Communications engineering. DSSS is used for radio communication for WLANs, GPS, UMTS. The 2.4 GHz frequency band is divided into 22 MHz to 26 MHz wide frequency bands which are used for the transmission of the modulated signal. The signal that is to be transmitted is multiplied with the spread code whose data rate is higher than the signal's. This results in an eleven bit sequence for each bit from the original signal. Therefore a wider frequency range is requested for the transmission but at the same time the interference safety and the interception safety is increased.
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