Spread spectrum techniques are methods used in telecommunications to spread a signal over a wider bandwidth than the minimum required. This approach enhances the signal's resistance to interference and jamming, making it more reliable for communication. Commonly used in technologies like Wi-Fi and GPS, these techniques help maintain a clear signal even in crowded frequency environments. There are two main types of spread spectrum techniques: Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS). FHSS rapidly switches the carrier frequency among many channels, while DSSS spreads the signal by multiplying it with a pseudo-random noise sequence. Both methods improve security and reduce the likelihood of signal interception.