Abstract: A method of suppressing interference in a communication sent over a channel includes assessing characteristics of channel-induced distortion in a channel, and applying pre-distortion to a signal sent over the channel. The pre-distortion is based on the assessed characteristics of the channel-induced distortion.

Abstract: In aspects of a common mode sense circuit for use at a chip's differential pins, a common mode sense circuit sums signals from a pair of connections comprising a twisted-pair cable differential connection. Differential connections are at an input of a chip, such as at an input to a receiver. Summed signals represent sensed common mode signals and may be further processed, such as summing the sensed common mode signals together, and supplied as a reference signal to an adaptive interference canceller.

Abstract: Components, systems, and methods for reducing location-based interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration are disclosed. Interference is defined as issues with received MIMO communications signals that can cause a MIMO algorithm to not be able to solve a channel matrix for MIMO communications signals received by MIMO receivers in client devices. These issues may be caused by lack of spatial (i.e., phase) separation in the received MIMO communications signals. Thus, to provide phase separation of received MIMO communication signals, multiple MIMO transmitters are each configured to employ multiple transmitter antennas, which are each configured to transmit in different polarization states. In certain embodiments, one of the MIMO communications signals is phase shifted in one of the polarization states to provide phase separation between received MIMO communication signals.

Abstract: A method for operating a device for power line communication includes measuring noise on the power line and detecting noise timing properties. Further, a method for adapting power line communication to detected noise timing properties, which may be asynchronous to the AC mains signal, includes adapting parameters for encoding a data stream and/or transmission parameters according to the detected noise timing properties and/or transmission timing information derived from the detected noise timing properties, encoding a data stream according to the adapted parameters for encoding, and transmitting the encoded data stream to the power line on at least one power line communications channel according to the adapted transmission parameters.

Abstract: In a method, an apparatus and a system for data transmission, a plurality of transmitters are provided, which operate according to a communications standard for data transmission with a bandwidth that is higher than the transmission bandwidth. The transmitter is adapted to the transmission bandwidth, and the plurality of the adapted transmitters are allocated to different carrier frequencies in the transmission bandwidth for parallel data transmission.

Abstract: Embodiments herein describe a reference-less CDR circuit that receives electrical signals that may have been transmitted along either an electrical or optical interconnect which are then processed to identify the original data. To do so, the CDR circuit includes a frequency locking loop (FLL) and a phase locking loop (PLL) which generate control signals for a voltage controlled oscillator (VCO). In one embodiment, the FLL generates a coarse adjustment signal which the VCO uses to output a recovered clock that substantially matches the frequency of the received electrical signal. The PLL, on the other hand, generates a fine adjustment signal which the VCO uses to make small adjustments (e.g., half cycle phase shifts) to the recovered clock. The recovered clock outputted by the VCO is then fed back and used as an input in both the FLL and the PLL.

Abstract: A system and method to optimize a multiple-input multiple-output signal processing RF communication system that includes obtaining, by a processor, at the receiver, during spatial processing, metrics from the channel stream. The metrics include a spatial correlation metric representing spatial coupling between multiplexed streams in the channel stream, a signal-to-noise power ratio metric representing propagation losses encountered by the signal, and a cross polarization discrimination metric representing whether polarization modes can be processed as independent groups. The processor obtains these metrics based on obtaining geometric information related to the receiver and the transmitter. Predictive methods may be employed to determine expectations for some metrics in advance. The method includes applying a policy with at least one objective of the system, and based on at least one metric and the policy, applying at least one adaptation to at least one of: the receiver or, the transmitter.

Abstract: A method for reducing far-end crosstalk in a digital line system is provided. The method includes receiving a noise related value fed back from a first receiving end to a first transmitting end over a first line. The method further includes pre-coding, a first signal and crosstalk source signals according to values of filtering parameters to form a synthesized signal corresponding to the first line. The crosstalk source signals are related to second signals over a second line. The method further includes transmitting the synthesized signal from the first transmitting end to the first receiving end over the first line. A corresponding device for reducing far-end crosstalk in a digital line system is provided.

Abstract: An example automatic gain control (AGC) circuit includes a base current-gain circuit having a programmable source degeneration resistance responsive to first bits of an AGC code word. The AGC circuit further includes a programmable current-gain circuit, coupled between an input and an output of the base current-gain circuit, having a programmable current source responsive to second bits of the AGC code word. The AGC circuit further includes a bleeder circuit, coupled to the output of the base current-gain circuit, having a programmable current source responsive to logical complements of the second bits of the AGC code word. The AGC circuit further includes a load circuit coupled to the output of the base current-gain circuit.

Abstract: In embodiments, apparatuses, methods, and storage media may be described for reducing the overhead associated with the transmission of channel training signals from an eNodeB (eNB) of a wireless network. Specifically, the eNB may receive feedback from a user equipment (UE) regarding the received signal energy of a first and second beamformed signal produced with a first and second beamforming vector, respectively. The eNB may identify, based on the feedback of the received signal energy, a signal subspace and a null subspace. The eNB may then transmit a channel training signal to the signal subspace.

Abstract: A receiver for signals. The receiver comprises, an amplifier arranged to receive and amplify the signals received by the receiver. The receiver also comprises a linearizer arranged to linearize the amplitude value of the output signals from the amplifier. In the receiver, the linearizer is arranged to perform the linearizing by means of determining actual and desired values of a statistical function for the amplitude values of the output signals from the amplifier and to replace the amplitude values of the output signals from the amplifier with amplitude values which have the same desired values of the statistical function. In embodiments of the receiver, the statistical function is the cumulative distribution function.

Abstract: A method is provided for receiving an OQAM multi-carrier signal, which implements a step of estimating, in the time domain, at least one time, phase, and/or frequency shift of the multi-carrier signal. The estimation step implements at least one estimator in order to estimate the time shift, referred to as a time estimator, and/or at least one estimator for estimating the phase shift, referred to as a phase estimator, and/or at least one estimator for estimating the frequency shift, referred to as a frequency estimator. The multi-carrier signal includes at least one preamble, and at least one of the estimators takes into account coefficients of a prototype filter used in transmission in order to shape at least one preamble inserted into the multi-carrier signal.

Abstract: An automatic frequency control device, a method for automatic frequency control, a receiver, a mobile station and a non-transitory computer-readable digital storage medium are provided. The automatic frequency control device may include a quality calculation unit to calculate quality of a received signal, a state machine controller to generate a control signal based on the calculated quality of the received signal, and a filter to filter an estimated frequency offset of the received signal based on the control signal.

Abstract: A system for storing pre-distorted output samples in a memory includes a sample counter, a programming interface module, and a comparator. The sample counter counts the pre-distorted output samples, generates a dynamic count value, receives a capture counter status signal, and generates a first count value. The programming interface module receives and outputs the first count value, an offset value, and a capture control signal, and generates a first interrupt signal. The comparator receives the first count value, the offset value, the dynamic count value, and the capture control signal, generates a final value, compares the final value with the dynamic count value, and generates a trigger signal when the final value equals the dynamic count value based on the capture control signal. The trigger signal initiates the storing of the pre-distorted output samples in the memory.

Abstract: A receiver estimates a vector of emitted symbols over a MIMO transmission channel which is emitted by emitting antennas. The receiver receives a vector of received symbols on receiving antennas. Estimation of the vector of emitted symbols is made by calculating a metric associated with a criterion for each vector of a subset of all possible vectors of emitted symbols and selecting an estimation for said vector of emitted symbols as the vector of emitted symbols among said subset which minimizes said metric.

Abstract: A method and apparatus for a channel feedback by a signal transmitting device in a Multiple Input Multiple Output (MIMO) system are provided. The method includes transmitting a pilot in which a compression rate is reflected to a signal receiving device; receiving channel related information on a compressed channel from the signal receiving device; and performing a precoding based on the channel related information. The apparatus includes a transmitting unit configured to transmit a pilot to which a compression rate is reflected to a signal receiving device; a receiving unit configured to receive channel related information on a compressed channel from the signal receiving device; and a precoding unit configured to perform a precoding based on the channel related information.

Abstract: A transmitter device includes a processing unit and a compression unit. The processing unit obtains a branch of data and partitions the branch of data into a plurality of snippets. Each snippet includes a group of data. The compression unit compresses each snippet into a plurality of packets according to value of each datum included in the corresponding snippet. The compression unit compares the value of each datum with a first threshold value to generate a first packet. The first packet includes first information indicating which data included in the corresponding snippet has the corresponding value not equal to the first threshold value. The compression unit further generates the remaining packets according to the first information.

Abstract: A method and apparatus for mitigating a phase anomaly in an analogue-to-digital converter (ADC) output signal is disclosed. A plurality of codewords output by the ADC are received and information about an estimated level of interference between an output of the ADC and an input of the ADC due to the codeword is obtained for each codeword based on the logic values of bits in the codeword. In-phase (I) and quadrature (Q) corrections are obtained based on the information about the estimated level of interference, and applied to I and Q values obtained from the ADC output signal.

Abstract: There is provided an apparatus allowing waveform shaping even at a low sampling rate, which includes a sampling unit, an equalizing unit, a tap coefficient calculating unit, a delay adjusting unit, a peak monitoring unit, and a timing value extracting unit. The timing value extracting unit provides a magnitude of a delay to the delay adjusting unit, and from a plurality of sets of the magnitude of the delay provided by the delay adjusting unit and maximum values of output signal intensity acquired by the peak monitoring unit, acquires the magnitude of a delay where the output signal intensity becomes the greatest, as a suitable delay amount, and notifies the delay adjusting unit of the suitable delay amount.

Abstract: A filter bank multi-carrier (FBMC) receiver implementing a synchronization in the frequency domain. The receiver includes a synchronization module including an error estimator on the sampling instants and, for each subcarrier, an interpolating filter for reconstructing the samples at the accurate sampling instants. A phase-shifter is provided, for each subcarrier, at the output of the interpolating filter, to make a phase compensation. The phase-shifter can be followed by an equalizer in the frequency domain.