What technique does Direct Sequence Spread Spectrum (DSSS) use to protect signals?

Direct Sequence Spread Spectrum (DSSS) employs a technique where the original data signal is multiplied by a pseudo-random noise-spreading code. This process spreads the signal over a wider bandwidth than the minimum required. The main purpose of this technique is to provide increased resistance to interference and improve security, making it more difficult for unauthorized users to decode the transmitted signal.

By using a pseudo-random noise code, DSSS effectively spreads the signal across multiple frequencies, which helps to minimize the impact of noise and jamming, while simultaneously allowing multiple signals to occupy the same frequency band without interfering with one another. This is a key advantage in wireless communications, as it enhances the robustness and integrity of the transmitted data.