Abstract: Embodiments of the present disclosure relate to a method, an apparatus and a computer readable storage medium for generating soft-decision information for a receiver. In example embodiments, a method is provided. The method includes receiving, at a first device, a signal from a second device, the signal corresponding to a group of symbols transmitted from the second device; determining, by performing Lattice Reduction linear detection on the signal, a first group of estimated symbols for the group of symbols; determining, by performing iterative interference cancellation on the first group of estimated symbols, a second group of estimated symbols for the group of symbols; and generating, based on the second group of estimated symbols, soft-decision information about the group of symbols for use by a decoder at the first device. Embodiments of the present disclosure can improve the receiver performance with reduced complexity.

Abstract: A multi-level optical signal is sampled to generate an eye diagram. The signal can be adjusted when eyes in the eye diagram have different heights. More specifically, a first value is determined, and the height of a first eye is adjusted using the first value. The first value is multiplied by a stored factor to produce a second value, and the height of a second eye is adjusted using the second value, and so on for other eyes. As a result, eye heights are the same. Similarly, optical power levels of the signal can be adjusted when the levels are not equally spaced. As a result, the optical power levels are equally spaced.

Abstract: Embodiments disclosed herein relate to improving an available bandwidth for a transceiver of an electronic device and to reducing a footprint of an associated integrated circuit of the electronic device. To do so, an isolation circuit is disposed between a transmit circuit and a receive circuit. The isolation circuit has first and second signal paths. A first portion of the signal propagates along the first signal path and a second portion of the signal propagates along the second signal path. A non-reciprocal phase shifter is disposed on the first signal path to shift a phase of the first portion to match a phase of the second portion and improve isolation between the transmit circuit and the receive circuit. The phase-shifted first portion may be combined with the second portion to reduce or substantially eliminate an insertion loss caused by the isolation circuit.

Abstract: In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.

Abstract: In one embodiment an apparatus includes: a mixer to downconvert a radio frequency (RF) spectrum including at least a first RF signal of a first channel of interest and a second RF signal of a second channel of interest to at least a first second frequency signal and a second second frequency signal; a first digitizer to digitize the first second frequency signal to a first digitized signal, the first digitizer configured to operate as a low-pass analog-to-digital converter (ADC); a second digitizer to digitize the second second frequency signal to a second digitized signal, the second digitizer configured to operate as a band-pass ADC; and a digital processor to digitally process the first digitized signal and the second digitized signal.

Abstract: In an embodiment, a communications system includes a transmitter including a digital beamforming baseband section including a digital mixer, the digital beamforming section configured to receive an input signal to be transmitted, the input signal at a baseband frequency; and a modulation section electrically coupled to the digital beamforming baseband section, the modulation section including an up converter configured to receive a local oscillator signal at a local oscillator frequency. The digital mixer is configured to apply a baseband frequency shift to the input signal to generate a baseband frequency shifted input signal at a different frequency from the baseband frequency. The up converter is configured to up convert the baseband frequency shifted input signal based on the local oscillator signal to generate a modulated signal at a carrier frequency, wherein the local oscillator frequency is different from the carrier frequency.

Abstract: A technique may include receiving, from one or more sensors, sensor data samples; receiving radio network information data samples associated with a radio network; determining one or more associated sensor and radio network information data samples based on an association of one or more received sensor data samples with one or more of the received radio network information data samples; selecting at least some of the one or more associated sensor and radio network information data samples that are relevant to performance of the radio network; and forwarding the selected associated sensor and radio network information data samples for subsequent use.

Abstract: A method for automatically correlating radio wave pulses includes deterring a first normalized phase shift that corresponds to a first radio wave pulse. The method further includes determining a second normalized phase shift that corresponds to a second radio wave pulse. The method further includes determining the first normalized first normalized phase shift is equal to the second normalized phase shift. The method further includes in response to determining the first normalized phase shift is equal to the second normalized phase shift, correlating the first radio wave pulse and the second radio wave pulse as originating from a same radio wave transmitter. The method further includes transmitting a signal indicative of the first radio wave pulse and the second radio wave pulse as originating from the same radio wave transmitter through a circuit.

Abstract: The present invention relates to an automatic bandwidth adjusting method comprising steps of receiving at least one radio signal, converting the at least one radio signal in a preset filter bandwidth into at least one audio signal; generating at least one signal-to-noise ratio (SNR) information based on the at least one audio signal, wherein the filter bandwidth is adjusted between multiple preset range intervals, and the range intervals are different; comparing the at least one SNR information with a preset first critical SNR and a preset second critical SNR to determine whether to adjust the filter bandwidth or not; outputting a bandwidth adjustment signal when the filter bandwidth needs to be adjusted; and adjusting the filter bandwidth according to the bandwidth adjustment signal.

Abstract: A wireless transceiver. The transceiver includes: (i) a transmit signal path; (ii) a calibration path, comprising a conductor to connect a calibration tone into the transmit signal path; (iii) a receive signal path, comprising a first data signal path to process a first data and a second data signal path, different than the first data signal path, to process a second data; (iv) a first capacitive coupling to couple a response to the calibration tone from the transmit signal path to the first data signal path; and (v) a second capacitive coupling to couple a response to the calibration tone from the transmit signal path to the second data signal path.

Abstract: Methods, apparatuses, and system for performing at least one of error correction or error detection are described. In one embodiment, a radio frequency identification (RFID) tag receives a signal activating or interrogating the tag. The tag includes memory that stores data associated with the tag. The tag performs at least one of error detection or error correction on the stored data. The error detection includes detecting, by the tag, that one or more bits of the stored data are inflicted with an error. The error correction includes correcting the erroneous bit if the error affects less than a predetermined number of the bits of the stored data. The tag transmits the stored data to a reader in response to the detection or correction. The reader can analyze the stored data for additional information about the error or provide the stored data to another computing system that performs the analysis.

Abstract: A method of configuring a measurement for a mobile terminal configured with a plurality of component carriers in a wireless communication system is discussed. The method is performed by a base station and includes transmitting, by the base station, configuration information to the mobile terminal. Further, when the transmitted configuration information includes an indication information for the measurement in an extension component carrier among the plurality of component carriers, the measurement in the extension component carrier is based on a channel state information reference signal (CSI-RS), and when the transmitted configuration information does not include the indication information for the measurement in the extension component carrier among the plurality of component carriers, the measurement in the extension component carrier is based on a common reference signal (CRS).

Abstract: A semiconductor device including a random number generator includes a memory device component including an array of a plurality of memory cells, and a comparator component including a plurality of comparators connected to respective pairs of read bitlines (RBLs). Each of the plurality of comparators is configured to read the array by comparing signals of its corresponding pair of RBLs, and generate an output based on a comparison. The outputs are assembled to generate a bit stream corresponding to a random number.

Abstract: A transmitter includes a processing circuit to generate I level data and Q level data that, when respectively converted to I baseband input and Q baseband input, cause a carrier signal modulated by the I baseband input and the Q baseband input to have a desired edge shape in the time domain. The edge shape includes a low portion, a high portion, and an edge portion between the low portion and the high portion. The edge portion has a desired edge time compatible with the frequency of the carrier signal. The transmitter further includes a digital-to-analog converter (DAC) to convert the I level data to the I baseband input and the Q level data to the Q baseband input, and an in-phase and quadrature (I/Q) modulator to perform I/Q modulation of the carrier signal according to the I baseband input and the Q baseband input.

Abstract: Embodiments of the disclosure provide application layer, Medium Access Control (MAC) layer, and physical (PHY) layer functionality by discrete devices, to form a distributed MAC/PHY architecture for communications networks. An application layer (layer-3) device can communicate with a MAC layer (layer-2) device. The layer-2 device may switch IP layer (layer-3) information to MAC layer information. Further the layer-2 device can use addressing information determined or received from the layer-3 device to choose a particular PHY layer (layer-1) device. The layer-2 device can instruct the layer-1 device, to modulate information on one or more frequencies and/or wavelengths over a given physical medium. In an embodiment, the various communications between the devices can occur using a downstream external PHY interface (DEPI) protocol and an upstream external PHY interface (UEPI) protocol. In an embodiment, the monitoring of the devices can be performed using a management plane generic control plane (GCP) protocol.

Abstract: Methods, systems, and devices for wireless communication using multi-user superposition (MUST) techniques in conjunction with multiple-input multiple-output (MIMO) techniques are described. A base station may configure an enhancement layer user equipment (UE) and a base layer UE with a transmit power ratio associated with enhancement layer transmissions and base layer transmissions. The base station may then transmit on the base layer and enhancement layer on multiple spatial layers using MIMO techniques. A UE may receive the transmission, determine the total power of the transmission on all spatial layers, and apply a power splitting constraint to determine the distribution of power for the transmission on the different spatial layers. The UE may then determine the transmit power of a transmission on a specific layer based on the power ratio configuration and use this information to demodulate and decode the transmission.

Abstract: A combination of signal parameters of a received OFDM signal are determined by determining, for each of a plurality of lags, a plurality of correlation peaks for the OFDM signal, wherein the correlation peaks form a plurality of sets of peaks, wherein each set of peaks is associated with a combination of signal parameters of the OFDM signal; performing a validation procedure to validate one or more peaks based on at least one correlation peak value; and determining a combination of signal parameters of the OFDM signal based on the validated peaks in the sets of peaks.

Abstract: A method for estimating parameters of a single signal or mixed-frequency signals in a given frequency band comprises: receiving the signal(s); calculating a spectral correlation function having variables f and ? (cyclic frequency) for different values of L taken from a set of q strictly positive values, where, for each q, ? can independently take on one or more discrete values and/or cover one or more value ranges; from each calculation, extracting a set of local maxima detected on the basis of the variables f and ? or on the basis of variable f for each discrete value of ?, each of said peaks being characterized by a triplet [LApi, LFpi, L?pi], LFpi and L?pi being the frequency and cyclic frequency of said triplet, respectively, and LApi being the amplitude; and identifying groups of triplets as being the signature left by a set of parameters making up the signal(s).

Abstract: A method of performing a measurement when a mobile terminal is configured with a plurality of component carriers is discussed. The method is performed by the mobile terminal and includes receiving, by the mobile terminal, configuration information from a base station; and performing, by the mobile terminal, the measurement based on the received configuration information. Further, when the received configuration information includes an indication information for the measurement in an extension component carrier among the plurality of component carriers, the measurement in the extension component carrier is based on a channel state information reference signal (CSI-RS), and when the received configuration information does not include the indication information for the measurement in the extension component carrier among the plurality of component carriers, the measurement in the extension component carrier is based on a cell specific reference signal (CRS).

Abstract: Systems, methods, and apparatuses for wireless communication are described. Input data for in-phase branch/quadrature branch (I/Q) imbalance or mismatch may be compensated for or non-linear power amplifier noise may be used to generate compensated input data. In some examples, a transmitter may be configured to transmit communications signaling via a first antenna, the transmitter including a filter configured for digital mismatch correction; a receiver may be configured to receive communications signaling via a second antenna; and a switch may be configured to selectively activate a first switch path to couple the transmitter and the first antenna and a second switch path to couple the receiver and the transmitter to provide communications signaling received via the transmitter as feedback for the filter through the receiver.

Abstract: An IQ mismatch correction function generator configured to generate an enhanced IQ mismatch correction function to improve the compensation for IQ mismatch, and an IQ signal receiver with the IQ mismatch correction function generator, wherein the enhanced IQ mismatch correction function is determined based on an initial IQ mismatch correction function derived from IQ mismatch estimates corresponding to frequency bins where signals are present and error of the initial IQ mismatch correction function by comparing the values of the initial IQ mismatch correction function with IQ mismatch estimates corresponding to a respective bin of the frequency bins.

Abstract: Techniques are described for carrier frequency offset (CFO) and channel estimation of orthogonal frequency division multiplexing (OFDM) transmissions over multiple-input multiple-output (MIMO) frequency-selective fading channels. A wireless transmitter forms blocks of symbols by inserting training symbols within two or more blocks of information-bearing symbols. The transmitter applies a hopping code to each of the blocks of symbols to insert a null subcarrier at a different position within each of the blocks of symbols, and a modulator outputs a wireless signal in accordance with the blocks of symbols. A receiver receives the wireless signal and estimates the CFO, and outputs a stream of estimated symbols based on the estimated CFO.

Abstract: An apparatus has a first emitter emitting at a first frequency optical pulses that form a first pulse collection. A second emitter emits at a second frequency optical pulses that form a second pulse collection. A first receiver collects during a time of flight time window a first reflected pulse collection corresponding to the first pulse collection reflected from a sensed object. A second receiver collects during the time of flight time window a second reflected pulse collection corresponding to the second pulse collection reflected from the sensed object. A processor analyzes the first reflected pulse collection and the second reflected pulse collection to produce first reflected pulse collection metrics and second reflected pulse collection metrics.

Abstract: A data buffering control system and method for a communication network comprises a buffer disposed at a destination site, and a controller. The buffer is configured to buffer data received at a data receiving rate by the destination site for delivery by the destination site to a user at a delivery flow rate. The controller is configured to increase or decrease a buffering rate according to which the data is buffered in the buffer based on an amount of buffered data in the buffer without stopping the buffering of the data in the buffer. The controller is configured to perform a transmission control protocol spoofing process at the destination site to effect a communication handshaking operation, without the destination site communicating with a source providing the data, to control the data receiving rate by the destination site, to thus modify the buffering rate.

Abstract: The present invention relates to a modular and flexible measurement of radio-frequency signals. For this purpose, the measurement system is separated into a connection device performing digital operations and a radio-frequency signals comprising analogue circuits. The connection device and the radio-frequency device are coupled with each other by appropriate interfaces for exchanging signals, in particular digital signals between the communication device and the radio-frequency device.

Abstract: Disclosed herein are multi-mode methods and devices for sample generation. An exemplary device for generating an output sample includes an analog-to-digital converter (ADC) for sampling a plurality of input analog signals and producing an ADC output sample. The ADC may include a ADC digital modulator including timing-critical components. A plurality of digital blocks may be coupled to the ADC digital modulator. The exemplary device may include a baseband processor for controlling a plurality of clock inputs. The plurality of clock inputs may drive the ADC digital modulator and the plurality of digital blocks. The baseband processor may be configured to operate in a plurality of modes including a first mode and a second mode. The first mode may include a first mode standby state and a first mode initial operating state. The second mode may include a second mode initial operating state and a second mode standby state.

Abstract: A cloud based echo canceller is set forth for recreating an estimate of a lost packet or data at a server without requiring redundant data over the network or freezing operation of the echo canceller. In an exemplary embodiment, the echo cancelling function is not located in a single device, but is shared between the end-point and a cloud service, where the function of the end-point is to provide a time synchronized copy of the signal from the end-point loudspeaker and the signal received by the end-point microphone. Consequently, the high CPU intensive operations can be offloaded to a server such as a cloud server. In addition, several users can share the echo canceller, thereby reducing the cost of the overall function. According to an additional aspect, a further synchronization block is provided, in the form of a packet estimator, to compensate for packet or data loss in the send direction.

Abstract: A method for channel measurement is provided when a mobile terminal is configured with a primary component carrier and a secondary component carrier. The mobile terminal receives configuration information for channel measurement in the secondary component carrier from a base station. The mobile terminal derives the channel measurement in the secondary component carrier based on a channel state information reference signal (CSI-RS) when the configuration information includes a first indicator indicating that CSI-RS is used for the channel measurement in the secondary component carrier, or deriving the channel measurement in the secondary component carrier based on a cell-specific reference signal (CRS) when the configuration information does not include the first indicator.

Abstract: An active optical machine-readable tag (i.e. optical tag) is provided that is addressable and readable within a line-of-sight of a reader device, such as a mobile device equipped with a camera, at substantially large distances. A method and a system are provided for an active optical tag and a camera-based reader thereof that facilitate asynchronous communication at data rates that are sufficiently high for practical uses, while reducing the flicker associated with the low-frequency optical carrier to a level hardly noticeable by people. The optical tag may be formed as an array of light emitting elements, arranged in a single dimension (linear) or two dimension (planar) arrangement. The array may be embodied as part of a large display unit.

Abstract: A method for transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method includes receiving the signal from a first frequency band in a single frame including at least one frequency band, demodulating the received signal by an orthogonal frequency division multiplexing (OFDM) method and parsing the signal frame, acquiring a symbol stream of a service stream from the at least one frequency band included in the parsed signal frame, demapping symbols included in the symbol stream and outputting the demapped symbols to sub streams, multiplexing the output sub streams and outputting one bit stream, and deinterleaving and error-correction-decoding the output bit stream.

Abstract: A device includes a frequency offset (FO) compensation circuit coupled with a decoder, and a soft information measurement circuit. The frequency offset compensation circuit is configured to: (i) receive a continuous phase modulation (CPM) signal, (ii) adjust the CPM signal in a sampling window based on a frequency offset compensation value, and (iii) provide the adjusted CPM signal to the decoder. The decoder is configured to: (i) receive the adjusted CPM signal generated by the FO compensation circuit, (ii) decode the adjusted CPM signal to obtain one or more information symbols associated with the CPM signal, (iii) provide the one or more information symbols for soft information generation; and (iv) receive soft information provided by the soft information measurement circuit.

Abstract: The present disclosure relates to a system and a method for monitoring vessel traffic information. The system for monitoring vessel traffic information includes: an interlock device configure to adjust identification information of a wireless terminal included in a received message to correspond to an identification system of auto identification system (AIS) message and convert the received message into a AIS message type, when receiving a message including ship information from a wireless terminal of a ship located in at least one ship network; a merging device configure to merge the ship information included in the converted AIS message with radar image information; and a monitoring device configure to display merged monitoring information on a monitoring screen.

Abstract: A first local oscillator generates a modulation signal of a predetermined frequency. A second local oscillator outputs a local oscillation signal frequency-modulated by using the modulation signal from the first local oscillator. A quadrature detection unit subjects an FM signal to quadrature detection by using the local oscillation signal output from the second local oscillator and outputs a base band signal. A first reduction unit and a second reduction unit reduce a direct current component contained in the base band signal. A correction unit restores the direct current component by correcting the base band signal such that the base band signal is centered around an origin of a polar coordinate system on an IQ plane. An FM detection unit subjects the corrected base band signal to FM detection and generates a detection signal.

Abstract: Disclosed herein is a broadcast signal transmitter. The broadcast signal transmitter according to an embodiment of the present invention includes an input formatting module configured to perform baseband formatting and to output at least one Physical Layer Pipe (PLP) data, a BICM module configured to perform error-correction processing on the PLP data, a framing and interleaving module configured to interleave the PLP data and to generate a signal frame, and a waveform generation module configured to insert a preamble into the signal frame and to generate a broadcast signal by OFDM-modulate the signal frame.

Abstract: A wireless device may utilize enhanced OBSS identification techniques to determine whether an interfering transmission is associated with an OBSS. In an example, a wireless device may receive a WLAN packet that includes a preamble and a data region. The wireless device may analyze the preamble to determine whether the WLAN packet is an OBSS packet. If the wireless device determines there is insufficient information in the preamble to identify the WLAN packet as an OBSS packet, the wireless device may decode a portion of the data region (e.g., a MAC header) to determine if the WLAN packet is an OBSS packet. Prior to declaring a successful decoding of the MAC header, the wireless device may confirm the MAC header has been received reliably. Additionally or alternatively, BSS identifiers may be included in the data region and used to determine if the WLAN packet is associated with an OBSS.

Abstract: Provided are a reception device, a reception method and a transmission reception system capable of reducing the influence of distortion in a received signal and achieving high demodulation performance without performing a computation process having a great amount of calculations. The reception device receives a signal containing a known signal part and a data part, and includes a conversion unit that converts the signal received by a reception unit into a digital signal, a region determination unit that determines a nonuse region which is a periodic region containing distortion in the digital signal, on a basis of a first digital signal in the known signal part contained in the digital signal and a known signal held in advance, and a demodulation unit that performs demodulation on the digital signal by using a second digital signal in a region other than the nonuse region in the digital signal.

Abstract: Disclosed herein are a Bluetooth signal receiving device and a Bluetooth Smart receiving method. The Bluetooth signal receiving device includes a frequency shift demodulator circuit, a sampler circuit, a training bit pattern discriminator circuit, and a symbol timing offset compensation circuit. The frequency shift demodulator circuit generates a baseband signal by performing frequency shift modulation on a received signal. The sampler circuit samples the baseband signal based on a symbol timing, and generates a plurality of series of bit streams based on sampled values. The training bit pattern discriminator circuit determines whether the plurality of series of bit streams generated by the sampler circuit satisfies a training bit pattern condition. The symbol timing offset compensation circuit compensates the symbol timing of the baseband signal based on a measured error metric as an effective error metric if the plurality of series of bit streams satisfies the training bit pattern condition.

Abstract: A system receives an audio stream from an application, and performs signal analysis on the audio stream to compute (on sound and silence) a sequence of events. The sequence of events identifies a pattern comprised of at least two of sound, silence, frequency, magnitude, duration, tone, and Dual Tone Multi Frequency (DTMF). The pattern matches a similar pattern of at least two of sound, silence, frequency, magnitude, duration, tone, and DTMF, and the signal analysis is performed on sound and silence within the audio stream. The similar pattern is associated with at least one of an automated device or human answering the call. The system determines whether the sequence of events indicates the phone call is answered by the automated device or the human, based on rules in a heuristic engine and/or a known audio print from a library of known audio prints.

Abstract: Class types of input signals having unknown class types are automatically classified using a neural network. The neural network learns features associated with a plurality of different observed signals having respective different known class types. The neural network then recognizes features of the input signals having unknown class types that at least partially match at least some of the features associated with the plurality of different observed signals having respective different known class types. The neural network determines probabilities that each of the input signals has each of the known class types based on strengths of the matches between the recognized features of the input signals and the features associated with plurality of different observed signals. The neural network classifies each of the input signals as having one of the respective different known class types based on a highest determined probability.

Abstract: Systems, devices and methods are disclosed for detecting, characterizing and engaging unmanned vehicles. In one aspect, a method includes detecting an object, such as an unmanned aerial, land or aquatic vehicle that communicates using a radio control (RC) communications protocol, traveling to a zone including scanning one or more frequencies of RF signals; analyzing one or both of time and frequency information of the RF signals to characterize the detected object; and engaging the detected object as an authorized or unauthorized object in the monitored zone.

Abstract: A filtering device intended for being connected to a portable mobile terminal compatible with a PMR network having a wide range of receiving frequencies Bi, includes a fastening system for fastening to the mobile terminal, a first radio-frequency connector intended for engaging with a radio-frequency connector of the mobile terminal, a first channel including a first filter for filtering a first receiving useful band Bui included within the band Bi, and a second radio-frequency connector intended for engaging with a removable RF antenna to transmit or receive radio-frequency signals.

Abstract: A system, apparatus, and related method for receiving and correlating Manchester encoded data signals includes a receiver for receiving 1090ES/ADS-B or other Manchester encoded signals. A sampler extracts and oversamples data strings from the received signals. Sample correlators compare the oversampled data strings to oversampled versions of each possible pattern for the extracted data string and determine a score indicating how closely the possible pattern (or its oversampled counterpart) matches the extracted data string (or its oversampled version) on a bitwise or symbolwise basis. The system outputs correlated and decoded data string most closely matching the extracted data string based on the set of determined scores.

Abstract: A method for processing audio data includes obtaining a noise frame of an audio signal, and decomposing the current noise frame into a noise low-band signal and a noise high-band signal; and encoding and transmitting the noise low-band signal by using a first discontinuous transmission mechanism, and encoding and transmitting the noise high-band signal by using a second discontinuous transmission mechanism. According to the present disclosure, different processing manners are used for the high-band signal and the low-band signal, calculation loads and encoded bits may be saved under a premise of not lowering subjective quality of a codec, and bits that are saved may help to achieve an objective of reducing a transmission bandwidth or improving overall encoding quality.

Abstract: A physical quantity sensor includes a detection circuit that outputs a detection value indicating a physical quantity applied to a detecting element and a correction processor that corrects the detection value to output a corrected value. The correction processor causes the corrected value to be substantially 0 (zero) if all of conditions that an absolute value of a time-differentiated value of the detection value is not larger than a predetermined differential threshold and that an absolute value of the corrected value is not larger than a predetermined output threshold are satisfied. This physical quantity sensor prevents the output signal from changing due a temperature change in spite of a small number of components.

Abstract: Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter.

Abstract: Systems and methods for automatically controlling one or more parameters of a digital phase-locked loop (DPLL) circuit are provided. A phase error signal generated by a phase detector of the DPLL circuit is received. A delayed version of the phase error signal is generated. A product of the phase error signal and the delayed version of the phase error signal is generated. The product is integrated, and a first output for controlling a gain of a proportional path of the DPLL circuit is generated based on the integrated product. The first output is down-sampled. A least-mean-square (LMS) filter is used to generate a second output that minimizes a value of the down-sampled output. A gain of an integral path of the DPLL is controlled based on the second output.

Abstract: A method for calibrating a mixer, an apparatus using the calibrated mixer, and a method for using the apparatus to calibrate another mixer are disclosed. The method includes coupling a first RF signal characterized by a first timezero phase and a first RF frequency to the RF signal input. The method includes (a) coupling a first LO signal characterized by a first LO frequency and a first LO timezero phase to the LO signal input terminal; (b) determining an IF tone timezero phase of a tone from the IF signal output corresponding to the first LO signal; and (c) determining a first after LO signal path timezero phase from the IF tone and first LO timezero phase. Steps (a), (b), and (c) are repeated for second and third LO signals. An LO phase change as a function of frequency introduced by the LO signal path is then determined.

Abstract: Aspects relate to correcting Inphase/Quadrature (I/Q) imbalances across multiple wireless elements such as multiple receive elements or multiple transmit elements. In one example implementation, I/Q imbalances can be corrected using a digital circuit provided within a digital portion of a direct conversion wireless element (upconversion or downconversion) that implements only two multiplications and one addition per pair of I and Q samples.

Abstract: A method involving: detecting in an image a first type of artifact (A1) to generate a first artifact value (GA1) and a first confidence level (CA1); detecting in the image a second type of artifact (A2) to generate a second artifact value (GA2) and a second confidence level (CA2); and performing correction of the first type of artifact (A1) in the image based on the first and second artifact values (GA1, GA2) and the relative values of the first and second confidence levels (CA1, CA2).

Abstract: An electronic apparatus including an oscillator, a sampler, a phase detector, a phase rotator and a loop filter is provided. The oscillator generates a reference and an auxiliary clock signal offset by 90 degrees. The sampler samples an input data signal at each transition edges to generate primary sampled signals. The phase detector determines a phase difference of a data transition of the input data signal relative to a data-sampling edge. The phase rotator rotates the primary sampled signals and the reference clock signal according to the phase difference. The loop filter generates a control voltage to control the oscillator to vary phases of the reference clock signal and the auxiliary clock signal according to phase difference of the data transition relative to the rotated reference clock signal.