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超外差接收
释义
超外差接收
Encyclopedia
工学
【通信基础理论】
释
superheterodyne receiving
超外差接收
将接收到的已调高频信号(即调制后的高频信号)送到混频器,然后与本地振荡器所产生的高频信号进行混频,在其输出端得到的波形包络形状与输入高频信号相同,但频率却降为某一固定中间频率(简称中频)的信号接收技术。
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ocean carbon reservoir
ocean circulation
ocean coal freight index, OCFI
ocean color meter
ocean color remote sensing
ocean colour remote sensing
ocean convergence zone
ocean current
ocean current energy
ocean current in marginal sea of China
ocean current map
ocean current measurement
ocean currents
ocean deoxygenation
ocean depth gradient
ocean disasters in China
Ocean Drilling Program,ODP
ocean dumping
ocean dumping space
ocean dynamics
ocean ecological engineering method
ocean electric power transport space
ocean energy
ocean energy power generation
ocean engineering
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