Modulation is the method by which a high-frequency digital signal is grafted onto a lower-frequency analog wave, so that digital packets are able to ride piggyback on the analog airwave.
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30 voice channels, 1 signaling channel, & 1 synchronization channel.
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Sunday, March 16, 2008
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Time Division Multiple Access (TDMA) is a second-generation modulation standard using bandwidth allocated in the 800 MHz, 900 MHz, and 1900MHz ranges.
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Monday, May 12, 2008
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Electromagnetic wave or alternating current of a single frequency, suitable for modulation by another, data-bearing signal.
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Saturday, May 10, 2008
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Amplitude Modulation. Modulation technique whereby information is conveyed through the amplitude of the carrier signal. Compare with FM and PAM.
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Saturday, May 10, 2008
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Adaptive Differential Pulse Code Modulation. Process by which analog voice samples are encoded into high-quality digital signals.
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Saturday, May 10, 2008
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