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CDMA, TDMA and FDMA.

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Posted by waqqas1

Spread-Spectrum Modulation is used in CDMA, TDMA and FDMA. Also allows communication to utilize more bandwidth than required.

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Posted by rickwalker

Definition: The process of using a second modulating signal which is independent of the data and has the effect of increasing the bandwidth of the transmitted signal to well beyond the bandwidth of the data signal.

NOTE: Spread Spectrum Modulation is distinguished from wideband modulation schemes such as wideband Frequency Modulation (FM) by noting that in spread spectrum the waveform causing the spreading is independent of the data being transmitted. This permits the spreading waveform to be selected based on improving system performance in some way.

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Posted by sagitraz