LTE Objective Questions

1.	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

2.	Which UE categories support 64QAM on the uplink?

A.	Only category 5

B.	Categories 3, 4 and 5

C.	None of them

D.	All of them

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.	Why is a Cyclic Prefix required in OFDMA?

A.	To ensure the symbol time is an integer number

B.	To help overcome multipath and inter-symbol interference

C.	To maintain orthogonality

D.	To make OFDMA scalable

5.	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

6.	What processing step combines multiple OFDM subcarriers into a single signal for transmission?

A.

FFT

B.

IFFT

C.	RF Combining

D.	Channel Mapping

7.	What is the minimum amount of RF spectrum needed for an FDD LTE radio channel?

A.

1.4 MHz

B.

2.8 MHz

C.

5 MHz

D.

20 MHz

8.	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

9.	What organization is responsible for developing LTE standards?

A.

UMTS

B.

3GPP

C.

3GPP2

D.

ISO

10.	Which channel indicates the number of symbols used by the PDCCH?

A.

PHICH

B.

PDCCH

C.

PBCH

D.

PCFICH

11.	How often can resources be allocated to a UE?

A.	Every symbol

B.	Every slot

C.	Every subframe

D.	Every frame

12.	What property of OFDMA systems allows adjacent subcarriers to be used without interference?

A.	Orthogonality

B.

Orthodoxy

C.	Octagonality

D.	Originality

13.	With the normal Cyclic Prefix, how many symbols are contained in 1 frame?

A.

7

B.

12

C.

20

D.

140

14.	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

15.	In OFDM, what is the relationship between the subcarrier spacing f and the symbol time t?

A.	There is no fixed relation

B.

f = t

C.	f x t = 2048

D.

f = 1/t

16.	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

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.	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

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.	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

21.	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)

22.	What coding scheme is used for the DL-SCH and UL-SCH?

A.	1/3 tail-biting convolutional code

B.	1/3 turbo code

C.	Variable-rate block code

D.	1/3 repetition code

23.	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

24.	What is the length of the shortest possible PDCCH, in bits?

A.

72

B.

144

C.

288

D.

576

25.	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

Source: From Google