Intel Corporation

Apple Inc.

Rotem Avivi

Michael Kerner

Assaf Gurevitz

Yuval Shamuel Lomnitz

Ilan Sutskover

Tzahi Weisman

Yair Dgani

Ofir Degani

Uri Perlmutter

Giuseppe Li Puma

Rotem Banin

Eyal Krupka

Elan Banin

Bruno Jechoux

Evgeny Shumaker

Gil Horovitz

Eshel Gordon

Assi Jakoby

Ayelet Doron

Aryeh Farber

Shimon Solodkin

Tami Sela

Systems and methods configured to cancel spurs in a phase locked loop (PLL) system are provided. A method configured to cancel spurs in a PLL system includes receiving a PLL signal from the PLL system; determining an estimated spur frequency of a spur in the received PLL signal based on the received PLL signal; and canceling the spur in the received PLL signal based on the estimated spur frequency.

Spur frequency estimation inside digital phase locked loop

A time-to-digital converter is provided. The time-to-digital converter includes a delay circuit configured to iteratively delay a reference signal for generating a plurality of delayed reference signals. Further, the time-to-digital converter includes a plurality of sample circuits each configured to sample an oscillation signal based on one of the plurality of delayed reference signals. The time-to-digital converter additionally includes a control circuit configured to de-activate at least one of the plurality of sample circuits based on a predicted value of the phase of the oscillation signal.

Time-to-digital converter, digital phase-locked loop, method for operating a time-to-digital converter, and method for a digital phase-locked loop

A spur cancelation system includes error circuitry, inverse spur circuitry, and injection circuitry. The error circuitry is configured to generate an error signal based at least on a first transceiver signal in a transceiver signal processing chain. The inverse spur circuitry is configured to, based at least on the error signal, determine a gain and a phase of a spur signal in the transceiver signal and generate an inverse spur signal based at least on the gain and the phase of the spur signal. The injection circuitry is configured to inject the inverse spur signal to cancel a spur in a second transceiver signal in the transceiver signal processing chain.

Spur cancelation using inverse spur injection

A synthesizer circuit to generate a local oscillator carrier signal for a baseband signal includes a controlled oscillator comprising a phase lock loop and an oscillator configured to generate an oscillating signal. A pulling compensation circuit is configured to generate a correction signal for a present output of the phase locked loop using information on an error of the oscillating signal, information on a present sample of a baseband signal and a preceding correction signal for a preceding output of the phase locked loop.

Method to mitigate undesired oscillator frequency modulation effects in-side a synthesizer due to interference signals and synthesizer circuit

Embodiments related to systems, methods, and computer-readable media to enable a digital phase locked loop are described. In one embodiment, a digital synthesizer comprises a digital phase locked loop with detection circuitry to calculate an estimate of a magnitude and a phase of a spurious response from an error signal within the digital phase locked loop. The digital phase locked loop further comprises generation circuitry to generate an inverse spur based on the estimate of the magnitude and the phase, and further comprises injection circuitry to inject the inverse spur into the digital phase locked loop. In some embodiments, least mean squares (LMS), recursive least squares (RLS), or other such adaptation is used to estimate the magnitude and phase of the spurious response.

Methods and devices for spur cancellation in digital phase locked loops

An interfering signal from a co-running modem is filtered using a notch filter to cancel high frequency harmonic interference to a received radio frequency (RF) signal. Thereafter, a metric scaling and tone nulling are performed in the received RF signal to further eliminate residual harmonic frequencies.

Cellular up-link harmonic spurs mitigation in Wi-Fi and bluetooth receivers

Some demonstrative embodiments include devices, systems and/or methods of combining received wireless communication signals. For example, a device may include a radio-frequency (RF) combiner to combine first and second wireless communication RF signals of a wireless communication frame received via first and second respective antennas, into a combined signal; and a base-band phase estimator to estimate a phase difference between the first and the second antennas, and to provide to the RF combiner a feedback corresponding to the phase difference, wherein the radio-frequency combiner is to combine the first and the second RF signals according to the feedback.

Device, system and method of combining received wireless communication signals

A system and a method in which a first frequency correction is determined for a frequency of a local oscillator with respect to a frequency of a first time slot of a received signal. The first frequency correction is applied to adjust the frequency of the local oscillator. A second frequency correction is determined for the frequency of the local oscillator with respect to a frequency of a second time slot of the received signal. The second frequency correction is applied to adjust the frequency of the local oscillator. A third frequency correction is determined for the frequency of the local oscillator with respect to a frequency of a third time slot and a fourth time slot of the received signal, and the third frequency correction is applied to adjust the frequency of the local oscillator.

Efficient method to overcome frequency errors within four time slots

A method and system for adaptive mitigation of noise interference in a receiver. In one embodiment of the invention, the receiver determines the type of the dominant noise interference among one or more noise interferences. The receiver determines or optimizes the estimation and averaging process of the noise covariance matrix based on the type of the dominant noise interference in one embodiment of the invention. This allows dynamic selection and adaptation of the noise estimate covariance matrix based on the noise type in one embodiment of the invention.

Method and apparatus for adaptive mitigation of noise interference

A method of identifying a precoding matrix corresponding to a wireless network channel comprises the steps of identifying a capacity metric that includes an identity matrix, approximating the capacity metric using an approximation metric that ignores the identity matrix, using the approximation metric to search over all matrices in a matrix codebook in order to identify a particular precoding matrix that increases a capacity of the wireless network channel, and transmitting across the wireless network channel a matrix index that corresponds to the particular precoding matrix. Additional techniques for identifying precoding matrices are also described herein, as is a method of approximating a capacity of a wireless network channel in a wireless network.

Method of identifying a precoding matrix corresponding to a wireless network channel and method of approximating a capacity of a wireless network channel in a wireless network

An embodiment of the present invention provides an apparatus that may include a transceiver operable to communicate with a receiver in a wireless network and adapted to select an optimal mode for transmissions, wherein the receiver estimates the optimal mode and feeds it back to the transceiver which changes a transmitted mode accordingly and wherein the optimal mode is based on a predetermined metric based on a performance equation that puts a threshold to separate between a high correlated signal to low correlation signal.

Apparatus, systems and methods for switching MIMO transmission techniques in wireless communication systems

Briefly, a method an apparatus and a wireless communication device are provided. The wireless communication device includes a receiver to receive complex sequences of symbols. The receiver includes an estimator to estimate one or more channel taps. The estimator includes a memory to store at least a portion of one or more calculated values of an estimation matrix and is capable to estimate the one or more channel taps based on a stored portion of calculated values of the estimation matrix.

Method and apparatus to estimate channel tap

In a structure having a fractional-N synthesizer driven by a voltage controlled oscillator, frequency accuracy is maintained by first using the fractional-N synthesizer to correct large frequency errors and then slowly transferring correction from the fractional-N synthesizer to the voltage controlled oscillator a little at a time.

Method and apparatus for efficiently applying frequency correction

Methods, apparatuses, and systems to determine whether a transmission signal block was fully transmitted are described herein. The determination may be made at least in part by calculating one or more bit error probabilities for one or more to be transmitted bursts of the transmission signal block.

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Petah-Tiqwa, Israel

Rotem Avivi