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122results about How to "Does not increase power consumption" patented technology

Precompensation method for in-band group delay fluctuation of satellite navigation signal generating system

The invention relates to a precompensation method for in-band group delay fluctuation of a satellite navigation signal generating system, which comprises the following steps: (1) measuring a combined S parameter of a modulator, a filter and an amplifier in the satellite navigation signal generating system, and determining amplitude-frequency and group delay characteristic of the combination of the three devices; (2) counting the group delay characteristic of a precompensation filter according to the combined group delay characteristic; (3) obtaining the phase-frequency characteristic of the precompensation filter; (4) setting the phase-frequency characteristic of the precompensation filter to be an inverse Sinc function; (5) obtaining a system function of the precompensation filter according to the amplitude-frequency characteristic and phase-frequency characteristic of the precompensation filter; (6) obtaining a unit impulse response function of the precompensation filter; (7) setting a threshold value, and setting the quantity in the unit impulse response function, which is smaller than the threshold value, to be zero to be as a coefficient of the precompensation filter; and (8) realizing the precompensaiton filter in a digital standalone of the satellite navigation signal generating system by using the coefficient of the precompensation filter, so as to compensate the group delay fluctuation of the satellite navigation signal generating system.
Owner:XIAN INSTITUE OF SPACE RADIO TECH

Direct-current input end inverted connection protecting circuit, direct-current input end inverted connection protecting method and direct-current input equipment

The invention provides a direct-current input end inverted connection protecting circuit. The direct-current input end inverted connection protecting circuit comprises a controllable disconnection accessory, a voltage detecting unit and a control unit, wherein the controllable disconnection accessory is connected between a direct-current input end and a rear-stage circuit; the voltage detecting unit is connected between a positive pole and a negative pole of the direct-current input end in parallel, and is used for detecting voltage signals between the positive pole and the negative pole of the direct-current input end and transmitting a detection result to the control unit; and the control unit is respectively connected with the voltage detecting unit and the controllable disconnection accessory, is used for judging whether the positive pole and the negative pole of the direct-current input end are in inverted connection or not according to the detection result of the voltage detecting unit, controls the controllable disconnection accessory to perform disconnection if the positive pole and the negative pole of the direct-current input end are in inverted connection, and controls the controllable disconnection accessory to perform connection if the positive pole and the negative pole of the direct-current input end are connected with each other correctly. Correspondingly, the invention provides direct-current input equipment and a direct-current input end inverted connection protecting method. Compared with the prior art, the direct-current input end inverted connection protecting circuit has the advantages that the cost can be reduced, and the power consumption of a system can also be reduced.
Owner:TBEA SUNOASIS +1

Energy-saving air conditioning unit having automatic heat recovery controlling function and control method thereof

The invention discloses an energy-saving air conditioning unit having an automatic heat recovery controlling function. The energy-saving air conditioning unit solves the problems that existing constant-temperature constant-humidity air conditioning units are high in usage cost and wasteful in energy after being used. The air conditioning unit comprises a refrigerating unit, the refrigerating unit is composed of a compressor, a condenser, a liquid storage pot, a drying and filtering device, an expansion valve and an evaporator which are connected through conveying pipelines sequentially, the evaporator is in back connection with the compressor, and simultaneously, the air conditioning unit is provided with a reheating unit which is in parallel connection with the pipeline between the compressor and the condenser. The air conditioning unit is simple in structure and convenient to use, the power of electrical heating is cancelled due to the application of the technology, the heat which is to be dissipated outdoors is directly led into a room, the requirements of the room for the temperature and the humidity are met, the electrical load is reduced, and energy conservation is achieved, so that the air conditioning unit has high practical values and promoting values.
Owner:YIMIKANG TECH GRP CO LTD

Method for discovering small stations based on graph coloring in ultra-dense wireless network

The invention discloses a method for discovering small stations based on graph coloring in an ultra-dense wireless network. The method comprises the steps that the number of small station groups, namely the available color number Ncolors, is determined by an operator; a multiplex distance dreuse which is as big as possible is found under the premise that the used color number is not larger than the Ncolors; an interference relation graph is established according to the dreuse, and a Brelaz algorithm is used for coloring; the small stations are grouped according to coloring results, and all groups of small stations are made to send synchronous signals in turn; when network topology changes, the interference relation graph is reestablished, coloring is conducted again, the small stations are regrouped, and the small stations are made to send synchronous signals in turn according to the new groups. According to the method, the small stations are grouped, the interference of the synchronous signals of different small stations is reduced; the interference relations between the small stations are reflected through the interference relation graph, so that the small stations which interfere with each other seriously are prevented from being distributed in the same group, and the interference between the small stations is further reduced; the probability that UE discovers weak small stations is improved, and the number of the small stations discovered by the UE is increased.
Owner:SOUTHEAST UNIV

Node awakening method of wireless communication system, wireless communication system and equipment

The invention relates to a node awakening method of a wireless communication system, the wireless communication system and equipment. The method comprises the following steps: receiving a wake-up codecombination packet sent by a master node when a slave node is in a wake-up detection state, wherein the wake-up code combination packet is sent in a preset time period when the master node has a communication demand, and consists of a plurality of basic units, wherein each basic unit consists of a lead code and an address code, the lead code is composed of two same spread spectrum symbols of linear frequency modulation, and the address code adopts one spread spectrum sequence in a pseudo-random spread spectrum sequence code group; enabling the slave node to detect spread spectrum symbols of linear frequency modulation in the wake-up code combination packet; continuing to detect the spread spectrum sequence of the address code when the slave node detects that the spread spectrum symbol oflinear frequency modulation is successfully detected; and enabling the slave node to enter a formal wake-up state from a wake-up detection state when the slave node detects that the spread spectrum sequence of the address code is successfully detected, and receiving data sent by the master node. The method can save power consumption.
Owner:深圳市华智芯联科技有限公司

Method for calculating electric quantity of lithium-manganese disposable battery in super-long standby tracker and tracker

The invention discloses a method for calculating the electric quantity of a lithium-manganese disposable battery in a super-long standby tracker and the tracker. The method comprises the steps of s1,GSM assigning an initial value to electric quantity of a first battery or a second battery if a single-chip microcomputer shows a power-on reset mark, and the acquired voltage of a battery is larger than a first preset voltage value; s2, calculating the power consumption percentage of the battery after the initial value of the electric quantity is assigned to the first battery; s3, assigning the remaining electric quantity of the battery; s4, calibrating the remaining electric quantity of the battery if the recollected voltage of the battery is smaller than the first preset voltage value, andotherwise, assigning the remaining electric quantity of the battery again; s5, determining whether the replacement battery criterion is met or not, and if so, returning to the s1, and if not, the stepcorresponding to assigning the remaining electric quantity of the battery; calibrating the remaining electric quantity of the battery after the initial value of the electric quantity of the second battery is assigned, and then determining whether a new battery is replaced or not. The tracker does not need to add a new device, so that the electric quantity calculation can be realized, and the calculation precision is high. The intelligent learning can be carried out according to historical data statistics stored in the GSM.
Owner:SHENZHEN JIMI SOFTWARE CO LTD

Method and device for tracking service life of electronic and electrical products

The invention discloses a method and device for tracking the service life of electronic and electrical products. In the device, a RFID (Radio Frequency Identification Device) microchip provided with an antenna coil is connected on a working power supply of an electrical product; the RFID microchip is used for recording and calculating the start times and accumulated working time of the working power supply of the electrical product and storing the start times and accumulated working time in a self-carried EEPROM (Electrically Erasable Programmable Read-Only Memory); read-write equipment matched with the RFID microchip approaches the antenna coil, and writes or reads data in the EEPROM through an RF (Radio Frequency) air interface; therefore, the tracking and the acquisition of data information of the service life of the electrical product are realized by adopting RFID means without changing the hardware structure of a circuit of the electrical product; moreover, the device has the advantages of extremely low power consumption, tiny volume, low investment, convenience for installation and simplicity and quickness for operation; the power consumption of the electrical product cannot be increased; the device can be arranged and adhered to the insides of plastic shells of various electrical products; the test result can be obtained as the test is carried out, so that the result is clear; and convenience is provided for the service-life tracking statistics and after-sale maintenance services of the electrical product.
Owner:TATWAH SMARTECH CO LTD

Doherty power amplifier based on dynamic power distribution

The invention provides a Doherty power amplifier based on dynamic power distribution. The Doherty power amplifier comprises a dynamic power distributor, two common-source amplifiers and a power combiner which are connected in sequence, the two common-source amplifiers comprise two two-stage differential common-source amplifiers, eight neutralizing capacitors and two inter-stage matching transformers, the neutralizing capacitors are arranged at the differential input and output ends of the amplifiers in a crossed mode, and the inter-stage matching transformers are arranged between the first stage and the second stage of the main path amplifier and between the first stage and the second stage of the auxiliary path amplifier respectively; the dynamic power divider comprises three inductance coils and four capacitors, and the power combiner comprises three inductance coils. According to the dynamic power divider, through a load modulation effect, the power distribution ratio of a signal toa main circuit amplifier and an auxiliary circuit amplifier is changed when an input signal changes, so that the overall linearity of a circuit is improved; a three-coil coupled power combiner is used for replacing a traditional quarter-wavelength line structure, and the overall bandwidth of the circuit can be guaranteed while the load traction effect is generated.
Owner:TSINGHUA UNIV

Micro-grain light emitting diode display panel

The invention provides a micro-grain light emitting diode display panel, wherein the display panel comprises a flexible substrate, a plurality of light emitting diodes which are distributed in an array form, a diffraction grating and a light scattering film which are arranged at the upper sides of the plurality of light emitting diodes, and a plurality of light valves which are arranged at the upper side of the light scattering film, wherein the flexible substrate comprises a drive circuit, and the plurality of light emitting diodes are fixed to the flexible substrate; the drive circuit is connected to the plurality of light emitting diodes and is used for driving the light emitting diodes to emit white light; the diffraction grating is used for splitting the white light which is emitted by the light emitting diodes, so that various emergent lights which are different in wavelength can be formed; the light scattering film is used for gathering the emergent lights which are same in wavelength and for scattering the emergent lights which are different in wavelength, so that primary light in at least one color is formed; and the plurality of light valves are used for regulating intensity of the primary light. The display panel provided by the invention can become lighter and thinner and can guarantee flexibility, without increase in power consumption of the display panel.
Owner:WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

Millimeter wave frequency multiplier circuit based on relationship between active millimeter wave frequency multiplier base bias voltage and fundamental wave input signal power amplitude

ActiveCN110401420AImprove harmonic output signal powerImprove conversion gainOscillations generatorsMicrocontrollerTransformer
The invention discloses a millimeter wave frequency multiplier circuit based on a relationship between active millimeter wave frequency multiplier base bias voltage and fundamental wave input signal power amplitude. A fundamental wave signal input end is connected with a radio frequency coupler, a straight-through end of the radio frequency coupler is connected with input matching, and a couplingend is connected with a radio frequency detector. One end of a primary coil of the millimeter-wave transformer is connected with an input matching output end, and the other end is grounded. The outputend of the radio frequency detector is connected with the input end of the single-chip microcomputer control system. The output end of the single-chip microcomputer control system is connected with aradio frequency center virtual ground point of a secondary coil of the millimeter wave transformer. The two ends of the secondary coil are connected with the two base electrode ends of the frequencymultiplication core respectively, the two emitting electrodes of the frequency multiplication core are connected with the output matching input end, and the output matching output end is connected with the harmonic signal output end. The harmonic output signal power of the active millimeter wave frequency multiplier can be improved, the conversion efficiency from direct current to radio frequencysignals can also be improved, and meanwhile, the power consumption of the active millimeter wave frequency multiplier cannot be increased.
Owner:SOUTHEAST UNIV

Node address coding method of wireless communication system, wireless communication system and equipment

The invention relates to a node address coding method of a wireless communication system, the wireless communication system and equipment. The method comprises the following steps: receiving a wake-upcode combination packet sent by a master node when a slave node is in a wake-up detection state, wherein the wake-up code combination packet comprises a first address code combination packet and a second address code combination packet, the first address code combination packet comprises a plurality of first address codes, the first address codes comprise a first lead code and a second lead code,and the second address code combination packet comprises a plurality of second address codes; enabling the slave node to detect the first lead code and the second lead code of a first address code inthe wake-up code combination packet sent by the master node; continuing to detect the spread spectrum sequence of the second address code when the slave node detects that both the first lead and thesecond lead are successfully detected; and enabling the slave node to enter a formal wake-up state from a wake-up detection state when the slave node detects that the spread spectrum sequence of the second address code is successfully detected, and receiving data sent by the master node. The method can save power consumption.
Owner:深圳市华智芯联科技有限公司
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