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NTT开发了一种新的经济的小容量数字无线中继系统,称之为11S—24M.这种系统工作在11GHz频带,用于汇按中心到端局(TC—EO)之间的通路,能传输四个并行6.3Mb/s数字信号(二次数字群),使用4相移键控(4—PSK)调制和同波道频率配置.11S—24M是在11S—D3系统上的改进,11S—D3是1982年作为TC—EO通路而开发的数字中继系统.这些改进包括应用一种新的MIC和LSI和一种简单的单杆天线塔,使该系统与电缆系统同等经济.11S—24M系统将于1986年商品化,希望它在构
NTT has developed a new economical small-capacity digital wireless repeater system, called the 11S-24M, which operates in the 11GHz band for sinking between the central office and the end office (TC-EO) Can transmit four parallel 6.3Mb / s digital signals (quadratic digital group), using 4-phase shift keying (4-PSK) modulation and co-channel frequency configuration .11S-24M is 11S-D3 system improvements, The 11S-D3 was developed as a digital trunk system for the TC-EO pathway in 1982. These improvements include the application of a new MIC and LSI and a simple single-pole antenna tower to make the system as economical as a cable system.11S -24M system will be commercialized in 1986, hope it is in the structure