- What is subcarrier LTE?
- What is subcarrier bandwidth in LTE?
- How can I improve my DL throughput in LTE?
- What is a resource block what does it consist of?
- What is resource block in 5g?
- What is FFT in LTE?
- What is CQI LTE?
- What are channels in LTE?
- What is bandwidth in LTE?
- What is the largest channel bandwidth a UE is required to support in LTE?
- What is scrambling in LTE?
- What is RB and PRB in LTE?
- What is a resource element in LTE?
- What is subcarrier spacing in LTE?
What is subcarrier LTE?
3) An entity consisting of a orthogonal symbol (0.071428 ms) & one subcarrier (15khz) is known as Resource Element (RE).
So a LTE radio frame consists of 10 subframes (i.e.
total 1 ms) in time domain & 72 subcarriers (i.e.
total 1080 Khz) in freq domain..
What is subcarrier bandwidth in LTE?
Each subcarrier is able to carry data at a maximum rate of 15 ksps (kilosymbols per second). This gives a 20 MHz bandwidth system a raw symbol rate of 18 Msps. In turn this is able to provide a raw data rate of 108 Mbps as each symbol using 64QAM is able to represent six bits.
How can I improve my DL throughput in LTE?
One thing that can really help in increasing the throughput is the optimum mobility strategy. Consider two LTE layers, for instance L800 and L1800 with same bandwidth. In this case, L800 will have a higher coverage as it is a lower frequency. So, the user count on L800 will be higher compared to L1800.
What is a resource block what does it consist of?
A Resource Element (RE) is the smallest defined unit which consists of one OFDM sub-carrier during one OFDM symbol interval. Each Resource Block consists of 12 · 7 = 84 Resource Elements in case of normal cyclic prefix (72 for extended CP). Figure 5 illustrates the definition of Resource Blocks and Resource Elements.
What is resource block in 5g?
In 5G, One NR Resource Block (RB) contains 12 sub-carriers in frequency domain similar to LTE. In LTE resource block bandwidth is fixed to 180 KHz but in NR it is not fixed and depend on sub-carrier spacing. NR Channel Bandwidth.
What is FFT in LTE?
In an LTE project, the system must support variable transmission bandwidths, including 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz. Each transmission bandwidth corresponds to a fast Fourier transform (FFT) size of 128, 256, 512, 1024, 1536, and 2048 points, respectively.
What is CQI LTE?
CQI stands for Channel Quality Indicator. As the name implies, it is an indicator carrying the information on how good/bad the communication channel quality is. This CQI is for HSDPA. (LTE also has CQI for its own purpose). CQI is the information that UE sends to the network and practically it implies the following two.
What are channels in LTE?
In order that data can be transported across the LTE radio interface, various “channels” are used. These are used to segregate the different types of data and allow them to be transported across the radio access network in an orderly fashion.
What is bandwidth in LTE?
LTE supports deployment on different frequency bandwidths. The current specification outlines the following bandwidth blocks: 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz. Frequency bandwidth blocks are essentially the amount of space a network operator dedicates to a network.
What is the largest channel bandwidth a UE is required to support in LTE?
20 MHzWhat is the largest channel bandwidth a UE is required to support in LTE? Explanation: The LTE format was first proposed by NTT DoCoMo of Japan and has been adopted as the international standard. LTE-Advanced accommodates the geographically available spectrum for channels above 20 MHz.
What is scrambling in LTE?
It is “Scrambling Code”. By using the scrambling code, NodeB can separate signals coming simultaneously from many different UEs and UE can separate signals coming simultaneously from many different NodeB. … A specific bit sequence which is used for scrambling is called ‘Scrambling code’.
What is RB and PRB in LTE?
In OFDMA, users are allocated a specific number of subcarriers for a predetermined amount of time. These are referred to as physical resource blocks (PRBs) in the LTE specifications. PRBs thus have both a time and frequency dimension.
What is a resource element in LTE?
The smallest modulation structure in LTE is the Resource Element. A Resource Element is one 15 kHz subcarrier by one symbol. Resource Elements aggregate into Resource Blocks. … Twelve consecutive subcarriers in the frequency domain and six or seven symbols in the time domain form each Resource Block.
What is subcarrier spacing in LTE?
The LTE OFDM subcarrier spacing equals 15 kHz for both downlink and uplink. The selection of the subcarrier spacing in an OFDM-based system needs to carefully balance overhead from the cyclic prefix against sensitivity to Doppler spread/shift and other types of frequency errors and inaccuracies.