Lte University Expert Quiz - 2009

20 Questions | By Mwolleben | Updated: Mar 22, 2022 | Attempts: 5720

Questions

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Do you consider yourself an expert on LTE, WiMAX, 4G and other advanced wireless technologies? Test your current skills and knowledge by answering technical questions taken from actual LTE, WiMAX and 4G training classes. These classes are offered by the worlds leading authority on wireless training, Award Solutions. LTE University presents the LTE University Expert Quiz. On this sample quiz visitors are asked to answer 25 random questions from a pool of 150. Some questions will be easy and some are very difficult. See how you score compared to other professionals in the industry. Scoring Options Master - You are a LTE Master!Expert - You know more than mostRegular - Getting there but need to studyAp

Questions and Answers

1.

What organization is responsible for developing LTE standards?
- A.
  
  UMTS
- B.
  
  3GPP
- C.
  
  3GPP2
- D.
  
  ISO
2.

Which type of cell provides the best level of service for average subscribers?
- A.
  
  Acceptable cell
- B.
  
  Barred Cell
- C.
  
  Reserved Cell
- D.
  
  Suitable Cell
3.

What types of handover are supported in LTE?
- A.
  
  Hard handover only
- B.
  
  Hard and soft handovers
- C.
  
  Hard, soft and softer handovers
- D.
  
  Handover is not supported
4.

What does the DC subcarrier indicate?
- A.
  
  The identity of the cell
- B.
  
  The antenna configuration
- C.
  
  The center of the OFDM channel
- D.
  
  The format of the data channel
5.

What processing step combines multiple OFDM subcarriers into a single signal for transmission?
- A.
  
  FFT
- B.
  
  IFFT
- C.
  
  RF Combining
- D.
  
  Channel Mapping
6.

In MIMO, which factor has the greatest influence on data rates?
- A.
  
  The size of the antenna
- B.
  
  The height of the antenna
- C.
  
  The number of transmit antennas
- D.
  
  The number of receive antennas
7.

What property of OFDMA systems allows adjacent subcarriers to be used without interference?
- A.
  
  Orthogonality
- B.
  
  Orthodoxy
- C.
  
  Octagonality
- D.
  
  Originality
8.

Which channel indicates the number of symbols used by the PDCCH?
- A.
  
  PHICH
- B.
  
  PDCCH
- C.
  
  PBCH
- D.
  
  PCFICH
9.

With the normal Cyclic Prefix, how many symbols are contained in 1 frame?
- A.
  
  7
- B.
  
  12
- C.
  
  20
- D.
  
  140
10.

What is the largest channel bandwidth a UE is required to support in LTE?
- A.
  
  20 MHz
- B.
  
  10 MHz
- C.
  
  5 MHz
- D.
  
  1.4 MHz
11.

If the UE detects primary synchronization sequence x and secondary synchronization sequence y, what is the physical cell ID?
- A.
  
  The physical cell ID cannot be determined from the synchronization signals
- B.
  
  X+y
- C.
  
  3x+y
- D.
  
  X+3y
12.

Which RLC mode adds the least amount of delay to user traffic?
- A.
  
  Acknowledged Mode (AM)
- B.
  
  Unacknowledged Mode (UM)
- C.
  
  Transparent Mode (TM)
- D.
  
  Low Latency Mode (LM)
13.

In LTE, what is the benefit of PAPR reduction in the uplink?
- A.
  
  Improved uplink coverage
- B.
  
  Lower UE power consumption
- C.
  
  Reduced equalizer complexity
- D.
  
  All of the above
14.

What is the PBCH scrambled with?
- A.
  
  The physical cell ID
- B.
  
  The current frame number
- C.
  
  The UE's C-RNTI
- D.
  
  The PBCH is not scrambled
15.

How much bandwidth is required to transmit the primary and secondary synchronization signals?
- A.
  
  1.4 MHz
- B.
  
  1.08 MHz
- C.
  
  930 kHz
- D.
  
  Up to 20 MHz
16.

What is the length of the shortest possible PDCCH, in bits?
- A.
  
  72
- B.
  
  144
- C.
  
  288
- D.
  
  576
17.

Why is the Cyclic Prefix a copy of the tail end of the symbol?
- A.
  
  It ensures a continuous time domain signal
- B.
  
  It maintains an integer number of cycles
- C.
  
  It reduces the Peak-to-Average Power Ratio (PAPR)
- D.
  
  It increases the useful symbol time
18.

With PRACH configuration 14, what are the odds that two UE's will collide during their random accesses?
- A.
  
  1 in 10
- B.
  
  1 in 64
- C.
  
  1 in 640
- D.
  
  It is impossible to collide on the PRACH
19.

Approximately what portion of a subframe in a 1.4 MHz channel is available for carrying the PDSCH?
- A.
  
  1/2
- B.
  
  1/4
- C.
  
  3/4
- D.
  
  1/6
20.

Why is a Cyclic Prefix required in OFDMA?
- A.
  
  The Metropolitan museum of art
- B.
  
  Boston Smithsonian
- C.
  
  NASA
- D.
  
  Washington Smithsonian institution museum of fine art