12 Questions
What is the main reason for the design limitations of UMTS?
UMTS was designed with a wide carrier bandwidth of 5 MHz.
What is the impact of increasing the bandwidth of the carrier in UMTS?
The time between two transmission steps decreases.
What is the main improvement of LTE over UMTS?
LTE was designed with a wider carrier bandwidth than UMTS.
What causes multipath fading in UMTS?
Radio waves bouncing off objects on the way from transmitter to receiver.
What is the main reason for designing LTE?
To improve the performance of UMTS.
What is the carrier bandwidth of UMTS?
5 MHz
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.
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.
What is the baseline set for LTE devices regarding Multiple Input Multiple Output (MIMO) transmissions?
All LTE devices must support MIMO transmissions.
What is the method used in LTE to separate uplink and downlink transmissions in most parts of the world?
Frequency Division Duplex (FDD).
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.
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.
Test your knowledge on the main improvements of Long-Term Evolution (LTE) over UMTS in the areas of radio network and core network. Learn about the evolution from UMTS to LTE as described in Chapter 3 of UMTS.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
