19 results about "DBm" patented technology

The invention discloses a voice decoding method, system and device based on electroencephalogram signals and a medium, and relates to the technical field of electroencephalogram signal processing.The method comprises the steps that reading electroencephalogram signals and voice signals in the reading process of a to-be-tested person and imagination electroencephalogram signals in the imagination reading process of the to-be-tested person are collected; inputting the reading electroencephalogram signals and the voice signals into the DRCL to generate electroencephalogram characteristics containing voice information; training the DBM by using the electroencephalogram characteristics as input and using the voice signals as output, and adjusting the DBM by using imaginary electroencephalogram signals to construct a voice synthesizer; a mapping relation between the imaginary electroencephalogram signals and the voice signals is generated through the voice synthesizer, and decoding from the electroencephalogram signals to the voice signals is completed; according to the method, a deep representation correlation learning method is provided, potential correlation between electroencephalogram and voice signals can be deeply mined through a multi-layer network structure, a complex mode which is difficult to recognize by a traditional model is captured, and the voice decoding process is more accurate.

An external TPMS sensor for heavy-duty trucks comprises a helical antenna and a 1225 cell, and is installed outside a tire of a vehicle; and system power consumption is reduced by increasing the communication rate of the TPMS sensor, and / or decreasing the sampling period, and / or decreasing the number of data frames transmitted every time, and / or decreasing RF output power, and / or disposing an LNA circuit at an input terminal of a corresponding receiver antenna. The requirement of the TPMS sensor for a long service life is met by reducing system power consumption; the helical antenna, the matching network, and the 5 dBm chip for outputting power are used to realize miniaturization of the TPMS sensor; and the 1225 cell is used, which, compared with traditional TPMS sensors, allows the diameter of the TPMS sensor to be reduced by about 8 mm and the weight of the TPMS sensor to be reduced by over ⅓, such that miniaturization of the TPMS sensor is further realized.

Methods, media, and systems are provided for optimizing coverage and power usage in a network deploying an unlicensed band. A first transmission power associated with a primary carrier and a second transmission power associated with a secondary carrier are determined. Location data and channel state information from a user device utilizing the primary carrier and the secondary carrier are received. An interference level may be determined using the channel state information. Based on the location data and the interference level, the second transmission power associated with the secondary carrier is reduced and the first transmission power of the primary carrier is increased. In some aspects, a beamforming technique is applied for downlink transmissions via a 5G New Radio unlicensed band. In some aspects, upon detection of an increase of 3 dBi antenna gain, the second transmission power is reduced by 1 dBm.

Solutions are disclosed that employ selective power class permission to enhance coverage. Examples include: determining, by a wireless network, a status of a first user equipment (UE) indicating at least whether the first UE is roaming or is associated with a heavy user account; determining a signal to interference and noise ratio (SINR) for a cell of the wireless network; determining locations of UEs experiencing call failures within the cell; and based on at least the status of the first UE, the SINR for the cell, and locations of call failures within the cell, restricting the first UE from using a transmit power above a maximum transmit of power class (PC) three (PC3). A PC two (PC2) UE, which is a higher power classification UE than a PC3 UE, typically has 3 decibels milliwatt (dBm) higher transmit power than a PC3 UE.

The application relates to the technical field of integrated circuit design, in particular to an APC adjusting circuit and method; a logarithmic converter is used to replace a transimpedance amplifier TIA, extraction of a monitoring diode MPD current I PD is realized, and logarithmic conversion of I PD is realized; target MPD current existing in linear relation is converted from target optical power AOP dBm , intuitive and convenient debugging is realized, and the problem of large error under small optical power is solved.

The invention provides a communication method and a communication device. The method comprises the following steps: generating a PPDU; the PPDU is sent; wherein the working frequency band of the communication equipment is less than 1GHz, the bandwidth of the PPDU is a first bandwidth, and the difference value between the subcarrier interval in the first bandwidth and 3kHz is less than or equal to a first threshold value. According to the scheme, the subcarrier interval is closer to 3kHz in the PSD requirement of 8dBm / 3kHz (namely the difference value is smaller than or equal to the first threshold value) in the FCC regulation, so that the occupation of bandwidth resources can be reduced, the bandwidth resources can be saved, and the spectrum efficiency can be improved.

The present application provides a communication method and a communication apparatus. The method comprises: generating a PPDU; and sending the PPDU, wherein the working frequency band of a communication device is below 1 GHz, the bandwidth of the PPDU is a first bandwidth, and the difference between a subcarrier spacing in the first bandwidth and 3 kHz is less than or equal to a first threshold. According to the solution, the subcarrier spacing is close to 3 kHz in the PSD requirement of 8 dBm / 3 kHz in the FCC regulations (that is, the difference is less than or equal to the first threshold), occupied bandwidth resources thus can be reduced, thereby saving bandwidth resources, and improving the spectrum efficiency.

A disclosure of this specification provides a UE configured to operate in a wireless system, the UE comprising at least one transceiver; at least one processor; and at least one memory operably connectable to the at least one processor and storing instructions that cause the at least one processor to perform operations, wherein operations comprise: determining a maximum output power, based on MPR; transmitting a PSFCH with intra-band non-contiguous CA, based on the maximum output power, wherein the MPR is based on power class of the UE, dual PA architecture requirement and requirement for the MPR, wherein the dual PA architecture requirement is whether the UE supports dual PA architecture, wherein the requirement for the MPR is whether the MPR meets -13 dBm / MHz or -30 dBm / MHz.

The invention provides a compact radio frequency rectifier adopting a novel frequency and load dual adaptive network. The proposed rectification structure comprises a dual adaptive network (DAN) to improve frequency bandwidth and expand load range, and a single impedance matching stub with an impedance matching effect. The dual adaptive network (DAN) is composed of a double-branch structure, wherein a single branch comprises a Schottky diode and a short-circuit microstrip line. The dual adaptive network (DAN) covers high and low frequency bands by using the frequency selection characteristic, and broadens the load range by using power distribution, thereby realizing the bandwidth broadening at a 3.5 GHz frequency point and the significant expansion of the load impedance. The dual adaptive network (DAN) realizes impedance matching under the action of the impedance matching stub. When the input power is 8 dBm, the power conversion efficiency (the relative bandwidth of 86.42%) of 50% or above is kept within the range of 2.2-5.8 GHz, and the peak value reaches 64.58% at 3.6 GHz. And the efficiency is kept above 50% within the load resistance range of 0.1-2.1 kilomega (the load change rate is 21).

Provided in the present disclosure are a passive frequency conversion circuit, a multiple-input multiple-output signal transmission apparatus, and an antenna. The passive frequency conversion circuit comprises a frequency division circuit, a pass-through circuit and a frequency mixing circuit. The frequency division circuit is electrically connected to both the pass-through circuit and the frequency mixing circuit. The frequency division circuit is configured to receive an input of an external signal and perform frequency division on the external signal to obtain pass-through signals and / or multiple frequency-converted signals. The maximum input power of the frequency division circuit is greater than or equal to 38 dBm. The pass-through circuit is configured to receive the pass-through signals and output same. The pass-through signals comprise signals of at least one frequency band. The frequency mixing circuit is configured to receive the multiple frequency-converted signals, perform frequency mixing on the multiple frequency-converted signals to obtain a frequency-mixed signal, and then output the frequency-mixed signal. The frequency band of the frequency-mixed signal is the same as the frequency band of at least some signals among the pass-through signals. The present disclosure is conducive to reducing the construction cost of outdoor coverage of a 5G MIMO network and shorten the construction period.

The invention relates to a photonic system provided with a photonic chip made in silicon technology, said photonic chip (10) comprising:—a Mach-Zehnder modulator (100) the modulation sections (105, 106) of which extend over a length L smaller than 3 mm;—first means (107) for adjusting operating point;—a semiconductor optical amplifier (SOA) configured to amplify a signal modulated by the Mach-Zehnder modulator, the semiconductor optical amplifier (SOA) being such that the amplitude of optical modulation associated with the photonic chip, when the set phase shift F is adjusted to the range 0.6*pi-0.9*pi, is of between −2 dBm and 6 dBm, at an output port S placed downstream of the semiconductor optical amplifier (SOA).

A package includes a first direct bonded metal (DBM) substrate, a first semiconductor die disposed on a top surface of the first DBM substrate, a second DBM substrate disposed at a height above the first DBM substrate, and a second semiconductor die disposed on a top surface of the second DBM substrate. A wire bond is made between the first semiconductor die disposed on the top surface of the first DBM substrate and the second semiconductor die disposed on the top surface of the second DBM substrate.

The invention relates to the technical field of Internet of Things warehousing automation, and particularly discloses an RFID warehousing logistics label reading method and system. The method comprises the following steps: directionally activating a classification label deployed at the 1.5-2m height of a warehouse partition entrance through a 5-10-degree narrow-beam 18-25dBm radio frequency signal, and analyzing goods large-class data by adopting a bit-by-bit extension protocol comprising an initial discrimination code with a binary numerical value of 11; goods shelf coordinate data are obtained based on a dynamic time slot allocation algorithm that capacity expansion is carried out if the conflict time slot proportion exceeds 50% and capacity shrinkage is carried out if no conflict is carried out for five consecutive rounds through a first-level label of which the width is 1.5-3 m of a goods shelf laminate covered by a 60-90-degree wide-beam 26-30 dBm radio frequency signal; and scanning a second-level label at the height of 0.5-1.5 m of the cargo unit through a 20-30-degree medium wave beam 23-25 dBm radio frequency signal, and alternately calling a dynamic time slot and a bit-by-bit extension protocol according to an energy sudden change threshold value from-50 dBm to-45 dBm to read cargo batch data.

The application discloses a pressure sensing label and antenna integrated structure for insoles and an implementation method thereof, and relates to the fields of radio frequency identification and wearable sensing technology.The structure comprises a flexible inverted F (PIFA) antenna and a ground back with a plane size of not more than about 50*50 mm, a low dielectric foam isolation layer with a thickness of 2-5 mm, a rigid-flex electronic island, a Pi type matching network, a thin film FSR voltage division network and a protection structure.The application solves the problems of large antenna frequency shift and low efficiency under near human body loading through the collaborative design of the PIFA antenna, the foam isolation and the high coverage ground back;the reliability under long-term stepping and sweat environment is improved by adopting the rigid-flex electronic island to isolate the sensitive device, cooperating with stress release and three-proof design;the passive scheme can realize 50-100 Hz level plantar pressure sampling and stable read-back under the conditions of a reader EIRP of 10-20 dBm and a distance of less than 15 cm, and is suitable for gait monitoring, powered exoskeleton control and other scenes.

The application discloses a multi-octave power amplifier design method based on Bayesian optimization, constructs a new acquisition function, and uses a Bayesian optimization algorithm to design a multi-octave power amplifier. Through data training, model fitting, prediction point classification, and sampling processes, a set of optimal parameters are obtained as power amplifier coefficients. The application of the method enables the PA to obtain considerable performance in a relatively short optimization time. In the range of 0.6-2.8 GHz, the output power of the power amplifier is greater than 40.3 dBm, the PAE is greater than 62%, and the gain is greater than 10.3 dB. The acquisition function CG-GPUCB is applied to the optimization of the PA circuit for the first time as an acquisition function of the Bayesian optimization algorithm, and the long optimization time is overcome. In a relatively short optimization time, the designed PA has a wider bandwidth under the conditions that the output power, power additional efficiency, gain and the like meet the index requirements.

The invention provides a novel broadband rectifier which integrates double transmission lines (DTL) and is applied to the field of wireless power transmission. The framework of the rectifier adopts a transmission line, the transmission line is bent into an L shape, and the transmission line and the DTL form an impedance matching network together. The DTL has the effect of counteracting the imaginary part of the diode, the rectification bandwidth is effectively widened, and the transmission line is used for impedance matching. Through experimental manufacturing and testing of the rectifier, the result shows that the conversion efficiency of the rectifier in the frequency range of 1.5-2.5 GHz exceeds 60% and the peak efficiency reaches 75.6% under the conditions that the input power is 8 dBm and the load is 1 kohm.

The present application provides a communication method and a communication apparatus. The method comprises: generating a PPDU; and sending the PPDU, wherein the working frequency band of a communication device is below 1 GHz, the bandwidth of the PPDU is a first bandwidth, and the difference between a subcarrier spacing in the first bandwidth and 3 kHz is less than or equal to a first threshold. According to the solution, the subcarrier spacing is close to 3 kHz in the PSD requirement of 8 dBm / 3 kHz in the FCC regulations (that is, the difference is less than or equal to the first threshold), occupied bandwidth resources thus can be reduced, thereby saving bandwidth resources, and improving the spectrum efficiency.

A periodic optical output diagnostic device for an optical transceiver comprising, in order, a driving circuit according to the present invention, an optical transmitter including a laser diode or LED, a first optical connector, an optical cable, a second optical connector, and an optical receiver, comprises: a first voltage measuring unit connected to the driving circuit of the optical transmitter to measure a voltage drop generated by a current signal input to the optical transmitter; the first optical output measuring unit connected to the rear end of the optical transmitter to verify the output of the optical transmitter; a second optical output measuring unit for measuring the output level of an optical link including the optical transceiver to calculate optical loss in the optical link; and the second voltage measuring unit for measuring the output voltage of a circuit in which an optical signal is demodulated into a current signal in the optical receiver. The apparatus is characterized by comprising: an optical attenuator for adjusting the optical attenuation rate of the optical cable based on the output voltage measured by the second voltage measuring unit; and an optical output diagnostic control unit connected to each of the first voltage measuring unit, the first optical output measuring unit, the second optical output measuring unit, the optical attenuator, and the second voltage measuring unit, and calculating one or more of the values ​​of an optical transmitter output (dBm), a total link loss (dBm), a final reception sensitivity (dBm), or an optical output margin (dBm) based on data from the first voltage measuring unit, the first optical output measuring unit, the second optical output measuring unit, the optical attenuator, and the second voltage measuring unit.

A disclosure of this specification provides a UE configured to operate in a wireless system, the UE comprising at least one transceiver; at least one processor; and at least one memory operably connectable to the at least one processor and storing instructions that cause the at least one processor to perform operations, wherein operations comprise: determining a maximum output power, based on MPR; transmitting a S-SSB with intra-band non-contiguous CA, based on the maximum output power, wherein the MPR is based on power class of the UE, dual PA architecture requirement and requirement for the MPR, wherein the dual PA architecture requirement is whether the UE supports dual PA architecture, wherein the requirement for the MPR is whether the MPR meets -13 dBm / MHz or -30 dBm / MHz.