Abstract: A data transmission method and apparatus are provided. The method includes: modulating, based on a codebook, every N information bits of to-be-transmitted data into one M-dimensional modulation symbol, where the codebook is generated based on an M-dimensional modulation constellation, the M-dimensional modulation constellation includes M modulation constellations, a constellation point in an mth modulation constellation in the M modulation constellations is obtained by mapping N information bits based on an mth information bit subset, the mth information bit subset includes information bits on some locations in the N information bits, and a union set of M information bit subsets respectively corresponding to the M modulation constellations is the N information bits, where M and N are integers greater than or equal to 2, and m is 1, 2, . . . , or M; and sending the generated M-dimensional modulation symbol. The technical solutions can reduce complexity when a modulation signal is demodulated.

Abstract: A wireless transceiver including: antennas, components forming transmit and receive chains coupled to the antennas for MIMO communications, voltage sources, power amplifier supply voltage detectors and regulated switches. The components forming the transmit chains include power amplifiers (PA)s each coupled to a corresponding one of the transmit chains for amplifying RF signals of a MIMO communication link and each PA having a supply voltage input. The PA supply voltage detectors each couple to an associated one of the transmit chains to detect changes in an amplitude of the signal thereon and to identify required changes in the supply voltage level of the corresponding PA for transmission of the signal. The regulated switches couple the voltage sources and PAs, and are responsive to each PA's supply voltage detector to switchably couple the supply voltage input of each PA to the voltage sources providing the identified voltage levels during transmission.

Abstract: Methods, devices and systems for synchronizing actions taken by digital devices in a group wherein the digital devices to use a flocking protocol to establish time or behavior synchronization between individual digital devices within the group. The flocking protocol includes the transmission of synchronization information from one device to neighboring devices within the group and the processing/use of such synchronization information by the devices to synchronize the timing and/or other characteristics of their actions.

Abstract: A communication device is provided that includes a receiver configured to receive a signal. The communication device further includes a determination circuit configured to determine an interference estimation signal of the received signal based on a first signal sample of the received signal and on an interference signal model. The communication device further includes a correction circuit configured to determine a corrected interference estimation signal based on the determined interference estimation signal and on a second signal sample of the received signal. The communication device further includes a subtraction circuit configured to subtract the corrected interference estimation signal from the received signal.

Abstract: A system for serializing input data signals and generating an output data signal includes a FIFO memory that launches the input data signals at different phases of a clock signal. The system further includes multiple stages of a serializer circuit, and each stage of the serializer circuit receives a clock signal. Each successive stage includes half the number of serializer circuits that are included in the previous stage, and each successive stage is clocked by a clock signal that transitions at twice the frequency of the previous stage clock signal. The serializer circuits that belong to a single stage receive the clock signal with different phase. The phase and frequency of clock signals of serializer stages are adjusted such that a launched input data signal is outputted as the output data signal. Further, a critical path for each serializer circuit is equal to full clock cycle of the clock signal.

Abstract: According to one example, a communication method is described comprising receiving a message from a sender transmitted in each of a plurality of transmit antenna main beam directions and determining reception qualities of the messages. The method further comprises identifying a subset of a plurality of transmit antenna main beam directions based on the reception qualities of the messages, wherein the subset includes multiple transmit antenna main beam directions of the plurality of transmit antenna main beam directions, performing, for each transmit antenna main beam direction of the subset, a beam training procedure to determine an antenna weight vector for the transmit antenna main beam direction and performing a communication based on one of the determined antenna weight vectors.

Abstract: Systems and methods for codebook restriction for closed-loop codebook-based precoding in a Multiple-Input-Multiple-Output (MIMO) wireless communications system based on antenna correlation are disclosed. In some embodiments, a method of operation of a wireless device to provide feedback for a closed-loop codebook-based precoding system is provided. The method comprises determining a codebook restriction based on an antenna correlation for a MIMO channel between a network node and the wireless device. The antenna correlation is transmit antenna correlation, receive antenna correlation, or both transmit and receive antenna correlation. The codebook restriction is a restriction that reduces a full codebook of the wireless device to a reduced codebook. The method of operation of the wireless device further comprises generating a feedback report using the reduced codebook and transmitting the feedback report to the network node.

Abstract: A radio frequency signal generation device may include an optical comb generator configured to generate an optical comb signal including a plurality of first wavelength signals having different wavelengths; a pulse shaper configured to attenuate remaining wavelength signals excluding a plurality of second wavelength signals among the plurality of first wavelength signals; an optical-electronic converter configured to generate a radio frequency signal including a carrier frequency signal from the plurality of second wavelength signals outputted from the pulse shaper; and a pulse shaping controller configured to control the pulse shaper such that a carrier frequency of the carrier frequency signal varies according to a frequency hopping pattern.

Abstract: Embodiments of the present application disclose a spreading method, a spreading control method, and apparatuses thereof. The spreading method comprises: determining a first combined spreading code to be used at least according to first information associated with spreading by using combined spreading codes, the first combined spreading code comprising N spreading codes, and N being an integer not less than 2; and spreading N data units by using the first combined spreading code, wherein the N data units comprise at least one first unit and at least one second unit, the at least one first unit comprises data to be sent, and the at least one second unit is configured to recover the at least one first unit. The methods and apparatuses of the embodiments of the present application can effectively solve the problem of insufficient number of orthogonal spreading codes by using combined spreading codes.

Abstract: A data property recognition apparatus, includes a storage unit; a model data acquisition processor acquiring a plurality of model sets of data entries, each data entry individually representing an identified property common to the model set and being of a data type common to the model set; a feature vector generation processor receiving an input set of data entries, recognizing a data type common to the input set of data entries from among a plurality of supported data types, selecting a set of statistical characteristics representing the input set of data entries in dependence upon the recognised data type, generating a value of each of the selected set of statistical characteristics from the input set of data entries, and outputting a feature vector composed of the generated values of statistical characteristics.

Abstract: A System-on-a-Chip (SoC) for receiving telemetry messages over a radio-frequency (RF) channel is provided. The SoC comprises at least one RF module; at least one module for conversion of the signal from an analog form to a digital form; at least one input signal digital processing unit for filtering the signal from the RF module; and at least one memory unit. The SoC also comprises at least one processor for executing time shifting and frequency shifting of the signal. The processor is configured to process each time- and frequency-shifted signal by consecutive Fourier transforms, such that a first time element of each next transform is placed immediately after a last element of a previous transform. The processor is also configured to receive the signal, which signal was subjected to a carrier frequency change during transmission thereof, the signal having transmission frequencies that are within at least two processed spectrum sections.

Abstract: A configurable radio frequency system. The system includes: a plurality of radio frequency cells connected in a cascade. Each of the radio frequency cells includes an input switch connected to an input of the radio frequency system, an output switch connected to an output of the radio frequency system, and a plurality of elements, each of the elements being connected between the input switch and the output switch. The input switch and the output switch are configured, depending on their respective settings, to cause a radio frequency signal path from an input of the cell to an output of the cell to include one of the elements. The plurality of elements in each cell includes a band pass filter, an attenuator, a through path, an amplifier, and a mixer.

Abstract: A method to receive telemetry messages over an RF channel, the method implemented by a system on a chip, in which a signal is received from the output of an input RF module, the received signal is offset in time and frequency wherein the signal, at first, is offset in time so that the offset magnitudes uniformly fill the length of one data bit, then, the signal is offset in frequency so that the offset magnitudes uniformly fill the space between the Fourier transform subcarriers, with the frequency offsets being independent of the time offsets; each signal processed at the preceding step is subjected to sequential Fourier transforms, with the first time element of each next transform immediately following the last element of the preceding transform; all messages are demodulated independently. The technical result consists in that messages can be received over multiple channels at multiple rates.

Abstract: What is disclosed is a method for wireless communication comprising receiving a wireless communication via a receiver of the mobile communication device, deriving a demodulation reference signal from a first plurality of symbols of the wireless communication; creating a channel estimation matrix using the demodulation reference signal; inverting the channel estimation matrix to obtain a channel pseudo-inverse matrix; deriving a tracking reference signal from a second plurality of symbols of the wireless communication; calculating a phase shift for one or more additional symbols based on the tracking reference signal; determining a corrected channel pseudo-inverse matrix for the one or more additional symbols by adjusting the channel pseudo-inverse matrix according to the calculated phase shift; and controlling the receiver to accomplish data detection using the corrected channel pseudo-inverse matrix on one or more orthogonal frequency division multiplexing subcarriers.

Abstract: A method of recovering information encoded by a modulated sinusoidal waveform having first, second, third and fourth data notches at respective phase angles, where a power of the modulated sinusoidal waveform is reduced relative to a power of an unmodulated sinusoidal waveform within selected ones of the first, second, third and fourth data notches so as to encode input digital data. The method includes receiving the modulated sinusoidal waveform and generating digital values representing the modulated sinusoidal waveform. A digital representation of the unmodulated sinusoidal waveform is subtracted from the digital values in order to generate a received digital data sequence, which includes digital data notch values representative of the amplitude of the modulated sinusoidal waveform within the first, second, third and fourth data notches. The input digital data is then estimated based upon the digital data notch values.

Abstract: The present invention is directed to data communication. In a specific embodiment, a known data segment is received through a data communication link. The received data is equalized by an equalizer using an adjustable equalization parameter. The output of the equalizer is sampled, and a waveform is obtained by sweeping one or more sampler parameters. The waveform is evaluated by comparing it to the known data segment. Based on the quality of the waveform, equalizer parameter is determined. There are other embodiments as well.

Abstract: A method and apparatus are provided. The method includes receiving a reference signal from a transceiver, estimating a time offset (TO) of the reference signal in the frequency domain based on an accumulation of subcarriers before cross-correlation, providing a TO compensated signal of the reference signal based on the estimated TO in the frequency domain, transforming the TO compensated signal into the time domain, and estimating a frequency offset (FO) based on the time domain TO compensated signal.

Abstract: A method implemented in a wireless network element (NE), comprising obtaining, via a processor of the wireless NE, a plurality of encoded signals associated with a plurality of downstream (DS) channels in a wireless communication network, wherein the plurality of DS channels form a plurality of DS multiple-input and multiple-output (MIMO) groups, performing, via the processor, MIMO pre-coding on the plurality of encoded signals according to the plurality of DS MIMO groups to produce MIMO pre-coder output signals of the plurality of DS MIMO groups, performing, via the processor, a crosstalk pre-coding across the MIMO groups using a crosstalk pre-coding matrix on the MIMO pre-coder output signals of the plurality of DS MIMO groups to produce a plurality of output signals, with the crosstalk pre-coding matrix computed according to a first DS channel matrix and a DS MIMO channel matrix, wherein the first DS channel matrix comprises first diagonal entries representing first direct channel estimates of the pluralit

Abstract: The present disclosure discloses that a device uses precoding to transmit independent data streams to existing users and additional independent data streams to one or more new users simultaneously. During a first transmission of a first one or more data streams that are precoded using a first precoding matrix, the device determines to transmit a second one or more data streams in a second transmission. Before the first transmission is complete, the device calculates a combined precoding matrix for precoding the first one or more data streams and the second one or more data streams. The device transmits the first one or more data streams in the first transmission and the second one or more data streams in the second transmission simultaneously using the combined precoding matrix.

Abstract: The present disclosure relates to a network information analysis in a wireless communication system, and an analysis method comprises the steps of: receiving information on channel quality measured by a terminal; and outputting information on whether a carrier aggregation (CA) coverage mismatch occurs at a location where the channel quality has been measured, which is determined on the basis of the information on the channel quality. Further, the present disclosure comprises other embodiments as well as the above-descried embodiment.