">1</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>12月1日，武汉邮电科学院对外发布，该院承担的国家973计划项目“超高速超大容量超长距离光传输基础研究”成功实现240Gbit/s实时传输，经北京大学和工信部电信研究院专家测试，其容量指标处于国际领先水平。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content">12月1日，武汉邮电科学院对外发布，该院承担的国家973计划项目“超高速超大容量超长距离光传输基础研究”成功实现240Gbit/s实时传输，经北京大学和工信部电信研究院专家<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测试</a>，其容量指标处于国际领先水平。<br><br>互联网流量爆炸式增长带来的骨干传输网拥堵问题日益突出，光纤<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">通信</a>正在从多通道、高速率向超高速超大容量超长距离（3U）<a href="http://ofc.oecr.com" target="_blank" class="relatedlink">光通信</a>演进。 400Gbit/s和1-Tbit/s光传输技术正是构筑下一代光通信网络的核心技术和支柱。据国家973项目首席科学家、武汉邮科院余少华博士介绍，目前国际上超高速超大容量光纤通信的前沿探索有两个方式，一是通过离线研究不断刷新容量记录，另一种是通过在线实时研究向大容量商用化迈进。<br><br>武汉邮电科学研究院、光纤通信技术和网络国家重点实验室及烽火通信公司联合承担的国家973计划项目，采取离线研究方式，今年7月完成多光源 30.7Tb/s传80公里处理，相当于在一对光纤上可以实现2.75亿对人同时通话，是目前国际上C波段传输实验的最高水平。今年11月，他们用在线实时处理方式，向数字信号处理难度更大、技术要求更高的目标冲刺，成功实现240Gbit/s相干光正交频分复用（OFDM）信号在普通单模光纤上无误码实时传输48公里。<br><br>据专家介绍，这一成果标志着我国在超高速超大容量传输系统研究领域，为超高速超大容量相干光OFDM传输系统走向商用奠定了技术基础。余少华说，实现240Gbit/s实时传输得益于多项关键技术的创新。该项目在国际上首次提出“高带宽远端（非本地）本振相干接收”方法，解决了超100G高速相干光信号实时处理难题，大大提高了系统传输速率。 <DIV><FONT color="#808080" size=2><IMG src="http://www.oecr.com/xwb/images/bgimg/icon_logo.png"> 已同步至 <a href="http://ome.ac.cn/index.php?m=show&id=3386831988653052" target="_blank">update的微博</A></FONT></DIV></td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table cellpadding="0" cellspacing="0" class="atd"> 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