Because gigabit ethernet supports transmission speeds of roughly 1 , 000 mbps , many network gurus assume that installing a few gigabit ethernet nics and attaching the cabling and a high - speed switch will make their networks perform at warp speeds 由于千兆以太网支持大约每秒1000兆比特的传输速度，所以许多专家都认为，只要安装了千兆以太网网卡、配上线缆和高速交换机，网络就可以以每秒1000兆比特的速度运行了。
Ningbo megabit photoelectric science & tech - nology co . , ltd . is located at the east garden of guanhaiwei indutrial at the east garden of guanhaiwei industrial zone , cixi city of zhejiang province . which is a private joint stock company established in accordance with modern enterprise integrating r & d , production and trade into one 宁波兆比特光电科技有限公司位于浙江省慈溪市观海卫镇工业园东区，是一家以现代企业制度组建的民营股份制公司，集科、工、贸为一体的高新技术企业。
Extremely short period pulses have been employed in this technology ( usually as short as several nanoseconds or even several picoseconds ) , which results in the transmission capability of up to gigabits per second [ 1 - 4 ] . because of the high transmission rate , uwb communications are best suited for wireless personal area networks ( wpan ) Uwb技术采用超短脉冲发射技术(纳秒乃至皮秒量级) ,占用的频谱可达几个ghz ,这使得其在短距离内可达到几百兆比特的传输速率[ 1 - 4 ] ,该技术因此而非常适于近距离高速无线个人域网[ 2 ] ( wpan ) 。
This dissertation discuss the key technology of wide band digital t / r module , including : architecture of the wide band digital t / r module ; wide band signal generating technology based on ddws ; using fiber technology to transmit data between radar center and t / r moudle . after studying the digtal t / r module technology over the world , this dissertation present a scheme of l band ( 1300mhz ) wide band ( b = 100mhz ) digital t / r module , and design a test board to verify transmitting technology of wide band digital t / r module , it works at l band . it use gigabit fiber components to transmit data between radar center and t / r module , use ddws and quadrature modulate technology to generate wide band radar transmitting signal , all control signal is generated by fpga 本文探讨了宽带数字t / r组件发射通道的关键技术,主要包括:数字t / r组件的体系结构、基于ddws技术的宽带信号的产生以及数字t / r组件收发数据的光传输技术。本文在深入研究了国内外数字t / r组件技术的基础上,提出了一种l波段( 1300mhz )宽带( b = 100mhz )数字t / r组件的原理框图,并且设计了试验板来验证宽带数字t / r组件发射通道技术。该试验板采用千兆比特光纤技术实现宽带数字t / r组件与雷达主机的数据传输,采用ddws加正交调制技术产生宽带雷达信号,采用一片fpga完成整个组件的控制。
