摘要:
Film bulk acoustic resonators (FBARS) have resonant frequencies that vary with manufacturing variations, but tend to be matched when in proximity on an integrated circuit die. FBAR resonant frequency is determined using a fractional-N synthesizer and comparing phase/frequency of an output signal from the fractional-N synthesizer to a reference. The reference may be derived from a low frequency crystal oscillator, an external signal source, or a communications signal.
摘要:
Film bulk acoustic resonators (FBARS) have resonant frequencies that vary with manufacturing variations, but tend to be matched when in proximity on an integrated circuit die. FBAR resonant frequency is determined using a fractional-N synthesizer and comparing phase/frequency of an output signal from the fractional-N synthesizer to a reference. The reference may be derived from a low frequency crystal oscillator, an external signal source, or a communications signal.
摘要:
Briefly, in accordance with one or more embodiments, in a pulse position and pulse position modulation out-phasing transmitter, the range of the phase angle, theta, may be divided into more than one range to drive a first power amplifier with a first range of theta, and to drive a second power amplifier with a second range of theta. In one or more embodiments, a main power amplifier is driven with a first phase range having a higher probability density function, and an overload power amplifier is driven with a first phase range having a lower probability density function. In one or more embodiments, a full adder may be used to combine the two phases wherein the sum signal is used to drive the main power amplifier, and the carry signal is used to drive the overload power amplifier.
摘要:
In some embodiments, provided are calibration techniques for measuring mismatches between TDL delay stage elements, and in some cases, then compensating for the mismatches to minimize performance degradation.
摘要:
Briefly, in accordance with one or more embodiments, in a pulse position and pulse position modulation out-phasing transmitter, the range of the phase angle, theta, may be divided into more than one range to drive a first power amplifier with a first range of theta, and to drive a second power amplifier with a second range of theta. In one or more embodiments, a main power amplifier is driven with a first phase range having a higher probability density function, and an overload power amplifier is driven with a first phase range having a lower probability density function. In one or more embodiments, a full adder may be used to combine the two phases wherein the sum signal is used to drive the main power amplifier, and the carry signal is used to drive the overload power amplifier.
摘要:
In some embodiments, provided are calibration techniques for measuring mismatches between TDL delay stage elements, and in some cases, then compensating for the mismatches to minimize performance degradation.
摘要:
Briefly, in accordance with one or more embodiments, a radio device comprises an analog front end comprising a radio to transmit and/or receive radio-frequency signals, and a programmable engine coupled to the analog front end. The programmable engine is capable of being programmed to perform one or more tests on the analog front end and includes a reconfigurable data path reconfigurable by the programmable engine to perform one or more tests on the analog front end.
摘要:
Briefly, in accordance with one or more embodiments, a radio device comprises an analog front end comprising a radio to transmit and/or receive radio-frequency signals, and a programmable engine coupled to the analog front end. The programmable engine is capable of being programmed to perform one or more tests on the analog front end and includes a reconfigurable data path reconfigurable by the programmable engine to perform one or more tests on the analog front end.
摘要:
Technology to adaptively sectorize a spatial region for parallel multi-user transmissions is disclosed. In an example, a node (e.g., evolved Node B (eNB)) can include computer circuitry configured to: Generate a set of precoding matrices for a set of beam cones in the spatial region; and generate a beam cone for multi-user beamforming transmissions using system information for the beam cone. A precoding matrix in the set of precoding matrices can be used for each beam cone, and each beam cone can cover a beam cone spatial region that differs from another beam cone spatial region of another beam cone in the spatial region. Each beam cone can include system information that differs from the system information of the other beam cones in the spatial region.
摘要:
Device, system, and method of flicker noise mitigation. For example, an apparatus includes a digital adaptive filter to mitigate flicker noise from a received Orthogonal Frequency-Division Multiplexing (OFDM) signal, wherein the digital adaptive filter includes: a prediction filter to estimate a value of the flicker noise based on linear combination of past low-pass filtered signal samples; a trainer sub-circuit to modify a coefficient of the prediction filter based on a difference between: a known incoming signal filtered by the prediction filter in a training stage, and a locally-generated reference copy of the known signal; a first path including a first pair of analysis-synthesis filters; and a second, parallel, path including a second pair of analysis-synthesis filters and further including the prediction filter.