... 窄带码分多址：N-CDMA 窄带广播：Narrow Band Broadcast 窄带个人通信服务：NPCS Narrowband Personal Communications Service ...
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We can think of such a transmission as a combination of many narrow band signals at adjacent frequencies, all broadcast simultaneously as a single broad-band signal.
我们可以把这种信号想象成在很多很多个窄频带上同时的播报同一个信号的组合。
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