9 results about "Frequency shaping" patented technology

The application provides a communication method and device, belonging to the communication technical field, to improve the sensing performance while ensuring the communication performance of the communication system. In the method, when the elements in [b(n)] satisfy the first feature, the second feature, the third feature or the fourth feature, the optimal compromise between the communication and sensing performance can be achieved, so that the sensing performance can be improved while ensuring the communication performance of the communication system, that is, the joint optimal performance of communication and sensing is achieved by adaptively selecting the optimal frequency shaping coefficient. In addition, because the elements in [a(n)] satisfy that the user signal can be spread over the entire carrier bandwidth, the first signal determined by [a(n)] can make each user signal occupy the entire carrier bandwidth in a multi-user scenario, so as to maintain the sensing accuracy and resolution.

An implantable neuromodulation system is provided comprising at least one stimulation microelectrode, at least one microelectrode, and a frequency-shaping amplifier (FSA). The at least one stimulation microelectrode is configured to deliver a desired electrical stimulation to a neuronal population. The at least one recording microelectrode is configured to receive neural signals from the neuronal population. The FSA is coupled to the at least one recording microelectrode. The FSA is configured to allow for simultaneous electrical recording and electrical stimulation of the neuronal population.

The present invention provides a power control method and apparatus for an underwater thruster motor, comprising: acquiring underwater environmental pressure values ​​and underwater thruster motor stator temperature values ​​to generate a comprehensive compensation coefficient; identifying the influence of hydrodynamic disturbances on motor flux linkage based on the rotational speed signal fed back by the underwater thruster motor rotor position sensor, and dynamically correcting flux linkage commands using a sliding mode variable structure control algorithm to suppress flux linkage distortion; adaptively allocating the current components of the motor stator direct axis and quadrature axis according to the thrust requirements of the vehicle, combined with the comprehensive compensation coefficient and the corrected flux linkage commands, and generating a basic drive signal; performing high-frequency shaping on the basic drive signal to output an adapted voltage pulse sequence, and controlling the motor electromagnetic torque to track the target value corresponding to the thrust requirements in real time. This invention improves the operational stability and control accuracy of the underwater thruster motor.

This application belongs to the field of communication technologies, and provides a communication method and apparatus, to improve sensing performance while communication performance of a communication system is ensured. In the method, when elements in [b(n)] meet a first feature, a second feature, a third feature, or a fourth feature, an optimal compromise between communication and sensing performance can be implemented, so that the sensing performance can be improved while the communication performance of the communication system is ensured, that is, an optimal frequency shaping coefficient is adaptively selected to achieve joint optimal performance of communication and sensing.

The application relates to a method for constructing an ultra-low-loss via hole on a thick electrode by using time / frequency shaping laser, and belongs to the field of electrode material laser processing. The implementation method is as follows: a birefringent crystal, BBO and a high-power objective are used to shape a traditional Gaussian laser into a short-wavelength laser with a certain time delay and focal depth; a harmonic beam splitter is used to solve the safety problem caused by reflected light; a light-limiting diaphragm is used to ensure that laser with high single-pulse energy is used while the spot diameter is reduced, so that an ultra-low-loss low-tortuosity pore structure is prepared on the thick electrode, and the loss is controlled within 1%. The application can solve the safety problem caused by the reflected energy of the frequency-doubled laser, reduce the problem that the introduced pore loss of the thick electrode is too high and cannot be calendered, solve the problem of capacity and rate performance reduction of the thick electrode, and improve the power density, energy density and cycle life of the thick electrode.

This invention provides a 16-channel neural recorder, comprising: a chip integrating an analog front-end and a polarized transmitter, and a software-defined receiver as a transponder. The chip further includes a data buffer, a channel encoder, a DMA that transmits data to the data buffer, and the channel encoder for packetizing and channel coding according to register file configuration parameters. A modulator receives the output of the channel encoder, modulates it, and inputs it to a frequency shaping filter. The output of the frequency shaping filter is then fed to the polarized transmitter. The receiver is based on an FPGA and includes a pairwise connected RF front-end, an FPGA, and an ARM processor. Experimental results show that the input reference noise of the AFE is 2.87 μVrms, and the energy efficiency of the transmitter is 2.8 nJ / bit. The chip consumes a total power of 5.47 mW under maximum load. In vivo experiments on rats demonstrate good system usability.

This invention discloses an oscillator detection circuit, relating to the field of integrated circuit technology, to solve the problem of poor accuracy in oscillator detection and judgment by the main control chip due to existing detection circuits. The detection circuit includes a frequency shaping circuit, a high-voltage generation circuit, a negative-voltage generation circuit, and a voltage conversion circuit connected in stages. The frequency shaping circuit shapes the oscillator's output signal; the high-voltage generation circuit processes the output signal of the frequency shaping circuit to generate a high-voltage signal; the negative-voltage generation circuit provides a negative bias to the detection circuit; and finally, the voltage conversion circuit converts the received signal into a voltage output related to the oscillator frequency. This improves the accuracy of oscillator detection and judgment by the main control chip.

The invention provides a communication method and device, belongs to the technical field of communication, and is used for improving the sensing performance under the condition of guaranteeing the communication performance of a communication system. In the method, when elements in the method meet a first feature, a second feature, a third feature or a fourth feature, optimal compromise between communication and sensing performance can be realized, so that the sensing performance can be improved under the condition of ensuring the communication performance of a communication system, namely, the sensing performance can be improved by adaptively selecting an optimal frequency shaping coefficient. And the joint optimal performance of communication and sensing is realized. Besides, the user signals can be expanded on the whole carrier bandwidth due to the fact that the elements meet the requirements, and therefore the user signals can occupy the whole carrier bandwidth and maintain sensing precision and resolution in the multi-user scene by determining the first signal.

The application discloses a kind of based on cross-scale space-time frequency shaping femtosecond laser's conformal antenna component manufacturing system and method, belong to micro-nano processing technical field.The system includes ultrafast laser excitation module, laser pulse time / frequency shaping module, pulse detection module, online monitoring module and focusing high-speed scanning galvanometer module.Through the system, realize high selectivity, large format, three-dimensional precision machining to conformal antenna circuit pattern, ensure that substrate is undamaged.Processing process is combined with femtosecond laser time-frequency shaping technology, adjustable pulse sequence and high-speed galvanometer system are used to realize the layering scanning and accurate removal of heterogeneous multilayer structure, avoid the problems of material damage, low size accuracy and other problems existing in prior art.The application also integrates online depth monitoring function, significantly improves processing efficiency and forming quality, and is suitable for high-precision patterning of complex curved surface heterogeneous thin film materials.