Abstract: There are provided a method for constructing a permutation matrix or a check matrix, a processing device, a storage medium and a coding method. The method of constructing a permutation matrix includes: obtaining a base matrix used for the permutation matrix; and lifting the base matrix to obtain the permutation matrix, which includes: obtaining a protograph of the base matrix; and obtaining each macro-cycle in the protograph, and for each macro-cycle in the protograph, determining a size of a short cycle corresponding to the macro-cycle in a Tanner graph of the check matrix corresponding to the permutation matrix by an equivalent cyclic value ECS of the macro-cycle, and determining whether at least one cyclic value in the macro-cycle needs to be set according to the size of the short cycle. The method can efficiently obtain the permutation matrix as required.

Abstract: A method of constructing a base matrix of a permutation matrix, device and medium. The method includes: determining a number Ns of columns corresponding to systematic bits and a number Nrow of rows of the base matrix according to a code rate of the permutation matrix; determining a maximum row weight dc and a total weight range Tweight of the base matrix, wherein the row weight is dc or dc?1; according to Tweight and Nrow, determining a first range R1 of rows with weights of dc?1 and a second range R2 of rows with weights of dc in the base matrix; according to Nrow, Tweight, R1 and R2, filling the systematic bit part in an initial base matrix corresponding to the base matrix to obtain an intermediate base matrix; and performing convergence calculation on it to determine whether it converges, and determining it as the base matrix if it converges.

Abstract: There are provided a channel coding method, a processing device, a communication method and a device. The channel coding method includes: using a generating matrix or a check matrix of QC-LDPC codes to channel-encode or channel-decode a code stream, wherein a code rate of the generating matrix or the check matrix is 1/6, 1/4 or 1/3. The method can be used in a transmission environment with a low signal-noise ratio and a long distance.

Abstract: An automatic gain control system and a control method, a power detector and a radio frequency receiver are provided, wherein the power detector includes: a detection circuit, having a first and second input terminals connected to respective first and second differential output terminals of the trans-impedance amplifier, and configured to sample a peak of a differential output signal of the trans-impedance amplifier along with a clock cycle and provide a differential detection signal at a first output node; a filter circuit converts energy of the differential detection signal obtained at the first output node into an output voltage, so that the power detector may be used to detect an output power of the trans-impedance amplifier and adjust, by a control logic unit, a gain or an output power of a low noise amplifier connected to a radio frequency signal.

Abstract: An apparatus for radio-frequency (RF) oscillation signal production is disclosed. In example implementations, an apparatus includes an oscillator. The oscillator includes multiple oscillation stages that are coupled together in series into a ring. A respective oscillation stage of the multiple oscillation stages includes a transconductance amplifier and a core oscillator. The transconductance amplifier is coupled to a preceding oscillation stage. The core oscillator is coupled to the transconductance amplifier and to a succeeding oscillation stage, with the core oscillator including at least one output node configured to provide a respective output signal. In some implementations, at least one capacitor is coupled across at least the transconductance amplifier. In some aspects, at least one transistor of the transconductance amplifier is implemented with a silicon-on-insulator metal-oxide-semiconductor (SOI MOS) device that includes at least one back-gate terminal.

Abstract: A wireless communication device includes: a housing configured to retain components of the wireless communication device; an antenna unit configured to receive first free-space millimeter-wave signals and convert these signals to first electronic millimeter-wave signals; a processor disposed in the housing; and front-end circuitry communicatively coupled to the antenna unit, the front-end circuitry coupled to the processor by at least one transmission line; where the front-end circuitry is configured to: receive the first electronic millimeter-wave signals from the antenna unit; convert the first electronic millimeter-wave signals to first reduced-frequency signals each having a lower frequency than the first electronic millimeter-wave signals; and convey the first reduced-frequency signals over a same transmission line of the at least one transmission line in a multiplexed manner with different ones of the first reduced-frequency signals having different conveyance characteristics such that the different one

Abstract: An apparatus for radio-frequency (RF) oscillation signal production is disclosed. In example implementations, an apparatus includes an oscillator. The oscillator includes multiple oscillation stages that are coupled together in series into a ring. A respective oscillation stage of the multiple oscillation stages includes a transconductance amplifier and a core oscillator. The transconductance amplifier is coupled to a preceding oscillation stage. The core oscillator is coupled to the transconductance amplifier and to a succeeding oscillation stage, with the core oscillator including at least one output node configured to provide a respective output signal. In some implementations, at least one capacitor is coupled across at least the transconductance amplifier. In some aspects, at least one transistor of the transconductance amplifier is implemented with a silicon-on-insulator metal-oxide-semiconductor (SOI MOS) device that includes at least one back-gate terminal.

Abstract: A dual-band voltage controlled oscillator (VCO) includes: a first oscillator circuit including a first inductor; a second oscillator circuit including a second inductor; a first mode switch configured to electrically connect or disconnect a first output terminal of the first oscillator circuit and a first output terminal of the second oscillator circuit; a second mode switch configured to electrically connect or disconnect a second output terminal of the first oscillator circuit and a second output terminal of the second oscillator circuit; a third mode switch configured to electrically connect or disconnect a first terminal of the first inductor and a first terminal of the second inductor; and a fourth mode switch configured to electrically connect or disconnect a second terminal of the first inductor and a second terminal of the second inductor.

Abstract: A method includes generating a first signal based on a difference between a first frequency of a first voltage controlled oscillator (VCO) and a second frequency of a second VCO. The method further includes determining a gain of the first VCO at least partially based on the first signal.

Abstract: A circuit for generating a local oscillator signal includes: at least one divider module configured to receive an input signal and divide a frequency of the input signal by a division ratio; and a load circuit coupled to the at least one divider module, the load circuit configured to provide balanced current pulses that substantially reduce at least a portion of harmonic current ripples in the local oscillator signal.

Abstract: A dual-band voltage controlled oscillator (VCO) includes: a first oscillator circuit including a first inductor; a second oscillator circuit including a second inductor; a first mode switch configured to electrically connect or disconnect a first output terminal of the first oscillator circuit and a first output terminal of the second oscillator circuit; a second mode switch configured to electrically connect or disconnect a second output terminal of the first oscillator circuit and a second output terminal of the second oscillator circuit; a third mode switch configured to electrically connect or disconnect a first terminal of the first inductor and a first terminal of the second inductor; and a fourth mode switch configured to electrically connect or disconnect a second terminal of the first inductor and a second terminal of the second inductor.

Abstract: A method, an apparatus, and a computer program product are provided. The apparatus provides a VCO signal. The apparatus is a VCO. The apparatus includes a first transconductance circuit. The apparatus further includes a second transconductance circuit coupled with the first transconductance circuit. The second transconductance circuit has a first configuration/mode (e.g., CMOS configuration/mode) and a second configuration/mode (e.g., NMOS configuration/mode or PMOS configuration/mode). The second transconductance circuit is configured to couple an input of the second transconductance circuit to the first transconductance circuit in the first configuration/mode. The second transconductance circuit is configured to isolate the input of the second transconductance circuit from the first transconductance circuit in the second configuration/mode.

Abstract: A method, an apparatus, and a computer program product are provided. The apparatus provides a VCO signal. The apparatus is a VCO. The apparatus includes a first transconductance circuit. The apparatus further includes a second transconductance circuit coupled with the first transconductance circuit. The second transconductance circuit has a first configuration/mode (e.g., CMOS configuration/mode) and a second configuration/mode (e.g., NMOS configuration/mode or PMOS configuration/mode). The second transconductance circuit is configured to couple an input of the second transconductance circuit to the first transconductance circuit in the first configuration/mode. The second transconductance circuit is configured to isolate the input of the second transconductance circuit from the first transconductance circuit in the second configuration/mode.

Abstract: A high-speed current-mode clock driver includes feedback circuitry to maintain the voltage swing of a biasing node within a defined range. The current-mode clock driver includes a PMOS and an NMOS transistor receiving an oscillating signal at their gate terminals. The drain terminals of the PMOS and NMOS transistors are respectively coupled to input terminals of first and second variable conductivity circuits whose output terminals are coupled to a common node. A control circuit increases the conductivities of the first and second variable conductivity circuits in response to decreases in voltage swing of the common node, and decreases the conductivities of the first and second variable conductivity circuits in response to increases in voltage swing of the common node. The first and second variable conductivity circuits are optionally PMOS and NMOS transistors respectively.

Abstract: A method includes generating a first signal based on a difference between a first frequency of a first voltage controlled oscillator (VCO) and a second frequency of a second VCO. The method further includes determining a gain of the first VCO at least partially based on the first signal.

Abstract: A tunable multiphase ring oscillator includes a plurality of stages connected in series in a ring structure, where each stage generating a stage output from a stage input. Each stage of the tunable multiphase ring oscillator includes a plurality of trans-conductance cells, each generating an output from at least one portion of the stage input. Each stage further includes at least one phase shifting module for imparting at least one phase shift to the at least one portion of the stage input, an oscillator unit for generating the stage output from a combination of the plurality of outputs, and means for varying at least one of the plurality outputs so as to adjust a phase of the stage output.

Abstract: A tunable multiphase ring oscillator includes a plurality of stages connected in series in a ring structure, where each stage generating a stage output from a stage input. Each stage of the tunable multiphase ring oscillator includes a plurality of trans-conductance cells, each generating an output from at least one portion of the stage input. Each stage further includes at least one phase shifting module for imparting at least one phase shift to the at least one portion of the stage input, an oscillator unit for generating the stage output from a combination of the plurality of outputs, and means for varying at least one of the plurality outputs so as to adjust a phase of the stage output.

Abstract: A locking range enhancement technique is described that steers away part of the DC current and reuses it to generate more injected AC current to the injection-locked resonator-based frequency dividers (ILFDs). The injection-enhanced ILFDs maintain the key features of ILFDs, which are high speed and low power consumption, without requiring any extra inductive component and thus extra chip area.

Abstract: A locking range enhancement technique is described that steers away part of the DC current and reuses it to generate more injected AC current to the injection-locked resonator-based frequency dividers (ILFDs). The injection-enhanced ILFDs maintain the key features of ILFDs, which are high speed and low power consumption, without requiring any extra inductive component and thus extra chip area.