23results about How to "Improve reception quality" patented technology

The invention relates to the technical field of data packet transmission, and discloses a data packet transmission control method and device for a low-power-consumption dual-mode Bluetooth chip, and the method comprises the steps: obtaining a signal strength parameter, a power consumption parameter, a transmission rate parameter and an environment parameter of the dual-mode Bluetooth chip, inputting the parameters into a deep time convolution network, and carrying out the time sequence feature extraction, obtaining a transmission mode switching judgment result; calculating transmission state evaluation data; the chip transmitting power is adjusted in a grading mode, standby power consumption is controlled through a nanoamp LDO circuit, and a dynamic power control parameter is obtained; performing compression coding on the data packet to obtain a dual-mode transmission protocol configuration parameter; executing time sequence sampling, and constructing a dual-mode state feature sequence; the data packet delivery success rate, the end-to-end transmission time delay and the total power consumption of the system are calculated, transmission control parameter optimization is carried out through double-layer deep reinforcement learning, target transmission control parameters are obtained, and the optimal balance of the transmission performance and the power consumption of the dual-mode Bluetooth chip is achieved.

The application discloses a receiver direct current offset calibration method, equipment, a storage medium and a program product, relates to the field of radio frequency communication technology, and discloses a method, which comprises the following steps: detecting a direct current component in a signal received by a receiver through an analog-to-digital converter; determining a calibration mode according to a calibration method defined by a user; if the calibration mode is offline calibration, calculating a current compensation coefficient through a foreground calibration mode by using an adaptive algorithm, and if the calibration mode is online calibration, using a background calibration mode; obtaining a compensation signal after compensation of a direct current offset through a direct current offset signal and the current compensation coefficient; updating the compensation coefficient of a next clock cycle through an adaptive algorithm iteration coefficient and the compensation signal; determining a final compensation coefficient according to the iteration compensation coefficient of an internal counter of the adaptive algorithm, and outputting a calibration signal after calibration of the direct current offset. The application effectively reduces the system complexity through a compensation module and an adaptive algorithm to calibrate the direct current offset of the receiver and reduces the calibration time.

The invention relates to the field of access control, in particular to an access control method and system based on the ultrahigh frequency RFID technology, and the method comprises the following steps: S1, setting a multi-antenna array through distributed layout according to the size, shape and personnel flow condition of an access control area; s2, according to a Hyperledger Fabric block chain platform, nodes are deployed at different positions through a distributed node architecture; s3, the artificial intelligence model is trained by collecting data in the access control system, the trained artificial intelligence model analyzes and detects the data in the access control system in real time, and abnormal behaviors and events are recognized; and S4, displaying each data in the access control system on a management platform in a visual mode, and providing data analysis and optimization management according to an authority management mechanism. The safety of the access control system can be improved, the reliability of the access control system is improved, the intelligent level of the access control system is enhanced, and the management efficiency of the access control system is improved.

The invention discloses a low-profile directional circularly-polarized UWB array antenna which comprises a substrate, a square patch, a power divider and a short circuit column. The substrate comprises a substrate top layer, a substrate middle layer and a substrate bottom layer, a grounding surface structure is arranged at the bottom of the substrate bottom layer, the square patch is arranged on the substrate top layer, and the power divider is arranged on the substrate middle layer and corresponds to the square patch. The two ends of the power divider are connected with the square patches through short circuit columns. By adopting the stacked structure of'square patch-power divider-ground ', the energy coupling can be reduced, and the system isolation can be improved.

The application discloses a multi-mode full-frequency compatible 5G wireless router wireless transceiving control method and belongs to the technical field of router control, and specifically comprises the following steps: acquiring the working frequency band and local oscillator frequency of each radio transceiver module; calculating the frequency band overlapping length and frequency ratio of any two modules; marking the modules with the overlapping length greater than zero as a same-frequency interference module group and marking the modules with the same frequency ratio as a preset ratio as a local oscillator leakage module group; extracting the modules belonging to both groups, taking the local oscillator frequency of the modules as an index to find a frequency mapping table to obtain a clock division coefficient; adjusting the local oscillator frequency of the extracted modules according to the clock division coefficient; repeating the above steps until there is no module belonging to both groups, and outputting the final local oscillator frequency. The application realizes unified identification and iterative suppression of the composite interference of the same-frequency interference and the local oscillator leakage.

The application discloses an eye diagram data synchronization circuit and method and a serial-parallel converter receiving end, and belongs to the technical field of high-speed serial data communication; the circuit comprises: a calibration signal generation module for generating a phase calibration signal according to a phase difference between a data sampling signal and an offset sampling signal; two registers for respectively outputting the offset sampling signal and pre / post offset sampling signals; wherein the pre / post offset sampling signals are obtained by outputting the offset sampling signal in advance / delaying half a bit period; and a selection output module for selecting the offset sampling signal or the pre / post offset sampling signals as a synchronized offset sampling signal output according to the phase calibration signal, so that the synchronized offset sampling signal and the data sampling signal are in the same bit period. The application has wide application range, high synchronization precision and good dynamic performance.

This application relates to the field of radio frequency (RF) technology, and more particularly to an RF receiving circuit and an RF front-end module. In the RF receiving circuit and RF front-end module provided in the embodiments of this application, a switching unit includes a first port, a second port, and a first switch connected between the first port and the second port. The first port is used to output RF signals of a first frequency band and / or RF signals of a second frequency band, and the second port is connected to a suppression unit. The first switch is configured to, when the switching unit outputs RF signals of the first frequency band, control the first switch to a first state to access the suppression unit. The suppression unit is used to suppress RF signals of a target frequency band. Through the above method, when receiving RF signals of the first frequency band, accessing the suppression unit to suppress RF signals of the target frequency band reduces interference from RF signals of the target frequency band to RF signals of the first frequency band, thereby improving the reception quality of RF signals of the first frequency band.

The present invention discloses a method for dynamically adjusting a multimedia broadcast / multicast service (MBMS) transmission area. A network entity groups multiple user equipment (UE) into multiple UE groups. Each UE group is associated with one of multiple MBMS sub-areas, and the multiple MBMS sub-areas belong to one MBMS area. The network entity generates an MBMS transmission configuration for the sub-area and transmits the configuration for the multiple sub-areas to the multiple UEs. The multiple UEs receive and decode MBMS services / data according to the configuration for the sub-areas.

The invention discloses an audio signal processing method and device based on a machine learning algorithm catboost, and belongs to the technical field of audio signal processing and computers. The method comprises the following steps: acquiring real-time audio signals of a sound source by adopting a spatial directional receiving array, preprocessing the acquired real-time audio signals by adopting a signal preprocessing system, and taking preprocessed data as input data of a machine learning algorithm CatBoost. According to the invention, the signal receivers are arranged in the spatial directional receiving array, and the signal fading and interference are reduced due to the improved arrangement mode of the spatial directional receiving array, so that the signal receiving quality is improved. Meanwhile, according to the technical scheme, the characteristic that a machine learning algorithm CatBoost is good at processing category features is fully utilized, the machine learning algorithm CatBoost is applied to the field of audio signal processing, and the beneficial effects that missing values and abnormal values of data can be well processed while category information is kept are obtained.

The invention provides a circularly polarized antenna and Internet of Things equipment. The circularly polarized antenna comprises an antenna radiator, a feed wire, a first fixing structure and a second fixing structure. According to the circularly polarized antenna disclosed by the invention, the circularly polarized wave can be effectively generated through the frame body, the first branch knot and the second branch knot in the antenna radiator, so that the problem of polarization mismatch is reduced, and the signal receiving quality and the system communication efficiency are improved. The feed wire and the antenna radiator are matched with a proper projection coincidence area, and an air coupling feed mode is adopted to transmit energy to the antenna radiator, so that efficient signal transmission and excellent circular polarization characteristics of the circularly polarized antenna are realized. In addition, circularly polarized waves are realized through the structural design of the antenna radiator and the feed wire, so that the circularly polarized antenna is small in size, high in gain and easy to conform.

This invention belongs to the field of ultrasonic sensing and microelectromechanical systems (MEMS) packaging technology, specifically relating to a multi-segment acoustic packaging structure and optimization method for a PMUT ultrasonic transducer. The multi-segment acoustic packaging structure for a PMUT ultrasonic transducer includes a base, a PMUT chip, and an acoustic cavity. The acoustic cavity includes a front cavity section, a tapered transition section, a conduit section, and a waterproof and acoustically permeable membrane. A first minimum gap is formed between the radiating surface of the PMUT chip and the bottom surface of the front cavity section; a second minimum gap is formed between the waterproof and acoustically permeable membrane and the outlet end of the conduit section. Furthermore, the acoustic cavity serves as either a transmitter or a receiver. When used as a transmitter, the depth of the front cavity section is greater than that of the front cavity section when used as a receiver, and the inner diameter of the conduit section is smaller than that of the conduit section when used as a receiver. This packaging structure, through optimization of geometric parameters and acoustic characteristics, achieves differentiated performance improvements for the transmitter and receiver, increasing the transmitted sound pressure and directivity, and expanding the bandwidth and receiving angle of the receiver.

The present invention discloses a parallel high-speed modulation and demodulation microwave transmission system based on LDPC coding, which relates to the field of communication technology, including a signal transmission platform, wherein the signal transmission platform is communicatively connected with a signal source module, an LDPC coding module, a parallel processing module, a diversity antenna module, a channel estimation and equalization module, a demodulation and decoding module, a signal processing module and a performance monitoring module, wherein the modules are connected with electrical signals; the signal source module is used to generate a high-speed data stream for transmission; the LDPC coding module is used to perform LDPC coding processing on the original data signal generated by the signal source module. The present invention improves the reliability of data transmission by introducing LDPC coding, so that a low bit error rate can be maintained under poor channel conditions or interference, and the application of parallel processing technology enables multiple sub-streams to be processed and transmitted independently, thereby reducing the impact of single path fading on the overall transmission quality.

The utility model belongs to the field of communication equipment, and particularly relates to communication equipment of a special vehicle, which comprises a communication equipment body. The bottom of the communication equipment body is fixedly connected with a supporting plate; the bottom of the supporting plate is fixedly connected with a groove column. A gear is rotated to drive a groove column to ascend and descend, so that the position height of the communication equipment body is changed, and when a special vehicle is located in a jungle with dense or surrounding shelters, the situation that the communication equipment body is prone to being affected by the special vehicle, and consequently signals are attenuated and interfered in the transmission process is avoided. At the moment, the distance between the communication equipment body and a signal source can be increased by lifting the communication equipment body, so that the signal receiving quality and stability are improved; and through cooperation of a transverse shaft and a hollow sleeve, the effect of preventing the groove column from transversely moving left and right in the sliding process can be achieved, and therefore the stability of the groove column in the sliding process is improved.

The present disclosure relates to a transmission method, a transmission device, a receiving method and a receiving device. The transmission method generates a plurality of first modulation signals (s1(i)) and a plurality of second modulation signals (s2(i)) according to transmission data; the plurality of first modulation signals (s1(i)) are signals generated using a 16QAM modulation method; the plurality of second modulation signals (s2(i)) are signals generated using a 64QAM modulation of a uniform constellation; a plurality of first signal processed signals (z1(i)) and a plurality of second signal processed signals (z2(i)) satisfying a prescribed formula are generated according to the plurality of first modulation signals (s1(i)) and the plurality of second modulation signals (s2(i)); when the 64QAM modulation used for generating the plurality of second modulation signals (s2(i)) is switched from a 64QAM modulation of a uniform constellation to a 64QAM modulation of a non-uniform constellation, the prescribed formula is changed.

The invention discloses a multi-node sub-frequency point multiplexing method, which is applied to a local communication node of a radio frequency communication network, belongs to the field of communication, and comprises the following steps: determining the relative speed between adjacent communication nodes in a transmission link of the radio frequency communication network under the condition that a data signal is a local originating signal; wherein the transmission link is used for sending the data signal from the local communication node to a target communication node of the radio frequency communication network; determining the transmitting frequency of the data signal according to the determined relative speed and the carrier frequency of the data signal; and sending the data signal according to the transmitting frequency, so that the spectrum interference value of the data signal received by the target communication node is smaller than a preset spectrum interference error threshold. According to the invention, frequency preprocessing is carried out on the sent signal, so that the problem of spectrum interference caused by relative movement between communication nodes in a multi-node communication process is solved.

The utility model provides a kind of system level package chip of vehicle-mounted GNSS receiver, receiver and car, chip includes outer circle contact, inner circle contact and chip body;First, eleventh, twenty-third, twenty-fifth, twenty-seventh, thirtieth, thirty-second contact in outer circle contact, and fifth, eighteenth to twenty-fourth, twenty-eighth contact in inner circle contact, are all ground terminal;Fifth contact in outer circle contact and twenty-ninth contact in inner circle contact, are all first power supply terminal;Sixth contact and seventh contact are connected in outer circle contact, and seventh contact is second power supply terminal;Thirty-sixth contact and thirty-fifth contact are connected in outer circle contact, and thirty-fifth contact is third power supply terminal;Twenty-sixth, twenty-eighth, twenty-ninth and thirty-first contact in outer circle contact are four radio frequency input ports respectively;Fortieth contact in outer circle contact and first contact in inner circle contact are respectively communication interface for wired communication.

The invention provides a radar-based adaptive polarization filtering method and system, and relates to the technical field of radar signal processing. The method comprises the following steps: acquiring main channel discrete data and auxiliary channel discrete data; processing the main channel discrete data by a preset weight coefficient to obtain main channel polarization data; according to the auxiliary channel discrete data and the main channel polarization data, obtaining a cancellation weight coefficient of the auxiliary channel; and performing polarization cancellation on the main channel polarization data according to the cancellation weight coefficient of the auxiliary channel and the auxiliary channel discrete data to obtain cancelled main channel signal data. According to the method, weighting coefficients of two channels are calculated through orthogonal polarization channel signals, clutter interference of a main channel is suppressed in the mode that clutters in the main channel are offset through an auxiliary channel, and therefore the signal-to-noise ratio is increased, the receiving quality of useful signals is effectively improved, and then the target detection capacity is enhanced. In addition, the method has the advantages of automatically compensating the amplitude-phase unevenness between the channels and being easy in engineering implementation.

The invention provides a sensing system beam indication method and device, and relates to the technical field of radio transmission. The method comprises the following steps: judging an association relationship between a communication receiving beam and a sensing beam and whether a sensing signal is successfully sent, comparing a compensation scheme of the sensing signal, compensating the sensing signal, and sending the sensing signal according to the association relationship between the communication receiving beam and the sensing beam received by user equipment. According to the method and the device, the problems that in a traditional communication and sensing integrated scene, signals of a sensing part cannot definitely indicate how to select the receiving beam to the user equipment, and whether the receiving end beam is aligned with the transmitting end beam or not is judged are solved. According to the method, the problems of poor beam alignment capability and the like in the prior art are solved, the precision of a sensing task, such as accuracy in application of target detection, environment monitoring and the like, can be improved, and energy consumption of the system can be reduced by better beam alignment and signal compensation.

The utility model discloses a panel WiFi three-dimensional antenna, which relates to the technical field of three-dimensional antennas, and comprises a shell, a partition groove arranged in the shell and a PCB mainboard arranged on the surface of the shell, the surface of the PCB mainboard is provided with a radiation area and a notch groove, the radiation area is positioned on one side of the notch groove, the surface of the PCB mainboard is provided with mounting holes, the mounting holes are arranged at equal intervals, and the radiation area is positioned on one side of the notch groove. Bolts are installed on the surface of the shell, the bolts are arranged at equal intervals, the bolts are located in the installation holes, and the shell is connected with the PCB mainboard through the bolts and the installation holes. According to the panel WiFi three-dimensional antenna provided by the utility model, the PCB main board and the shell are connected by adopting a bolt mode, and the two sides of the PCB main board are arranged on the cambered surfaces, so that the contact between the PCB main board and the shell can be increased, the good contact between the PCB main board and the shell is ensured, and the interference between the PCB main board and other circuit boards is reduced to the greatest extent, thereby improving the performance of the antenna; and the communication stability of the PCB mainboard is improved.

The invention relates to the technical field of sound pick-up regulation and control, in particular to a low-frequency switching method and system for a moving-coil sound pick-up, and the method comprises the steps: receiving sound wave signals through a target sound pick-up, obtaining an original sound wave signal set, cutting the original sound wave signal set, obtaining a cut sound wave signal set, carrying out the signal analysis of the cut sound wave signal set, and obtaining a sound wave signal set; cutting signal energy and cutting signal frequency are obtained, a cutting signal frequency group and a cutting signal energy group are utilized to carry out environment sound wave interference analysis to obtain a sound wave interference factor, and if the sound wave interference factor is larger than a standard interference factor, a low-frequency filtering device is utilized to carry out low-frequency switching on a target sound pickup to obtain a switched sound pickup. According to the invention, the quality of the sound wave signal received by the moving-coil pickup can be improved, and the environmental adaptability of the moving-coil pickup is enhanced.

The invention provides a double-feed antenna structure. The double-feed antenna structure comprises an antenna body, a first feed point, a second feed point and a grounding assembly, the antenna body comprises a first arm, a second arm and a connecting piece. The first arm is adjacent to the second arm, and the connecting piece is connected with the first arm and the second arm. The first feed-in point is arranged on the first arm. The second feed-in point is arranged on the second arm. The grounding assembly is arranged between the first feed-in point and the second feed-in point, and the distance between the first feed-in point and the grounding assembly is smaller than the distance between the second feed-in point and the grounding assembly.

The embodiment of the invention provides an immersive panoramic video wireless transmission method and device, equipment and a storage medium, and relates to the technical field of display. The method comprises the steps of determining a target transmission video from a plurality of videos to be transmitted according to a transmission demand, obtaining a visual quality evaluation parameter of the target transmission video, and generating a channel constraint condition based on the target transmission video and a channel matching variable, and constructing an optimization target model based on the visual quality evaluation parameters and the channel constraint conditions, and solving to obtain channel allocation data. And selecting a target code rate video from the code rate sub-videos corresponding to each target transmission video according to the channel allocation data, determining a target transmission channel of the target code rate video, and transmitting the corresponding code rate sub-videos based on the target transmission channel. In the channel allocation process, the visual quality evaluation parameters are generated for each target transmission video to participate in the optimization process, the uniform allocation process is carried out, the content association between the target transmission videos is fully considered, and the receiving quality of the panoramic video is improved.

An audio signal processing method and device based on a machine learning algorithm CatBoost, belonging to the fields of audio signal processing and computer technology. A spatial directional receiving array is used to collect real-time audio signals of a sound source, a signal preprocessing system is used to preprocess the collected real-time audio signals, and the preprocessed data is used as input data of the machine learning algorithm CatBoost. The present invention uses a spatial directional receiving array to arrange signal receivers. Due to the improved arrangement of the spatial directional receiving array, the signal fading and interference are reduced, thereby improving the signal reception quality. At the same time, the technical solution makes full use of the characteristics of the machine learning algorithm CatBoost that it is good at processing category features, and applies the machine learning algorithm CatBoost to the field of audio signal processing, thereby obtaining the beneficial effect of being able to handle missing values ​​and outliers of data well while maintaining category information.