1. LTE-A Frame Structure. e. There are two types of frame structure in the LTE standard, Type 1 and Type 2. design, LTE frame structure dedicated some channels for data and they are called data channels while others for control information, known as control channels. that are configurable. RACH Configuration . 3 Downlink frame structure 190 9. One subframe consists of two slots each having 0. divided into symbols – each slot has either 6 or 7 symbols. This site is for everything on 4G/LTE. OFDM with a cyclic prefix is the basic modulation scheme selected to combat severe frequency-selective multipath fading. If you are interested in some historical aspects of the 5G Frame structure, it would be good to read through this. The duration of each subframe is 1 ms. LTE-V2X PHY-layer Structure 10 LTE frames divided into 1 subframes Channel divided into resource blocks (RBs) 180 kHz RB contains:. 1. The type 1 FDD-based radio frame structure is shown in Figure 2. Time Domain transmission pattern of SS Block in NR is more complicated than LTE SS Block (Actually LTE has only one pattern of SSB Transmission in Time Domain as shown in LTE Frame Structure. Simplified LTE network elements and interfaces 3GPP TS 36. 25 MHz to 20 MHz. The SR is utilized to request the UL-SCH resources to establish a data transmission. 2 DSUDDDSUDD (10ms duration), where different special subframe “S” configurations are possible such 1 5G frame structures provide a fixed overall structure for defining data block transmission timing. Type 2: used for the LTE TDD systems. Each two consecutive time slots are combined as one. There are two types of LTE frame structure: 1. 5 Downlink distributed transmission 178 8. The IP packet is enveloped in the 4G-LTE layers: 4G-LTE Packet Structure. For example, the length of PRACH with preamble format 0 is (3186 + 24567) Samples. Normally, it uses UpPTS sub-frame. LTE Frame Structure Made Simple. However, unlike LTE-U, LAA use a special physical layer frame structure called Frame Structure Type 3 which didn't exisit before. RACH is responsible for the Random-Access process. This frame system is used where there are possibilities of heavy rain and snow. 211: “Physical Channels and Modulation” - 3GPP TS 36. It has 10 sub frames. 5 ms each. 3) is used for Frequency Division Duplex (FDD) mode;. It is defined as 1/ (15000 x 2048) seconds (=0. The LTE radio frame for downlink and uplink transmission is long. LTE Frame Structure. FDD is operated in the paired spectrum (see Sect. SONET/SDH is referred as octet synchronous. DCI DCI . Some of high level description you can get from this figure would be i) Time duration for one frame (One radio frame, One system frame) is 10 ms. As shown in the diagram, This radio frame is made up of two half frames, each lasting 5ms, for a total frame duration of around 10ms. Bits are transmitted serially. The general idea is that the LTE subframe is made up of PDCCH and PDSCH as explained in my article LTE Frame Structure Made Simple. 5 ms. iv) Transmit every 40 ms , repeat every 10 ms . Yang Chamsol. In LTE, only 2 slots are available. If the PSS is successfully detected, it means the start of the LTE frame is found and frequency synchronization can be established. Dynamic part is called as SIB and is mapped on RRC SI messages (SI-1,2,3,4,5,6,7,8,9,10,11) over DL-SCH and transmitted using PDSCH at periodic intervals. LTE employs a time division duplex (TDD) or frequency division duplex (FDD) mode, each with a specific frame structure. The fig-2 depicts the TETRA frame structure. LTE standard has been published by 3GPP as an extension of UMTS (based on 3GPP standard) and 1xEV-DO (base on 3GPP2 standard. This will give a big boost as this is about 2. There are two types of LTE frame structures. MasterInformationBlock ::= SEQUENCE { dl-Bandwidth ENUMERATED { n6, n15, n25, n50, n75, n100},Signal Studio for LTE/LTE-Advanced FDD currently supports only FDD and frame structure type 1. Prasad. The Fading parameters are available for Advanced LTE and Advanced LTE-A TDD carriers only. This generic frame structure is used with FDD. No of Slots per Sub frame =2. 4 Synchronization signals 191The 5G NR frame structure supports Frequency Division Duplex (FDD) operating during transmissions in the paired spectrum, while Time Division Duplex (TDD) is used for the unpaired spectrum. Type 1: Used in LTE FDD. This video looks at OFDM waveforms, and the different subcarrier spacings supported in 5G NR. 3GPP defines two types of frames based. Frame structure 5G. This frame consists of 20 slots as shown in figure-1. They are chosen to be the same as in LTE, thereby allowing for better LTE-NR co-existence. Frame Structure 10ms frames 10. It consists of a 10 ms radio frame divided into 20 slots, each with a duration of 0. 0 Release 10 . July 2012. Low Layer Procedures DCI HARQ PHY Processing MIMO MIMO/CA(Big Pict. Download scientific diagram | LTE frame structure used with FDD from publication: Experimental investigation on target detection and tracking in passive radar using long-term evolution signal. The skeleton is on example of a frame structure. em. LTE or 5G NR, operating in the same frequency range and within the same area have to be synchronised. In LTE-Like structure, the reference signal is distribute over both time and frequency domain. Some parameters do not apply to the Basic LTE PRACH and Basic LTE-A PRACH. A typical LTE frame is 10 ms (milliseconds) long. Frame Structure Downlink Uplink Reference Signal. Source: 3GPP TS 36. 1. 10 mili second radio frame consists of Downlink subframe, Uplink subframe and Special subframe. TDD have a special sub frame (1,6) when downlink-to. link 2 link 3 lte part of the…The LTE TDD frame structure is Type 2. Base stations need to. One sub frame is composed of 7 normal time slots used for downlink/uplink and 3 special time slots. For FDD, whether downlink and uplinkRadio Frame Structure. 2. Last but not least, we provide an overview. Type 1 radio frame has a duration 10 ms and consists of equally sized 20 slots each of 0. Downlink modulation types: QPSK, 16-QAM, and 64-QAMthe LTE communication protocol. The LTE standard uses Orthogonal Frequency Division Multiplexing (OFDM) modulation to achieve robust transmission in multipath scenarios (Liu et al. If you can interpret these tables into a correct graphical format, you already understand all the details of Uplink frame structure. 4G - LTE FRAME STRUCTURE |FRAME , SUBFRAME, SLOT, RE | MJTECHSTAR#MJTECHSTARIf the spatial domain is also considered the resource allocation structure actually becomes a 3-dimensional arrangment. • LTE Advanced supports CA with up to five 20 MHz carriers for a total of 100 MHz operating bandwidth. This is achieved by first identifying the frame start time. Downlink Waveform = OFDMA (There is a subtle differences in waveform generation formula, but almost same) Followings are some of parameters that are different from legacy LTE. LTE (telecommunication) In telecommunications, long-term evolution ( LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM / EDGE and UMTS / HSPA standards. 5ms [9]. The slots are divided into symbols – each slot has either 6 or 7 symbols. In the time domain, one LTE frame has a 10 ms period and consists of 20 slots of 0. 75 times more bandwidth. When a UE receives the LTE signal, it must first convert the signal into the frame structure to be able to extract the transmitted information. Inter Cell interference Coordination (ICIC) : In LTE, Frequency Reuse Factor equals to one (full spectrum availability at each Cell) This leads to high performance degradation specially the Users in cell edge. com LTE Frame structure. LTE FDD uses 10ms frames, divided into 20 sub-frames or slots (of 0. For example, the public network has more downlinks, and the private network or private network has more uplinks. The LTE half-frames are further split into five sub frames, each 1ms long. 5 ms. This new frame structure is designed to make LTE signal similar to WLAN burst. Frame Structure Type 1. One element that is shared by the LTE Downlink and Uplink is the generic frame structure. LTE tutorial- This tutorial on LTE covers LTE system overview, LTE air interface,LTE SAE and provide link for LTE Frame structure, LTE physical layer,LTE protocol stack,LTE terminologies,LTE advanced,LTE vendors etc. Time z) Subcarrier (15 kHz) Symbol | 19 LTE-V2X PHY-layer Structure A 10 MHz channel comprises 50 RBs (20 MHz →100 RBs) Divided into several equal-size subchannels Each subchannel divided into control and. Special Subframes Radio Frame Length = 10 ms. LTE frames are 10 msec in duration. These are; - Type 1 FDD (Frequency Division Duplexing) - Type 2 TDD (Time Division Duplexing) Type 1: It is designed for frequency division duplex, and is valid for both half duplex, and full. between LTE and NR, then point out the limitations in supporting sharing over SL, and possible solutions in 3GPP standard efforts. The PSS signal is the same for any given. LTE Radio Physical Layer Sadayuki Abeta NTT DOCOMO. It consists of a 10 ms radio frame divided into 20 slots, numbered 0 to 19, each with a duration of 0. 4Time Division Duplex (TDD) In TDD, isolated cell clusters at higher frequencies can be used, where path loss reduces inter-cell interference. Channel Mapping and UE Categories. It introduces several changes in terms of frame structure and slot formats compared to previous generations like 4G LTE. between the air interface—transmitted frames on the air—and the actual service data unit (SDU) packets that are coming from the top of the protocol stack. Because of variable subcarrier spacing, the. 5. In the time domain, LTE transmissions are organized into radio frames with a length of 10 ms, each radio frame is divided into ten equal 1 ms subframes. The difference lies in the LTE frame structure in both the FDD and TDD versions of the LTE. 5G “frame” has a duration of 10ms, that consist of 10 “sub frames” having 1 ms duration, similar to that of 4G/LTE. · It consists in a category of Frame 2. However, unlike LTE-U, LAA use a special physical layer frame structure called Frame Structure Type 3 which didn't exisit before. Learn the basics behind 5G NR waveforms, frame structure, and numerology. The 10 ms frame comprises two half frames, each 5 ms long. m1” (see appendix 2). As mentioned as per topologies, TDD and FDD there are two frame structures viz. 5ms. 25 MHz to 20 MHz. 3. 1 Protocol structure over S1 13 6. Time Domain Correlation. . When you study the physical frame structure of LTE, you may be impressed by flexibility (meaning complexity in other way) of all the possible ways of resource allocation. Figure 1 shows frame structure type 1, which can be used in either full-duplex or half-duplex FDD mode. OFDM with a cyclic prefix is the basic modulation scheme selected to combat severe frequency-selective multipath fading. A TDD frame structure is shown in below figure. 7 33. 11 devices. 12. Uplink Frame Structure of LTE-NB can be summarized in the following three tables. 4G/LTE - Reference Signal. 4G/LTE - PHY Channel PSS (Primary Synchronization Channel) PSS is a specific physical layer signal that is used for radio frame synchronization. ICIC reduce ICI at cell edge applying certain restrictions on resource assignment. FDD is operated in the paired spectrum (see Sect. 3 Frame and slot structure 174 8. Type 1, applicable to FDD- Here there are. 5G NR: Numerologies and Frame structure Supported Transmission Numerologies - A numerology is defined by sub-carrier spacing and Cyclic-Prefix overhead. LTE Frame structure in muted MBSFN subframe based DSS. 75 KHz Subcarrier Spacing. Design verification. crostrip line with a 0. In LTE, the subframe number and OFDM symbol number within the subframe is always same in any cases). Resource Block of RACH in LTE Frame Structure : Preamble length is 6RB , 1 RB=180KHZ, so 6RB=1. When an LTE system in one country is within the footprint of a satellite service owned by another country, to prevent the interference from the satellite services, the LTE system will avoid using the overlapped frequency bands. Uplink Frame Structure of LTE-NB can be summarized in the following three tables. Figure 1. I think if we note to general sub-carrier in distinct LTE Bandwidth we are able to identified the answer. Radio frames and subframes are of fixed lengths. 27/06/2023 0. It describes NB-IoT Frame Structure with 15 KHz Subcarrier spacing and 3. Like LTE-U, this is a kind of technology to transmit LTE signal in unlicensed frequency range. Rrc Parameters. So, the standards of wireless communication are taking aThe Fig 1: Shows the position of RACH in the Uplink LTE channel Structure. It uses a 20 MHz channel with 2048 subcarriers. The design considera-tions are explained below. The LTE physical layer supports two types of frame structures as types 1 and 2. Suresh Sahni. Technical Overview of 3GPP LTE| Hyung G. Define Frame Structure? Q02. It does not show any structure in frequency domain. Each hyperframe consists of 1024 frames. Frame Structure The following figure shows the frame structure of an LTE signal (FDD). 5 ms. As shown in the figure below, an LTE TDD frame is made of total 20 slots, each of 0. In TDD, one single frequency will be. One subcarrier has bandwidth of 15 kHz. 5MHz (6 RBs in frequency per frame) to 20MHz (100 RBs in frequency per frame), being 10MHz the most commonly deployed. Learn the basics behind 5G NR waveforms, frame structure, and numerology. 0 (2019-02): a. 2. 5G NR Supports two frequency ranges FR1 (Sub 6GHz) and FR2 (millimeter wave range, 24. Type 1 is used as LTE FDD frame structure. In telecommunications, long-term evolution ( LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM / EDGE and UMTS / HSPA standards. Figure 3 shows the frame structure for LTE in FDD mode (Frame Structure Type 1). Note: there are much more content (other technologies), find out there:. (ii) Type 2: supports TDD mode. Frame Structure Type 1. Choose a configuration with more “D”s in the frame means greater proportion of Downlink Data (normal for most Internet /ISP applications) Tables defining Uplink Frame Structure; Frame Structure/Resource Grid; RU (Resource Unit) Tables defining Uplink Frame Structure . Calculation: 1 Subcarrier of PRACH preamble =1. 10 subframes (= 20 slots) are fit into 10 ms in LTE while various number of slots depending on Numerology are fit into 10 ms in 5G NR. The second component enables shorter transmission durations (Figure 2), which is a more radical change of the LTE frame structure. Modulation: OFDM with QPSK, 16 QAM, 64 QAM 10. Type 2: Used in LTE TDD. LTE TDD Overview. Total 17 frames are used for carrying information data and 1 frame (i. Although choosing a 5G NR compatible frame format may. LTE: Key Features 2. from publication: Analytical Link Performance Evaluation of LTE Downlink with Carrier Frequency Offset | In this paper, we evaluate the link. A non-exhaustive list of. – Frame structure type 1 (FS1): FDD. In LTE, DL and UL transmissions are organized into radio frames of 10 ms each. The structure of the HDL LTE MIMO Transmitter subsystem is shown below. Each subframe consists of two slots. Additionally, NR supports transmission based on mini-slot (a fraction of a. Type 2 LTE Frame Structure. 5 milliseconds. Expected in the 2008 time frame, LTE is a 3GPP standard that provides for an uplink speed of up to 50 megabits per second (Mbps) and a downlink speed of up to 100 Mbps. This is the same as in LTE, facilitating NR and LTE coexistence. The 10 ms frame comprises two half frames, each 5 ms long. 2. 0 (2007-06): Physical Channels and Modulation. For the examples of TDD resource grids for each Subframe DL/UL Configuration and Special Subframe Configuration, see Frame Structure Frame Type 2 Overview section. 5G, the fifth generation of wireless technology, employs a new radio access. Uplink physical channels carries layer 2 information but uplink physical signals are only used by the physical layer. 1. If the PDCCH is for a specific UE, the CRC will be masked with a UE unique identifier, for example a Cell. Network Components for MBSFN(eMBMS) For implementing eMBMS, a couple of components are added in the core network side as shown below. 211 frame structure type 2 (DL / UL / SSF) Correct choice of Configuration value is essential when setting the UL/DL ratio for CableFree LTE networks using TDD bands. The elementaryblock ofanLTE frameis a com-plex symbol, defined as a resource element (RE). 0 MHz, 10 MHz, 15 MHz, and 20 MHz. Figure 1 LTE Frame structure . Bandwidth vs RBs • LTE physical layer supports any bandwidthTime Domain transmission pattern of SS Block in NR is more complicated than LTE SS Block (Actually LTE has only one pattern of SSB Transmission in Time Domain as shown in LTE Frame Structure. The fre-quency index of an RE maps to an LTE subcarrier, and its time index maps to an LTE symbol. The 51-frame Control Channel Multiframe in GSM. • Transmitted on 6th symbol of slot 0 and slot10 of each radio frame on 72 subcarriers centered. Full size image. As illustrated below, there can be two major types suggested. Uplink3. OFDM with a cyclic prefix is the basic modulation scheme selected to combat severe frequency-selective multipath fading. Type 1, applicable to FDD- Here there are. High bandwidth and low latency are key selling points of 5G, and ones that businesses have been eager to adopt. 2) Frame Structure The 5G frame structure is conceptually like LTE, but it is more flexible to accommodate the different requirements for high-speed and low-latency operation. Demodulating an LTE Signal in MATLAB with LTE System Toolbox. 55ns. INHA UNIVERSITY. No of Slots per Sub frame =2. 8MHZ. The frame structure for the type 2 frames used on LTE TDD is somewhat different. Each radio frame consists of two identical 5 ms half-frames. LTE. INHA UNIVERSITY Contents 1. The Fig 1: Shows the position of RACH in the Uplink LTE channel Structure. Alternative PDSCH DM-RS pattern when LTE CRS rate matching is configured; 7. Download scientific diagram | LTE frame structure in FDD mode: 7 OFDM symbols with normal CP [7]. The frame structure for the type 2 frames used on LTE TDD is somewhat different. It was combination of Time Domain, Frequency Domain and the modulation scheme. 10 mili second radio frame consists of Downlink subframe, Uplink subframe and Special subframe. It does not show any structure in frequency domain. Long Term Evolution (LTE) is the latest buzzword on everyone’s lips, but are you as conversant with the LTE architecture as you would like to be, or — more importantly —. In order to make use of the overlapped LTE bands, a Downlink Only Frame Structure (DOFS) approach is proposed in this. 1. 5ms duration. LTE Frame Structure and Resource Block Architecture . · Radio frame size= 10 ms. Type-1 LTE Frequency Division Duplex (FDD) mode systems: Type-1 frame structure works on both half duplex and full duplex FDD modes. The slot is of 0. Demodulating an LTE Signal in MATLAB with LTE System Toolbox. There. Special Slot Usage LTE Frame Structure Type2 . There are three types of Frame Structure : Type 1 for FDD, Type 2 for TDD, Type 3 for LAA. 2. Choose a configuration with more “D”s in the frame means greater proportion of Downlink Data (normal for most Internet /ISP applications). The frame structure below ( Figure 1) is applicable to TDD. Sub frame duration=1 ms. One GSM hyperframe composed of 2048 superframes. LTE standard supports multiple bandwidth (BW) configurations, from 1. Scheduling of UL resources is necessary depending on the amount of data to be transmitted by UL. Number of. The Evolved UMTS Terrestrial Radio Access Network (E-UTRAN). 72 (=0. A frame has 10 subframes having 1ms duration each. Total Frame duration is about 10ms. The LTE physical layer supports two types of frame structures as types 1 and 2. 5 ms each). When data is. I would just put down a high level descriptions of the difference here. LTE frames are 10 msec in duration. Frame Structure Type2 Configuration . Initial Cell Search and Cell Selection. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. The word number (W) in a base frame is same but the byte. (I created following subframe structure using LTE Resource Grid and edited to fit the topics of this page)A frame has a duration of 10 ms and consists of 10 subframes. 2) Each subframe has two slots of 0. 1. There are two types of frames in LTE;FDD and TDD. Time z) Subcarrier (15 kHz) Symbol | 19 LTE-V2X PHY-layer Structure A 10 MHz channel comprises 50 RBs (20 MHz →100 RBs) Divided into several equal-size subchannels Each subchannel divided into control and. 211 frame structure type 2 (DL / UL / SSF) Correct choice of Configuration value is essential when setting the UL/DL ratio for CableFree. We show that this fixed TTI duration is extremely inefficient whenLTE FRAME STRUCTURE Bikas Singh 5y 5G NR Terminologies – Subcarrier Spacing, Fram-Subframe, Slot and Symbol K. Three different types of physical channels are defined for theFigures 1 and 2 show the frame structures referenced in Table 1 . – Frame structure type 1 (FS1): FDD. The PDCCH is used for control information while the PDSCH carries the actual data. D = downlink sub-frame; U = uplink sub-frame; S = special sub-frame. So if the system. As shown one hyperframe cycle consists of 1024 hyperframes. Now (as of Sep 2017) 3GPP official specification (38. < 25. A new LTE frame type (i. · Time slot size= 0. To configure the downlink signal in this slot pattern, two separate DL-SCHs will be needed to represent two different channel. 2. 1-1: Mapping between cell-identity group and the indices m0 and. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. 104: “Evolved Universal Terrestrial. System Information Blocks are grouped in SI containers. A table will be displayed. The components of the LTE network. 2. Type 2 LTE frame structure. Type 1 LTE Frame Structure. The figure below shows the structure of the downlink physical channel and downlink physical signals. dl-UL-TransmissionPeriodicity: Periodicity of the DL-UL pattern. On-Demand Demo. Working on two industry-level projects will give you hands-on practice in customising LTE-Sim(an open. Each SI is composed of multiple SIBs. Here are some important parameters and downlink modulation techniques used in LTE: 1. Timing Advance in LTE . The LTE frame structure for the FDD and TDD schemes was discussed in Chapter 9. Three different types of physical channels are defined for theRadio Frame Structure for LTE. Figure 4shows the structure of a subframe. - available for PMCH (Physical Multicast Channel) LTE Resource Grid. Type 1: FDD : Frequency Division Duplex. 5 ms. ms each) while each sub-frame is further divided into 2 slots (0. LTE is mainly designed for high speed data applications both in the uplink and downlink. The 51-frame structure occurs in several forms, depending on the type of control channel and the network provider’s requirements. The underlying data carrier for an LTE frame is the resource element (RE). Frame Structure - Candidates before 3GPP . Normally the time domain fields are represented in terms of Ts, which is defined as Ts=1/ (15000×2048) seconds or about 32. The downlink and uplink frame structure parameters are the same, except that the time-domain underlying symbols in the downlink are OFDM symbols, whereas in the uplink the underlying symbols are SC-FDMA symbols due to the use of different multiple access methods in. Performance analysis of OFDMA in LTE. OVERVIEW The design of the LTE physical layer (PHY) is heavily influenced by the requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency, and multiple channel bandwidths (1. A total of 504 unique physical layer cell identities are provided. Signal analysis. LTE Frame Structure 5. 5G frame structures provide a fixed overall structure for defining data block transmission timing. design, LTE frame structure dedicated some channels for data and they are called data channels while others for control information, known as control channels. Each radio frame is divided into 10 subframes (each being 1ms long). The HI all,Please go through video of LTE Frame Structure (FDD and TDD). Type 1 lasts 10 ms equivalent to 10 subframes. Each radio frame will have a total of ten subframes, each with two time slots. This site is for everything on 4G/LTE. Slot duration=0. As mentioned in Overview page, one of the critical differences in terms of waveform design between 5G Pretrial and current LTE is that in 5G Pre Trial the subcarrier spacing is 75 Khz as opposed to 15 Khz in current LTE. OFDMA Downlink. A typical LTE frame is 10 ms (milliseconds) long. The downlink and uplink frame structure parameters are the same, except that the time-domain underlying symbols in the downlink are OFDM symbols, whereas in the uplink the underlying symbols are SC-FDMA symbols due to the use of different multiple access methods in. Yes it brought multiple options in sub-carrier. Each frame is divided into ten equally sized subframes. keysight. 5 ms each). Frame Duration: The duration of an LTE frame is fixed at 10 milliseconds (ms). Particular attention is given to LTE’s use of multiple antenna techniques and to the modulation scheme called single carrier frequency division multiple access (SCFDMA). LTE has radio frame of duration 10ms consisting of 10 subframes. Each slot occupies either 7 symbols (for normal CP) and 6 symbols (for. The minimum unit being frame (or TDMA frame) is made of 8 time slots. This provides several benefits, including:“10ms” version, and gives greater opportunity for uplink/downlink flexibility. This page introduces several candiates for 5G Frame Structure before 3GPP finalize the specification. Frame structure type2 is applicable only to TDD and is provided for compatibility with legacy UTRA TDD systems. The biggest difference of any new wireless communication technology starts from physical layer frame structure. The number of symbols per. LTE supports two radio frame structures [15]: 1. LTE system basic parameters and LTE Frame structure: Frame Size=10ms No. 5 ms. ‘Stand-alone operation’ utilizing for example the spectrum currently being used by GERAN systems as a replacement of one or more GSM carriers. The duplex method and frame structure selected for the NR deployment will influence the integrity KPI performance values that can be achieved in the network. • LTE interoperates with CDMA2000, W-CDMA and GSM systems. The PRACH transmission is based on the access frame structure. . 5ms duration. 3 Mode of Operation : 1. Spectrum utilization efficiency of LTE and NR bands with and without cross-band DSS. Answer-1:The difference lies in the LTE frame structure in both the FDD and TDD versions of the LTE. Alternative frame structures are defined for use with TDD. LTE tutorial videos, articles, and code examples introduce key LTE concepts and effective techniques and workflows for LTE physical layer development including: Waveform generation. OFDMA downlink, Single Carrier Frequency Division Multiple Access (SC-FDMA) uplink 11. 2. Like LTE-U, this is a kind of technology to transmit LTE signal in unlicensed frequency range. Type 1: Used in LTE FDD. (As you know, one sample (Ts) is 1/30. Hence each subframe has 2 slots. A. The SSS has 168 cell ID groups that are generated from cyclic shifts of sequences and .