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振状态分别干涉，避免2路相干波形在探测光纤同一位置发生偏                             Conference and Exhibition incorporating EUROPEC,
            振衰落。通过将采集到的P光和S光解调出相位后合并求取相位                             Copenhagen, Denmark, 2012.
            标准差的方式，最终解决了偏振衰落对系统造成的影响。经过                          [7] MATEEVAA, LOPEZ J, POTTERS H, et al. Distributed
            实际测试，证明该方法可以有效降低偏振衰落造成的系统漏误                              acoustic sensing for reservoir monitoring with
            报，大幅提升DAS系统相位解调的准确性。此外，本方法较为简                            vertical seismicprofiling [J]. Geophys. Prospect,
            单，且具有成本优势，因此有望应用于实际DAS系统中减少漏误                            2014, 62(4): 679–692.
            报率，对DAS在海底电缆状态监测的推广应用具有重要的意义。                        [8] MASOUDI A, NEWSON T P. Analysis of distributed
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                distributed acoustic sensor[C]//in 74th EAGE





                                    我国 5G 基站周增超 1 万 4 月 5G 用户增加超 700 万



                5G牌照发放一年来，我国5G发展取得积极进展，网络建设速度和规模超出预期。工信部最新统计显示，我国5G基站以每周新
            增1万多个的数量在增长。目前，5G终端连接数已超过3600万。仅4月一个月，5G用户就增加了700多万。


                截至5月底，中国移动已建成14万个5G基站，今年底将完成30万基站建设任务，覆盖340多个地级以上城市。中国电信与中国
            联通累计共建共享了10多万个5G基站，双方计划提前一季度完成25万个基站的全年建设任务。

                据了解，网络建设方面，目前基础电信企业建设5G基站超过25万个，预计今年年底，我国将建设5G基站超过60万个，覆盖全
            国地级以上城市；应用创新方面，全国累计开展5G创新应用400余项，在建的“5G+工业互联网”项目超600个。



                                                       网络电信 二零二零年六月                                            53
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