eICIC in Heterogeneous Networks Quiz

What is the purpose of eICIC in HetNet?

To mitigate interference on traffic and control channels (correct)
To introduce more interference on control channels
To reduce power consumption in Heterogeneous Networks
To increase interference on traffic channels

Which domains does eICIC use to mitigate intra-frequency interference in heterogeneous networks?

Frequency and time domain only
Power, frequency, and time domain (correct)
Power and frequency only
Time domain only

What is the purpose of Almost Blank Subframes (ABS) in eICIC?

To increase interference from control channels
To switch off all channels
To carry user data
To reduce interference from macro-cells (correct)

What does Carrier Aggregation (CA) aim to achieve?

Improve end user throughput by increasing channel bandwidth (A) Signup and view all the answers

How many Component Carriers can the 3GPP specifications support for Carrier Aggregation in release 10?

Up to 5 Component Carriers (B) Signup and view all the answers

Where can Component Carriers be located in Carrier Aggregation?

They can be located in different operating bands (D) Signup and view all the answers

What is the key purpose of MIMO spatial multiplexing?

To increase the throughput capability of the wireless system (C) Signup and view all the answers

What is the minimum requirement for the number of receive antennas in a MIMO spatial multiplexing system?

The number of receive antennas must be equal to the number of transmit antennas (D) Signup and view all the answers

How are the different data streams differentiated at the receiver in a MIMO spatial multiplexing system?

By using the different channel properties (represented by h-parameters) between the transmit and receive antennas (D) Signup and view all the answers

What is the matrix representation of the MIMO spatial multiplexing system described in the text?

[R] = [H] x [T] (A) Signup and view all the answers

What is the purpose of the signal processing performed at the receiver in a MIMO spatial multiplexing system?

All of the above (D) Signup and view all the answers

How many transmit and receive antennas are used in the example MIMO spatial multiplexing system described in the text?

3 transmit antennas and 3 receive antennas (D) Signup and view all the answers

What is one of the key advantages of MIMO spatial multiplexing?

Additional channel robustness (C) Signup and view all the answers

Which law governs the maximum amount of data that can be carried by a radio channel?

Shannon's Law (C) Signup and view all the answers

What is one of the trade-offs to consider when implementing MIMO systems?

Balancing performance against costs (C) Signup and view all the answers

Which technology provides a method to increase data rates beyond those possible on a single channel?

MIMO spatial multiplexing (D) Signup and view all the answers

What does MIMO spatial multiplexing utilize to carry additional data?

"Channels" formed by multiple paths (A) Signup and view all the answers

What is the significance of Shannon's Law in the context of MIMO technology?

Sets theoretical limits on data transmission with noise (B) Signup and view all the answers

What does MIMO stand for in the context of wireless technology?

Multiple Input Multiple Output (D) Signup and view all the answers

How does fading affect a wireless channel?

Increases error rate (C) Signup and view all the answers

Which diversity mode uses different timeslots and channel coding for transmission?

Time diversity (A) Signup and view all the answers

What form of diversity utilizes different frequencies in its operation?

Frequency diversity (B) Signup and view all the answers

In what way does space diversity differ from time and frequency diversity?

It utilizes antennas in different positions for signal reception (D) Signup and view all the answers

Which technology relies on antennas placed at different positions to leverage various radio paths?

MIMO (D) Signup and view all the answers

What is the main advantage of using adaptive array systems (AAS) over phased array systems for MIMO beamforming?

AAS can be adjusted to the requirements in real-time, unlike the fixed beams in phased array systems. (A) Signup and view all the answers

Which of the following statements about the use of beamforming techniques is NOT correct?

Beamforming techniques can only be used with MIMO systems. (D) Signup and view all the answers

In a MIMO beamforming system using phased array antennas, how is the required beam direction determined?

The system has a set of pre-defined beam patterns and selects the one closest to the required direction. (D) Signup and view all the answers

What is the main difference between phased array systems and adaptive array systems (AAS) in terms of their antenna patterns?

Phased array systems have an infinite number of patterns, while AAS have a finite number of adjustable patterns. (B) Signup and view all the answers

What is the main purpose of using beamforming techniques in an antenna system?

To create a specific antenna directive pattern to meet the required performance. (D) Signup and view all the answers

Which of the following statements about the use of smart antennas in beamforming systems is correct?

Smart antennas are used to automatically control the antenna pattern based on the required performance and prevailing conditions. (C) Signup and view all the answers