What is the purpose of Spread Spectrum technique in data transmission?

The Spread Spectrum technique is primarily used in data transmission to decrease interference and increase security. This method spreads the signal over a wider bandwidth than the minimum bandwidth necessary to transmit the information. By doing so, it becomes more resistant to interference from other signals and noise in the environment, thereby enhancing the quality and reliability of the data transmission.

Moreover, the spread spectrum technique adds a layer of security because it makes it more challenging for unauthorized users to intercept and decipher the data. The spreading of the signal can involve techniques such as frequency hopping or direct sequence spreading, which are designed to obscure the signal and make it less susceptible to eavesdropping.

In contrast, the other options do not align with the core purpose of spread spectrum technology. The transmission of detailed video content is not specifically aided by spread spectrum; rather, it focuses on the bandwidth used for video, which can be separate from the spread spectrum technique. Extending battery life is more related to power management strategies in devices, while increasing the frequency of the original signal does not adequately characterize the benefits of spread spectrum, which is about increasing the bandwidth rather than simply raising frequency.