How does Frequency Hopping Spread Spectrum (FHSS) transmit radio signals?

How does Frequency Hopping Spread Spectrum (FHSS) transmit radio signals?

• A. By using a constant frequency for all transmissions
• B. By rapidly switching among many frequency channels
• C. By amplifying the signal strength
• D. By encoding data into slower signals

Answer: (B)

Frequency Hopping Spread Spectrum (FHSS) transmits radio signals by rapidly switching among many frequency channels. This technique enhances security and reduces interference by changing the frequency used for transmission at predetermined intervals. By doing so, the signal is less susceptible to jamming and eavesdropping because an attacker would have to know the specific hopping pattern to intercept the communication. This method spreads the signal over a wider bandwidth, allowing it to coexist with multiple signals and minimizing the impact of potential interference. The resilience of FHSS to various forms of interference and its ability to maintain a stable connection even in noisy environments are significant advantages in wireless communication. In contrast to other options, using a constant frequency for all transmissions would make the signal more vulnerable to interference and eavesdropping. Amplifying signal strength does not directly relate to the FHSS technique; while it can improve signal quality, it does not define how the system transmits data. Encoding data into slower signals is a different technique that does not describe the method employed by FHSS. Thus, the characteristic of rapidly switching among many frequency channels accurately captures the essence of how FHSS operates.

Frequency Hopping Spread Spectrum (FHSS) transmits radio signals by rapidly switching among many frequency channels. This technique enhances security and reduces interference by changing the frequency used for transmission at predetermined intervals. By doing so, the signal is less susceptible to jamming and eavesdropping because an attacker would have to know the specific hopping pattern to intercept the communication.

This method spreads the signal over a wider bandwidth, allowing it to coexist with multiple signals and minimizing the impact of potential interference. The resilience of FHSS to various forms of interference and its ability to maintain a stable connection even in noisy environments are significant advantages in wireless communication.

In contrast to other options, using a constant frequency for all transmissions would make the signal more vulnerable to interference and eavesdropping. Amplifying signal strength does not directly relate to the FHSS technique; while it can improve signal quality, it does not define how the system transmits data. Encoding data into slower signals is a different technique that does not describe the method employed by FHSS. Thus, the characteristic of rapidly switching among many frequency channels accurately captures the essence of how FHSS operates.