Abstract: A broadcast signal receiver is disclosed. A broadcast signal receiver according to an embodiment of the present invention comprises a synchronization & demodulation module performing signal detection and OFDM demodulation on a received broadcast signal; a frame parsing & deinterleaving module performing parsing and deinterleaving of a signal frame of the broadcast signal; a demapping & decoding module performing conversion of data of at least one Physical Layer Pipe (PLP) of the broadcast signal into the bit domain and FEC decoding of the converted PLP data; and an output processing module outputting a data stream by receiving the at least one PLP data.

Abstract: A securely pre-coded orthogonal frequency division multiplexing (SP-OFDM) system includes a transmitter configured to transmit a secure transmit signal through a dynamic constellation and a receiver configured to recover the original signal from the received secure transmit signal. It is aimed to reinforce the physical layer security of wireless communications under hostile interference. Potential applications include 4G and 5G communication systems, ASTC3.0 HDTV systems, WiFi systems, and any future wireless systems that utilize OFDM.

Abstract: Disclosed in some examples are methods, systems, devices, and machine-readable mediums which optimize one or more metrics of a communication system by intentionally changing symbols in a bitstream after encoding by an error correction coder, but prior to transmission. The symbols may be changed to meet a communication metric optimization goal, such as decreasing a high PAPR, reducing an error rate, reducing an average power level (to save battery), or altering some other communication metric. The symbol that is intentionally changed is then detected by the receiver as an error and corrected by the receiver utilizing the error correction coding.

Abstract: Embodiments of methods and systems for supporting coexistence of multiple technologies in a Power Line Communication (PLC) network are disclosed. A long coexistence preamble sequence may be transmitted by a device that has been forced to back off the PLC channel multiple times. The long coexistence sequence provides a way for the device to request channel access from devices on the channel using other technology. The device may transmit a data packet after transmitting the long coexistence preamble sequence. A network duty cycle time may also be defined as a maximum allowed duration for nodes of the same network to access the channel. When the network duty cycle time occurs, all nodes will back off the channel for a duty cycle extended inter frame space before transmitting again. The long coexistence preamble sequence and the network duty cycle time may be used together.

Abstract: Disclosed according to one embodiment of the present invention is a method whereby a first station (STA) transmits signals using dual carrier modulation (DCM) in a wireless LAN system, comprising: modulating HE-SIG B field information and/or data field information on a wireless frame transmitted by the first STA and transmitting same to a second STA, wherein in the case of modulating the HE-SIG B field information and/or the data field information in a BPSK mode, if a random symbol C1 among symbols modulated in the BPSK mode is mapped to a subcarrier K, a symbol formed by rotating the phase of the symbol C1 is mapped to a subcarrier K+N/2 in a repeating manner, wherein N corresponds to the number of subcarriers of a resource unit for transmitting the HE-SIG B field information and the data field information and K is a random integer equal to or less than N/2.

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for aggregation level specific PDCCH modification.

Abstract: According to an embodiment of the inventive concept, a device for PAM-3 signaling includes an encoder selecting one of first to ninth transitions in first and second unit intervals that are successive and mapping data of three bits by using a remaining eight transitions other than the one selected among the first to ninth transitions, and an output driver receiving an output signal of the encoder via an input and generating a multi-level signal having an output voltage of first to third levels. The data of three bits is transmitted to a receiver terminal through the multi-level signal having the output voltage of the first to third levels during the first and second unit intervals that are successive. The device for PAM-3 signaling according to an embodiment of the inventive concept may transmit three bits during two unit intervals and may allow a receiver terminal to detect a windowing phenomenon.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may determine an adapted codebook for beamforming transmission based at least in part on an initial codebook and one or more spatial parameters, wherein the adapted codebook is associated with an adapted set of candidate beams with an adapted angular range that is different than an initial angular range of an initial set of candidate beams of the initial codebook. In some aspects, the transmitter device may transmit using at least one beam of the adapted set of candidate beams associated with the adapted angular range based at least in part on determining the adapted codebook. Numerous other aspects are provided.

Abstract: Methods and apparatus for dynamic acknowledgement list selection in detection of uplink control channel formats. In an exemplary embodiment, an apparatus includes a dynamic acknowledgement (ACK) list allocation circuit that generates a dynamic ACK list that includes one or two most likely ACK candidates, and a top-Q candidate CQI bits detector that dynamically allocates a detection branch to each of the one or two most likely ACK candidates to detect top-Q candidate CQI bits. The apparatus also includes a merger circuit that mergers the top-Q candidate CQI bits detected for the one or two most likely ACK candidates to generate a merged list, a top-Q CQI symbol generator that generates top-Q CQI symbols for the top-Q candidate CQI bits detected for the one or two most likely ACK candidates, and a joint detector that detects transmitted CQI bits and ACK bits.

Abstract: Embodiments of the present invention disclose a polar polar code encoding and decoding method and an apparatus. The decoding method may include: obtaining a polar polar code a code length N of the polar polar; determining a survivor path quantity L of the polar polar code according to the code length N of the polar polar code and a signal-to-noise ratio SNR for receiving the polar polar code, where L is a positive integer; and performing successive cancellation list SCL decoding on the polar polar code according to the survivor path quantity L, to obtain L survivor paths, and checking at least one of the L survivor paths, to obtain a decoding result of the polar polar code. The present invention can address a prior-art disadvantage that decoding is rather complex because of a fixed survivor path quantity L for polar code decoding.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and UE are provided. The UE receive a configuration from a base station, the configuration indicating one or more constraints for constructing and transmitting a multiple-access signature. The UE then constructs the multiple-access signature in accordance with the one or more constraints. The UE autonomously transmits the multiple-access signature to the base station in accordance with the one or more constraints.

Abstract: Embodiments of the present application provide a data processing method. In the data processing method, before channel coding, a transmission control device divides a data flow into N sub-data flows, allocates the N sub-data flows to N transmit ends, and notifies the N transmit ends of a same time-frequency resource used for sending the allocated sub-data flows. By applying the technical solution, the N transmit ends can send different sub-data flows of a same data flow to a same receive end on the same time-frequency resource without a large amount of signaling interworking, and a system throughput can be improved without increasing network implementation complexity.

Abstract: The present disclosure relates to beam training sequence design methods and apparatus. One example method includes generating, by a transmit end, NT beam training sequences, where each beam training sequence includes a cyclic prefix and a Golay sequence with a length of 2×N×L, and the NT beam training sequences are orthogonal to each other, and sending, by the transmit end, the NT beam training sequences.

Abstract: A device includes a tuner configured to tune a broadcast signal; a pilot detector configured to detect pilots in the tuned broadcast signal; a de-framer configured to parse a signal frame of the broadcast signal, the signal frame carrying Physical Layer Pipe (PLP) data, the signal frame including a preamble and at least one subframe; and a decoder configured to decode the PLP data.

Abstract: Various embodiments disclosed herein provide for an improved system for selecting and conveying modulation scheme information for an uplink transmission. A network device can determine the channel state information for an uplink transmission based on sounding reference signals received from a user equipment device, and then select a modulation scheme for the uplink transmission based on the channel state information and associated signal to noise ratio. The network device can then send an indication of the selection to the user equipment device using an index number comprising six bits that correspond to an index number in a table of modulation schemes. The table of modulation schemes can include modulation schemes that use transform precoding, as well as modulation schemes that do not use transform precoding.

Abstract: Embodiments of the present disclosure discloses a method for enabling CSI feedback in Multiple Input Multiple Output (MIMO) wireless communication system comprising at least one user equipment (UE) and at least one base station (BS). The UE receives a plurality of downlink (DL) channel state information CSI from the BS and generate an explicit CSI from the received DL CSI. The UE determines a range of frequency domain values and channel state values from the received DL CSI. Upon determination, the UE performs IDFT to determine time domain channel impulse response matrices for the range of frequency domain values and perform CSI quantization. In another embodiment, the processor performs CSI quantization on either full range or a partial range of the time domain channel impulse response matrices to obtain optimized time domain channel explicit CSI and transmit the generated explicit CSI as a feedback to the one or more BS.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and wireless equipment are provided. The wireless equipment interleaves a first sequence of encoded bits output from an encoder and then manipulating the interleaved first sequence of encoded bits to generate a second sequence of encoded bits. The wireless equipment places the second sequence of encoded bits in a buffer. The wireless equipment selects, from the buffer, a first section of the second sequence of encoded bits for transmission. The wireless equipment interleaves the first section of encoded bits. The wireless equipment transmits the interleaved first section of encoded bits via one or more symbols.

Abstract: Methods, systems, and devices for wireless communication are described. In some systems (e.g., Wi-Fi systems), a transmitting device such as an access point (AP) or mobile station (STA), may identify a number of spatial streams for a data transmission that is less than a number of transmit antennas, and may transmit a packet over a channel. In a first implementation, the packet may be formatted in a multi-user frame format, with a number of long training field (LTF) symbols equal to the number of transmit antennas. In a second implementation, the packet may be a null data packet (NDP), and the device may transmit a separate data packet. In a third implementation, the packet may be formatted in single-user frame format with a modified LTF. A receiving device may receive the packet, and may perform channel estimation and power amplifier (PA) distortion cancellation based on the received packet.

Abstract: Wireless communications using multiple active resources (e.g., bandwidth parts (BWP)) are described. A predetermined rule may be used to determine on which downlink (DL) BWP of multiple active DL BWPs, and/or on which uplink (UL) BWP of multiple active UL BWPs, a message is to be sent. A wireless device and/or a base station may reduce the quantity of active DL BWPs and/or active UL BWPs to monitor for a response.

Abstract: A transmitter is configured to transmit at least one signal with a pilot sequence having a plurality of pilot symbols, wherein the transmitter has a signal generator, wherein the signal generator provides the pilot sequence, wherein the signal generator provides the pilot sequence such that the pilot sequence has at least two symbol groups each having at least two pilot symbols, and the symbol groups, when evaluating a signal received by a receiver as a result of the transmission of the signal with respect to a phase, the symbol groups generate phase errors that depend on a temporal off-set between a reference point in time of the transmission of the signal by the transmitter and a value assumed and/or estimated for the evaluation for the reference point in time, said phase errors essentially mutually compensating each other across the symbol groups in the evaluation.

Abstract: The present embodiments relate to a method for configuring a cyclic prefix for a next generation/5G radio access network (referred to as new radio (NR)) about which 3GPP has begun discussions. According to the present embodiments, a base station configures cyclic prefix (CP) lengths for secondary numerology except for reference numerology and sets, through RRC signaling, the values of the CP lengths configured for the secondary numerology, thereby enabling a terminal to detect the CP lengths for the secondary numerology in a cell supporting mixed numerology.

Abstract: A guard period for switching between uplink and downlink subframes is created by shortening a downlink subframe, i.e., by not transmitting during one or more symbol intervals at the end of the subframe. A grant message includes signaling indicating when a shortened sublimate is being transmitted. An example method is implemented in a receiving node configured to receive data from a transmitting node in subframes having a predetermined number of symbol intervals. In an LTE system, this receiving node may be a UE, and the subframes are downlink subframes. This example method includes determining that a received subframe is to be shortened, relative to the predetermined number of symbol intervals and, in response to this determination, disregarding a last part of the received subframe by disregarding one or more symbols at the end of the received subframe when processing the received subframe.

Abstract: Provided are an electronic device and method for use in a network control point and a central processing node. The electronic device for use in a network control point comprises a processing circuit. The processing circuit is used to acquire channel characteristic information of channels between a network control point and one or more neighboring network control points thereof and respective user equipment units, and to acquire service requirement information of the user equipment units served by the respective network control points. The current network control point and the neighboring network control points adopt joint precoding to perform downlink data transmission. The processing circuit determines, according to the service requirement information and the channel characteristic information, the number of transmitting antenna to be used by the network control point and the neighboring network control points.

Abstract: One aspect of the present disclosure provides a method for detecting, by a user equipment, a PDCCH signal, the method including: receiving configurations for a plurality of search space sets from a base station; determining, based on a monitoring periodicity of each of the plurality of search space sets, search space sets for which the user equipment should monitor a PDCCH signal for a specific unit time; and attempting blind-detection selectively for only a part of PDCCH candidates included in the determined search space sets when a number of PDCCH candidates or a number of CCEs included in the determined search space sets exceed a maximum number of candidates or a maximum number of CCEs, wherein in selection of PDCCH candidates for attempting the blind-detection, the user equipment firstly selects PDCCH candidates from a first search space set related to a CSS among the determined search space sets.

Abstract: The present invention provides a method and device for transmitting a positioning reference signal (PRS), and a computer storage medium. The method comprises: obtaining specified information related to transmission of a PRS, the specified information comprising at least one of a cycle, an offset, duration, subframe configuration information, and narrowband information; and determining a transmission resource for the PRS on the basis of the specified information, and transmitting the PRS by means of the transmission resource.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An embodiment of the present disclosure relates to a method for operating a terminal, which includes receiving timing advance (TA) information related to an interference, determining whether to apply the TA information related to the interference, and transmitting uplink data based on the TA information related to the interference, and the terminal performing the same. Further, the present disclosure relates to a method and an apparatus for operating a base station operating with the terminal.

Abstract: In accordance with embodiments, methods and systems for data transmissions are disclosed. A station (STA) transmits an orthogonal frequency division multiplexing (OFDM) frame to an access point (AP). The OFDM frame comprises an OFDM symbol. The OFDM symbol comprises data tones and pilot tones. The total number of the data tones and the pilot tones in the OFDM symbol is divisible by 4. In some embodiments, the OFDM symbol may comprises 232 data tones, 8 pilot tones, 5 direct current (DC) tones, and 11 edge tones. The 232 data tones and 8 pilot tones of the OFDM symbol may be segmented to a set of 15 blocks for channel estimation between the AP and the STA.

Abstract: A method and an apparatus for receiving broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, wherein the signal frame includes service data corresponding to each of a plurality of physical paths, a time deinterleaver to time deinterleave service data in each physical path by a TI (Time Interleaving) block, wherein the time deinterleaver further performs inserting at least one virtual FEC block into at least one TI block of the service data, wherein each TI block includes a variable number of FEC blocks of the service data, wherein a number of the at least one virtual FEC block is defined based on a maximum number of FEC blocks of a TI block and a decoder to decode the time deinterleaved service data.

Abstract: Methods, devices, and computer program products for improving training field design in packets with increased symbol durations are disclosed. In one aspect, a method of transmitting a packet on a wireless communication network is disclosed. The method includes transmitting a preamble of the packet over one or more space-time-streams, the preamble including one or more training fields configured to be used for channel estimation, the one or more training fields each comprising one or more symbols of a first symbol duration. The method further includes transmitting a payload of the packet over the one or more space-time-streams, the payload comprising one or more symbols of a second symbol duration, the second symbol duration greater than the first symbol duration.

Abstract: Methods and apparatus for transmitting Ethernet data along an Ethernet link with a BASE-T transceiver are disclosed. One exemplary BASE-T Ethernet transceiver includes an Ethernet data framing module having an input interface to receive Ethernet block data bits at a first data rate. Logic associates the Ethernet block data bits with an auxiliary bit and a number of zero bits. An error encoder is coupled to the logic to encode all of the data bits, auxiliary bit and zero bits into an error encoded transport frame having plural error check bits. A symbol mapper receives the error encoded transport frame and transforms the error encoded transport frame into multiple symbols. A transmitter coupled to the symbol mapper transmits the multiple symbols over an Ethernet link at one of a selection of symbol rates. The data rate of data transmitted over the Ethernet link is based on the number of zero bits.

Abstract: A communication method and a base station are provided, the method includes: determining, by a base station, a time length of a time domain scheduling unit, a downlink, a guard period and symbols occupied by an uplink, included in the time domain scheduling unit; generating length configuration information of the time domain scheduling unit according to the time length, the downlink, the guard period and the symbols occupied by the uplink; sending the length configuration information to a terminal through radio resource control signaling and/or downlink control information signaling, and informing the terminal of a length configuration of the time domain scheduling unit; implementing, by the base station, a communication with the terminal based on the length configuration. By utilizing the method, it is beneficial for the terminal to acquire time information of time domain resource scheduling, and utilization efficiency of time domain resources is improved.

Abstract: An encoder architecture for UF-OFDM is provided, in which samples are first processed sub-band wise, and then resorted for sub-carrier-wise processing. The sub-carrier processing may comprise separate processing for the two extremity parts of the base band signal corresponding to the transient state of the UF-OFDM data stream and for a core part of the base band signal corresponding to the non-transient state of the UF-OFDM data stream, and then concatenated to obtain a UF-OFDM data stream. In certain embodiments a first extremity part of the base band signal corresponding to the transient state of the UF-OFDM data stream is calculated directly, and the other extremity part inferred from the core part and the first extremity part. The core and extremity part processors may be implemented with filters adapted to multiply each sample by a respective filter coefficient. Modifying these coefficients can introduce a frequency shift or convert the encoder for OFDM encoding.

Abstract: A method for transmitting data in a multiple-input-multiple-output space-time coded communication using a mapping table mapping a plurality of symbols defining the communication to respective antennae from amongst a plurality of transmission antennae and to at least one other transmission resource. The mapping table may comprise Alamouti-coded primary segments and may also comprise secondary segments, comprising primary segments. The primary segments in the secondary segments may be defined in accordance to an Alamouti based code pattern applied at the segment level to define a segment-level Alamouti based code.

Abstract: A processor-implemented method and a controller in a vehicle for estimating a wireless channel impulse response in a mobile environment are provided. The method comprises: receiving an orthogonal frequency-division multiplexing (OFDM) signal; applying a maximum likelihood estimator to the received OFDM signal to identify a data symbol that provides a smooth channel response; and estimating the channel impulse response by performing a division or reverse convolution operation between the received OFDM signal and the identified data symbol. The controller is configured to: receive an OFDM signal; apply a maximum likelihood estimator to the received OFDM signal to identify a data symbol that provides a smooth channel response; and estimate the channel impulse response by performing a division or reverse convolution operation between the received OFDM signal and the identified data symbol. The vehicle can use the estimated channel impulse response to decode data symbols from future instances of the OFDM signal.

Abstract: Embodiments herein relate to a method performed by a receiving device for handling signalling in a wireless communication network. The receiving device measures a strength, or a complex amplitude, of one or more signals over a signal path to a transmitting device, which measured strength or complex amplitude forms a signal pattern over a time. Furthermore, the receiving device matches the signal pattern with a stored signal pattern and, if the signal pattern matches the stored signal pattern, the receiving device determines whether an object will block the signal path between the receiving device and the transmitting device.

Abstract: Cognitive radios by dynamically detecting available channels and changing their transmission or reception parameters allow increased concurrent wireless communications within a given spectrum band. It would be beneficial for such cognitive radios to exploit orthogonal frequency division multiplexing (OFDM) and accordingly establishing a spectrum monitoring technique suitable for OFDM-based cognitive radios an essential element for this. The inventors have established a technique allowing for the detection of the reappearance of the primary user within a reception period within an OFDM-based cognitive radio network and beneficially does so quickly without requiring received bit decoding and allows for different signal chain impairments to be considered. Further, the technique is applicable to address other important OFDM challenges for cognitive radios such as power leakage as well as extending the embodiments of the invention to multiple antenna systems.

Abstract: The present invention provides an apparatus of transmitting broadcast signals, the apparatus including, an encoder for encoding service data, a frame builder for building at least one signal frame by mapping the encoded service data, a modulator for modulating data in the built at lease one signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, scheme and a transmitter for transmitting the broadcast signals having the modulated data.

Abstract: Provided is a communication device configured to operate in a plurality of communication modes and maintain information related to retransmission of data in accordance with switching of the communication modes.

Abstract: An optical transmitter device includes a digital signal processor (DSP) having digital hardware. The DSP is operative to generate shaped bits from a first set of information bits, and to apply a systematic forward error correction (FEC) scheme to encode the shaped bits and a second set of information bits, where the first set of information bits and the second set of information bits are disjoint sets. Unshaped bits and the shaped bits are mapped to selected symbols or are used to select symbols from one or more constellations. The selected symbols are mapped to physical dimensions. Each unshaped bit is either one of the second set of information bits or one of multiple parity bits resulting from the FEC encoding. In this manner, a target spectral efficiency is achieved.

Abstract: A method for transmitting feedback information by a terminal may comprise: multiplying each of a left side and a right side of a matrix, which is related to a channel measured by the terminal, by a transformation matrix, so as to obtain a first matrix; performing a first transformation which transforms elements other than a predetermined number of elements having a larger size among elements of the first matrix to zero, or performing a second transformation which transforms elements other than elements exceeding a threshold value to zero, so as to obtain a second matrix; quantizing the second matrix so as to obtain a third matrix; configuring a vector by selecting a specific portion in the third matrix according to a predetermined pattern; configuring, into bits, an output obtained by multiplying the configured vector by a sensing matrix for compression sensing; and transmitting the output bits to a base station.

Abstract: The extension of NB-IoT and eMTC communications into the unlicensed spectrum introduces a number of problems associated with channel quality measurement and reporting. A method, apparatus, and computer readable medium are presented that provide a technique for channel quality measurement and reporting that addressed such problems. A UE apparatus measures a CQI measurement for each of a plurality of groups of hopping frequencies, wherein a set of hopping frequencies is grouped into the plurality of groups and reports a CQI for each of the plurality of groups. A base station may configure the UE for CQI reporting and may receive a CQI for each of a plurality of groups of hopping frequencies, wherein a set of hopping frequencies is grouped into the plurality of groups. The set of hopping frequencies comprise frequencies in an unlicensed spectrum.

Abstract: According to one embodiment, a system and computer-readable storage medium for storage of software directed to the management of associations between network devices is described. The computer-readable storage medium comprising instructions which, when executed by at least one hardware processor on a network device, causes performance of operations, comprising: (1) determining a desired operating state for a client device under analysis, the client device being associated with a first network device of a plurality of network devices; (2) detecting if a triggering event has occurred based on a comparison of the desired operating state for the client device under analysis to an actual operating state for the client device under analysis; and (3) in response to detecting that the triggering event has occurred, causing the client device to wirelessly connect to a second network device of the plurality of network devices in lieu of the first network device.

Abstract: Embodiments for managing temporal access to data by a processor. Permission for communicating with a user for providing temporal consent data during a selected time window based on a plurality of factors may be established. The temporal consent data may be delivered during the selected time window.

Abstract: A transmitting UE schedules radio frequency resources for use in a data transmission. The transmitting UE determines the transmission bandwidth, subject to certain restrictions, such as allowed DFT sizes for the UE for a data transmission. The determination may be performed through autonomous resource selection operations and/or may be performed using information received through signaling received from the network node as part of a scheduling grant. The UE further determines the ALLOCATED BANDWIDTH. The ALLOCATED BANDWIDTH can be determined based on the TRANSMISSION BANDWIDTH, which has been determined, using a defined rule. Furthermore, the UE generates and transmits toward a receiving UE a scheduling assignment (SA) that indicates the number or the set of subchannels that are within, and conform to, the ALLOCATED BANDWIDTH which was determined. The UE can then perform the data transmission using the SA indicated number or set of subchannels.

Abstract: Embodiments of the present invention provide a method and a system for measuring a channel quality indicator, a user equipment and a base station. The method includes: obtaining a channel quality indicator configuration, where the channel quality indicator configuration includes a first combination, and the first combination includes a valid signal processing manner and an interfering signal processing manner; performing valid signal processing and interfering signal processing according to the valid signal processing manner and the interfering signal processing manner in the first combination to obtain a valid signal and an interfering signal; performing channel quality indicator calculation according to the valid signal and the interfering signal to obtain a channel quality indicator; and feeding the channel quality indicator back to a base station.

Abstract: A transmitter reports channel quality information by partitioning channel quality values, based on a channel quality information reporting parameter, into at least two partitions corresponding to different frequency bands in a bandwidth associated with the communications system. A channel quality value of the channel quality values of at least one of the at least two partitions is encoded to obtain signaling information on channel quality, including at least one of first channel quality information and second channel quality information, based on the channel quality information reporting parameter, wherein the second channel quality information is different from the first channel quality information. The transmitter transmits the signaling information on the channel quality by reporting the first channel quality information or the second channel quality information at different reporting frequencies depending on the channel quality information reporting parameter.

Abstract: The present invention provides an apparatus of transmitting broadcast signals, the apparatus including, an encoder for encoding service data, a frame builder for building at least one signal frame by mapping the encoded service data, a modulator for modulating data in the built at lease one signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, scheme and a transmitter for transmitting the broadcast signals having the modulated data.

Abstract: A data communication method and a related apparatus are provided, and the data communication method includes: constructing, by an access device, a beacon frame, where the beacon frame includes a newly added field, and the newly added field represents multiple data guard interval lengths supported by the access device; and broadcasting, by the access device, the beacon frame, so that a terminal selects an available guard interval length matching a data guard interval length supported by the terminal from the beacon frame, and performs data communication with the access device by using the available guard interval length. By using the present invention, data communication between the access device and the terminal can be implemented when the access device supports multiple data guard interval lengths.

Abstract: To reliably exercise radio communication of calibration data. In order to achieve the above-described object, a balance (10) includes a weight sensor (12), a built-in weight (20) to be loaded on the weight sensor, an adding and removing unit (21) for the built-in weight, an arithmetic processing unit (14) configured to drive the adding and removing unit, and a radio communication device (41) connected to the arithmetic processing unit, wherein the arithmetic processing unit includes a radio wave environment check section (32) configured to check a radio wave environment, and a calibration execution section (33) configured to add or remove the built-in weight and issue a command to the radio communication device to transfer calibration data when the radio wave environment check section determines that the radio wave is good.

Abstract: An apparatus generating a packet of signals, a number of preamble signals of a preamble portion for each of a number of radio transmission units, and a number of data signals of a data portion, wherein a phase rotation in frequency domain is equal to a time shift in time domain is applied to each symbol of the number of preamble signals separately, the same phase rotation is applied to each symbol separately, the amount of the phase rotation is different for each preamble signal and each data signal, the amount of the phase rotation of one of the number of data signals and one of the number of preamble signals is both zero, and the amount of the phase rotation is equal between one of the preamble signals and one of the data signals for the same radio transmission unit.