Abstract: Embodiments of methods and systems for operating a communications device are described. In an embodiment, a method for operating a communications device that communicates via inductive coupling involves adjusting a phase configuration of the communications device in response to at least one system or environmental parameter, modulating a carrier signal with the adjusted phase configuration using active load modulation (ALM), and transmitting the modulated carrier signal from the communications device for inductive coupling.

Abstract: Signal extrication of a pair of quadrature amplitude modulated signals of a particular carrier frequency and phase constant by equally splitting all input signals into two independent circuit paths that contain identical components but one independent circuit path performs a complementary signal processing function with respect to the other resulting in a counterbalance between the two paths, canceling all output signals with the exception of said pair of quadrature amplitude modulated signals which are not canceled because of the singular signal nullification property of a product detector circuit that is a component in each of said independent circuit paths.

Abstract: Phase noise estimation and cancellation as disclosed herein may allow cost-efficient increase of capacity in communications by enabling very high QAM levels. The proposed solution is potentially applicable to any single carrier applications where phase noise is a limiting factor and a required order of modulation is very high. For example, disclosed embodiments may enable high QAM levels for microwave backhauls despite severe phase noise sensitivity. One embodiment involves a pilot-aided and BCJR-based sequential search algorithm that accurately estimates and subtracts fast-varying phase noise symbol-by-symbol. Residual BER performance is evaluated under the most challenging phase noise scenarios. FPGA emulation results show detection and removal of a significant amount of phase noise and zero BER performance even for complex 1K-QAM and above.

Abstract: A 5G base station transmitter at least partially precodes data for beam forming, and generates digital precoded baseband signals. Cross product circuitry coupled to the digital precoder, generates digital cross products of the digital precoded baseband signals. Both the baseband signals and the cross products are put through digital-to-analog converters (DACs), then provided to an analog non-linear precoder. The analog non-linear precoder combines the analog baseband signals, the cross products, with pre-distortion and precoder coefficients to generate a signal that is pre-compensated for power amplifier non-linearity. The pre-compensated signal is amplified by the power amplifier and transmitted via a phased antenna array. The number of extra DACs required for inserting pre-distortion when a hybrid digital/analog precoder is used can be limited to approximately N RF ? ( N RF - 1 ) 2 , where NRF is the number of outputs of the digital precoder.

Abstract: A broadcast signal transmitter is disclosed. A broadcast signal transmitter according to an embodiment of the present invention comprises an input formatting module performing baseband formatting and outputting at least one Physical Layer Pipe (PLP) data; a BICM module error-correction processing the PLP data; a framing & interleaving module interleaving the PLP data and generating a signal frame; and a waveform generating module inserting a preamble into the signal frame and generating a broadcast signal by performing OFDM modulation.

Abstract: A wireless transmitter processing chain includes digital radio frequency mixing circuitry to generate, in digital form, a representation of a transmit signal including multiple communication channels. From the digital representation, a wideband digital to analog converter creates the analog transmit signal that includes the communication channels. Individual mixers and filters follow, with mixing frequencies tuned to place the communication channels at the desired frequency centers.

Abstract: A transmission apparatus for a wireless device, comprising: an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device; a variable impedance coupled to the antenna, the variable impedance having an impedance value; a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal; and, a decoder coupled to the delta-sigma modulator for generating the impedance value from the information.

Abstract: Described is an apparatus which comprises: a time-to-digital converter (TDC) to receive a reference clock and a feedback clock, wherein the TDC is to generate a digital output code representing a time difference between the reference clock and the feedback clock; a circuitry to apply a digital code to an output of the TDC; and a node to receive the digital output code from the TDC and the digital code from the circuitry, wherein the circuitry is to monitor the digital output code and to control the TDC according to at least the monitored digital output code.

Abstract: A reduced-overhead channel estimation method and system thereof for massive MIMO systems is provided in present application. The method is applied in a base station device, and includes following steps: first, enabling the base station device to acquire a plurality of channel matrixes between the base station device and one or a plurality of external user devices, then enabling the base station device to label the positions of a non-zero coefficient and a common support coefficient in a plurality of fields of the channel matrixes, and then enabling the base station device to configure the non-zero coefficient and the common support coefficient to have the weights different from the weights of the coefficients in the other fields in the channel matrixes so as to provide estimating channel matrixes.

Abstract: A method and an apparatus for encoding, transmitting, and receiving signaling information in a broadcasting/communication system are provided. The method includes generating the signaling information which comprises a plurality of pieces; determining a number of coded blocks to which the signaling information is to be encoded, based on a number of bits of the signaling information and a number of encoder input information bit; segmenting each piece of the signaling information based on the number of the coded blocks; constructing input information bits of each coded block to include segmented parts of each piece of the signaling information; encoding the input information bits to each coded block; and transmitting each coded block.

Abstract: Aspects of the subject disclosure may include, for example, a transmission device that includes at least one transceiver configured to modulate data to generate a plurality of first electromagnetic waves in accordance with channel control parameters. A plurality of couplers are configured to couple at least a portion of the plurality of first electromagnetic waves to a transmission medium, wherein the plurality of couplers generate a plurality of second electromagnetic waves that propagate along the outer surface of the transmission medium. A training controller is configured to generate the channel control parameters based on channel state information received from at least one remote transmission device. Other embodiments are disclosed.

Abstract: Methods and apparatus for generating a standard pattern for data signals from a set of multiple data signals are provided. The standard pattern consists of a signal length, a centerline, an upper limit, and a lower limit. One of methods comprises, receiving first and second data signals, determining a standard pattern length for each of the first and second data signals, sampling each of the first and second data signals by as much as the determined standard pattern length, aligning the sampled first and second data signals, and generating a standard pattern for the first and second data signals by overlapping the aligned first and second data signals, wherein the generated standard pattern is a standard pattern having reflected thereinto upper and lower limit ranges that are determined using levels of the aligned first and second data signals.

Abstract: Technologies are generally described herein for bandwidth amplification using a pre-clock signal to latch data at a latch in an input register of a sender section while passing the data through a multiplexer of the sender section in a serial manner. In some configurations, pre-clocking the multiplexer can allow for parallel operations to occur within the sender section, thus hiding or reducing the effects of certain serialization delays associated with the multiplexer. Furthermore, the pre-clocking of the multiplexer, in some configurations, hides or reduces the register latch hold and setup delays. A method may create three levels of parallelization of latencies between a sender circuit, a serialization circuit, and a receiver circuit by overlapping them at same time.

Abstract: Described is an apparatus which comprises: a first capacitor coupled to a first input pad; a second capacitor coupled to second input pad; a first resistor coupled to the second capacitor; a third capacitor coupled in series with the first resistor; a second resistor coupled in series with the third capacitor and also coupled to the first capacitor; and a differential amplifier coupled to the first and second capacitors and to the first and second resistors.

Abstract: A receiving apparatus based on pattern/polarization beam division multiple access (BDMA) including an antenna configured to receive a reference signal related to at least one of patterns and polarizations of a plurality of antennas included in a transmitting apparatus, and configured to transmit channel information, and a controller configured to select a particular antenna group among a plurality of antenna groups that are grouped from the plurality of antennas included in the transmitting apparatus using the reference signal, and configured to generate the channel information corresponding to the particular antenna group.

Abstract: A driver circuit includes a plurality of output circuits coupled in parallel between a differential input and a differential output and having a first common node and a second common node. Each of the plurality of output circuits includes a series combination of a pair of inverters and a pair of resistors, coupled between the differential input and the differential output; first source terminals of the pair of inverters coupled to the first common node; and second source terminals of the pair of inverters coupled to the second common node. The driver circuit further includes a first voltage regulator having an output coupled to the first common node of the plurality of output circuits; a second voltage regulator having an output coupled to the second common node of the plurality of circuits; and a current compensation circuit coupled between the outputs of the first voltage regulator and the second voltage regulator.

Abstract: A method and system for measuring a device under test are disclosed. In some embodiments, a method of implementing a measurement system is provided. The method includes providing a plurality of nodes, each node including a combination of a communication tester configured to generate a communication signal and a channel emulator configured to emulate a channel, and providing a user interface configured to enable a user to control at least one of the plurality of nodes.

Abstract: An industrial wireless communications system includes a PLC that performs at least monitoring within an industrial facility, at least one master wireless device connected to the PLC by a fieldbus, a plurality of slave wireless devices, which are installed corresponding to respective hardware devices, and carry out wireless communications with the master wireless device, a connection processing unit that carries out a connection process wirelessly between the master wireless device and the slave wireless devices, and a transmission/reception processing unit that transmits and receives data wirelessly between the master wireless device and the slave wireless devices.

Abstract: The present invention relates to a wireless communication system, and more particularly, to a downlink signal transmission and reception method and device taking into account antenna port relationship. A method for the reception of a physical downlink shared channel (PDSCH) signal by a terminal in a wireless communication system, according to one embodiment of the present invention, can comprise: a step for determining a start symbol index for the PDSCH in a downlink subframe; and a step for receiving the PDSCH signal on the basis of the start symbol index. The PDSCH start symbol index (k) when the downlink subframe belongs to a specific subframe set is determined according to k=min(KThreshold, K), KThreshold being a prescribed threshold, K being the PDSCH start symbol index when the downlink subframe does not belong to the specific subframe set, and min(KThreshold, K) being the minimum value among KThreshold and K.

Abstract: A demodulator is configured to demodulate a modulated signal responsive to a first carrier signal. The demodulator includes a filter and a bandwidth adjusting circuit. The filter is configured to filter a first signal. The first signal is a product of the first carrier signal and the modulated signal. The filter has a bandwidth adjusted based on a set of control signals. The bandwidth adjusting circuit is coupled to the filter, and configured to generate the set of control signals based on at least a frequency of the filtered first signal and a frequency of the first signal. The bandwidth adjusting circuit includes a frequency detector configured to generate a second signal based on a frequency relationship between the frequency of the filtered first signal and the frequency of the first signal.