How can an 802.11ac wireless device use transmit beamforming to more efficiently reach a client location?

How can an 802.11ac wireless device use transmit beamforming to more efficiently reach a client location?

• The same signal can be provided to each transmitting antenna with a slight alteration to the phase of the signal so that the resulting signals will all arrive out of phase at the receiver.
• The same signal can be provided to each transmitting antenna with a slight alteration to the phase of the signal so that the resulting signals will all arrive in phase at the receiver.
• A different signal can be provided to each transmitting antenna with a slight alteration to the phase of the signal so that the resulting signals will all arrive in phase at the receiver.
• A diferent signal can be provided to each transmitting antenna with a slight alteration to the phase of the signal so that the resulting signals will all arrive out of phase at the receiver.

Explanation: When the same signal is provided to each transmitting antenna with a slight alteration to the phase of the signal, this will result in the signals arriving in phase at the receiver. These in phase signals will have a constructive effect and improve the signal quality and signal-to-noise ratio.

Exam with this question: Quiz - Wireless Signals and Modulation