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LTE Network Improvements Quiz

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Questions and Answers

What is the main reason for the design limitations of UMTS?

UMTS was designed with a narrow carrier bandwidth of 5 MHz.

UMTS was not designed by Third Generation Partnership Project (3GPP).

UMTS did not consider multipath fading in its design.

UMTS was designed with a wide carrier bandwidth of 5 MHz. (correct)

What is the impact of increasing the bandwidth of the carrier in UMTS?

The impact of multipath fading on the received signal decreases.

The time between two transmission steps decreases. (correct)

The time between two transmission steps increases.

The impact of multipath fading on the received signal increases.

What is the main improvement of LTE over UMTS?

LTE was designed with a carrier bandwidth of 5 MHz.

LTE has a shorter time between two transmission steps.

LTE was designed with a wider carrier bandwidth than UMTS. (correct)

LTE has a higher impact of multipath fading on the received signal.

What causes multipath fading in UMTS?

Radio waves bouncing off objects on the way from transmitter to receiver. (A) Signup and view all the answers

What is the main reason for designing LTE?

To improve the performance of UMTS. (B) Signup and view all the answers

What is the carrier bandwidth of UMTS?

5 MHz (B) Signup and view all the answers

What is the main difference between LTE and UMTS regarding the multipath effect?

LTE reduces the multipath effect due to longer transmission steps, while UMTS has shorter transmission steps. (A) Signup and view all the answers

What is the purpose of increasing the number of narrowband carriers in LTE?

To increase the overall transmission speed without changing the parameters for the narrowband channels. (D) Signup and view all the answers

What is the baseline set for LTE devices regarding Multiple Input Multiple Output (MIMO) transmissions?

All LTE devices must support MIMO transmissions. (A) Signup and view all the answers

What is the method used in LTE to separate uplink and downlink transmissions in most parts of the world?

Frequency Division Duplex (FDD). (A) Signup and view all the answers

What is the main difference between Frequency Division Duplex (FDD) and Time Division Duplex (TDD) in LTE?

FDD separates uplink and downlink transmissions using different carriers, while TDD uses the same carrier. (A) Signup and view all the answers

Which statement is true regarding the datarates that can be achieved with a single-stream transmission and MIMO transmissions in LTE?

Under very good signal conditions, the datarates that can be achieved with MIMO transmissions are beyond those that can be achieved with a single-stream transmission. (D) Signup and view all the answers