Abstract: Disclosed herein are a gateway-signaling method for Multiple-Input Single-Output (MISO) operation and an apparatus for the same. An apparatus for transmitting a broadcast signal according to an embodiment of the present invention includes a predistortion unit for performing predistortion for decorrelating signals corresponding to transmitters using the number of transmitters used for MISO and a transmitter coefficient index that are identified using a timing and management packet transmitted through a Studio-to-Transmitter Link (STL), thereby generating a pre-distorted signal; and an RF signal generation unit for generating an RF transmission signal using the pre-distorted signal corresponding to the transmitter coefficient index.

Abstract: Provided is a radio communication terminal which is capable of measuring quality in communication with a handover destination with high accuracy. The radio communication terminal is capable of communicating with a base station or a relay node, and includes: a receiver which receives control information including information relating to measurement of measuring quality of a neighbor cell; an extractor which extracts information on a subframe where the measurement should be performed, which is a subframe where only transmission of a signal from the relay node connected to the base station is performed, from the information relating to the measurement; a measurement section which performs the measurement, on a subframe basis, based on the extracted information on the subframe where the measurement should be performed; and a transmitter which transmits a result of the measurement to the base station or the relay node.

Abstract: This application discloses an information processing method. A communication device obtains an input sequence. The input sequence has a quantity B of bits. The communication devices transforms the input sequence into one or more code blocks. The communication device encodes each of the code blocks, to obtain one or more encoded code blocks. Each of the code blocks has a code block length less than or equal to a maximum code block length. Each of the code blocks includes a segment of the input sequence, one or more cyclic redundancy check (CRC) bits corresponding to the segment of the input sequence, and one or more filler bits. The encoded code blocks can meet various channel coding requirements.

Abstract: This application provides a control information transmission method, a base station, and a terminal. The method includes: extracting a radio resource from a preset resource block set, and sending control information in a first time period by using the radio resource. The base station includes a processor and a transmitter. The processor is configured to extract a radio resource from a preset resource block set, and the transmitter is configured to send control information in a first time period by using the radio resource. According to the control information transmission method provided in this application, the base station can send the control information in any time period, and the terminal can receive the control information in any time period, thereby shortening a time interval between two control information transmissions.

Abstract: Hybrid self-organizing networks. One example system includes a cellular network and a mobile satellite network. The cellular network includes a cellular base station configured to perform at least one cellular interference mitigation measure. The cellular network is configured to provide wireless communications in a first frequency band within a first deployed area. The mobile satellite network includes a mobile satellite network terminal configured to perform at least one satellite interference mitigation measure. The mobile satellite network is configured to provide wireless communications in the first frequency band within a second deployed area separated from the first deployed area by a first standoff distance. Performance of one or both of the at least one cellular interference mitigation measure and the at least one satellite interference mitigation measure results in a second standoff distance that is less than the first standoff distance.

Abstract: This application provides a DRX configuration method, a terminal device, a network device, and a communications system. The DRX configuration method includes: receiving, by a terminal device, N discontinuous reception DRX configurations sent by a network device, where the N DRX configurations respectively correspond to N groups of carriers; and when a DRX status of the terminal device is an active state, if M groups of carriers in the N groups of carriers are activated carriers, monitoring, by the terminal device, a physical downlink control channel on a specified carrier based on M DRX configurations corresponding to the M groups of carriers. In the DRX configuration manner, the terminal device simultaneously uses a plurality of DRX configurations in an overlay manner, thereby meeting quality of service requirements of different services sent by the terminal device.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit or otherwise indicate a semi-static slot format configuration and a dynamic slot format configuration to a user equipment (UE). The UE may determine a slot format configuration based on the received semi-static and dynamic slot format configurations. In some cases, the UE may replace certain resources of the semi-static slot format configuration with resources from the dynamic slot format configuration depending on a certain embodiment. Additionally or alternatively, the base station may transmit an anchor slot configuration to the UE, which may indicate which resources of the semi-static slot format configuration can be overridden or replaced by the dynamic slot format configuration.

Abstract: Methods, systems, and devices for wireless communication are described that support time mask techniques for shortened transmission time intervals (sTTIs) that may enhance low latency communications. Time masks may be identified and applied for transmissions that use sTTIs, in a manner that provides increased portions of sTTI durations having higher transmission power, and thus increase the likelihood of successful reception of such transmissions at a receiver. In some cases, a transmitter, such as a user equipment (UE), may identify one or more sTTIs for transmissions of a first wireless service (e.g., an ultra-reliable low-latency communication (URLLC) service). An sTTI may be identified based on a duration of a TTI associated with the first wireless service being below a threshold duration (e.g., a TTI duration of less than 1 ms may be identified as an sTTI).

Abstract: In future radio communication systems, an uplink control channel will be transmitted properly. A user terminal has a receiving section that receives frequency hopping information, which indicates whether frequency hopping for an uplink control channel is enabled or not, and a control section that applies at least one of a spreading factor for a time-domain orthogonal cover code, a configuration of a demodulation reference code and a base sequence, to the uplink control channel, based on the frequency hopping information.

Abstract: An electronic device for providing a communication service, and an operating method thereof is provided. Herein, the electronic device may include a communication circuitry, at least one processor, and a memory operatively coupled with the at least one processor to store a Tracking Area Identifier (TAI) list. The memory may include instructions, when executed, causing the at least one processor to run a specified first timer upon detecting an attach failure or a Tracking Area Update (TAU) failure in a first cell, perform cell reselection on a second cell during the first timer runs, determine whether a TAI of the second cell is included in the TAI list, and when the TAI of the second cell is included in the TAI list, forcibly expire the first timer, and transmit an attach request message or a TAU message through the communication circuitry.

Abstract: Generally, the described techniques provide for a user equipment (UE) generating a scheduling request (SR) for a set of data for an uplink transmission from the UE to a base station. The UE may determine whether the SR for the set of data is associated with a grant-free configuration for the UE. The grant-free configuration may indicate a set of time-frequency resources that the UE may use to transmit the set of data. The UE may transmit to the base station an indication of whether the SR is associated with the grant-free configuration. If the SR is associated with a grant-free configuration for the UE, the UE may use the corresponding resources to transmit the set of data to the base station, and the base station may then decode the data based on having received the indication of the resources by way of the grant-free configuration.

Abstract: A method for allocating an uplink resource includes: receiving an uplink (UL) grant sent by a base station; and allocating, based on a transmission profile corresponding to a logical channel, an uplink resource indicated by the UL grant to the logical channel, wherein the transmission profile corresponding to the logical channel is configured by the base station.

Abstract: A method includes assigning a symbol corresponding to a value of each of bit strings in a frame among the symbols in a constellation of a multi-level modulation scheme, to bit strings, converting a value of each of the bit strings other than a first bit string such that a symbol closer to a center of the constellation is assigned more among symbols, generating a error correction code for correcting an error of bit strings to insert the error correction code into the first bit string, generating the first error correction code from the bit strings other than the first bit string among bit strings, in a first period in which the error correction code is inserted into the first bit string in a period of the frame, and generating the error correction code from a second bit string in another second period in the period of the frame.

Abstract: Embodiments of the present disclosure relate to a method, device and computer program product for managing a service. The method comprises in response to processor credits for the service reaching threshold credits at a first time instant (t1), determining a second time instant when a first operation for the service is to be performed. The method further comprises determining, based on a set of historical processor credits between the first time instant and the second time instant, first processor credits related to a second set of time periods which is between the first time instant and second time instant.

Abstract: Methods and apparatus are described for providing compatible mapping for backhaul control channels, frequency first mapping of control channel elements (CCEs) to avoid relay-physical control format indicator channel (R-PCFICH) and a tree based relay resource allocation to minimize the resource allocation map bits. Methods and apparatus (e.g., relay node (RN)/evolved Node-B (eNB)) for mapping of the Un downlink (DL) control signals, Un DL positive acknowledgement (ACK)/negative acknowledgement (NACK), and/or relay-physical downlink control channel (R-PDCCH) (or similar) in the eNB to RN (Un interface) DL direction are described. This includes time/frequency mapping of abovementioned control signals into resource blocks (RBs) of multimedia broadcast multicast services (MBMS) single frequency network (MBSFN)-reserved sub-frames in the RN cell and encoding procedures for these.

Abstract: Fast simultaneous feasibility testing (SFT) for management of an electrical power grid is achieved through various innovations. The computation problem relates to evaluation of candidate solutions for external power flows into a power grid, with respect to predetermined constraints and contingencies. Storage and computations are reduced by formulating the problem in terms of transactional nodes (e.g. third party connections for generators and loads) instead of the larger number of bus nodes. Further advantages are achieved by precomputing matrices that can be reused across multiple SFT invocations, organizing matrices and operations to reduce storage and computation, and eliminating branches that have no contingency violations.

Abstract: Disclosed herein are methods, systems, and processes for dynamically deploying deception computing systems based on network environment lifecycle. Based on available lifecycle metadata associated with honeypots, a determination is made as to whether honeypot deployment criteria require maintaining a likelihood that a malicious attacker will target a given honeypot and/or preventing the malicious attacker from determining if a target is a protected host or the given honeypot. If a honeypot deployment criteria requires maintaining a likelihood that the malicious attacker will target the given honeypot, a ratio management operation is performed. In addition, if another honeypot deployment criteria requires preventing the malicious attacker from determining if the target is the protected host or the given honeypot, a host replacement operation is performed.

Abstract: The present disclosure provides a method and apparatus for generating spread symbols. The method includes: determining a spreading sequence according to a spreading sequence matrix, where the spreading sequence matrix is generated according to performance parameters of a plurality of user terminals; and spreading initial symbols by using the determined spreading sequence to generate spread symbols.

Abstract: There is provided an information processing apparatus including an acquiring unit that acquires communication quality of wireless communication at a location where a wireless communication apparatus exists, and a control unit that controls ON/OFF of another data communication function other than a data communication function to which a high priority is set, among data communication functions included by the wireless communication apparatus, based on the acquired communication quality.

Abstract: Methods of communicating in a wireless telecommunications system comprising a communications device, a master cell group comprising one or more infrastructure equipment of a first type and a secondary cell group comprising one or more infrastructure equipment of a second type, the communications device being in a coverage area of one of the infrastructure equipment of the first type and a coverage area of at least one of the infrastructure equipment of the second type, wherein the communications device is configured to transmit signals to and receive signals from the infrastructure equipment of the first type in accordance with a first communications protocol and to transmit signals to and receive signals from the at least one infrastructure equipment of the second type in accordance with a second communications protocol, the second communications protocol being different to the first communications protocol.

Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.

Abstract: Provided are a wireless communication terminal device and a control channel forming method with which, in the forming of a control channel for transmitting control information including an ACK/NACK and CSI (channel state information), wasteful use of resources is reduced compared to that in related art. In the case where CSI is transmitted independently, and in the case where CSI and an ACK/NACK are transmitted at the same time, the same format is used to form a control channel. Furthermore, in the case where an ACK/NACK is transmitted independently, another format is used if a component carrier (CC) number is equal to or less than 2, and the same format is used if the CC number is equal to or greater than 3.

Abstract: A method and apparatus are provided for receiving acknowledgement information by a base station in a wireless communication system. The method includes transmitting configuration information for transmission of the uplink control information, the configuration information including information for identifying a first resource block (RB) to be used for the transmission; and receiving the uplink control information on a physical uplink control channel based on the configuration information.

Abstract: The present disclosure is generally directed to an integrated charging and data transfer station for an electric vehicle. The integrated station includes a charger to transfer electricity to the electric vehicle. A data transfer system of the integrated station includes a fiber optic system to connect the electric vehicle to a network. Optionally, the integrated station can include a roof with a landing station for an unmanned aerial vehicle.

Abstract: Distributed cloud-based data storage divides a file for storage into a number of portions that are separately stored with two or more storage service providers. The division and/or transmission of the file may be implemented based on arbitrary criteria, including random selection, an applied storage policy or assignment of a given portion to a corresponding storage service provider as examples. One or more portions of the file may be assembled into an upload file that is transmitted to and received from a storage provider. The portions of the file received from the storage provider may be used to reconstruct the file.

Abstract: Systems and methods that may be configured to implement a nearest neighbor-based bank account validation process that may be used with electronic payments, transactions and or services.

Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.

Abstract: An existing Simple Authentication and Security Layer (SASL) framework is modified to overcome message size limitations by implementing a control byte that enables segmentation of SASL messages. In implementations in which client computing devices utilize a trusted platform module (TPM) for enhanced security, the client computing device can transmit multiple public keys and other information to a provisioning service during an attestation process. This information can be segmented across multiple messages while leveraging the SASL framework. A control byte may be utilized in each message and define attributes about the respective messages, such as whether a current message is an interim or final message segment. Likewise, the provisioning service can divide a challenge key into multiple segments and include a control byte for each segment. The control byte within segmented messages enables utilization of the TPM public keys and thereby can leverage the heightened security provided by the TPM.

Abstract: A user equipment (UE) periodically obtains its location using UE based Observed Time Difference of Arrival (OTDOA). The location is based on Reference Signal Time Differences (RSTDs) measured by the UE for downlink (DL) signals transmitted by each of a plurality of base stations, and the most current Real Time Differences (RTDs) for pairs of base stations. The RTDs may be determined by the UE using the RSTD measurements and Round Trip Time (RTT) measurements determined by a network entity or by the UE. The RTDs may be determined less frequently than the UE location to reduce network and UE load. Location of the UE may be improved based on testing a rate of change for each of the RTDs. The RTD determination may be improved using measurements from a plurality of UEs.

Abstract: A user equipment (UE) may communicate with a base station through a first active beam, the first active beam comprising a serving beam. The UE may receive a first reference signal and a second reference signal associated with beam tracking from the base station, where the first reference signal is received through a first beam of a first plurality of beams and the second reference signal is subsequently received through a second beam of a second plurality of beams, and where the beam tracking includes identifying a new beam for communication between the UE and the base station. The UE may communicate with the base station through a second active beam based on at least one of the first reference signal or the second reference signal associated with the beam tracking, the second active beam comprising the new beam.

Abstract: A method of measuring a total radiated power of a device under test by a test system with a base station simulator, a measurement antenna assigned to the base station simulator and a control and/or measurement equipment is described. The method includes: establishing a radio resource control connection between the device under test and the base station simulator via the measurement antenna; activating an uplink-beam lock function at the device under test; and performing a total radiated power measurement by the control and/or measurement equipment while continuously sending a downlink signal from the base station simulator via the measurement antenna to the device under test. A test system is further described.

Abstract: A gateway includes memory configured to store computer-readable program code; and processing circuitry configured to access the memory and execute the computer-readable program code. The gateway is connected or connectable to a low-power wide area (LPWA) network. The gateway is caused to transmit a common timing reference at a constant interval that delineates an epoch including timeslots assignable to network nodes and a free-for-all interval. The gateway is also caused to join a network node to the LPWA network based on the common timing reference and is further caused to receive a join message including a measure of received signal strength or quality of the common timing reference at the network node. The gateway is also caused to assign one or more timeslots within the epoch, a frequency, a channel, or a modulation to the network node based on the measure of received signal strength or other quality.

Abstract: A method for a user equipment to receive control information for a sounding reference symbol (SRS) transmission in a wireless communication system may comprise: a step of receiving, from a base station, any one piece of information on an SRS bandwidth (BW), the number of SRS blocks and the length of an SRS block which have been set up for the user equipment; and a step of transmitting an SRS on the basis of the control information.

Abstract: A ternary phase shift keying transmitter and receiver can efficiently communicate using ternary encoded data that avoids indistinguishable transition curves for each of the three modulated states in the ternary encoded data. The transmitter is interoperable and can function with different types of receivers including direct detection-based receivers and coherent detection-based receivers.

Abstract: Embodiments of the present application provide a relay network duplex coordination method and a relay node device. The method includes: according to configuration information, receiving, by a first node device, on a first time domain resource a first message sent by a second node device, and sending a second message to a third node device on a second time domain resource; wherein the configuration information indicates the first time domain resource and/or the second time domain resource, the second node device is a parent node of the first node device, and the third node device is a child node of the first node device.

Abstract: The present invention is designed so as to be able to preferably control the degradation of spectral efficiency even when communication is performed using a plurality of uplink control channel formats carrying different numbers of symbols. A user terminal according to one aspect of the present invention has a transmission section that transmits uplink control information using at least one of a plurality of uplink control channel structures carrying different numbers of symbols, and a control section that exerts control so that, regardless of which of the plurality of uplink control channel structures is used, a reference signal is mapped to a same time resource.

Abstract: The embodiments of the present application provide a method and apparatus for transmitting information, said method comprising: a terminal device determines a first transmission means used in a first time unit for transmitting destination uplink information; said first transmission means is different from a second transmission means used in a second time unit for transmitting said destination uplink information, and the duration of the second time unit used for transmitting the destination uplink information is different from the duration of the first time unit used for transmitting the destination uplink information; the terminal device uses the first transmission means to send the destination uplink information to a network device. The information transmission method and apparatus improve flexibility in allocating time resources in a system and thus improving system performance.

Abstract: The present disclosure relates to a mobile terminal, a base station, a method for data transmission/reception by a mobile terminal, and a method for data reception/transmission by a base station. The mobile terminal comprises circuitry which, in operation, receives a parameter defining a configuration for assigning to ports respective resources for carrying reference signals, the resources being grouped in a plurality of code division multiplexing, CDM, groups, and receives control information indicating one of the set of layer-to-port mapping combinations which is to be applied for arranging reference signals on ports of at least one CDM group for data transmission and/or reception, wherein the control information indicates a co-scheduling information for the at least one and/or at least a different CDM group of the plurality of CDM groups for the same data transmission and/or reception.

Abstract: A location multi-factor verification method may comprise initiating a boot process of a client device via firmware of the client device, receiving, via a network interface device, an access point (AP) beacon frame identifying a nearby AP, transmitting the AP beacon frame to a location determination service via the network interface device, receiving a geographic location estimation from the location determination service, based on the AP beacon frame, transmitting the geographic location estimation to the nearby AP, and granting a user of the client device access to an operating system of the client device if a boot process authorization instruction is received at the client device via the network interface device.

Abstract: Aspects relate to managing a device-to-device communication link via radio resource control (RRC) layer signaling. In an example operation, a first wireless communication device establishes a unicast link with a second wireless communication device over a device-to-device communication interface and determines that the unicast link is to be reconfigured with at least one updated parameter. The first wireless communication device then sends a link reconfiguration request to the second wireless communication device via a first RRC message over the communication interface. The first RRC message includes the at least one updated parameter. The first wireless communication device receives a link reconfiguration response from the second wireless communication device via a second RRC message over the communication interface based on the link reconfiguration request and determines whether to reconfigure the unicast link using the at least one updated parameter based on the received link reconfiguration response.

Abstract: There is disclosed a method in a data processing system for automatically and accurately determining an outcome of a phone call by using signifiers or audibles as a way to increase accuracy without altering the flow of the conversation. The disclosed method can be used in any call center, such as a high volume call center used in the financial (banking), insurance, rental (hotel or car), ticket sales, and the like. The method comprises receiving voice data of a phone call; transmitting a response communication based on the voice data, wherein the response communication includes at least one audible or signifier; identifying, by at least one processor, the at least one audible or signifier in the response communication; and automatically determining the outcome of the phone call based on the audible or signifier in the response communication. A data processing system and a non-transitory computer-readable medium for storing instructions consistent with the described method are also disclosed.

Abstract: A method and apparatus for performing transmission in a wireless communication system is provided. A narrowband internet-of-things (NB-IoT) user equipment (UE) transmits a physical uplink shared channel (PUSCH) to a network by using a first resource unit, and transmits an acknowledgement/non-acknowledgement (ACK/NACK) to the network by using a second resource unit. The first resource unit for PUSCH transmission consists of a first number of resource elements (REs) within a first tone in frequency domain and a first time interval in time domain. The second resource unit for ACK/NACK transmission also consists of a second number of REs within a second tone in frequency domain and a second time interval in time domain. The second number is smaller than the first number.

Abstract: This disclosure provides systems, methods and apparatus, and computer programs encoded on computer storage media, for managing paging monitoring by a wireless device. In one aspect, the wireless device may receive a serving cell signal from a cell. The wireless device may determine a delay time based on the serving cell signal. The wireless device may monitor for the paging signal during the determined delay time. The wireless device may stop the monitoring for the paging signal upon or after expiration of the determined delay time. In some aspects, the wireless device may receive an indication of multiple paging signal monitoring occasions from the cell, which may include an indication of a number of synchronization signal blocks (SSBs) to be transmitted from the cell and a number of physical downlink control channel (PDCCH) monitoring occasions per SSB in a paging occasion.

Abstract: A system and method for including multiple data rate sub-blocks within a single data block includes dividing data blocks based on a priority or intended set of recipients. The sub-blocks are modulated at increasing data rates and the modulated sub-blocks are appended together and bounded by the known symbol blocks during transmission. The sub-blocks are organized in order of increasing data rate. During decoding, detected symbols of a first, low data rate sub-block are included in the detection process of higher data rate sub-blocks in place of additional symbols that would otherwise be needed for higher data rate transmissions. Alternatively, the sub-blocks may be organized with low data rate sub-block at the periphery and higher data rate sub-blocks in the interior such that the data block may be decoded from both ends.

Abstract: The disclosure provides a communication time allocation method using reinforcement learning for a wireless powered communication network and a base station. The method includes: determining a communication time allocation corresponding to the t-th time block according to an objective function associated with the total estimated throughput of the communication nodes; requesting each communication node to perform specific communication behaviors according to the corresponding communication time interval in the t-th time block; obtaining the actual throughput of each communication node in the t-th time block; generating the weight vector of each communication node in the (t+1)-th time block according to the actual throughput, the weight vector, and the estimated throughput of each communication node in the t-th time block.

Abstract: A method and system is described in which a client device comprises a memory arranged as a user space and a kernel space. One operation comprises providing in the user space a user space control module for receiving one or more application calls destined for the kernel space. Another operation comprises receiving by the user space control module an application call for requesting data transmission using one or more kernel space network services. Another operation comprises implementing the requested data transmission over multiple paths from the client device under the control of the user space control module.

Abstract: A method includes receiving positioning configuration information from a base station or location server while in an RRC_connected mode; transitioning to an RRC_idle or RRC_inactive mode, while saving the positioning configuration information; receiving a reference signal for positioning from the base station; performing positioning measurements, while in the RRC_idle or RRC_inactive mode; and sending a location report to the base station or location server while remaining in the RRC_idle or RRC_inactive mode. A related method includes sending positioning configuration information to a user equipment in an RRC_connected mode; sending the user equipment to RRC_idle or RRC_inactive mode by an RRC suspend procedure; sending a reference signal for positioning to the user equipment; receiving a location report from the user equipment in the RRC_idle or RRC_inactive mode; and forwarding the location report from the user equipment to a location server.

Abstract: A first radio node including processing circuitry configured to configure the first radio node to: obtain a first interference subspace, obtain beamforming weights based on the first interference subspace where the beamforming weights configured to modify a radiation pattern in at least one communication direction of at least one interference source, and perform wireless communications based on the beamforming weights.

Abstract: The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes categorizing a number of synchronization signal (SS) blocks into M groups, each group having N SS blocks, wherein M and N are integers and assigning a power level for P transmitted group (s), wherein P is an integer and 1<=P<=M. The SS blocks in each of the P transmitted groups are transmitted in a same assigned power level.

Abstract: A method for transmitting a channel status information reference signals (CSI-RSs) for a maximum of eight antenna ports includes mapping the CSI-RSs for a maximum of eight antenna ports onto a data region of a downlink subframe having a normal cyclic prefix (CP) configuration according to a predetermined pattern; and transmitting the downlink subframe to which the CSI-RSs mapped, wherein the predetermined pattern defines the CSI-RSs to be mapped onto two OFDM symbols of the data region in the downlink subframe and mapped to at least one of four subcarrier positions in each of the two OFDM symbols, and wherein the four subcarrier positions defined by the predetermined pattern may be two consecutive subcarrier positions and two other consecutive subcarrier positions spaced apart by four subcarriers.