Abstract: A dynamic module and a decision feedback equalizer are provided. The decision feedback equalizer includes two dynamic modules, which have symmetric circuits and connections. The dynamic module includes a first domino circuit, a second domino circuit, and a storage circuit. In response to a first previous decision bit and a second previous decision bit, a first multiplexer output and a second multiplexer output are generated. The dynamic module alternatively operates in an evaluation period and a precharge period, depending on a clock signal. In the evaluation period, the first and the second multiplexer outputs are updated by the first domino circuit and the second domino circuit. In the precharge period, the first and the second multiplexer outputs are held by the storage circuit.

Abstract: The present disclosure provides an encoding method and an encoder for a (n, n(n?1), n?1) permutation group code in a communication modulation system, in which 2k k-length binary information sequences are mapped to 2k n-length permutation codeword signal points in a n-dimensional modulation constellation ?n. The constellation ?n with the coset characteristics is formed by selecting 2k n-length permutation codewords from n(n?1) permutation codewords of a code set Pn,xi of the (n, n(n?1), n?1) permutation group code based on coset partition. The constellation ?n is a coset code in which 2k1 cosets are included and each coset includes 2k2 permutation codewords, where k=k1+k2, and 2k?n(n?1). The present disclosure utilizes the coset characteristics to realize one-to-one correspondence mapping of the binary information sequence set to the permutation code constellation, so that the time complexity of executing the encoder is at most the linear complexity of the code length n.

Abstract: Examples herein disclose apparatus and systems for hybrid vector based polar modulator schemes that may use a series of polar modulators to create a system of vector modulators. The resulting polar response may be de-composed into the sum of the polar modulators. This approach allows accurate phase modulation in two such links without the need for high resolution AM part to cover the IQ plane of a QAM modulator.

Abstract: An apparatus may include a sampling circuit configured to produce a sequence of input samples based on a continuous time input signal and a sample clock signal, the sampling phase of the sequence of input samples based on a phase control value output by a timing recovery circuit. In addition, the apparatus may include the timing recovery circuit configured to receive the sequence of input samples, detect, for a current sample of the sequence of input samples, a phase offset in the sampling phase of the sequence of input samples, the phase offset being a deviation of the sampling phase from an expected phase, and in response to detecting the phase offset, select a bandwidth for timing recovery. Further, the timing recovery circuit may generate an updated phase control value based on the selected bandwidth for timing recovery.

Abstract: A transmission apparatus that (i) generates a Quadrature Phase Shift Keying (QPSK) modulation signal s1(t) by applying a QPSK modulation scheme to a first data sequence, (ii) generates a 16-Quadrature Amplitude Modulation (QAM) modulation signal s2(t) by applying a 16-QAM modulation scheme to a second data sequence, (iii) generates a transmission signal z1(t) and a second transmission signal z2(t) by applying a phase hopping process, a precoding process, and a power adjust process to the QPSK modulation signal s1(t) and the 16-QAM modulation signal s2(t), wherein an average transmission power of the 16-QAM modulation signal s2(t) being the same as an average transmission power of the QPSK modulation signal s1(t), and (iv) transmits the transmission signal z1(t) from a first antenna at a first time and a first frequency and the second transmission signal z2(t) from a second antenna at the first time and the first frequency.

Abstract: Generating a composite interpolated phase-error signal for clock phase adjustment of a local oscillator by forming a summation of weighted phase-error signals generated using a matrix of partial phase comparators, each of which compare a phase of the local oscillator with a corresponding phase of a reference clock.

Abstract: Approaches for testing phase rotators are provided. A circuit for testing phase rotators includes a compare element including a first input and a second input, wherein the compare element is configured to compare a first phase of a first signal provided at the first input to a second phase of a second signal provided at the second input. The circuit also includes a first test bus connected to the first input and a second test bus connected to the second input.

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to cell recovery techniques. One example method generally includes receiving, at a user-equipment (UE), at least one pilot signal via a secondary cell, receive, via a primary cell, a first message triggering reporting of at least one preferred beam for communication via the secondary cell, determining the preferred beam based on the at least one pilot signal, transmitting, via the primary cell, a report indicating the at least one preferred beam, and communicating data via the secondary cell and via the preferred beam.

Abstract: A communications system that pseudo-randomly dithers the widths of chips that are multiplied by bit symbols for spread spectrum purposes. The system includes a first random sequence generator that generates a first sequence of random numbers at a sample rate and a decision processor responsive to the first sequence of random numbers that generates a separate command at the sample rate each time one of the random numbers exceeds a predetermined threshold. The system further includes a second random sequence generator that generates select random numbers, where the second random number generator changes the select random number each time it receives one of the commands. The system also includes a chip width processor responsive to the random numbers from the second random sequence generator, where the chip width processor selects a new set of chips each having a certain width in response to receiving each random number.

Abstract: A Bluetooth receiving method, a Bluetooth receiver, and a Bluetooth audio device are disclosed in the present invention. The Bluetooth receiving method includes: obtaining load data and a CRC result of the load data, and processing the load data based on signal quality of each of a plurality of data segments in one or more pre-stored load data having failed CRC results when the CRC result of the load data fails and a remaining retransmission time for the load data is no longer available. The signal quality is determined based on a signal angle difference before and after judgment for each of the plurality of data segments in each load data during demodulation. By using solutions provided in the present invention, damage caused by a data loss to a voice or audio can be concealed, and data reliability of limited retransmission of Bluetooth can be effectively improved, thereby improving Bluetooth communication performance.

Abstract: A frequency multiplier comprises a phase generator configured to receive an oscillation signal and to provide at phase generator outputs versions of the oscillation signal, which are phase-shifted with respect to each other. An injection-locked ring oscillator comprises a plurality of stages, wherein each of the phase generator outputs is coupled to a different stage of the plurality of stages for multi-point injection. A combiner combines output signals of the plurality of stages of the injection-locked ring oscillator into a signal having a frequency which is a multiple of a frequency of the oscillation signal.

Abstract: The present disclosure relates to an acoustic position determination system that includes a mobile communication device and at least one base transmitter unit. The mobile communication device is configured to identify a peak in the received signal, and to de-convolve the signal with all codes that are relevant to the area in which the signal is received. A joint likelihood that a potential code is correct is formed by determining a likelihood based on a signal parameter such as signal-to-noise ratio and a likelihood based on time-of arrival information.

Abstract: Embodiments of the present disclosure include techniques for generating accurate time stamps. In one embodiment, a first timing reference signal corresponding to a first clock domain is combined with a first clock signal corresponding to a second clock domain to produce a second timing reference signal that includes quantization noise. The second timing reference signal is filtered to remove the quantization noise and generate a filtered timing reference signal. The filtered timing reference signal may be sampled in the second clock domain to obtain a time stamp. In one embodiment, a phase locked loop (PLL) is used as the filter. The PLL may generate first and second ramps that correspond to time. One of the ramps may be sampled to obtain a time stamp, for example.

Abstract: A first transceiver communicates with a first station in a first network according to a first symbol alignment and includes a detection circuit and a precoding determination circuit. The detection circuit detects a signal in a second network from a second transceiver to a second station in the second network via receive chains, coverage areas of the first and second networks overlapping, and determines a second symbol alignment of the signal based on a preamble of the signal in the second network. The precoding determination circuit is coupled to transmit chains, determines a precoding matrix that creates a null in a location of the second station, and determines the first symbol alignment, which is synchronized with the second symbol alignment. The transmit chains pre-code a signal in the first network using the precoding matrix and align symbols of the signal in the first network according to the first symbol alignment.

Abstract: Disclosed embodiments relate to isolation methods for full-duplex communication. In one example, a full-duplex antenna system includes a Tx (transmit) signal path including one or more elements each, means a power amplifier, one or more filters, and a Tx port of a Tx patch antenna operating at a Tx frequency band to transmit an outgoing signal to a satellite, the one or more elements each further including an Rx (receive) signal path including a low noise amplifier driven by an Rx port of an Rx patch antenna operating at an Rx frequency band to receive an incoming signal from the satellite, the Rx frequency band being separated by a guard band from the Tx frequency band, wherein the filters together with a physical separation between the Tx and Rx signal paths provide sufficient isolation to reduce coupling between the Tx signal path and the Rx signal path, allowing the full-duplex antenna system to operate in full-duplex.

Abstract: A low voltage drive circuit (LVDC) includes a drive sense circuit operable to convert an analog outbound data into an analog transmit signal that is transmitted on a bus, receive an analog receive signal from the bus, and convert the analog receive signal into the analog inbound data. The LVDC further includes a transmit digital to analog circuit configured to convert transmit digital data into the analog outbound data. The LVDC a receive analog to digital circuit that includes an analog to digital converter operable to convert the analog inbound data into digital inbound data, a digital filtering circuit operable to filter the digital inbound data to produce a set of frequency domain digital data signals, and a data formatting module operable to convert the set of frequency domain digital data signals into received digital data.

Abstract: The present disclosure provides a method for compensating gain flatness of a transceiver including: a method for compensating gain flatness of a receiver, which compensates gain flatness of a receiving channel by using a complex-coefficient FIR filter in digital domain; and a method for compensating gain flatness of a transmitter, which compensates gain flatness of a transmitting channel by using a complex-coefficient FIR filter in digital domain. The method according to the present disclosure can balance compensation accuracy and calculation amount flexibly, and can focus on compensating the gain flatness at an edge of a frequency band, obtaining good performance with less calculation amount.

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to cell recovery techniques. One example method generally includes receiving, at a user-equipment (UE), at least one pilot signal via a secondary cell, receive, via a primary cell, a first message triggering reporting of at least one preferred beam for communication via the secondary cell, determining the preferred beam based on the at least one pilot signal, transmitting, via the primary cell, a report indicating the at least one preferred beam, and communicating data via the secondary cell and via the preferred beam.

Abstract: A power amplifier system includes an input operable to receive an original value that reflects information to be communicated and an address data former operable to generate a digital lookup table key. The power amplifier system also includes a predistortion lookup table coupled to the address data former and a power amplifier having an output and coupled to the predistortion lookup table. The power amplifier system further includes a feedback loop providing a signal associated with the output of the power amplifier to the predistortion lookup table and a switch disposed in the feedback loop and operable to disconnect the predistortion lookup table from the output of the power amplifier.

Abstract: Systems, devices, and methods are provided for mixed-mode signal processing that achieves unprecedented levels of out-of-band and in-band interference suppression. Embodiments of the present disclosure mitigate the effects of blockers and jammers, which have surfaced as issues in emerging cognitive radio systems as those networks struggle to co-exist with licensed and unlicensed users.