Virtual Labs

What, according to you, is the primary advantage of using multiple antennas at the transmitter/receiver?

a: Increased battery life Explanation

Explanation

b: Improved received signal reliability Explanation

Explanation

c: Simplified receiver design Explanation

Explanation

d: Reduced hardware costs Explanation

Explanation

Which of the following best describes spatial diversity in wireless communications?

a: Using different time slots to send the same signal Explanation

Explanation

b: Using different frequency bands to transmit data Explanation

Explanation

c: Using multiple antennas sufficiently spaced to transmit/receive signals Explanation

Explanation

d: Using encryption techniques to secure the communication Explanation

Explanation

What is the main purpose of beamforming in MISO and MIMO systems?

A: To reduce the power consumption Explanation

Explanation

B: To direct the transmission energy towards specific users Explanation

Explanation

C: To simplify the receiver design Explanation

Explanation

D: To increase the modulation order Explanation

Explanation

When is equal gain combining (EGC) used?

A: No CSI at transmitter, but CSI present at receiver Explanation

Explanation

B: CSI known at both ends Explanation

Explanation

C: No CSI at receiver Explanation

Explanation

D: Cannot say Explanation

Explanation

What is the array gain of Equal Gain Combining (EGC)?

A: 1 Explanation

Explanation

B: 2 Explanation

Explanation

C: 3 Explanation

Explanation

D: 4 Explanation

Explanation

Which combining technique is less efficient when implemented in hardware?

A: Equal gain combining Explanation

Explanation

B: Selection combining Explanation

Explanation

C: Depends on the number of antennas Explanation

Explanation

D: Both are equally efficient Explanation

Explanation

Which of the following most accurately describes the Alamouti scheme?

A: Combining technique Explanation

Explanation

B: Space-time coding scheme Explanation

Explanation

C: Error-correcting coding Explanation

Explanation

D: None of the above Explanation

Explanation

Which of the following is computationally the most complex?

A: Selection combining Explanation

Explanation

B: Equal gain combining Explanation

Explanation

C: Maximal ratio combining Explanation

Explanation

D: All have same complexity Explanation

Explanation

Spatial Diversity