Abstract: An apparatus includes an input node, an output node, and successive butterfly elements connected between the input node and the output node. Each butterfly element includes a first branch and a second branch that are cross-coupled with each other and that perform, collectively, sample add and sample delay operations. Either the first branch or the second branch of each butterfly element performs a sample inversion, such that a pattern of the sample inversions across the butterfly elements encodes into the butterfly elements a pattern of negative and positive binary values of a particular row of a Prometheus Orthonormal Sets (PONS) matrix. As a result, the successive butterfly elements correlate input samples applied to the input node against the particular row of the PONS matrix as the input samples are shifted through the successive butterfly elements.

Abstract: The least-significant-bits (LSBs) of a first data word of a first subset of a first plurality of data words may be compared to the LSBs of each data word of a second subset of a second plurality of data words. The first data word may then be mapped to a second data word of the second subset. A number of LSBs of the second data word matching LSBs of the first data word may be greater than a respective number of LSBs of each data word of a third subset of the second subset matching the LSBs of the first data word, where the third subset excludes the second data word and a most-significant-bit (MSB) of the second data word may be the same as a MSB of the first data word.

Abstract: A method performed by a network device that taps to a network having a routing device, includes: receiving a first packet tapped from the network; determining a first information regarding an input interface of the routing device based on a destination address of the first packet; receiving a second packet tapped from the network; determining a second information regarding an output interface of the routing device based on a source address of the second packet; determining a first CRC for the first packet; determining a second CRC for the second packet; and comparing the first CRC with the second CRC at the network device to determine whether the first packet and the second packet are the same.

Abstract: Methods, systems, and devices for wireless communications are described. A source user equipment (UE) may determine which subscriber identity module (SIM) card to use based on information of the target UE. For example, the target UE may have poor call quality using a first SIM, but high call quality when using a second SIM. The target UE may indicate the call quality for each SIM in subscription information to the source UE. The source UE may determine to use the second SIM of the target UE instead of the first SIM, resulting in higher call quality for the target UE. The subscription information may include a variety of information related to the target UE, such as subscriptions of the target UE, RAT availabilities for the target UE, etc. The target UE may also configure settings for receiving or rejecting data calls. The target UE may configure whether to receive data calls based on connectivity parameters.

Abstract: A method and an apparatus for transmitting a reference signal. A first reference signal is generated according to a data signal, an interference relationship between adjacent carriers, and a predefined second reference signal. The data signal and the first reference signal is modulated and sent on a corresponding carrier utilizing non-orthogonal multi-carrier modulation waveform. A method for receiving a reference signal includes receiving, on a reference signal carrier, a first reference signal modulated utilizing non-orthogonal multi-carrier modulation waveform, processing the received first reference signal using a predefined processing method, performing channel estimation or synchronization according to a result of the processing and a predefined second reference signal.

Abstract: Certain aspects of the present disclosure provide techniques for signaling information regarding beams used for data and control transmissions to a receiving entity.

Abstract: A mobile communications device may determine whether to report information regarding operation of the mobile device on a mobile network. The determination may be based on a reporting parameter set by a network control device and received via a broadcast message from a radio access node. The mobile device may compare the value of the reporting parameter to a randomly generated number. Based on the comparison, the mobile device may determine whether or not to provide information regarding operation of the mobile device or the radio access node to the network control device. The network control device may adjust the value of the reporting parameter to control the likelihood that a mobile device will report.

Abstract: An eNodeB (eNB), user equipment (UE) and method of providing a quasi-orthogonal multiple access (QOMA) resources are generally described. The UE receives allocation of orthogonal multiple access (OMA) and non-OMA (NOMA) resources. The UE transmits data up to a maximum NOMA rate and NOMA Modulation and Coding Scheme (MCS) using the NOMA resources without receiving an explicit transmission grant from the eNB. The eNB may allocate multiple NOMA regions associated with different maximum rates, MCSs, number of UEs, UE types, applications and sizes. If the data exceeds the NOMA conditions or the UE is unable to transmit data using the allocated NOMA resources or does not receive an acknowledgement from the eNB regarding reception of the transmitted data, the UE may request an explicit grant of the OMA resources from the eNB and, upon receiving an allocation of the OMA resources, subsequently transmit the data using the allocated OMA resources.

Abstract: A method for processing a medium access control entity, UE and a communication system. The method includes: establishing a corresponding medium access control entity by UE for a second connectivity, so that there exists dual connectivity between the UE and network side including a first connectivity and the second connectivity; wherein the medium access control entity of the second connectivity at least includes a multiplexing or de-multiplexing module and a logic channel prioritization module. Resources of the UE may be efficiently managed, and waste of resources is reduced based on control optimization.

Abstract: An apparatus includes a phased array antenna panel and one or more beam former circuits mounted on the phased antenna array panel. The phased array antenna panel generally comprises a plurality of antenna elements arranged in one or more groups. Each of the one or more beam former circuits may be coupled to a respective group of the antenna elements. Each of the one or more beam former circuits may comprise a plurality of transceiver channels. Each transceiver channel generally comprises a power amplifier circuit configured, when operating in a transmit mode, to drive a respective one of the antenna elements. The power amplifier generally comprises a feedback network coupled between an output and an input of the power amplifier circuit.

Abstract: Disclosed is a method for estimating a channel by a first terminal in a wireless communication system. Particularly, the method comprises the steps of: obtaining information associated with whether a first pre-coder for the first terminal and a second pre-coder for a second terminal are identical to each other; estimating, as a single effective channel, a first effective channel between a base station and the first terminal and a second effective channel between the base station and the second terminal when the first pre-coder and the second pre-coder are identical to each other; individually estimating the first effective channel and the second effective channel when the first pre-coder and the second pre-coder are different from each other.

Abstract: Embodiments relate to systems and methods for generating a selection of cloud data distribution service from alternative providers for staging data to host clouds. In aspects, a user can maintain a user premise network including servers, clients, local area networks, data stores, and/or other network assets. An administrator or other user of the premise network may wish to extract data from the premise network and transfer that data to host storage clouds to leverage cost, redundancy, consolidation, or other cloud advantages. A set of cloud data delivery (CDD) services can be established to stage the upload of the data payload to the set of destination host storage clouds. Uploads to the one or more intermediate CDD services can be made using a set of high-bandwidth managed or dedicated lines. The user can interrogate the set of alternative CDD services accessible to the premise network, and identify CDD services capable of staging the premise data to data stores in those intermediate services.

Abstract: A method and apparatus for accessing a random access channel (RACH) during handover are disclosed. A handover procedure is initiated and a maximum handover interruption timer is activated. A dedicated preamble is transmitted in an attempt to access the RACH on a condition that the dedicated preamble is reserved in a current random access opportunity and the maximum handover interruption timer has not expired. A contention-based preamble is transmitted in an attempt to access the RACH on a condition that a dedicated preamble is not reserved in a current random access opportunity. If the maximum handover interruption timer has expired, a contention-based preamble is transmitted in an attempt to access the RACH.

Abstract: According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including information to specify a plurality of frequency components; and controlling circuitry configured to determine whether a second frame is received via each of the plurality of frequency components. The transmitter is configured to transmit a third frame including first information concerning a first value range which is used to determine whether to respond to the first frame, the first value range being dependent on a number of frequency components via which the second frame has been received.

Abstract: Apparatus for encoding a plurality of received radio frequency (RF) analog signals. The apparatus includes a plurality of pseudo-noise (PN) encoders for performing analog signal spreading and down-conversion. Each PN encoder is configured to encode a respective received RF analog signal using a respective one of a plurality of mutually orthogonal PN complex codes and to output a respective PN-encoded analog signal. The apparatus also includes a PN complex code source configured to provide the mutually orthogonal PN complex codes to the plurality of PN encoders. The PN complex code source includes a code generator for generating multiple mutually orthogonal PN codes, and a complex modulator for modulating the mutually orthogonal PN codes.

Abstract: The present invention relates to a wireless access system which supports machine-type communication (MTC), and more specifically, to various methods for establishing the number of hybrid automatic retransmission request (HARQ) processes to support HARQ, and to apparatuses supporting same. A method for establishing the number of HARQ processes in a wireless access system which supports machine-type communication (MTC), according to one embodiment of the present invention, may comprise the steps of: determining, by a base station, the number of HARQ processes to be applied to an MTC terminal; and transmitting, by the base station, downlink control information including a HARQ process value allocated to the MTC terminal from among the determined number of HARQ processes.

Abstract: There is provided, in accordance with an embodiment, a method of decoding codewords in conjunction with a low-density parity-check (LDPC) code that defines variable nodes and check nodes, the method comprising receiving a codeword over a data channel; evaluating quality of the data channel; and iteratively updating values of the variable nodes to decode the codeword; wherein the values of the variable nodes are updated at different levels of numeric precision depending on the evaluated quality of the data channel.

Abstract: Embodiments of the present invention provide a method and an apparatus for setting up an interface between access points, where a first AP receives measurement information reported by at least one station associated with the first AP, to learn an AP identifier of a second AP having a capability of supporting an AP2AP interface, determines an AP identifier of a candidate AP according to interface information in the measurement information, and sends, to the candidate AP by using an AC, a first request message requesting an IP address used for setting up a communications interface between APs, the candidate AP sends, by using the AC, a response message to the first AP according to the first request message, and the first AP determines, according to the response message, whether to set up an AP2AP communications interface with the candidate AP that sends the response message.

Abstract: Programming of frozen bits of first stage control channel information block enables scheduling information to be included for the second stage of the control channel information. By including some of the scheduling information for the second stage in the first stage frozen bits, the size of the first stage information blocks can be reduced, reducing the overhead required to transmit control information for the traffic channel. In an embodiment, the frozen bits can convey scheduling information that is lower priority than the scheduling information conveyed in the non-frozen bits of the first stage control channel information block. In another embodiment, the frozen bits can include parity bits, or cyclic redundancy check bits that are masked with the scheduling information.

Abstract: A method and apparatus for transmitting or detecting primary synchronization signal. The receiver receives primary synchronization signal from a transmitter, and detects the sequence used in the received primary synchronization signal by using three root indexes. Here, the primary synchronization signal is generated by using a Zadoff-Chu sequence having one of the three root indexes. The three root indexes comprise a first index and a second index, and a sum of the first index and the second index corresponds to the length of the Zadoff-Chu sequence.

Abstract: A radio transmission apparatus includes a first antenna, a second antenna, and circuitry configured, based on information associated with an estimated communications channel condition, to generate a single modulation signal or a plurality of modulation signals based on the estimated communications channel condition information, and to (i) transmit the single modulation signal from the first antenna or (ii) transmit the plurality of modulation signals which include different information from each other over an identical frequency band from the first antenna and the second antenna at an identical temporal point. The single modulation signal and the plurality of modulation signals contain parameter information indicating a number of modulation signals transmitted at the same time.

Abstract: Uplink transmission power levels may be adjusted in response to changes in a directional beam used for wireless communications. A beam change may be identified, wherein the beam change includes a transition from a first transmission configuration based on a first beam direction of a cell to a second transmission configuration based on a second beam direction of the cell. A downlink (DL) message associated with the beam change may be received, wherein the DL message comprises a transmission power indication. An uplink (UL) message may be transmitted at a power level based at least in part on the transmission power indication.

Abstract: In one example, the present disclosure provides a phased array antenna system with a first array of antenna elements and a first radio frequency beamforming network configured to split the power of a radio frequency signal for transmission into a first plurality of component signals comprising drive signals for the first array of antenna elements, the first radio frequency beamforming network further configured to combine a radio frequency signal for reception by the phased array antenna system from a second plurality of component signals from the first array of antenna elements, where a radio frequency power distribution of the first radio frequency beamforming network is arranged to provide a weighting of the first plurality and the second plurality of component signals processed via antenna elements towards one end of the first array.

Abstract: Antenna selection and reassignment in multiple radio access technology (RAT) communication systems with unlicensed spectrum is disclosed. Aspects include a user equipment (UE) monitoring for a channel reserving signal in each frame from multiple transmission sources. If no channel reserving signal is detected, then the UE reassigns one or more of the antennas previously assigned to the transmission sources with no activity detected. Additional aspects include base stations that determine a clear channel assessment (CCA) status for each of unlicensed carrier designated for transmission to a UE. The base station will transmit a receive antenna usage adjustment signal to the UE based on the determined CCA status.

Abstract: According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including information to specify a plurality of frequency components; and controlling circuitry configured to determine whether a second frame is received via each of the plurality of frequency components. The transmitter is configured to transmit a third frame including first information concerning a first value range which is used to determine whether to respond to the first frame, the first value range being dependent on a number of frequency components via which the second frame has been received.

Abstract: The present disclosure discloses a terminal, a base station, a network controller, a system, and a transmission method. The terminal includes: a receiving module, configured to receive configuration information of at least one air interface-specific path sent by a base station, where the air interface-specific path is used to transmit application data corresponding to at least one application; and a sending module, configured to: if the to-be-sent application data is discontinuously transmitted and has a length less than a preset threshold, use the at least one air interface-specific path to send the application data to the base station. According to embodiments of the present disclosure, when a terminal transmits data or signaling that is discontinuous and has a relatively small length, consumption of network signaling resources is reduced, so that a normal network service properly runs.

Abstract: A multi-antenna apparatus for controlling transmission and reception of signals based on channel estimation includes: a signal transmitter configured to transmit a first signal using a multi-antenna; a signal receiver configured to receive a second signal using the multi-antenna based on the transmitted first signal; a signal transferrer configured to receive a third signal received from the signal transmitter and provide the third signal to the signal receiver; and a controller configured to estimate a channel state of the multi-antenna based on the second signal and the third signal obtained from the signal receiver, and control transmission and reception of signals through the multi-antenna according to the estimated channel state.

Abstract: Wireless communications systems and methods related to reusing long-term evolution (LTE) resources in a nested network system are provided. A first wireless communication device receives, from a second wireless communication device, a reference signal configuration of a first network of a long-term evolution (LTE) radio access technology (RAT). The first wireless communication device and the second wireless communication device are associated with a second network of another RAT. The first wireless communication device receives, from the second wireless communication device, a communication signal in the second network based on the reference signal configuration of the first network. The reference signal configuration indicates at least one of a frequency tone of a reference signal of the first network, a time period of the reference signal of the first network, or a number of antenna ports associated with the reference signal of the first network.

Abstract: Embodiments of the invention provide a recording device, which comprises a recording unit, a management unit and a storage unit, wherein the management unit is arranged to generate an identification code and write the identification code into the storage unit, the storage unit is arranged to store the identification code, and the recording unit is arranged to read the identification code from the storage unit and record the identification code into TFT display module. The recording device can record the unique code for each TFT display module to uniquely distinguish different TFT display modules, thereby facilitating tracking and adjustment of parameters, such as color and the like, of an installed TFT display terminal. On the other hand, the recording device can simplify a large amount of complex marking work, and guarantee that the TFT display modules would not be identified mistakenly while saving manpower and material resources.

Abstract: An information processing apparatus of this invention directed to a process for adjusting a switching interval which defines an interval between two switching operations that change the activation state of the base band units. The apparatus comprises a traffic history storage unit that stores traffic history data, and a control unit that determines the switching interval based on the traffic history data stored in the traffic history storage.

Abstract: The present invention provides an uplink feedback method, user equipment, and a base station, where the method includes: detecting, by user equipment, downlink data in at least two consecutive downlink sub-frames; performing joint encoding, by the user equipment, for a feedback for the downlink data in the at least two consecutive downlink sub-frames; and transmitting, by the user equipment in an uplink sub-frame corresponding to the last sub-frame of the at least two consecutive downlink sub-frames, joint uplink feedback information for the at least two consecutive downlink sub-frames, so as to resolve issue how uplink feedback is performed when downlink bandwidth is different from uplink bandwidth.

Abstract: A mobile terminal, method and non-transitory computer-readable medium for simultaneously utilizing at least two different radio access technologies (RATs). In one embodiment, the mobile terminal includes: at least one processor configured to control and coordinate first and second radio resource control functions corresponding to first and second RATs, respectively; and map a logical channel to first and second transport channels corresponding to the first and second RATs.

Abstract: The invention is related to a digital-data mixing apparatus (2), a data processing system (1) and an associated method for mixing digital-data. The digital-data mixing apparatus comprises, integrated in a housing (7), input means (8) for receiving a plurality of bits (I1 . . . In) of input digital data (4), electromagnetic emission means (9) for generating a modulated electromagnetic beam (15) wherein said input digital data (4) are converted in simultaneous modulations of the modulated electromagnetic beam (15), electromagnetic scattering means (10) for scattering the modulated electromagnetic beam (15) in a scattered electromagnetic beam (19), receiving means (11) for converting the scattered electromagnetic beam (19) in bits (O1 . . . Om) of output digital data (5), and output means (12) for providing said output digital data (5).

Abstract: Embodiments include systems and methods for performing selection of a transport format combination by a device processor of a wireless communication device. The device processor may determine whether radio frequency self-jamming interference is detected at the receiver of the wireless communication device. The device processor may calculate an average transmit power reduction in response to determining that radio frequency self-jamming interference is detected at a receiver of the wireless communication device. The device processor may select a transport format combination based on the calculated average transmit power reduction, and may use the selected transport format combination to transmit data to a communication network.

Abstract: Signal precoding can include: determining a first antenna pattern gain for a beam directed from a first antenna feed on the satellite toward a first user terminal in a first cell and determining a second antenna pattern gain for a beam directed from a second antenna feed on the satellite toward a second user terminal in a second cell adjacent to the first cell; wherein the adjacent cells are partitioned into sectors; determining a first sector location of the first user terminal and a second sector location of the second user terminal; a precoder matrix circuit using the determined first and second antenna pattern gains to calculate a precoder matrix to reduce interference levels caused by the first signal at the second sector and by the second signal at the first sector; and the precoder matrix circuit applying the precoder matrix to the first and second signals.

Abstract: A wireless network includes a channel allocation manager and multiple wireless access points. The wireless channel allocation manager receives a request from a first wireless access point amongst multiple wireless access points for allocation of a wireless channel. In response to receiving the request for allocation of a wireless channel, the channel allocation manager selects a particular wireless channel for allocation to the first wireless access point in the network environment. The channel allocation manager notifies the multiple wireless access points of a particular wireless channel that has been allocated for use by the first wireless access point (or its subordinates) in a specified timeframe. The first wireless access point either uses the allocated channel to communicate data downstream to a respective mobile communication device or notifies the mobile communication device that the particular wireless channel has been allocated to communicate upstream to the first wireless access point.

Abstract: A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal.

Abstract: The present invention relates to a method and a device for transmitting a vehicle to everything (V2X) signal of user equipment for V2X communication in a wireless communication system. Particularly, the present invention comprises the steps of: receiving a resource pool configuration of which a first resource unit and a second resource unit, set for V2X communication, are defined; and transmitting the V2X signal, according to the resource pool configuration, through a specific resource region among the entire time-frequency hopped resource region, wherein the first resource unit is a multiple of the second resource unit, a first resource region corresponding to the first resource unit comprises a plurality of second resource regions corresponding to the second resource unit, and with respect to time-frequency hopping, frequency axis-based hopping or time axis-based hopping is determined according to a period of the V2X signal.

Abstract: There are provided measures for information exchange for cellular non-cellular interworking such as for example LTE/UTRA-WiFi interworking. Such measures may exemplarily comprise measures for reporting, e.g. from an access point of a non-cellular local-area communication system or a terminal being served in a cellular wide-area communication system, information about at least one access point of the non-cellular local-area communication system to a radio access network level of the cellular wide-area communication system, and performing, at the radio access network level of the cellular wide-area communication system, traffic offloading management for at least one terminal being served in the cellular wide-area communication system to enable offloading of terminal-related traffic from the cellular wide-area communication system to the non-cellular local-area communication system on the basis of the obtained access point information.

Abstract: Compressed modulation feedback in codeword transmission with per-layer-modulation mapping is discussed. In the proposed compression schemes, the number of bits of feedback is compressed by excluding some of the allowed combinations of per-layer modulation orders. The excluded combinations are determined according to a fixed index delta, which prohibits any one modulation scheme being selected that has an index difference greater than the fixed index delta. The transmitting entity may then send per-layer modulation parameters, which may be the actual modulation orders identified or some relative parameter.

Abstract: Data is synchronized between a mobile device and a computing device over a wireless link. Synchronization operations are scheduled according to a synchronization schedule that is based on a current time of day. In one embodiment, the day can be divided into different time periods by the user. The user can also specify the frequency with which synchronization operations are to be performed during each specified period.

Abstract: Methods, systems, and computer programs are presented for managing a global network topology. One method includes an operation for generating, by a network device, a local topology identifying which network entities are connected to each external port of the network device. The network device is configured to execute a network device operation system (ndOS), and the network device is configured to share information associated with the local topology with other ndOS network devices that execute ndOS. Further, the method includes an operation for receiving one or more remote local topologies from respective one or more ndOS network devices. The network device generates a global topology based on the local topology and the one or more remote local topologies, where the global topology is shared by the network device and the ndOS network devices executing ndOS, and the global topology identifies which entities are connected to one or more of the ndOS network devices.

Abstract: A method for transmitting a signal by a transmitting side device, the method including combining a first sequence and a second sequence to generate a third sequence in a frequency domain. The second sequence is obtained by cyclic shifting the first sequence. The method further includes transforming the third sequence into a time domain signal; and transmitting the time domain signal to a receiving side device. The third sequence includes information to identify a cell and is periodically transmitted.

Abstract: Various aspects of the disclosure relate to a codebook design that defines phase rotation on one or more layers of a codebook. This codebook may be used, for example, for sparse code multiple access (SCMA) encoding. One feature pertains to a method of communication that includes receiving at least one input signal, and mapping each of the at least one input signal to a corresponding layer of a codebook, where the codebook defines phase rotation between the layers. The method may further include generating a coded signal for each of the at least one input signal on each corresponding layer based on the codebook, and generating an output signal based on each generated coded signal.

Abstract: Systems and methods for playing adaptive bitrate streaming content by multicast in accordance with embodiments of the invention are disclosed. In one embodiment, a method of receiving and playing back adaptive bitrate streaming content using a playback device includes receiving an adaptive streaming session description including information about a piece of adaptive streaming content and information for accessing a multicast session of the piece of adaptive streaming content using a playback device, receiving portions of a first alternative stream of the piece of adaptive streaming content sent to a first multicast group that includes the playback device using the playback device, computing a bandwidth measurement using the playback device, and switching to a second alternative stream of the piece of adaptive streaming content based upon the computed bandwidth measurement using the playback device.

Abstract: A device includes a first terminal configured to receive a reference voltage, a second terminal configured to receive a weighted tap value, a local generator circuit configured to create a group of unsigned voltage correction values based on the reference voltage and the weighted tap value, and a sign configuring circuit configured to receive the group of unsigned voltage correction values from the local generator circuit and assign a polarity to each respective unsigned voltage correction value of the group of unsigned voltage correction values, creating correction signals from the group of unsigned voltage correction values. The device also includes an output configured to transmit the correction signals to a first input of a processing circuit, wherein the processing circuit is configured to use the correction signals to offset inter-symbol interference from a data stream on a distorted bit based at least on a control signal.

Abstract: Provided are a method and a device for arranging a subframe structure of a short TTI according to the change in a control region in a wireless communication system. Specifically, a plurality of first downlink channels received during an sTTI and a second downlink channel received during a TTI are received. The number of symbols used for each of the plurality of first downlink channels is determined by a format indicator channel included in the first symbol of a subframe. Further, the plurality of first downlink channels are demodulated by using scheduling information included in each of the plurality of first downlink channels, and the second downlink channel is demodulated by using scheduling information included in a control region indicated by the format indicator channel.

Abstract: The present disclosure discloses a method and an apparatus for hybrid multiplexing/de-multiplexing in a passive optical network, the method comprising steps of: dividing N first intermediate frequency sub-bands averagely into M clusters, wherein each of the clusters contains K first intermediate frequency sub bands and N=M*K, and wherein each of the K first intermediate frequency sub-bands carries a baseband digital electrical signal; selecting, by a software defined first intermediate frequency multiplexer, the baseband digital electrical signals of K first intermediate frequency sub-bands from the N first intermediate frequency sub-bands for software defined frequency division multiplexing and forming a cluster; and frequency division multiplexing, by an analog hardware cluster multiplexer, analog electrical signals of the M clusters on a second intermediate frequency sub-band.

Abstract: There are provided a method for transmitting data including collecting signal-to-noise ratio (SNR) information of a plurality of neighbor nodes, recognizing that at least one reception node to receive data in an nth frame exists, among the plurality of neighbor nodes, setting a modulation and coding scheme (MCS) on the basis of the SNR of the at least one reception node, and transmitting data to the at least one reception node by using the same radio resource on the basis of the MCS, and an apparatus and method for receiving data including receiving data from at least one transmission node, determining a threshold value of each transmission node on the basis of information regarding a modulation and coding scheme (MCS) of the at least one transmission node, and canceling interference with respect to the data on the basis of a signal-to-noise ratio (SNR) of the at least one transmission node and the threshold value.

Abstract: A method of transmitting pilot signals in a system which performs communication using two or more earners comprises transmitting first pilots and second pilots from at least one user equipment to a base station, the first and second pilots, which are transmitted from the at least one user equipment, being multiplexed by code division multiplexing, and the first and second pilots, which are transmitted from a specific user equipment, having different transmission powers, and transmitting data from the at least one user equipment to the base station depending on the first pilots and the second pilots. Since many UEs can transmit CQ pilots, exact channel estimation can be performed and thus communication efficiency can be improved.