eICIC in Heterogeneous Networks Quiz
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Questions and Answers

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?

    <p>Improve end user throughput by increasing channel bandwidth</p> Signup and view all the answers

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

    <p>Up to 5 Component Carriers</p> Signup and view all the answers

    Where can Component Carriers be located in Carrier Aggregation?

    <p>They can be located in different operating bands</p> Signup and view all the answers

    What is the key purpose of MIMO spatial multiplexing?

    <p>To increase the throughput capability of the wireless system</p> Signup and view all the answers

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

    <p>The number of receive antennas must be equal to the number of transmit antennas</p> Signup and view all the answers

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

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

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

    <p>[R] = [H] x [T]</p> Signup and view all the answers

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

    <p>All of the above</p> 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?

    <p>3 transmit antennas and 3 receive antennas</p> Signup and view all the answers

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

    <p>Additional channel robustness</p> Signup and view all the answers

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

    <p>Shannon's Law</p> Signup and view all the answers

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

    <p>Balancing performance against costs</p> Signup and view all the answers

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

    <p>MIMO spatial multiplexing</p> Signup and view all the answers

    What does MIMO spatial multiplexing utilize to carry additional data?

    <p>&quot;Channels&quot; formed by multiple paths</p> Signup and view all the answers

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

    <p>Sets theoretical limits on data transmission with noise</p> Signup and view all the answers

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

    <p>Multiple Input Multiple Output</p> Signup and view all the answers

    How does fading affect a wireless channel?

    <p>Increases error rate</p> Signup and view all the answers

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

    <p>Time diversity</p> Signup and view all the answers

    What form of diversity utilizes different frequencies in its operation?

    <p>Frequency diversity</p> Signup and view all the answers

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

    <p>It utilizes antennas in different positions for signal reception</p> Signup and view all the answers

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

    <p>MIMO</p> Signup and view all the answers

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

    <p>AAS can be adjusted to the requirements in real-time, unlike the fixed beams in phased array systems.</p> Signup and view all the answers

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

    <p>Beamforming techniques can only be used with MIMO systems.</p> Signup and view all the answers

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

    <p>The system has a set of pre-defined beam patterns and selects the one closest to the required direction.</p> 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?

    <p>Phased array systems have an infinite number of patterns, while AAS have a finite number of adjustable patterns.</p> Signup and view all the answers

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

    <p>To create a specific antenna directive pattern to meet the required performance.</p> Signup and view all the answers

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

    <p>Smart antennas are used to automatically control the antenna pattern based on the required performance and prevailing conditions.</p> Signup and view all the answers

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