- What is subcarrier spacing in 5g?
- How many PRB is 5g?
- What is resource grid?
- What is NR cell?
- What is Coreset in 5g?
- What is FFT in LTE?
- What is CQI in LTE?
- What is CSI RS in 5g?
- What is a resource block?
- What is SS block in 5g?
- What is 5g numerology?
- What is re in LTE?
- What is RB and PRB in LTE?
- How many subcarriers are in 5g?
- What is a PRB in LTE?
- Why are there 12 subcarriers in LTE?
- What is synchronization raster?
What is subcarrier spacing in 5g?
Numerologies One major new feature of 5G is multiple numerologies which can be mixed and used simultaneously.
A numerology is defined by its subcarrier spacing (the width of subcarriers in the frequency domain) and by its cyclic prefix.
5G defines a base subcarrier spacing of 15 kHz..
How many PRB is 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.
What is resource grid?
Subframe Resource Grid Size Therefore, the resource grid represents a subframe (two slots) and whole bandwidth, since there are 12 subcarriers per resource block. For the single antenna case, a resource grid can be a two-dimensional matrix of the following size.
What is NR cell?
In 5G, a service provider identifies a cell using an NCI (NR Cell Identity). This is a 36bit identity which can be concatenated with the PLMN-Id (PLMN Identifier) to form the NCGI (NR Cell Global Identity).
What is Coreset in 5g?
In 5G NR, CORESET is known as Control Resource Set. It is a set of physical resources within a specific area in Downlink Resource Grid and used to carry PDCCH (DCI). … Frequency allocation in a CORESET configuration can be contiguous or non-contiguous. CORESET configuration in time spans 1-3 consecutive OFDM symbols.
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 in 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 is CSI RS in 5g?
CSI-RS refers to channel state information reference signal and these signals are downlink only signal. It is used for DL CSI acquisition. Used for RSRP measurements used during mobility and beam management. Also used for frequency/time tracking, demodulation and UL reciprocity based pre-coding.
What is a resource block?
A resource block (RB ) is the smallest unit of resources that can be allocated to a user. The resource block is 180 kHz. wide in frequency and 1 slot long in time. … Frequency units can be expressed in number of subcarriers or resource blocks.
What is SS block in 5g?
5G/NR – SS Block Home : www.sharetechnote.com. SS Block. SS Block(SSB) stands for Synchronization Signal Block and in reality it refers to Synchronization/PBCH block because Synchnronization signal and PBCH channel are packed as a single block that always moves together.
What is 5g numerology?
©3G4G In the context of 3GPP 5G standardization contributions, the term numerology refers to the configuration of waveform parameters, and different numerologies are considered as OFDM-based sub-frames having different parameters such as subcarrier spacing/symbol time, CP size, etc.
What is re in LTE?
Each subframe divides into two slots. 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.
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.
How many subcarriers are in 5g?
The physical layer of 5G-NR carries over many aspects of LTE including: Can be described in terms of a resource grid in frequency and time domain. Built on OFDMA based physical resource blocks consisting of 12 x subcarriers.
What is a PRB in LTE?
A E-UTRA PRB (Physical Resource Block) is defined as consisting of 12 consecutive subcarriers for one slot (0.5 ms). A PRB is the smallest element of resource allocation assigned by the eNB scheduler.
Why are there 12 subcarriers in LTE?
In the downlink, the subcarriers are split into resource blocks. This enables the system to be able to compartmentalise the data across standard numbers of subcarriers. Resource blocks comprise 12 subcarriers, regardless of the overall LTE signal bandwidth. They also cover one slot in the time frame.
What is synchronization raster?
The synchronization raster indicates the frequency positions of the synchronization block that can be used by the UE for system acquisition when explicit signalling of the synchronization block position is not present. A global synchronization raster is defined for all frequencies.