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MMDs数字发射机用来实现点到面的数字电视地面微波传输,其基带传输采用了数字压缩技术,将每路标准清晰度电视(S DTv)节目的2 16~27oMbPs原始码率压缩至2-SMbPs;频带传输则采用了多电平(多阶)调幅的
MMDs digital transmitters are used to implement point-to-surface digital terrestrial microwave transmission. The baseband transmission adopts digital compression technology to compress the original code rate of 2 16 ~ 27oMbPs of each standard definition television (S DTv) program to 2- SMbPs; Bandwidth transmission uses multi-level (multi-level) amplitude modulation