Which technique is used to reduce interference in wireless communication?

Which technique is used to reduce interference in wireless communication?

• A. Time Division Multiple Access (TDMA)
• B. Frequency Division Multiple Access (FDMA)
• C. Spread spectrum technology
• D. Simplex communication

Answer: (C)

The chosen technique, spread spectrum technology, is effective in reducing interference in wireless communication. This approach involves spreading the signal over a broader bandwidth than the minimum required to send the information. By doing so, it makes the transmission less susceptible to interference from other signals and noise, which can be particularly beneficial in environments where multiple transmissions occur simultaneously. Spread spectrum enables more robust communication by using techniques such as frequency hopping or direct sequence spread spectrum (DSSS). This not only helps mitigate the impact of interference but also enhances security and makes it challenging for unauthorized listeners to intercept the signal. The other methods listed, such as Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA), manage how multiple users access the shared medium by allocating time slots or distinct frequency bands, respectively. While these techniques can help organize communication and potentially reduce collision among users, they do not inherently provide the same level of interference immunity as spread spectrum technology. Simplex communication, which refers to one-way communication, does not address interference issues, as it lacks the mechanisms to manage multiple access or signal robustness in the same way that spread spectrum does.

The chosen technique, spread spectrum technology, is effective in reducing interference in wireless communication. This approach involves spreading the signal over a broader bandwidth than the minimum required to send the information. By doing so, it makes the transmission less susceptible to interference from other signals and noise, which can be particularly beneficial in environments where multiple transmissions occur simultaneously.

Spread spectrum enables more robust communication by using techniques such as frequency hopping or direct sequence spread spectrum (DSSS). This not only helps mitigate the impact of interference but also enhances security and makes it challenging for unauthorized listeners to intercept the signal.

The other methods listed, such as Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA), manage how multiple users access the shared medium by allocating time slots or distinct frequency bands, respectively. While these techniques can help organize communication and potentially reduce collision among users, they do not inherently provide the same level of interference immunity as spread spectrum technology. Simplex communication, which refers to one-way communication, does not address interference issues, as it lacks the mechanisms to manage multiple access or signal robustness in the same way that spread spectrum does.