9 results about "Polar modulation" patented technology

A method is disclosed for programming analog-valued weights in a non-volatile memory array using feedback-based estimation and adaptive pulse modulation. The method includes initializing a target weight, applying one or more programming pulses to a memory cell, estimating a weight state of the memory cell based on analog-to-digital conversion, determining a residual error between the estimated weight state and the target weight, and computing a subsequent programming pulse based on the residual error. The subsequent pulse may be adjusted by selecting a programming voltage from a quantized set of levels responsive to the recent weight response dynamics. The programming process may iterate until convergence may be achieved within a defined threshold. The technique supports precise control of conductance programming using closed-loop feedback and may be compatible with pulse-width, amplitude, and polarity modulation schemes.

The chaos filter-based polarity inversion time index multicarrier communication method and system of the present application comprises the following steps: generating LP bits and performing polarity conversion, and sending the polarity-converted LP bits into a chaos shaping filter; generating HP bits, performing polarity conversion and series-parallel conversion on the HP bits; generating index bits, performing polarity inversion on corresponding time periods in local time periods of each polarity modulation signal, and obtaining a final modulation signal; loading the reference signal and the final modulation signal into corresponding subcarriers, respectively; multiplying a received signal with a corresponding synchronous subcarrier; performing 0 threshold decision on the reference branch sampling signal; and recovering the HP bits and the index bits according to the detection result. The present application utilizes a chaos shaping filter to generate a chaos signal bearing low-priority LP bits, and transmits a reference signal and an information signal in a multicarrier mode; the joint transmission of multiple types of information is realized, and the transmission rate and energy efficiency of the system are improved.

The invention relates to a differential Mach-Zehnder electro-optical modulator based on frequency equalization. The modulator comprises an input waveguide branch, an output waveguide branch, a Mach-Zehnder upper phase shift arm, a Mach-Zehnder lower phase shift arm and a traveling wave electrode, each phase shift arm comprises a basic modulation region, a like-polarity modulation region and a reversed-polarity modulation region which are sequentially connected in series and are spatially arranged in parallel to form a folded arrangement structure; the traveling wave electrode is used for applying a first polarity electric field to the basic modulation area and the homo-polarity modulation area, and applying a second polarity electric field opposite in direction to the reversed polarity modulation area. By adopting the scheme, frequency equalization phase modulation is realized in a compact folding structure, and the electro-optical bandwidth of the modulator can be obviously expanded while the size of the device is reduced.

The invention discloses a thermal balance control method, system, device and equipment for bridge arm switching, and a medium, and the method comprises the steps: constructing a control vector set based on a modulation wave, generating a first control command and a second control command of a positive half cycle of the modulation wave according to the control vector set, generating a third control command and a fourth control command of the negative half cycle of the modulation wave according to the control vector set; obtaining heat data of the H-bridge circuit; and according to the heat data, dynamic switching of a first control command and a second control command is carried out in the positive half cycle of the modulating wave, and dynamic switching of a third control command and a fourth control command is carried out in the negative half cycle of the modulating wave. Bridge arm thermal balance can be realized while the advantage of high efficiency of unipolar modulation is kept, so that the reliability and the power density of a power supply system are improved.

A LiFi transmitter has first and second light emitting elements with different optical characteristics (wavelengths or polarizations). A bias circuit sets an operating point and sets bias conditions (e.g. a bias current) for the first and second light emitting elements. A first polarity of a modulation current (e.g. positive) is driven through the first light emitting element and a second polarity of the modulation current (e.g. negative) is driven through the second light emitting element, thereby to implement bipolar OFDM modulation. A corresponding receiver has first and second light sensing elements with different sensing characteristics and a bias circuit. A sensed difference current signal is amplified, and it is generated by the first or second light sensing element depending on the polarity of the OFDM modulation, thereby to implement bipolar OFDM reception.

A method is disclosed for programming analog-valued weights in a non-volatile memory array using feedback-based estimation and adaptive pulse modulation. The method includes initializing a target weight, applying one or more programming pulses to a memory cell, estimating a weight state of the memory cell based on analog-to-digital conversion, determining a residual error between the estimated weight state and the target weight, and computing a subsequent programming pulse based on the residual error. The subsequent pulse may be adjusted by selecting a programming voltage from a quantized set of levels responsive to the recent weight response dynamics. The programming process may iterate until convergence may be achieved within a defined threshold. The technique supports precise control of conductance programming using closed-loop feedback and may be compatible with pulse-width, amplitude, and polarity modulation schemes.

The invention discloses a social recommendation denoising method based on a ternary resonance principle, bipolar perception and a polar modulation graph neural network. The method comprises the following steps: firstly, according to a ternary resonance principle, performing prior auditing on a social link by analyzing a user-article ternary interaction structure, and generating a topological mask to identify a high-confidence link; secondly, refining the original social graph by using the mask, and injecting the purified relationship as a structured prior into a user-article interaction graph for heterogeneous fusion; then, on the enhanced graph, through a bipolar perception and modulation graph neural network, utilizing a polarization modulation ordinal number to dynamically regulate and control information flow, and learning node characterization capable of distinguishing whether a user is good or not; and finally, constructing a composite objective function containing polarization ordinal number constraint and Bayesian personalized ordering, and optimizing the model by minimizing the function. Social noise can be effectively filtered, user positive and negative feedback is deeply modeled, and recommendation accuracy is remarkably improved.

This application discloses a synchronization signal processing method based on differential symmetric polarization sequences, comprising: the transmitter performing m symmetric polarization processing on the basic sequence to generate a signal of length 2. m The symmetric polarization sequence; through differential polarization modulation, the M basic sequences are combined to generate a synchronization frame of length M×N, where M=2. m +1, N is the length of the basic sequence; the receiving end performs time-domain matched filtering on the received signal based on the locally stored basic sequence to obtain a filtered signal; the filtered signal is split into two paths, one path is passed directly, and the other path is delayed by N clock cycles. The two signals are multiplied by conjugate, and the resulting primary processed signal is subjected to m iterations of delay-shift phase addition and subtraction processing to output the final correlation peak and determine the synchronization position. This invention also discloses a synchronization signal processing device, corresponding equipment, and storage medium based on differential symmetric polarization sequences. This application effectively overcomes carrier frequency offset and DC bias interference, saving hardware logic resources.

This application discloses a method, system, device, equipment, and medium for thermal equalization control of bridge arm switching. The method includes constructing a control vector set based on a modulation wave; generating a first control command and a second control command for the positive half-cycle of the modulation wave according to the control vector set; generating a third control command and a fourth control command for the negative half-cycle of the modulation wave according to the control vector set; acquiring thermal data of the H-bridge circuit; dynamically switching the first and second control commands during the positive half-cycle of the modulation wave according to the thermal data; and dynamically switching the third and fourth control commands during the negative half-cycle of the modulation wave. This method can achieve bridge arm thermal equalization while retaining the high efficiency advantages of unipolar modulation, thereby improving the reliability and power density of the power supply system.