CDMA is usually a digital cellular engineering that makes use of spread spectrum methods to help multiple consumers to share a similar frequency band, making it possible for extra successful use from the available spectrum.
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Video clip Conferencing: EVDO's bidirectional data abilities and diminished latency ended up helpful for video conferencing and movie calling applications. It allowed for smoother plus much more reputable video clip communication.
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CDMA technologies permits multiple people to share the exact same frequency band at the same time by assigning a singular code (or channelization code) to each person. This code distinguishes a person consumer's data from Yet another's on the identical frequency.
是利用电磁波的反射特性来探测目标。雷达发射机产生特定频率、波形的电磁波，经由天线向空间定向辐射，形成具有一定方向性的波束。当波束遇到目标物体时，电磁波会在目标表面发生反射，其中部分反射波沿着原路返回被雷达天线接收，接收机对微弱的回波信号进行放大、滤波、解调等一系列精细处理，提取出目标的距离、方位、速度等关键信息。这一过程如同向黑暗中投掷石子，通过聆听回声来判断周围物体的位置
While in the forward direction, radio alerts are transmitted by base stations (BTS's). Each and every BTS is synchronized with a GPS receiver so transmissions are tightly controlled in time.
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帧同步 ：指将接收的数据序列按照传输时的帧结构正确地划分开来。帧同步一般需要在码片同步的基础上，利用特定的同步序列进行。
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The voice provider can be facilitated through the Voice over IP (VoIP) technology or even a cdma2000 one x fallback. The latter is the greater popular method utilized by CDMA-dependent mobile operators.
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