Abstract: Systems and methods are disclosed herein for intra-symbol Orthogonal Cover Code (OCC) mapping for transmissions such as, e.g., New Radio-Unlicensed (NR-U) Physical Uplink Control Channel (PUCCH) transmissions. In this regard, embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device comprises selecting a repetition mapping for In-Phase/Quadrature-Phase (I/Q) symbol repetitions within an Orthogonal Frequency Division Multiplexing (OFDM) or Discrete Fourier Transform spread OFDM (DFT-s-OFDM) symbol of an uplink transmission. The I/Q symbol repetitions are for application of an intra data symbol OCC to the I/Q symbol repetitions. The method further comprises transmitting an uplink transmission using the selected repetition mapping. In this manner, performance is improved.

Abstract: An embodiment of a semiconductor package apparatus may include technology to determine a residual error based on coding unit information, and determine a candidate coding unit and an associated rate distortion cost based on the residual error. An embodiment may additionally or alternatively include technology to partition a first coding unit into two or more smaller coding units based on a partition message, accelerate processing of at least one of the two or more smaller coding units, and estimate motion fora frame based at least partially on results of the accelerated processing. Other embodiments are disclosed and claimed.

Abstract: Disclosed is a method for updating a list of radio stations that can be received by a receiver system including at least two radio receivers, the method including: ?determining a list of radio stations that can be received at a given instant, ?measuring the quality of a current radio signal, corresponding to a frequency selected and listened to, ?determining the ageing of the list of receivable radio stations, ?comparing the quality with a configurable threshold that can be upgraded at least as a function of the ageing of the list, ?if the quality exceeds the configurable threshold, deactivating the phase diversity filtering function and evaluating the change in the quality of the received signals and, ?as a function of the evaluation:—automatically updating, or—keeping unchanged the list of receivable radio stations.

Abstract: A quadrature clock generator includes a variable delay clock generator configured to receive a first clock and a third clock and output a second clock and a fourth clock in accordance with a control signal, wherein the first clock and the third clock are substantially the same but offset in timing by one half of the period; a quadrature phase error detector configured to receive the first clock, the second clock, the third clock, and the fourth clock and output a first phase detection signal and a second phase detection signal, wherein the first phase detection signal represents a relative timing between the first clock and the second clock and the second phase detection signal represents a relative timing between the second clock and the third clock; and an amplifier configured to amplify a difference between the first phase detection signal and the second phase detection signal into the control signal.

Abstract: A switched-capacitor DC-DC power converter circuit is provided. The switched-capacitor DC-DC power converter circuit includes N input-side switched capacitor units and N output-side switched capacitor units. There is a charge recycling phase located between two adjacent conversion phases. In the 2N conversion phases, a bottom end of a capacitor of at least one of the input-side switched capacitor units and a bottom end of a capacitor of at least one of N output-side switched capacitor units is selectively electrically connected to an output terminal of the switched-capacitor DC-DC power converter circuit. In each charge recycling phase, bottom ends of two capacitors of N input-side switched capacitor units and N output-side switched capacitor units are electrically connected to each other through two of the input-side charge recycle switches and output-side charge recycle switches.

Abstract: An audio encoding and decoding method and a related apparatus are provided. The audio encoding method may include: determining a coding mode of a current frame; when determining that the coding mode of the current frame is an anticorrelated signal coding mode, performing time-domain downmix processing on left and right channel signals in the current frame by using a time-domain downmix processing manner corresponding to the anticorrelated signal coding mode, to obtain a primary channel signal and a secondary channel signal, where the time-domain downmix processing manner corresponding to the anticorrelated signal coding mode is a time-domain downmix processing manner corresponding to an anticorrelated signal channel combination scheme, and the anticorrelated signal channel combination scheme is a channel combination scheme corresponding to a near out of phase signal; and encoding the obtained primary channel signal and secondary channel signal in the current frame.

Abstract: A method for a device for determining the location of a mobile transmitting device using a two phase time difference of arrival method and to a system using such a device are presented. There is a first radio node for calculating a location of a third radio node, for receiving, from the third radio node, a first ranging signal and for calculating, based on the first ranging signal, a first ranging parameter. The first radio node receives, from a second radio node, a second ranging signal, transmits to the second radio node a third ranging signal, calculates a phase offset between the first and second radio nodes based on the second and third ranging signals, and calculates a distance between the first and third radio nodes based on the phase offset between the first and second radio nodes based on the first ranging parameter.

Abstract: A radio frequency sensing, control, and particulate matter diagnostics network and system and method and, more specifically, a radio frequency particulate filter diagnostics system comprising a housing including an inlet connected to a source of particulate matter, a particulate filter in the housing and adapted for filtering the particulate matter, and a radio frequency sensor adapted to detect conditions of abnormal particulate filter or system operation and including at least one radio frequency probe configured to be in contact with the housing for the particulate filter housing and adapted to receive radio frequency signals and a radio frequency control unit in communication with the radio frequency probe.

Abstract: Disclosed herein, one embodiment of the disclosure is directed to a system, apparatus, and method for enabling simultaneous transmit and receive in the same Wi-Fi band within a device by first obtaining a first information corresponding to a first set of signals to be transmitted wirelessly by a first antenna of a first device and transmitting, by the first antenna of the first device, the first set of signals. Then, a second set of signals comprising: (a) the first set of signals transmitted by the first antenna of the first device and (b) a third set of signals transmitted by a second device different than the first device are received by a second antenna of the first device. Thereafter, a second information representing the second set of signals received by the second antenna of the first device is obtained. Last, based on the first information and the second information, a third information comprising an estimation of the third set of signals without the first set of signals is determined.

Abstract: A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving a first signal operating at a first carrier frequency, receiving a second signal operating at a second carrier frequency, the first carrier frequency differing from the second carrier frequency, generating a combined signal based on the first signal and the second signal, measuring power levels in the combined signal, averaging at least a portion of the power levels to generate an average power level, determining a threshold according to the average power level, and monitoring interference in the combined signal according to the threshold. Other embodiments are disclosed.

Abstract: Systems and methods which provide oscillator configurations implementing phase rotation (rotated-phase-tuning (RPT)) are described. Embodiments of a RPT oscillator may employ phase interpolation, whereby two current vectors having different phases are superimposed to provide a resultant current vector having a tunable phase to vary a phase shift in a feedback loop of an oscillator circuit and correspondingly tune the oscillation frequency. Phase rotation provided by an RPT oscillator configuration of embodiments inserts a negative phase shift (rotation phase shift) into each of two current branches to rotate the phase shifts of a phase-tuning technique, such as for avoiding phase ambiguity with respect to tunable oscillation frequencies. RPT oscillators of embodiments are varactor-less and are particularly well suited for operation to provide output frequencies in the millimeter-wave (mmW) band.

Abstract: A method of decoding an encoded audio bitstream and generating frequency bandwidth extension is disclosed. The method includes decoding the audio bitstream to produce a decoded low band audio signal and generate a low band excitation spectrum corresponding to a low frequency band. A sub-band area is identified within the low frequency band using a parameter which indicates energy information of a low band spectral envelope. A high band excitation spectrum is generated for a high frequency band by copying a sub-band excitation spectrum from the identified sub-band area to a high sub-band area corresponding to the high frequency band. Using the generated high band excitation spectrum, an extended high band audio signal is generated by applying a high band spectral envelope. The extended high band audio signal is added to the decoded low band audio signal to generate an audio output signal having an extended frequency bandwidth.

Abstract: The present invention discloses methods and systems for managing a power over Ethernet (PoE) capable device through a manual information input module. Information is obtained through the manual information input module, and a current power mode is determined. Based on the information, a power mode is reset or applied. If it is determined to apply a power mode, internal switches are opened or closed and the device supplies or receives power over Ethernet according to the power mode.

Abstract: A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving a first signal operating at a first carrier frequency, receiving a second signal operating at a second carrier frequency, the first carrier frequency differing from the second carrier frequency, generating a combined signal based on the first signal and the second signal, measuring power levels in the combined signal, averaging at least a portion of the power levels to generate an average power level, determining a threshold according to the average power level, and monitoring interference in the combined signal according to the threshold. Other embodiments are disclosed.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Provided is a method of transmitting signals in an FBMC/OQAM system. Data symbols transmitted in category-2 data symbols or category-3 data symbols are determined according to interference from all of adjacent OQAM data symbols and an intrinsic interference coefficient of category-2 data symbols interference experienced by category-3 data symbols in a user data block, so that transmission symbols in the category-3 data symbols composed of transmitted data symbols and interference include target data symbols of the category-3 data symbols and target data symbols of the category-2 data symbols. A transmitting device transmits the data symbols of the category-3 data symbols and data symbols transmitted in category-2 data symbols together with other data symbols in the user data block.

Abstract: A method performed by an access point (AP) that includes: receiving, by the AP from a second station, an information request frame for requesting whether or not a wakeup schedule is established between the AP and a first station; and transmitting, by the AP to the second station, an information response frame including a first wakeup schedule element in response to the information request frame. If the AP has an established wakeup schedule with the first station, the first wakeup schedule element includes information about the establish wakeup schedule, and if the AP has no established wakeup schedule with the first station, a length of the first wakeup schedule element is set to zero by the AP. The method also includes transmitting, by the AP to the second station, an unsolicited information response frame when the AP updates the first station's wakeup schedule.

Abstract: The present invention relates to a communication system and methods of use thereof. The system includes sets of complementary radios for transmitting and receiving signals to achieve high reliability and reduced costs. The sets of complementary radios are in wireless communication with each other. A new connection is made by selecting from amongst the complementary radios. Switching between complementary radios during a connection is also permitted. Optimized protocols and hardware for implementing the system are disclosed.

Abstract: Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the audio signal level decrease below a certain level, the audio amplifier may be switched from amplifying the audio signal with a boost converter input to amplifying the audio signal with a low voltage input. Control of the audio amplifier may be implemented in a digital boost converter controller coupled to the boost converter and/or the audio amplifier.

Abstract: Disclosed is a common antenna for near field communication (NFC) and frequency modulation (FM). The common antenna comprises an antenna coil. The antenna feed line ends of the antenna coil are connected to an NFC matching circuit and an FM matching circuit, respectively. According to the disclosure, the antenna coil is connected to the NFC matching circuit and the FM matching circuit, respectively, so as to realize that the antenna is shared by the NFC and the FM, thereby reducing the costs, saving the space, and improving the product competitiveness.

Abstract: The present invention relates to a communication system and methods of use thereof. The system includes sets of complementary radios for transmitting and receiving signals to achieve high reliability and reduced costs. The sets of complementary radios are in wireless communication with each other. A new connection is made by selecting from amongst the complementary radios. Switching between complementary radios during a connection is also permitted. Optimized protocols and hardware for implementing the system are disclosed.

Abstract: A system is disclosed for monitoring of individual frequency channels in an RF signal band by configuration of the electronic processor to operate the tunable filter to select desired channel sub bands. Measurement of forward and/or reverse-propagating fields within the selected sub-bands may be performed and corresponding power levels recorded. The records may be used to provide monitoring signals, such as measures of forward and reflected power, as well as VSWR, return loss. Indications or alarms may be activated if any of these quantities, associated with any one or more channels, falls outside a predetermined acceptable operating range.

Abstract: A new coded continuous phase modulation (CPM) scheme is proposed to enhance physical layer performance of the current DVB-RCS standard for a satellite communication system. The proposed CPM scheme uses a phase pulse design and combination of modulation parameters to shape the power spectrum of CPM signal in order to improve resilience to adjacent channel interference (ACI). Additionally, it uses a low complexity binary convolutional codes and S-random bit interleaving. Phase response using the proposed CPM scheme is a weighted average of the conventional rectangular and raised-cosine responses and provides optimum response to minimize frame error rate for a given data rate.

Abstract: A wireless receiver (10) includes a down converter module (210) operable to deliver a signal having a signal bandwidth that changes over time, a dynamically controllable filter module (200) having a filter bandwidth and fed by said down converter module (210), and a measurement module (295) operable to at least approximately measure the signal bandwidth, said dynamically controllable filter module (200) responsive to said measurement module (295) to dynamically adjust the filter bandwidth to more nearly match the signal bandwidth as it changes over time, whereby output from said filter module (200) is noise-reduced. Other wireless receivers, electronic circuits, and processes for their operation are disclosed.

Abstract: Systems and apparatuses are provided for negating the degradation effects of fundamental coupling between at least two near field communication (NFC) enabled devices, at least one of which can receive frequency modulation (FM) signals. Due to the fundamental coupling, strong NFC signals can mix with blocking signals associated with a desired/tuned-to FM frequency causing degradation in FM receiver performance. By utilizing a notch filter at the front end of the FM receiver, the degradation in FM receiver performance caused by the fundamental coupling phenomenon can be avoided.

Abstract: A wireless receiver designed to conform to the standard IEEE 802.15.4. The receiver comprises an analog front-end and a digital decoder. The analog components of the front end include one or more amplifiers and an analog-to-digital converter (ADC). The digital decoder receives the output of the ADC and demodulates it in a demodulator which is driven at an a chip frequency by an internal or external clock. The demodulator comprises a sampler operable to sample the digital signal at a sampling frequency and a correlation unit operable to process a set of bits, referred to as a chip code, in the sampled digitized signal and output therefrom a set of correlation values. The set of correlation values is an indicator of likely mapping between the chip code that has been processed and a set of possible chip codes defined according to the standard. The demodulator further comprises a symbol selection unit and a frequency correction unit.

Abstract: An access point is disclosed herein that comprises a wireless network adapter configured to support a backhaul connection for a peer node to a network; a processing system configured to calculate precoding matrices that define spatial streams; and a transceiver configured to transmit data to the nodes on the spatial streams.

Abstract: FM receiver including an RF input circuit followed by a tunable mixer stage for frequency conversion of an RF FM signal into an IF FM signal, which is coupled to an FM input of a first narrow-band IF filter. The center frequency of the first narrow-band IF filter is controlled to vary in dependence on the IF FM signal. The first narrow-band IF filter is subsequently coupled to a first FM demodulator and a first LF signal processing unit. To increase the receiver's selectivity and sensitivity without adversely affecting tracking stability, the FM input of a first narrow-band IF filter is coupled through a second FM demodulator to a control input of said first narrow-band FM tracking filter for a feed forward tracking control of the center frequency of said first narrow-band FM tracking filter with the momentary frequency of the IF FM signal.

Abstract: A method and apparatus for processing a terahertz frequency electromagnetic beam are disclosed. For example, the method receives the terahertz frequency electromagnetic beam via a metamaterial having a plurality of addressable magnetic elements, where a resonant frequency of each of the plurality of addressable magnetic elements is capable of being programmably changed via an adjustment, and activates selectively a subset of the plurality of addressable magnetic elements to manipulate the terahertz frequency electromagnetic beam.

Abstract: A computing device configured for enforcing a computing device power policy is described. The computing device includes a processor and executable instructions stored in memory that is in electronic communication with the processor. The computing device generates a power policy. The computing device also sends the power policy. The computing device further receives a suspicious process alert. Additionally, the computing device determines whether to terminate a suspicious process. The computing device also sends a process termination command if it is determined to terminate the suspicious process.

Abstract: A frequency synthesizer includes a controlled oscillator configured to extend a temperature range and phase noise of the synthesizer without compromising the frequency coverage of the synthesizer. The frequency synthesizer also includes bias generation circuitry that sets a bias current of a charge pump to reduce bandwidth variations of the synthesizer. The frequency synthesizer further includes switching circuitry to dynamically turn a charge pump on and off to reduce effects of current leakage in the charge pump.

Abstract: An antenna receives an RF signal and an RF signal at different frequency bands. An oscillator outputs a local oscillator signal at a frequency f1. An oscillator outputs a local oscillator signal at a frequency f2. A modulator modulates the frequency based on the local oscillator signal at the frequency f1 and the local oscillator signal at the frequency f2, and generates a plurality of local oscillator signals at different frequencies. A frequency converter mixes the plurality of local oscillator signals, at different frequencies, generated by the modulator, with the RF signal and the RF signal, and generates baseband signals of the RF signal and the RF signal. A signal processor performs a predetermined process for the baseband signals generated by the frequency converter.

Abstract: A system and method for a radio controlled clock receiver adapted to extract timing and time information from a phase modulated signal. The official time signal is broadcast from a central location using a modified modulation scheme, which adds phase modulation over the legacy amplitude modulation, such as the legacy WWVB pulse width modulated (PWM)/amplitude shift keying (ASK) modulation, thereby allowing for improved performance. The information modulated onto the phase contains a known synchronization sequence having good autocorrelation properties, error-correcting coding for the time information and notifications of daylight-saving-time (DST) transitions that are provided months in advance. The modulation scheme is based on a form of phase modulation, such as binary-phase-shift-keying (BPSK) or phase reversal keying (PRK).

Abstract: Methods and systems for transmitting and receiving data using audio devices but without being detectable by a human ear are disclosed. For example, a device for transmitting data can include a modulator configured to transform digital data into a modulated signal having a frequency no less than about 20 kHz, and an audio transmitter coupled to an output of the modulator configured to transmit the modulated signal into a sound propagating medium without being detected by a human ear. The methods and systems can be used to perform two-factor authentication for permitting a user to access a remote server or other device.

Abstract: Systems, apparatuses and methods for providing FM phase diversity capabilities are provide. In some aspects, a vehicle system includes a first FM antenna positioned externally of a vehicle and adapted to receive a first FM signal, a radio unit positioned internally of the vehicle and including a display and at least one user control, a cable electrically coupled to the first FM antenna and the radio unit to communicate the first FM signal to the radio unit, and a second FM antenna positioned internally of the vehicle and adapted to receive a second FM signal that is communicated to the radio unit. In another aspect, a radio unit positioned internally of the vehicle may include a printed wire board and a second FM antenna may be positioned on the printed wire board internally of the vehicle and adapted to receive a second FM signal.

Abstract: A system and method for adjusting an energy efficient Ethernet (EEE) control policy using measured power savings. An EEE-enabled device can be designed to report EEE event data. This reported EEE event data can be used to quantify the actual EEE benefits of the EEE-enabled device, debug the EEE-enabled device, and adjust the EEE control policy.

Abstract: Apparatus and methods are disclosed related to phase synchronization in transmitters. One such apparatus includes a wireless transmitter with two or more separate and unrelated local oscillators. The apparatus can provide RF signals to multiple antenna elements, which can be implemented in systems such as beamforming systems or multiple input multiple output (MIMO) systems. A phase difference between local oscillators is determined using outputs of receivers. The phase difference can be used to adjust a phase of signals associated with one or more of the local oscillators, such that the phase of each signal provided to the multiple antenna elements can be aligned.

Abstract: A wireless sensor with analog detector for monitoring the environment surrounding the sensor. The wireless sensor with analog detector comprises a wireless transmitter, a wireless receiver with a quadrature down converter, bank of in phase and quadrature phase constellation level slicers and in phase and quadrature phase symbol generators. A control processor utilizes the received information, received signal strength and timing information to estimate and calculate various environmental parameters which can be used to activate different devices.

Abstract: Values representative of modulation signal components are extracted from a modulated signal. The modulated signal contains a modulation signal. A local clock signal is developed which correlates in time to the modulated signal and has a plurality of non-overlapping phase sectors per cycle. Signal values are acquired from the modulated signal, separately for at least one phase sector of one cycle of the local clock signal. At least two signal values from the same local clock cycle, but different phase sectors are combined to obtain at least one combined signal value representative of a modulation signal component.

Abstract: A near-field RF communicator which is operable to perform a polling process to initiate communication with another near-field RF communicator in near-field range, wherein the near-field communicator is configured to perform a detection process, having a lower energy requirement than a polling process, to determine whether a near-field RF communicator is present in near-field range, and to perform the polling process in the event that the detection process indicates that a near-field RF communicator is present in near-field range.

Abstract: Disclosed here is an interactive audio system and a method of operating the same. In one embodiment, the interactive audio system comprises a processor and a receiving module for receiving a radio frequency (RF) carrier signal associated with a broadcast station. The audio system further comprises a memory storing computer-executable instructions, where the processing module is configured to access and execute the computer-executable instructions to perform a set of acts. The acts include shifting a frequency associated with the received RF carrier signal to an intermediate frequency (IF). The acts include demodulating the frequency shifted portion of the RF carrier signal associated with the broadcast station, the demodulation resulting in an output signal. The acts further include extracting an embedded data from the demodulated output signal, where the embedded data can be utilized to interact with a party associated the embedded data.

Abstract: Techniques to support multihop relay in a wireless communication system are described. In an aspect, a relay station receives data and a first pilot from an upstream station, e.g., a base station or another relay station. The relay station derives a channel estimate based on the first pilot and performs detection for the data based on the channel estimate. The relay station resends the data and sends a second pilot to a downstream station, e.g., a subscriber station or another relay station. Each pilot may be sent in accordance with a pilot format selected for that pilot. The first and second pilots may be sent using the same or different pilot formats. The relay station may receive channel information from the second station and may forward the channel information to the first station and/or select a rate for data transmission to the second station based on the channel information.

Abstract: A method for demodulating phase quadrature modulated signals in a band of channels includes transposing the band around zero, and selecting a channel in the transposed band. A first pair of phase quadrature signals forming a first complex signal is extracted from the selected channel. A second pair of phase quadrature signals forming a second complex signal is extracted from a symmetrical channel of the selected channel. The method further includes establishing a correlation product based on the first and second complex signals, and correcting the two complex signals to make the correlation product tend towards zero.

Abstract: A method and apparatus for reconfiguring a wireless transmit/receive unit (WTRU) are directed to receiving an active set update message indicating that a mode of operation allowing a certain modulation scheme is enabled or disabled and performing at least one of: performing a MAC reset procedure, updating a set of reference enhanced transport format combination indicators (E-TFCIs) and associated power offsets, determining actions related to E-DPCCH boosting, modifying information related to an enhanced dedicated channel (E-DCH), and modifying an index that indicates an E-DCH transport block size table. The update message includes at least one modified information element (IE).

Abstract: Particular embodiments provide power usage management for network devices according to historical traffic pattern data. Network traffic statistics for traffic flowing through a network device may be determined. Traffic pattern for a time period based on the traffic flowing through the network device is then determined. The network device may then manage power based on the pattern. For example, when a pattern indicates that traffic flowing through the network device is light during a time period, then the network device may operate in a lower power mode, such as a standby mode and when it indicates that there is higher usage, the network device may operate in a normal power mode. A power usage policy may be determined based on the historical traffic patterns and is automatically enforced by the network device. The power usage policy also may be dynamically adjusted over time based on network traffic statistics.

Abstract: Efficient carrier aggregation is enabled in a receiver employing a single frequency source, and dividing the frequency source by different frequency dividing factors to generate two or more RF LO frequencies. Received signals are down-converted to intermediate frequencies by mixing with the respective RF LO frequencies. By utilizing only a single high frequency source, embodiments of the present invention avoid spurious and injection locking issues that arise when integrating two or more frequency sources, and additionally reduce power consumption as compared to a multiple frequency source solution.

Abstract: A handheld device includes an FM receiver to receive FM radio signals and a processor that is configured to monitor Radio Data System (RDS) data within FM radio broadcasts and to activate an application when a particular RDS data pattern is received. Methods for recognizing and using the RDS data to activate or initiate applications on the handheld device enable a wide range of uses and new services. A server may provide data to the handheld device in response to queries which are based on or include part of the RDS data. Operating in conjunction with FM radio broadcasters, the handheld device and the server provide a data communication system that can deliver useful services and additional entertainment options for users.

Abstract: An integrated low-IF (low intermediate frequency) terrestrial broadcast receiver and associated method are disclosed that provide an advantageous and cost-efficient solution. The integrated receiver includes a mixer, local oscillator generation circuitry, low-IF conversion circuitry, and DSP circuitry. And the integrated receiver is particularly suited for small, portable devices and the reception of terrestrial audio broadcasts, such as FM and AM terrestrial audio broadcast, in such portable devices.

Abstract: A communication device is disclosed. The device may be in particular a radio transmitter and a receiver that can operate with low power consumption and with improved interference rejection, therefore particularly suitable for use in low-power communication systems, such as wireless sensor networks and wireless body area networks. In one aspect, multiple frequency tones (carriers) are used to carry information from the transmitter, such that a RF signal having multiple radio frequency components is produced and transmitted. In the receiver, an envelope detector is still the RF down-converter. After down-converting intermodulation components are extracted containing amplitude, phase and frequency information of the multiple radio frequency components. This allows the desired signal (the baseband information) to be distinguished from the carriers and unwanted interference.

Abstract: Determining a frequency offset of a received signal utilizing two or more multipath components of the received signal is provided herein. By way of example, the received signal can be correlated with a synchronization sequence in a time domain or a frequency domain, resulting in separation of the two or more multipath components of the received signal. Analysis of at least one of the multipath components can provide a frequency offset of the received signal. Furthermore, by analyzing the multipath components, estimation of the frequency offset can be improved as compared with single-signal analysis techniques.

Abstract: A discrete time receiver includes a low noise transconductance amplifier (LNTA), a discrete time sampler, a passive discrete time circuit, and a switched capacitor amplifier. The LNTA amplifies a received RF signal and provides an amplified RF signal. The discrete time sampler samples the amplified RF signal (e.g., with multiple phases of a sampling clock) and provides first analog samples. The passive discrete time circuit decimates and filters the first analog samples and provides second analog samples. The switched capacitor amplifier amplifies the second analog samples and provides third analog samples. The discrete time receiver may further include a second passive discrete time circuit, a second switched capacitor amplifier, and an analog-to-digital converter (ADC) that digitizes baseband analog samples and provides digital samples. The discrete time receiver can flexibly support different system bandwidths and center frequencies.