Abstract: A power line communication modem is provided, including a connection element configured to connect the power line communication modem to at least three wires of a power line network; a transmitter configured to transmit a first signal via a first combination of at least two wires of the at least three wires and to transmit a second signal via a second combination of at least two wires of the at least three wires; a controller adapted to individually control a transmit power of the first signal and the second signal. A corresponding power line communication system and a power line communication method are provided as well.

Abstract: A spatio-temporal signal monitoring system includes a sampler configured to receive a radio frequency signal and obtain first compressive sensing measurements of said received signal at a first resolution level, and a signal detector configured to identify at least one signal of interest based on said first compressive sensing measurements and perform second compressive sensing measurements on said at least one signal of interest at a second resolution level, said second resolution level being higher than said first resolution level. The received signal may be analyzed as an array or image having two or more dimensions, based on frequency and on at least one other parameter, such as angle-of arrival, and may be analyzed at a higher level of resolution at the frequencies and angles corresponding to a signal of interest (SOI). Estimates of the frequency and/or the at least one other parameter may be generated by the system.

Abstract: Methods, systems, and devices are described for adaptively or dynamically tuning a radio frequency (RF) local oscillator (LO) for wireless communications. In one example, a radio may receive an RF signal and the LO of a radio may be tuned to a frequency that is an offset from its reception (RX) center frequency to deal with interference from another signal, such as one being transmitted using a different radio access technology (RAT) than that of the radio. The offset may be determined based upon an effect of the tuning on an attribute of the RF signal. In addition, the offset may be determined based on interference caused by the other signal.

Abstract: In one example embodiment, a method for reducing an effect of an interference signal on data being transmitted over a communication channel includes determining, by a processor, a code word based on at least an information vector and an interference vector, the information vector representing the data, the interference vector representing the interference signal. The method further includes determining, by the processor, a code vector based on the determined code word. The method further includes generating, by the processor, a transmit vector based on the code vector and the interference vector.

Abstract: A hybrid digital and analog beamforming device for a node operable with an antenna array is disclosed. In an example, the hybrid digital and analog beamforming device can include computer circuitry configured to: Segment antenna elements of an antenna array into at least two groups of antenna elements; map antenna ports for transmission chains to one group of the antenna elements; constrain digital precoding weights for a digital precoder for the antenna elements, where the digital precoding weight includes a digital phase and amplitude; and determine analog precoding weights for an analog precoder for the antenna elements, where the analog precoding weight includes an analog phase.

Abstract: An interface between an application processor device and a modem device uses virtual local-area network (VLAN) tagging of Ethernet frames. An example modem device includes a first interface circuit configured to communicate with a remote device, a second interface circuit configured to communicate with an application processor circuit , and a processing circuit configured to: provide the application processor circuit with IP-based data communications to and from at least one remote IP network using Ethernet frames exchanged between the application processor circuit and the modem device; provide the application processor circuit with local modem services, using Ethernet frames exchanged between the application processor and the modem device; and distinguish between Ethernet frames for the local modem services and Ethernet frames for the IP-based data communication to and from the remote IP network using differing VLAN identifiers attached to or included within the respective Ethernet frames.

Abstract: A heterodyne receiver structure comprises a frequency conversion block arranged to convert an incoming analog radio frequency (RF) signal to an analog intermediate frequency (IF) signal; a filter block arranged to filter said analog IF signal; and an analog-to-digital (AD) converter block arranged to convert said filtered analog IF signal to a digital signal, wherein the AD converter block (309) is arranged to convert the filtered analog IF signal to the digital signal by using a sampling frequency (fs) which is at least N times a maximum bandwidth of the filtered analog IF signal, wherein the frequency spectrum from zero to the sampling frequency is divided into N frequency zones of equal width, wherein N is an even positive number higher than two; the frequency conversion block (304) is arranged to convert the incoming analog RF signal to the analog IF signal such that the analog IF signal is located in any of the N/2-1 frequency zones having lowest frequency; and the filter block (306-308) is arranged to l

Abstract: The invention relates to frequency synthesizer circuits, and in particular to frequency synthesizer circuits characterized by a small channel spacing. Embodiments disclosed include a frequency synthesizer circuit for a radio receiver, the circuit comprising: a digitally controlled oscillator configured to generate an output signal with an output frequency on application of an oscillator enable signal; a delay module; configured to delay an input reference signal to generate a delayed reference signal; and a duty cycle module configured to modulate the oscillator enable signal based on a period of an input reference signal and the delay of the delayed reference signal, such that a ratio between the output frequency and the frequency of the input reference signal is a non-integer.

Abstract: An electrical signal is processed by digitizing the electrical signal to produce a stream of digitized data in the time domain, wherein the stream has an original frequency spectrum, transmitting the stream to N signal paths (N>1), and down-converting and filtering the stream in each of the N signal paths to produce N streams of digitized data in the time domain, wherein the N streams have N frequency spectra, respectively, and the N frequency spectra cover N different portions of the original frequency spectrum, respectively.

Abstract: Disclosed is a method of setting an interface in a communication modem supporting a plurality of interfaces. The method includes determining a first mode in which an interface to the device is set in advance when it is detected to receive a signal from a device connected to the communication modem. The method also includes waiting for a reception of data after integrated pins belonging to the communication modem is set to correspond to the first mode. The method also includes determining a change of the first mode according to a result of receiving the data for a predetermined time.

Abstract: A peak suppression apparatus includes an acquiring unit that acquires a first signal represented by an amplitude waveform of a multicarrier signal, a generator that generates a second signal represented by a waveform sequentially connecting a plurality of peak points adjacent to one another in the first signal as a peak detection signal for the multicarrier signal, a detector that detects a peak value and a peak timing of the multicarrier signal by using the peak detection signal, and a suppressing unit that suppresses a peak of the multicarrier signal based on the peak value and the peak timing.

Abstract: The present invention is directed to data communication. More specifically, an embodiment of the present invention provides a technique for detecting loss of signal. An incoming data stream is sampled and a recovered clock signal is generated accordingly. An output clock signal of a higher frequency than the recovered clock signal is generated by a transmission PLL. The frequency of the recovered clock signal is compared to a divided frequency of the output clock signal. If a difference between the recovered clock signal and the output clock signal is greater than a threshold, a loss of signal indication is provided. There are other embodiments as well.

Abstract: A correlation between noise injection time at which a power supply noise signal is applied to a clock path and a path delay of the clock path at the time of the power supply noise signal being applied is acquired. Furthermore, noise injection time width based on a clock signal inputted from a circuit arranged before the clock path to the clock path is set. The differences between path delays within the set noise injection time width are calculated by the use of the acquired correlation and the maximum value of the differences is estimated to be clock jitter of the clock path. The estimated clock jitter is smaller than the worst value and overestimation is prevented.

Abstract: The embodiments of the present disclosure disclose a soft bit un-uniform quantization method, apparatus, computer program and storage medium. The soft bit un-uniform quantization method comprises: determining a threshold value; obtaining a quantization step according to the threshold value; obtaining a first data after a QAM demodulating and before a Turbo decoding in a wireless communication system; and performing a soft bit un-uniform quantization on the first data to obtain a quantization result according to the threshold value and the step. According to the present disclosure, the data after the QAM demodulating and before the Turbo decoding may obtain a distinguished Euclidean distance value and thus the performance can be improved greatly.

Abstract: Systems and methods for removing DC offset from a signal are provided. A radio frequency signal is received at a receiver. The radio frequency signal is converted into a digital signal including a periodic component with a period. A carrier frequency offset is removed from the digital signal to generate a frequency-shifted digital signal. The frequency-shifted digital signal is filtered to remove a DC offset in the digital signal. The filtering includes applying a moving average filter matched to the period to remove the periodic component from the frequency-shifted digital signal. The moving average filter generates a set of average values based on the frequency-shifted digital signal. The filtering also includes taking a difference between consecutive values of the set of average values to determine the DC offset, where the DC offset is introduced at the receiver.

Abstract: A receiver (100) is provided for signals of different signal strengths and modulated with respective pseudorandom noise (PN) codes. The receiver (100) includes a correlator circuit (120) operable to correlate the signals with a selectable locally-issued PN code having a Doppler and a code lag to produce a peak, the correlator circuit (120) being subject to cross correlation with a distinct PN code carried by least one of the signals that can produce cross correlation; and a cross correlation circuit (370, 400) operable to generate a variable comparison value related to the cross correlation as a function of values representing a Doppler difference and a code lag difference between the locally-issued PN code and the distinct PN code, and to use the variable comparison value to reject the peak as invalid from cross correlation or to pass the peak as a valid received peak.

Abstract: A distributed antenna system includes network interfaces configured to receive signals from devices external to distributed antenna system and to convert signals to downlink serialized data streams; distributed antenna switch communicatively coupled to network interfaces by digital communication links, distributed antenna switch configured to receive downlink serialized data stream from network interfaces across corresponding digital communication link; distributed antenna switch further configured to aggregate downlink serialized data streams into aggregate downlink serialized data stream; remote antenna unit communicatively coupled to distributed antenna switch by digital communication link that receives aggregate downlink serialized data stream across digital communication link, remote antenna unit further configured to extract downlink serialized data streams from aggregate downlink serialized data stream; remote antenna unit having radio frequency converter configured to convert downlink serialized data

Abstract: A wireless charging in-band communication system includes a transmitter module that formats a message using CRC calculation and attaches the results of the CRC calculation to the message for message error detection. The transmitter includes channel encoding for message error correction. A modulation module performs biphase modulation for DC balanced signals and impedance switching to change reflected impedance seen by the source. A synchronization module prepending the message with a synchronization sequence having Golay complementary codes. Moreover, the in-band communication includes a receiver module that receives the message from the transmitter module. The receiver module includes an impedance sensing circuit to detect changes in the reflected impedance of the transmitter module. The receiver module includes a front end filter used for pulse shaping and noise rejection.

Abstract: A method for decoding differentially modulated received symbols, the differentially modulated received symbols corresponding to a transmission of a differentially modulated version of a codeword out of a set of possible codewords, the received symbols being transferred onto resources of a channel, the resources being equally spaced. A receiver, for each possible codeword: obtains a vector of differentially demodulated symbols by differentially demodulating the differentially modulated received symbols obtained by combining two consecutive differentially modulated received symbols; calculates the product of each differentially demodulated symbol by the conjugate of the element of the codeword having the same rank within the codeword as the differentially demodulated received symbol; calculates the sum of the products; decodes the vector of differentially demodulated symbols by selecting the codeword for which the sum of the products is the maximum.

Abstract: Electric Vehicle Service Equipment (EVSE) and Electric Vehicle (EV) are disclosed n. In an example embodiment, a modem is coupled to the pilot wire that couples the EVSE and the EV. The modem transmits both pulse width modulation (PWM) command signals and power line communication (PLC) signals to a remote device via the pilot wire. The modem interleaves the PWM and PLC signals on the pilot wire so that latency requirements for the PWM signals are maintained. The modem supports parallel protocol stacks in which PLC signals are processed in a first path and PWM signals are processed in a second path that bypasses the first path and provides the PWM signals directly to a MAC layer. The modem may create a modified frame for the PLC signals to maintain the latency requirements.