10 results about "Bandwidth efficient" patented technology

This invention discloses a high-efficiency power amplifier with extended harmonic modulation bandwidth and its modulation method. A harmonic control circuit unit is added to the input terminal of the final stage die of the power amplifier. The extended harmonic control unit includes a second harmonic modulation circuit and a first parasitic element of the power amplifier back hole. The second parasitic element of the source back hole of the final stage transistor participates in modulation. Considering the parasitic effect of the power amplifier and the back hole at the source of the die, the harmonic modulation bandwidth is further widened by adjusting the harmonic control circuit unit, which effectively improves the working efficiency of the amplifier.

The scheme discloses a POS machine miniaturization large-bandwidth high-efficiency antenna, which uses a small antenna size to excite a low-frequency working mode of a mainboard, uses components such as a camera FPC and an NFC coil which are not conducive to the antenna to expand the frequency, realizes better low-frequency bandwidth, changes the disadvantage into an advantage, optimizes the shape of the antenna working at a high frequency and places the antenna at a suitable position to excite the NFC coil and the rear camera FPC to generate a low-frequency resonance, thereby expanding the antenna bandwidth to a low frequency enough to cover common low-frequency communication frequency bands, and finally realizes a very small space-occupied and very high-efficiency large-bandwidth antenna.

The embodiment of the invention discloses a time slot allocation method and system. The method comprises the following steps: in response to a time slot allocation instruction, obtaining current occupation states of a plurality of time slots, determining a service demand of a first power service, and predicting a time slot demand of the first power service based on the service demand; according to the time slot demand and the current occupancy state, a target allocation strategy is determined from a preset idle time slot allocation strategy and an occupied time slot allocation strategy, the idle time slot allocation strategy is a strategy for allocating idle time slots in the multiple time slots, and the occupied time slot allocation strategy is a strategy for allocating occupied time slots in the multiple time slots; the occupied time slot allocation strategy is a strategy for recovering and allocating occupied time slots in a plurality of time slots; and determining a target time slot allocated to the first power business from the plurality of time slots based on the target allocation strategy. According to the technical scheme provided by the embodiment of the invention, resources can be fully utilized, and key service bandwidth can be effectively guaranteed.

The invention relates to a micro-cavity modulator and a design method thereof, in particular to an electro-optical co-optimization design method of a high-bandwidth micro-cavity modulator based on an inductance peaking effect and the high-bandwidth micro-cavity modulator, and solves the problem that the existing design method of the micro-cavity modulator does not combine the inductance peaking effect with the photoelectric characteristic of the micro-cavity modulator. And the effective peaking effect and the effective bandwidth expansion of the micro-cavity modulator are difficult to realize at the same time. According to the method, the micro-cavity modulator is equivalent to the optical equivalent circuit model, so that the micro-cavity modulator and the inductor can be designed in the same simulation environment, and overall co-optimization of an electrical device and an optical device is realized; meanwhile, through deep coupling of the inductance peaking effect and the optical equivalent circuit model of the micro-cavity modulator, the dual targets of bandwidth expansion and group delay leveling of the micro-cavity modulator are achieved at the same time.

The invention relates to a multi-tenant isolation control system based on QUIC proxy optimization, and belongs to the field of computer networks. The system comprises an access layer, a control layer and a data layer, the access layer is responsible for protocol processing, the control layer realizes strategy management, the data layer completes isolated forwarding, and the system realizes tenant identity binding and connection management, a tenant resource isolation method, a tenant personalized strategy and tenant monitoring and recording. Through the kernel-level isolation technology, the cross-tenant resource interference rate is effectively reduced, the bandwidth of key tenants is effectively guaranteed, various scene requirements are met, the multi-tenant transmission performance is improved, personalized requirements are supported to rapidly fall into the ground, the monitorability and compliance are enhanced, and the resource utilization rate is optimized.

The invention relates to the technical field of microwave communication, and discloses a high in-band rejection broadband band elimination filter. The filter is based on a micro-strip resonator, and a micro-strip open-circuit branch knot is loaded in the middle of the micro-strip resonator to form an axial symmetry structure. The structure is divided into three groups of parts with the same characteristic impedance along a symmetry axis, and the working bandwidth and the in-band suppression level of the filter can be flexibly adjusted by independently adjusting the impedance ratio of each group. The structure is simple, narrow slits do not need to be machined, and the machining difficulty and cost are remarkably reduced. Compared with the prior art, about 90% of relative working bandwidth can be obtained while 40dB high in-band suppression is realized, and the problem that high in-band suppression and broadband performance are difficult to consider at the same time is effectively solved.

The invention discloses a high-efficiency power amplifier for expanding harmonic modulation bandwidth and a modulation method thereof, a harmonic control circuit unit is added to the input end of a final-stage tube core of the power amplifier, and an expansion harmonic control unit comprises a second harmonic modulation circuit and a first parasitic element of a back hole of the power amplifier. The second parasitic element of the source electrode back hole of the last-stage transistor participates in modulation, the parasitic effect of the back holes at the power amplifier and the source electrode of the tube core is considered, the harmonic modulation bandwidth is further expanded by adjusting the harmonic control circuit unit, and the working efficiency of the amplifier is effectively improved.

The invention discloses a short packet wireless communication bit error rate-time delay cross-layer analysis method, which is oriented to a short packet URLLC scene under a single-user Nakagami-m block fading channel, considers the random arrival and queuing time delay of a service, and realizes the cross-layer analysis of the bit error rate-time delay of the short packet wireless communication based on a finite block length theory and an effective bandwidth / effective capacity theory. Under the condition of limited block length coding, the reachable rate under the bit error rate constraint is embedded into the service process, and the approximate relation between the bit error rate and the delay violation probability is deduced by combining statistical QoS analysis means such as effective bandwidth / effective capacity and the like. According to the method, an executable calculation process of system parameters-reachable service capability / maximum bearable arrival rate-delay violation probability is established, so that the dependence on large-scale simulation is reduced while the evaluation accuracy is ensured, and a basis is provided for engineering test calculation and parameter configuration of the short packet URLLC system under strict delay and ultrahigh reliability requirements.

The invention relates to the technical field of power system relay protection, discloses a transformer transient waveform full-bandwidth reduction method and system, and aims to accurately represent amplitude-frequency characteristics and bandwidth limitation of a transformer by constructing a frequency domain transfer function model of the transformer. After a time domain waveform collected by a mutual inductor is converted into broadband frequency domain information, inverse operation is carried out on the broadband frequency domain information and a transfer function model subjected to regularization processing, signal attenuation outside an effective bandwidth is compensated, high-frequency and low-frequency transient components filtered or distorted by hardware are recovered, and therefore the bandwidth bottleneck of a physical sensor is broken through. And then, carrying out inverse transformation on the compensated broadband frequency domain information to obtain a high-fidelity reduced time domain waveform signal. The waveform signal is closer to a real fault signal in the aspects of shape, amplitude and transient characteristic time sequence, the problem that full-bandwidth effective detection is difficult to realize in the process of detecting the fault waveform by using a mutual inductor is solved, and an accurate data basis is provided for subsequent fault identification and traceability analysis thereof.

This invention provides a networked radar decision-making method based on an improved MADDPG, which balances resolution and anti-interference performance, and relates to the field of radar anti-interference technology. First, an adversarial scenario is constructed between the networked radar and a multi-point broadband frequency-sweeping jammer, signal distribution is analyzed, and overlap coefficients are established. Second, the radar cooperative scheduling process is modeled as a multi-agent partially observable Markov decision process, constructing a composite reward function that balances detection resolution and anti-interference performance. Then, a multi-agent deep deterministic policy gradient algorithm is used for network training, and a self-attention mechanism is introduced in the value evaluation to extract mutual interference topology features, obtaining the frequency agility strategy for each radar. This invention overcomes the limitations of traditional discrete frequency hopping, enabling the radar to adaptively utilize fragmented spectrum to elastically expand bandwidth under conditions of no online communication, effectively achieving a comprehensive improvement in high-precision detection and high anti-interference survivability.