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由机电部电科院主持,对我校承担的“移动通信信道传输数字调制技术”等四项“七五”军事电子预研项目于1991年6月19日进行了技术鉴定。①“移动通信信道传输数字调制技术”——GMSK调制技术是八十年代国际上广泛研究的新型窄带数字调制技术,具有振幅恒定,频谱宽度窄和带外衰减快的特点,该课题在GMSK信号产生方面,采用一次形成受调信号的波形存储法,在信号解调制方面,采用门限受控的二电平反馈判决方案进行非相干检测,能获得6dB的信号功率节约。该课题
Under the auspices of the Electric Power Research Institute of the Ministry of Electrical and Mechanical Services, four “75” military electronic pre-research projects such as the “Digital Modulation Technology for Mobile Communication Channel Transmission” undertaken by our school were conducted technical appraisal on June 19, ① “Mobile communication channel transmission digital modulation technology” - GMSK modulation technology is a new type of narrowband digital modulation technology widely researched in the 1980s. It has the characteristics of constant amplitude, narrow spectrum width and fast out-of-band attenuation. Generate, the formation of a modulated signal waveform storage method, the signal demodulation, the use of threshold-controlled two-level feedback decision scheme for non-coherent detection, can be 6dB signal power savings. The subject