Frame structure type 2 is applicable to TDD. Slot configuration via RRC consists of two parts. NOTE: * E-UTRA TDD UE will have a relatively lower Noise Figure since it does not have a duplexer. The type 1 structure (Fig. 11, the total one-way processing time is 2. The figure depicts carrier aggregation used in LTE TDD mode frame. LTE/LTE-Advanced FDD/TDD frame structures [3]. 1ms) where as slot length varies based on subcarrier spacing and number of slots per subframe. One such specific consideration is for TDD operation where the existing TDD frame structure in LTE up to Release 14 was based on downlink subframes, uplink subframes and special subframes. 15. 10 ms radio frame, 1 ms sub frame. PMP frame to this LTE frame, the downlink start has to align to the beginning of subframe 4, not subframe 0. LTE frame structures used for TDD 36. Frame structure in LTE-TDD systems. 211). Frame Structure Candidates . For LTE TDD, the frame configuration 2 is the most widely used frame structure, i. In each subframe, there are two switching. Cyclic Prefix at beginning, remaining part is real symbol data. 00 - View presentation slides online. The 5G NR frame structure is defined by the 3GPP and here we present details of the NR Frame Structure that is specified in 3GPP specification (38. In contrast to mainstream commercial LTE software packages, the developed package is specifically tailored to accurately model mission critical IoT applications and above all fully conforms to commercial 4G LTE signaling and QoS standards. 1 and 10. 5 ms repetition period. Time/frequency frame structure and definition of sidelink resource pool for NR V2X TDD. 0 Table 4. Each radio frame of length Tf = 307200*Ts = 10 ms consists of two half-frames of length Tf = 153600*Ts = 5 ms each. keysight. 1 Reasonable illuminator. 4. For FDD, whether downlink and uplink TDD. 4G/LTE - RACH. 2 DSUDDDSUDD (10ms duration), where different special subframe “S” configurations are possible such 1 The LTE frame is formed of 10 subframes (SF) of duration 1 ms each and sub-divided into 14 OFDM symbols. EP3416330A1 EP18185302. 5 GHz 5G band, or C-band 5G, is the most commonly tested and deployed 5G frequency. LTE TDD frame structure type 2. The concept would be similar to legacy LTE TDD Subframe configuration, but main differences from LTE TDD subframe configuration are. In TD-SCDMA a super-frame of 720 ms duration is made of 72 radio frames of 10 ms duration each. Myung 16 3GPP LTE. The numerology in 5G is used to define these parameters, and includes the su LTE TDD frame 36. FDD and TDD LTE networks have been deployed on all continents. frame structure optimization indicated higher. Length of one slot is fixed. Carrier Aggregation in TDD. 1 frame은 10 개의 subframe으로 구성되고. URLLC within a carrier should be supported , and TDD with flexible UL / DL ratio is desirable . k) that the frame structures given in Annex 1, Frame A and Frame B can be implemented for NR(New Radio) systems; l) that the Frame B2 given in Annex 1 is compatible with the LTE-TDD frame structure configuration n o. References. FIG. LTE-TDD) network, IMT-2020 networks operate with new frequency band, wider operating bandwidth, active antenna system (AAS) and higher UE transmit. The stack consists of different layers viz. 9, 1. Thus, by properly configuring the timeslots, interference between TD-SCDMA and LTE TDD can be. lets take few example to understand frame structure in more details . 10 such subframes form one radio frame. 21). 5 ms. Conformance Test Setup. . Hierarchy of Frame Structure : Frame (Radio. 4 LTE Frame Structure The figure below shows the frame structure for LTE under Time division mode (TDD) Type 2 and Frequency Division mode (FDD) Type 1. 2. 3rd frame is always used for Uplink transmissionLTE-TDD Frame Structures. Each frame is then divided into ten subframes of 1-millisecond duration. Very Basic understanding of Frame , subframe , slots and. The analysis sought to identify and quantify the similarities and differences within the overarching LTE specification documents as they pertain to the implementation require-. 5ms each). The LTE frame structure for the FDD and TDD schemes was discussed in Chapter 9. Figure 7A illustrates a CA frame structure 700 for a TDD-TDD carrier aggregated PUSCH-less cell arrangement for data transmission between a UE 115 and BS 105 according to some. In the TDD duplexing mode, a single bandwidth is shared between uplink and downlink, with the sharing being performed by. LTE TDD Frame Configuration These first three groups of settings apply to all basic carriers. 3GPP defined seven frame structures for LTE-TDD, where only a limited number of configurations allocate more transmission time to the DL than the UL and have a 5 ms periodicity, which is necessary for compatibility with NR for quicker response. Can schedule 1 DL and multiple UL sub-frame at a time. Refer to Numerology page for further details. FDD has a Type1 frame structure and TDD has a Type 2 frame structure. The remaining six symbols have a cyclic prefix of length TCP = 144 ⋅ Ts ≈ 4. Choose a configuration with more “D”s in the frame means greater proportion of Downlink Data (normal for most Internet /ISP applications) OneAdvisor Realtime Spectrum – LTE-FDD LTE-TDD Frame Structure LTE-TDD Structure LTE-TDD transmission is done in 10ms frames containing 10 sub-frames of 1ms and 20 slots of 0. Therefore, the accuracy. The 10 ms frame comprises two half frames, each 5 ms long. 211. 4) is applied to Time Division Duplex (TDD) mode maintaining only full duplex operation. Half frames are further divided into 4 subframes and one special subframe, based on the downlink-to-uplink switch point periodicity. 5 ms 1 radio frame = 10 subframes = 20 slots. This video looks at OFDM waveforms, and the different subcarrier spacings supported in 5G NR. 15. Choose a configuration with more “D”s in the frame means greater proportion of Downlink Data (normal for most Internet /ISP applications). 4. In LTE base station is referred as eNodeB and mobile subscriber is referred as UE. Switching Points. frame structure optimization indicated higher. 8. The WiMAX frame adopts a subframe ratio structure of 29:18, the LTE TDD frame adopts a subframe ratio structure of subframe configuration 1, and an UpPTS time slot and a last uplink symbol of a last uplink subframe which are in the LTE TDD frame. Differences between LTE-FDD and LTE-TDD. 2. MHz spectrum, we have to use this 20 MHz bandwidth for both DL and UL. The radio frame of 10 ms are transmitted continuously as per TDD topology one after the other. In frame structure Type 1, each 10 ms radio frame is divided into 10 equally sized subframes. Nzc is determined by the following table. Just take a look at the overall uplink slot structure. There are seven possible configurations for LTE TDD frame as shown below. There are three types of Frame Structure : Type 1 for FDD, Type 2 for TDD, Type 3 for LAA. g. LTE supports a number of uplink-downlink configurations for TDD. In addition to the TDD frame structure, other channels require extra resources in-band with the TDD resources assigned for data channels. TDD frame structure. 89 Figure 6. LTE Physical Layer 2 radio frames are supported: 1. This section only discusses how to. Each frame is divided into ten equally sized subframes. In this paper, we study the frame structure design for low latency communications in 5G TDD systems. OFDMA Downlink. Flexible Bandwidth: 1. package to model commercial 4G LTE systems is developed. 2 TDD Configurations The goal of the CBRS Alliance is to allow flexible use of CBRS band if coexistence of multiple deployments is preserved. In case of co-site deployment, slot- and frame structures may be aligned to simplify cell search and inter. Two duplex schemes FDD and TDD are supported. 4. 4. The solution encompasses flexible multiplexing of users on a shared channel with dynamic. You might have experience how much complicated (confusing) it become about HARQ process in LTE in TDD mode. The LTE-TDD frame structure can be adjusted to have either 5ms or 10ms DL-UL switch point periodically. In other embodiments, the first and second radio frames are two different ones that fall within the same downlink/uplink configuration period. The radio frame is represented in the LTE Toolbox™ product by the use of a succession of 10 cell-wide settings structures with the NSubframe field set from 0 through 9 in each. Increasing frame configuration; Configuration: 3GPP release: Downlink to uplink switch point periodicity (ms) Subframe number: Number of subframes / frame: 0: 1: 2: 3: 4: 5: 6: 7: 8: 9: D [DL] U [UL] S. There has been long long discussions on frame structure both in academia and in 3GPP and now we have pretty clear agreements on what a NR(5G) radio frame would look like. 2 LTE Frame Structure The frame structure is dependent on the duplex scheme applied in the spectrum. Other limitations, such as pseudo-congestion and lack. Type 1 LTE Frame Structure. 5 ms each in the time domain. Instead, we can define the pattern in much more flexible way using several parameters as shown below. 7 μs. In the special slot, symbols allocated for downlink, gap and uplink are 10:2:2 respectively. Type 2: TDD : Time Division Duplex. 10 mili second radio frame consists of Downlink subframe, Uplink subframe and Special subframe. FDD sTTI: New features in Rel. . 2. · Each Radio frame consists two half frames. when μ = 0. Lte Frame Structure :TDD and FDD. Refer LTE stack >>. Example with 2 subchannels of 10 RBs each, using TDD pattern of [D D D F U U U U U U] and sidelink bitmap of. 6 bps/Hz for LTE-A 2×2 to 7 bps/Hz for 5G NR 64TRX. LTE physical layer tutorials. 2 LTE Frame Structure The frame structure is dependent on the duplex scheme applied in the spectrum. • The figure-3 depicts UMTS TDD frame structure. The basic type 1. The slot is of 0. Depending on configuration, they can concatenate multiple DL subframe and add only one UL control in the last subframe. Can. FDD LTE uses a paired spectrum, while TDD LTE uses an unpaired spectrum. The frame structure in this case is tailored to the LTE Physical. There are seven possible configurations for LTE TDD frame as shown below. During this time period equivalent to RTG gap, both BS and SS do not transmit any data. This video then walks you through the concept of carriers and. Figure 6. The frame structure is different for FDD and TDD topologies. Use the LTE Toolbox™ to create a frame worth of data, pass it through a fading channel and perform channel estimation and equalization. 8A CN201580008676A CN105993137A CN 105993137 A CN105993137 A CN 105993137A CN 201580008676 A CN201580008676 A CN 201580008676A CN 105993137 A CN105993137 A CN 105993137A Authority CN China Prior art keywords frame flexible sub index sub radio frames Prior art date 2014-02-13. Hi All,There are lot of new member joined so i am providing the links of ORAN videos whi. Key to many 5G features is the fact that the subcarrier spacing in 5G NR can take not just one value, 15 kilohertz in LTE, but powers of 2 multiples of 15 kilohertz up to 240 kilohertz as shown on the first line. LTE Frame Structure. When operating in TDD mode, we have to clearly define on exactly when to expect the transmission and when to expect the reception. Myung 17 Frame Structure • Two radio frame structures defined. Frame Structure, Bandwidth Mode, CP Mode, and Physical Resource Grid. The Fading parameters are available for Advanced LTE and Advanced LTE-A TDD. The NG-RAN includes new generation LTE eNodeB (ng-eNB) and 5G NodeB (gNB), which are responsible for the radio functions, e. A. 2. Very Basic understanding of Frame , subframe , slots and OFDM symbols1. TDD have a special sub frame (1,6) when downlink-to. Uplink and downlink configurations are used to create subframes (0 to 6). There are two topologies used in LTE system viz. A. LTE의 Frame 구조는 FDD와 TDD로 나누어 규격에 정리되어 있다. TDD systems has led to a few additional physical layer features exclusive to TDD mode [7]. Type 1 uses Frequency Division Duplexing (uplink and downlink separated by frequency), and TDD uses Time Division Duplexing (uplink and downlink separated in time). In LTE, we don't need any specific terminology to indicate the subcarrier spacing since there is only one subcarrier spacing, but in NR there are several different types of subcarrier spacing . OneAdvisor Realtime Spectrum – LTE-FDD LTE-TDD Frame Structure LTE-TDD Structure LTE-TDD transmission is done in 10ms frames containing 10 sub-frames of 1ms and 20 slots of 0. The support for both TDD, half and full-duplex FDD is handled by two very similar frame structures: frame structure type 1 for half and full-duplex FDD and frame structure type 2 for TDD. We focus on the mandatory parts of the standard for both the BS and the MS, i. A 5G frame structure designed for efficient support of users with highly diverse service requirements is proposed. Frame structure Type 3N builds on the 3GPP frame structure with the addition of the new nframe concept. The LTE FDD uses a Type-1 frame structure whereas the LTE TDD uses a Type-2 frame structure. The LTE half-frames are further. Furthermore, it provides the mobile community’s views on the preferred frame structure for initial 5G launches in 3. At the initial phase of LTE develoyment, you haven't doubt on that every LTE subframe would carries CRS(Cell Sepecific Reference Signal) in it. PCFICH (Physical Control Format Indicator Channel) PHICH (Physical Hybrid ARQ (Automatic Repeat reQuest) Indicator Channel) PDCCH (Physical Downlink Control Channel) Available for PDSCH (Physical Downlink Shared Channel) TDD guard period in special subframe. Frame Structure Type 1. 9A EP18185302A EP3416330A1 EP 3416330 A1 EP3416330 A1 EP 3416330A1 EP 18185302 A EP18185302 A EP 18185302A EP 3416330 A1 EP3416330 A1 EP 3416330A1 AuthorityIn another embodiment, the first radio frame and the second radio frame are two different frames belonging to the same downlink / uplink configuration period. In 5G/NR, we don't have any predefined pattern. Frame. You might have experience how much complicated (confusing) it become about HARQ process in LTE in TDD mode. Like LTE-U, this is a kind of technology to transmit LTE signal in unlicensed frequency range. What is claimed is: 1. Frame structure type 2(for 5ms switch-point periodicity) Figure 22. Type 1 lasts 10 ms equivalent to 10 subframes. Figure€E. There are two types of frame structure in the LTE standard, Type 1 and Type 2. 5G opens up new spectrum by the introduction of Sub-6GHz and mmWave, which can also be deployed as non-standalone with LTE, thus, creating new challenges for carriers to deliver a ubiquitous user experience,LTE, LTE Advanced, Gigabit LTE 2020s Wireless Edge 5G New Radio (NR) 3 Delivering on the 5G vision. Frame Structure Type1. 1. 4 shows a frame structure 400 for a Time Division Duplex Long Term Evolution (LTE TDD) carrier. One way to avoid cross-link interference is to ensure that all base stations are either transmitting simultaneously or receiving simultaneously. The n78 band’s popularity is due to its relatively common availability, compared to lower cellular spectrum (below 2700MHz) already widely in use by 3G and 4G networks. Each. · Each Radio frame consists two half frames. Fig. In Extended CP, number of symbols within a slot is decreased. The radio frame is represented in the LTE Toolbox™ product by the use of a succession of 10 cell-wide settings structures with the NSubframe field set from 0 through 9 in each case. (Preamble format 4 is used only in TDD LTE. . Subframes 1 and 6 are special subframes that serve as a switching point between DL and UL transmission. The frame structures for LTE differ between the Time Division Duplex, TDD and the Frequency Division Duplex, FDD modes as there are different requirements on segregating the transmitted data. Each subframe has two slots. This is where the TDD and FDD variants of LTE use a slightly different approach. Hence there are total 20 slots in a radio frame. Two types of CP – Normal Cyclic Prefix Extended Cyclic Prefix. Refer LTE Frame >>. In LTE, DL and UL transmissions are organized into radio frames of 10 ms each. 1. 8. 1), where the downlink and uplink transmissions are per-formed in different carrier frequencies. 6 Conclusion. This ingenious method enables full-duplex (simultaneous) communication over a half-duplex (serial-binary) link. 10 ms radio frame, 1 ms sub frame. 1 shows an example of such TDD configuration structure in LTE with T= 10 [2]. Type 2: used for the LTE TDD systems. The TDD guard period must be long enough for the farthest NB of which the signal still could be seen. • A radio frame has duration of 10 ms. Some parameters do not apply to the Basic LTE PRACH and Basic LTE-A PRACH. 2. We have investigated the suitable IO before designing the radar system. 0, and 1. In the special slot, symbols allocated for downlink, gap and uplink are 10:2:2 respectively. Marriage of single carrier transmission and FDMA;NB-IoT-U introduces frame structure Type 3N. Figures 10. 7µs. A nframe spans N Frame = 2, 4, or 8 radio frames. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. So, it is very important to understand the slot structure and other details about slot-based scheduling etc. Network and Protocol Architecture. Therefore, the accuracy. 4 frames are available only if the Radio Allocation Period is 4, 8, 16, or 32. Figure 1 shows frame structure type 1, which can be used in either full-duplex or half-duplex FDD mode. Then, 5G-NR is recommended to operate with a TDD DL/UL switching period of 5 ms with the pattern of “DDDDDDDSUU” and the DL/UL ratio of 8:2 to attain synchronization with LTE. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. LTE is designed primarily for full duplex operation in paired spectrum. The LTE TDD frame is transmitted after the starting time of the LTE TDD frame arrives. As shown in the figure below, an LTE TDD frame is made of total 20 slots, each of 0. A subframe comprises two slots, thus one radio frame has 10 sub‐frames. In this paper, we study the frame structure design for low latency communications in 5G TDD systems. 16e mobile wimax standard. As shown 5 ms periodicity frame have two “S” sub frame and 10 ms framesTD-SCDMA frame structure is shown in figure 2, which depicts frame hierarchy. BCH, CFI,. There is also basic information about how and why synchronisation can and should be achieved. In terms of DL/UL pattern frame B (DDDSUUDDDD) is equivalent to the frame DDDDDDDSUU with -2ms/+3ms time offset, which in turn is compatible with LTE frame structure configuration no. In an FDD scheme, all ten subframes within a radio frame contain either downlink or uplink subframes depending on the link. Type 1: used for the LTE FDD mode systems. 5 ms, T FA is the radio frame alignment which depends on various configurations of the TDD frame structure, and the TTI duration is 1 ms, hence, the user-plane latency of the TDD mode can be written as T USER-PLANE = 3. It is defined as 1/(15000 x 2048) seconds (=0. N TA,offset for a TDD uplink transmission is. TDD-LTE and FDD-LTE 3. One of the design principles of 5G NR has been the ability to coexist within the LTE physical layer structure to allow for sharing the existing 4G spectrum with new 5G devices. codes in LTE). From a network verification perspective, this means that for NSA NR deployments the performance of the 5G devices from an accessibility, retainability and mobility perspective will be closely aligned to and dependent upon the performance of the underlying LTE network. TDD LTE-A frame, presented in Figure 1, has been built on top of the LTE frame structure type 2 [8]. Second, we present a detailed characterization of the Star-link downlink signal structure in the 10. There are two types of LTE frame structure: 1. Application Framework TDD Signal Frame. This overview covers both LTE-Advanced FDD Type 1. 3GPP LTE Frame Structure 2, Applicable to TDD. FDD frame structure type is used. simplified LTE TDD frame structure and sug-gested keeping only one optimized frame struc-ture for LTE TDD mode. Frame structure type 1 is applicable to both full duplex and half duplex FDD. Radio frames and subframes are of fixed lengths. 331 v15. 2009-1-27 2 Outline • LTE requirement. 위의 그림이 FDD에 활용되는 Type1의 Frame 구조다. (for FDD and TDD) and DCI Formats 2B/2C for TDD alone. The radio frame is represented in the LTE Toolbox™ product by the use of a succession of 10 cell-wide settings structures with the NSubframe field set from 0 through 9 in each case. I claim: 1. In. Technical Overview of 3GPP LTE| Hyung G. Further each radio frame is divided into two sub frames each of 5ms. One of these feature is Uplink Data Compression, UDC. Figures 1 and 2 show the frame structures referenced in Table 1 . The LTE physical layer supports two types of frame structures as types 1 and 2. Root ZC sequence order for format 0-3. 2 Differences between FDD-LTE and TDD-LTE 3. 2. Signal ModelTime Division Duplex (TDD) accomplishes this using different time slots for uplink and downlink signals over the same frequency. The transmission timeline for the downlink and uplink may be partitioned into units of radio frames, and each radio frame may be partitioned into 10 subframes with indices of 0 through 9. 7 μs. 12 – Example of VBW setting for LTE-FDDand LTE-TDD to avoid underestimation. 3GPP LTE Frame Structure 1, Applicable to TDD and FDD Note (1) Note to Figure 1: (1) For more information, refer to 3GPP Technical Specification 36. The actual LTE (4G) is based on 3GPP Release 11. 6. LTE defines a basic unit of time: In the time domain, both uplink and downlink are organized. LTE Frame Structure Figure 1 describes the LTE frame structure for TDD mode [4]. 5), but will likely also apply forframe structure for OFDM systems . The frame structure below ( Figure 1) is applicable to TDD. em. Mandatory Guard Period in TDD Bands makes them highly inefficient if used in lower frequency configurationThe LTE TDD frame structure is Type 2. 3. FDD LTE is ideal for symmetric traffic, while TDD LTE is ideal for asymmetric traffic. 2 LTE-based passive radar and signal processing procedures 2. Numerology – Subcarrier Spacing. For the normal mode, the first symbol has a cyclic prefix of length TCP = 160 ⋅ Ts ≈ 5. from below figure you can see for μ = 0 (highlighted row) Number of OFDM symbols in one slot = 14. Few major differences in TDD Radio frame structure results in. PSS and SSS frame structure In 3GPP LTE systems, downlink and uplink transmissions are organized into radio frames with 10ms duration. 5 milliseconds. 10 ms radio frame, 1 ms sub frame. A method performed by a wireless device for determining a timing advance (TA) offset in a new radio (NR) network is described herein along with associated network devices and systems. frequency band (Band n78) to define common TDD frame structures at national level. 2. Fig. Type 2: used for the LTE TDD systems. However the system structure of LTE TDD is different from of that in LTE FDD. A method for performing communication using a time division duplex (TDD) frame by a user equipment (UE) in a wireless communication system, the method comprising: receiving a synchronization signal (SS) in one symbol of a first subframe of the TDD frame; and transmitting uplink control information through an uplink control zone. Here D-is downlink, S-for Sp e-cial sub frame and U - for Uplink. May 6, 2021 On-Demand Demo See a Celona 5G LAN in action and learn the basics Get Access This episode of Field Journal we’ll go deep into the TDD-LTE frame structure in the CBRS spectrum band, and touch on the different 4G LTE deployment methods that are used in different environments. This example shows how to create a frame containing the cell-specific reference signals (CellRS) in each subframe. The ECC Recommendation (15)01 [3], as amended on 14 February 2020, addresses, among other bands, the cross-border coordination of TDD MFCN in. 211 frame structure type 2 (DL / UL / SSF) Filter. 2. 7K views 2 years ago. In LTE, only 2 slots are available. But as we see more diverse types of subframe structure (FDD-frame structure Type1, TDD -frame structure Type 2, LAA - frame structure type 3), I see my confidence gets weaker. 5 ms); one slot consists of seven OFDM symbols. There are two types of LTE frame structure: Type 1: used for the LTE FDD mode systems. OneAdvisor Realtime Spectrum – LTE-FDD LTE-TDD Frame Structure LTE-TDD Structure LTE-TDD transmission is done in 10ms frames containing 10 sub-frames of 1ms and 20 slots of 0. URLLC within a carrier should be supported , and TDD with flexible UL / DL ratio is desirable . from publication: Robust Doubly-Differential Primary Synchronization Approach for 3GPP LTE Systems. Difference is that in LTE TDD, a half- frame of length 5ms has both uplink sub-frame and downlink sub-frame, a number of uplink sub-frames and downlink sub-frames is configured by the. The default parameters for national TDD synchronization should be defined before awarding the spectrum. Probably what I do as the first step is to describe each part of the map in a verbal form Overview-TDD : Frame Structure Type 2 < TDD LTE Frame Structure > 5/26 4/19/22, 2:11 PM ShareTechnote Followings are. – Frame structure type 2 (FS2): TDD. NB-IoT adopts the same frame structure as LTE, with 1024 hyper frames, consisting of 1024 frames that contain 10 subframes of two slots with a duration of 0. – Frame structure type 1 (FS1): FDD. It is valid for both half duplex, and full duplex FDD modes. · It consists in a category of Frame 2. channel coding. 5ms, each slot is composed of 7 symbols (normal cyclic prefix), therefore a resource block of 12 subcarriers by 7 symbols occupies one slot. 5 Mbit/s. in Figure 1. 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. In TDD, each slot can be flexibly configured into uplink and downlink symbols. This gap allows Base Station (BS) to switch from receive mode to transmit mode. The remaining six symbols have a cyclic prefix of length TCP = 144 ⋅ Ts ≈ 4. 가장 큰 차이점은 프레임 구조와 HARQ이다. 1. At least one of said second number of subframes is made to comprise at least three parts, as follows:. Two radio frame structures are supported; Type 1 and Type 2 are applicable to frequency division duplex (FDD) mode and TDD mode, respectively [2]. Root ZC sequence order for.