30results about How to "Reduced reception performance" patented technology

The invention discloses a method and a device and communication equipment of reducing interference of a clock on a radio frequency system. The method is used for reducing the interference of the clock of the communication equipment on the radio frequency system and comprises obtaining center frequency of a signal channel which builds connection with the communication equipment and network, obtaining frequency of a bus clock of the communication equipment, and naming secondary clock frequency, comparing the center frequency and the secondary clock frequency, obtaining a comparing result, when the comparing result is the center frequency and frequency doubling of the secondary clock frequency, controlling bus clock frequency hopping, and enabling the center frequency not to be on the frequency doubling of the secondary clock frequency. By adoption of the technical scheme, interference of a harmonic component of a secondary clock on the radio frequency system can be removed, and the receiving performance of the radio frequency system is prevented from decreasing.

For precluding useless resources of a pseudo wire in a device distributing pseudo wires to lighten the receiving capacity, MPLS (Multi Protocol Label Switching) tunnels are established with an opposing device. From among the established MPLS tunnels, an MPLS tunnel having a remaining resource for a pseudo wire at interfaces having the MPLS tunnels in response to a pseudo wire establishment request is selected and the information of the selected MPLS tunnel associated with a label of the pseudo wire having the remaining resource is distributed to the opposing device. Alternatively after having established the MPLS tunnels with the opposing device, when a distribution request of the pseudo wire information associated with desired MPLS tunnels is received from the opposing device having received the pseudo sire establishment request, a label of the pseudo wire is similarly determined and distributed to the opposing device together with the information of the MPLS tunnel passing the pseudo wire.

An apparatus for hierarchical modulation generates a first hierarchical symbol sequence by mapping a first hierarchical bit sequence corresponding to an information bit sequence into a bit position in a first signal constellation according to a first modulation method. Further, the apparatus for hierarchical modulation generates a second hierarchical symbol sequence by mapping a second hierarchical bit sequence corresponding to an additional information bit sequence into a bit position in a second signal constellation according to a second modulation method and then phase-rotating the second hierarchical bit sequence as much as the phase of each first hierarchical symbol. The apparatus for hierarchical modulation generates a hierarchical modulating symbol sequence by adding up symbols in the generated second hierarchical symbol sequence and symbols in the first hierarchical symbol sequence.

The invention discloses an overheating alarm plug for a hair dryer. The plug comprises a housing; two external connection electric columns are inserted into the outer wall of the housing in a penetrating manner; two internal connection electric columns corresponding to the two external connection electric columns in position are fixed to the inner wall of the housing; a rotation groove is formed in the side wall of the housing and penetrates through the side wall of the housing; a rotating plate is slidably connected to the inner wall of the rotation groove; insulating plates are fixed to thetwo ends of the rotating plate; two sets of symmetrically-arranged elastic pieces are fixed to the side wall of the rotating plate. According to the plug, when the temperature of the position of the plug rises to a certain degree, an air bag expands to be large enough, so that connecting sheets are in contact with power connection sheets, and a lamp tube is electrified and flashes, so that a usercan be warned; since the noise of the hair dryer in a using process is large and the hair dryer is close to the ears of the user, the receiving capacity of the user to external sound is weakened, thesensitivity of the user to light is high, and therefore, the warning effect of the flashing light is better, and the user can respond more quickly.

This invention discloses a set method for gain factors of data channels, which computes gain factor betasfg of the data channel with the spectrum-spread factor not greater than a set value SFg to further compute gain factor betak of the current channel centralizing the data channels and quantizes gain factor betak of the data channels of different spectrum-spread factors. This invention also discloses a set terminal for gain factors of data channels. This invention ensures the proportion relation of gain factors of data channels of different spectrum-spread factors by differentiating spectrum-spread factors to quantize gain factors of data channels to reach the same transmission performance.

The invention discloses an electrified detection system for partial discharge of an electric sleeve. The electrified detection system comprises a directional antenna, a signal conditioner and a signal collector, wherein the directional antenna, the signal conditioner and the signal collector are sequentially connected; the directional antenna is used for detecting an electromagnetic wave signal radiated due to discharge of a to-be-detected position of the electrified sleeve, converting the electromagnetic wave signal into a voltage signal and sending the voltage signal to the signal conditioner; the signal conditioner is used for carrying out noise removing on the voltage signal, amplifying the voltage signal and sending the conditioned signal to the signal collector; the signal collector is used for obtaining a digital signal by carrying out AD (Analog to Digital) conversion on the conditioned signal, and storing and displaying the digital signal. According to the technical scheme disclosed by the invention, the detection sensitivity is increased, and strong interference from severe electromagnetic environment of a transformer substation to partial discharge detection is overcome.

The invention discloses a radio frequency circuit, a radio frequency circuit control method and a device and electronic equipment, and belongs to the technical field of electronic equipment. Wherein the radio frequency circuit comprises a first radio frequency transceiver, a second radio frequency transceiver, a first radio frequency module, a second radio frequency module, a third radio frequency module, a double-pole-double-throw switch, a first antenna, a second antenna and a third antenna, and the isolation degree between the third antenna and the second antenna is larger than that between the first antenna and the second antenna; a first port of the first radio frequency transceiver is connected with a first end of the first radio frequency module, and a second end of the first radio frequency module is connected with the first antenna and the third antenna through the double-pole-double-throw switch; a second port of the second radio frequency transceiver is connected with a first end of the second radio frequency module, and a second end of the second radio frequency module is connected with the first antenna and the third antenna through the double-pole-double-throw switch; and a third port of the second radio frequency transceiver is connected with the second antenna through the third radio frequency module. According to the scheme, the problems of high implementation difficulty and poor performance of a radio frequency circuit scheme for WIFI 5G and N79 are solved.

The invention discloses a method, a multimode terminal and a network side device for reducing multimode mutual interference. The method comprises that if discontinuous interference on a second mode exists when the multimode terminal is in a first mode, the multimode terminal adjusts signal quality indication values of the second mode according to characteristic parameters of the discontinuous interference and the fact that whether the multimode terminal is in an interference gap of the first mode when signal quality of the second mode is measured, and the multimode terminal sends adjusted signal quality indication values to a network side. According to the method, the multimode terminal and the network side device, the multimode terminal adjusts reported signal-to-noise ratio (SNR) values on a terminal side according to characteristics of the discontinuous interference or calculates SNR values on the network side, so that reduction of receiving performance of the terminal under the influence of the discontinuous interference is avoided.

The present disclosure provides a method and device in a node for wireless communications. A first receiver receives a first signal and a second signal; a first transmitter transmits a third signal in a first radio resource pool; wherein the first signal is used for determining first information, the first information being related to channel quality between the first node and a transmitter of the first signal; the second signal is used for determining second information, the second information being related to channel quality between a transmitter of the second signal and the first node; the transmitter of the first signal is different from the transmitter of the second signal; and the first information and the second information are used together for determining a magnitude of time-domain resources occupied by the third signal.

The invention discloses a robust secure transmission method and system in a time delay sensitive heterogeneous network. The method comprises the steps that a non-central processing base station acquires information state information of a service user of the base station and service users of other base stations in the network and corresponding channel state error information; the central processingbase station establishes a joint design model, wherein the joint design model meets the reliability and security constraints of a time delay sensitive heterogeneous network, distinguishes the downlink information beam and the AN vector, and issues the downlink information beam and the AN vector to the corresponding non-central processing base station through the inter-base station link; and the non-central processing base station transmits downlink information to the service user of the non-central processing base station according to the received downlink information beam and AN vector. According to the invention, the receiving performance of legal users is improved, and the downlink communication reliability and security of the heterogeneous network are ensured; and the influence causedby the CSIs error is considered, so that the method has good robustness.

A blood pressure measurement device is mounted with a radio-controlled clock function in a main body without lowering reception performance of the standard radio wave of the radio-controlled clock. A substrate including a sensor mounting surface and a sensor non-mounting surface is mounted with a pressure sensor. An antenna for receiving the standard radio wave including time information of the radio-controlled clock is mounted. The antenna includes a bar-shaped magnetic body core and a coil wound around the magnetic body core. A pump is arranged such that an axis line direction of the motor and an extending direction of the magnetic body core are substantially orthogonal. The substrate and the substrate are arranged so that the sensor non-mounting surface of the substrate and the antenna mounting surface of the sensor face each other.

Methods and apparatuses are presented for conducting communications over a shared communication medium involving (a) sending a request from a first node, the shared communication medium organized to include (i) a request signal space including a plurality of request segments each having a different location within the request signal space and (ii) a scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the request sent in a request segment, (b) obtaining an assignment associating the request with a scheduled transmission segment, the assignment taking into account location of the request, (c) from the first node, sending a data transmission in the scheduled transmission segment associated with the request, and (d); wherein the assignment is made remotely at a second node in response to the request as received at the second node, and a corresponding assignment message is communicated to the first node.

Methods and apparatuses are presented for conducting communications over a shared communication medium involving (a) sending a request from a first node, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the request sentin a request segment, (b) obtaining an assignment associating the request with a scheduled transmission segment, and (c) from the first node, sending a data transmission in the scheduled transmissionsegment associated with the request in accordance with the request, and (d); wherein a collection of request segments in the plurality of request segments is separated by a guard zone from an adjacent collection of scheduled transmission segments in the plurality of scheduled transmission segments.

One or more embodiments of the invention provide a secure communication method, system and device for a robust physical layer, and a storage medium. The method comprises the following steps: acquiring communication data; establishing a constraint model according to the communication data; determining a constraint problem based on a time delay tolerant system; the constraint problem is optimized using the constraint model to perform secure communications. According to the method, the downlink signal beams and the AN vectors of the macro base station and the micro base station are designed through joint optimization, so that interference in the network is more deflected to a receiving end of an eavesdropper, the receiving performance of the eavesdropper is reduced, and compared with a traditional physical layer security scheme, the robustness and stability of network security are remarkably improved.

Methods and apparatuses are presented for conducting communications over a shared communication medium involving (a) sending a request from a first node, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the request sent in a request segment, (b) obtaining an assignment associating the request with a scheduled transmission segment, and (c) from the first node, sending a data transmission in the scheduled transmission segment associated with the request in accordance with the assignment.

There are provided: a main receiving unit for receiving incoming signals from a base station via a main antenna provided in a portable terminal; sub receiving units for receiving incoming signals from the base station via a plurality of detection antennas provided in the portable terminal; a detection unit for detecting the arriving direction of base station signals in the radio wave environment of the portable terminal based on receiving level information of the main antenna, on receiving level information of the detection antennas and on directivity information of the detection antennas; and notifying units for notifying information about the arriving direction of the base station signals detected by the detection unit.

A television tuner capable of receiving digital television signals and analog television signals comprises: a mixer circuit that converts the received television signals into signals of an intermediate-frequency band, and an intermediate-frequency tuning circuit being connected to a rear end of the mixer circuit and set to a tuning frequency corresponding to a reception channel, wherein the intermediate-frequency tuning circuit includes: a first resonant circuit configured to have a first capacitance and to have a resonant frequency set in the intermediate-frequency band, and a second resonant circuit configured to have a second capacitance and to have a resonant frequency set substantially equal to that of the first resonant circuit, and wherein the first capacitance is smaller than the second capacitance.

An apparatus for hierarchical modulation generates a first hierarchical symbol sequence by mapping a first hierarchical bit sequence corresponding to an information bit sequence into a bit position in a first signal constellation according to a first modulation method. Further, the apparatus for hierarchical modulation generates a second hierarchical symbol sequence by mapping a second hierarchical bit sequence corresponding to an additional information bit sequence into a bit position in a second signal constellation according to a second modulation method and then phase-rotating the second hierarchical bit sequence as much as the phase of each first hierarchical symbol. The apparatus for hierarchical modulation generates a hierarchical modulating symbol sequence by adding up symbols in the generated second hierarchical symbol sequence and symbols in the first hierarchical symbol sequence.

An optoelectronic device includes a photodetection means arranged for converting first and second complementary optical signals into first and second complementary currents, and a processing means arranged for processing these first and second complementary currents to output at least a first output voltage. This processing means includes i) a conversion means arranged for separately converting the first and second complementary currents into first and second operating voltages, ii) a balancing means arranged for balancing phase and amplitude of the first and second operating voltages, and iii) a differential amplification means arranged for applying a subtraction function to the first and second operating voltages with balanced phase and amplitude to produce at least the first output voltage, which is proportional to the difference between the first and second operating voltages with balanced phase and amplitude.

The invention discloses a method, a multimode terminal and a network side device for reducing multimode mutual interference. The method comprises that if discontinuous interference on a second mode exists when the multimode terminal is in a first mode, the multimode terminal adjusts signal quality indication values of the second mode according to characteristic parameters of the discontinuous interference and the fact that whether the multimode terminal is in an interference gap of the first mode when signal quality of the second mode is measured, and the multimode terminal sends adjusted signal quality indication values to a network side. According to the method, the multimode terminal and the network side device, the multimode terminal adjusts reported signal-to-noise ratio (SNR) values on a terminal side according to characteristics of the discontinuous interference or calculates SNR values on the network side, so that reduction of receiving performance of the terminal under the influence of the discontinuous interference is avoided.

The invention provides an untrusted relay full duplex transmission method and system combined with sink zero-forcing scrambling. An information source A sends a secret signal x to a full duplex relayR, and an information sink B sends an artificial noise interference signal v to the full duplex relay R at the same time; the full duplex relay R receives the yR and forwards the signal xR = beta yR to the information sink B by adopting an amplifying and forwarding protocol, and beta is an amplifying and forwarding factor; and the information sink B adopts a maximum ratio receiving strategy to design a receiving vector r = gB, wherein a received signal is yB = rH (gBxR + nB), nB is an NBr*1-dimensional additive white Gaussian noise vector of the information sink B, and NBr is the number of receiving antennas. According to the invention, the transmission efficiency is improved, and the receiving effect of an eavesdropping node on the secret signal is effectively reduced.

The invention discloses a clock skew calculation and compensation system and method for a PLC module, the system comprises a clock correction module and the PLC module, the clock correction module is used for sending a first characteristic signal to the PLC module at an interval of delta T hours, and the first characteristic signal is used for calculating the clock skew of the clock correction module and the PLC module; and the PLC module is used for transmitting and / or receiving carrier data, receiving the first characteristic signal sent by the clock correction module, calculating a clock deviation value of the clock correction module and the PLC module according to the first characteristic signal, and performing clock compensation on the carrier data to be transmitted or received according to the clock deviation value. The system and the method can eliminate reception performance reduction caused by clock skew between the PLC modules, can obviously improve communication efficiency and success rate of the PLC modules, and can save installation time and reduce maintenance resources in field use.

The present application discloses a radio frequency circuit, a radio frequency circuit control method, device and electronic equipment, belonging to the technical field of electronic equipment. The radio frequency circuit includes first and second radio frequency transceivers, first, second and third radio frequency modules, double-pole double-throw switches, first, second and third antennas, and the connection between the third antenna and the second antenna is The isolation degree is greater than the isolation degree between the first antenna and the second antenna; the first port of the first radio frequency transceiver is connected to the first end of the first radio frequency module, and the second end of the first radio frequency module is connected to the double pole double The throw switch is connected with the first antenna and the third antenna; the second port of the second radio frequency transceiver is connected with the first end of the second radio frequency module, and the second end of the second radio frequency module is connected with the first end of the second radio frequency module through the double pole double throw switch. An antenna is connected to the third antenna; the third port of the second radio frequency transceiver is connected to the second antenna through the third radio frequency module. This solution solves the problems of difficult implementation and poor performance of RF circuit solutions for WIFI 5G and N79.

The invention discloses an overheat alarm plug for a hair dryer, which comprises a casing, the outer wall of the casing is inserted with two external electric posts, and the inner wall of the casing is fixed with two inner plugs corresponding to the positions of the two external electric posts. The side wall of the housing is provided with a turning slot, the inner wall of the turning slot is slidably connected with a turning plate, both ends of the turning plate are fixed with insulating plates, and the side wall of the turning plate is fixed with Two sets of shrapnel arranged symmetrically. The advantage is that when the temperature at the plug position rises to a certain level, the air bag will expand enough to make the connecting piece contact with the connecting piece, so that the lamp tube will flicker when it is powered on, and the user will be warned. Large and close to people's ears, the user's ability to receive external sounds is weakened, and the sensitivity to light is strong. Therefore, using flashing lights to warn has a better effect and enables users to respond faster.

A highly efficient radiation structure in a compact design is described. The structure is designed to receive over the air signals in the UHF frequency band. Unlike most of the current structures, the disclosure structure consists of an array of four radiating elements and are configured to perform an uniform reception along the horizontal plane and the elements are positioned in a circle or in a square configuration and are located near the outer edge of a circular or a square shape circuit board; the elements are efficiently combined by an unique four way power combiner which is specially designed to obtain the necessary impedance match to an input coaxial cable. The entire structure consist only a few simple parts. Namely, a circuit board with the top and bottom surfaces etched on with the radiating elements and associated feed lines. A coaxial feed line terminated with a feeding connector of the F type is provided. This coaxial line provides the necessary input connection to the circuit board and also routs the receiving signal to a TV. Two circuit board designs are disclosed; one is equipped with circular dipole arms while the second circuit board is equipped with the rectangular dipole arms. On the circular dipole element design, the array structure is implemented with a cone shape ground plane which is designed to help reduce the radiation coverage below the horizons. The square aperture array is implemented without the cone shape ground plane. Both structures are protected by a plastic enclosure and both structures are configured to be simple and can be made economically.

Combining the untrusted relay full-duplex transmission method and system with zero-forcing scrambling at the sink, the source A sends a secret signal x to the full-duplex relay R, and the sink B simultaneously sends the artificial noise interference signal v to the full-duplex relay R; full-duplex relay R receives y R , and use the amplification and forwarding protocol to forward the signal x R =βy R To the destination B, β is the amplification and forwarding factor; the destination B adopts the maximum ratio receiving strategy to design the receiving vector r=g B , the received signal is y B = r H (g B x R +n B ), n B N for sink B Br ×1 dimensional additive white Gaussian noise vector, N Br is the number of receiving antennas. The invention improves the transmission efficiency and effectively reduces the reception effect of the eavesdropping node on the secret signal.