118results about How to "Improve transceiver performance" patented technology

The present invention is a method and apparatus for optimizing performance of a transceiver selecting and processing an intermediate frequency free of significant interference, such as noise. A frequency band may be scanned to detect interference upon which an intermediate frequency free of significant interference may be selected. This may enhance performance of the receiver by reducing the effects of noise. Additionally, perrformance may be further optimized by adjusting the passband of the filter such that the center of the passband matches the selected intermediate frequency. This may provide stability as centering of the passband may account for process, voltage and temperature variations and errors. Further, performance may be enhanced by ensuring desirable signal attributes are passed through the filter.

A gatherer device of wireless ad-hoc network meter reading system comprises a processor unit, a 485 bus interface unit, a wireless transmitting-receiving unit, and a power supply managing unit; wherein the processor unit is responsible for operation and control of the whole device, the 485 bus interface unit is used for connecting one or multiple electric meters, the wireless transmitting-receiving unit is responsible for interacting data and commands with a concentrator of the wireless ad-hoc network meter reading system, and the power supply managing unit supplies power for the whole device. An operation method of the gatherer device comprises that a command is received by the wireless transmitting-receiving unit and transmitted to the processor unit for processing, that the processor unit sends a request frame to an electric meter, that the processor unit receives a response frame from the electric meter and analyzes the response frame to acquire information of electricity consumption, and that finally the information of electricity consumption is returned to the concentrator through the wireless transmitting-receiving unit. The device and the method in the invention solve problems that the prior micropower wireless communication meter reading manners have much channel interferences, and are relatively low in security, relatively short in communication distances and not well in penetrating capabilities. Furthermore, the device has the advantages of low cost, high cost performance, good instantaneity, safety and reliability, and use and maintenance conveniences.

The invention discloses a radiation device and an array antenna based on the radiation device. The low-frequency radiation device comprises a first low-frequency radiation module and a second low-frequency radiation module, wherein the first low-frequency radiation module is subjected to -45-degree polarization and the second low-frequency radiation module is subjected to +45-degree polarization; the first low-frequency radiation module and the second low-frequency radiation module are symmetrically, orthogonally and fixedly connected; and open circuit branches for preventing high-frequency electromagnetic waves from being transmitted in the low-frequency radiation device are respectively arranged at one sides of the axial centers of the first low-frequency radiation module and the second low-frequency radiation module. With the adoption of the radiation device and the array antenna, the abnormal-frequency interference can be reduced and the receiving-transmitting performance of the antenna is improved.

A transceiving circuit (1) for contactless communication comprises transmitter means (3) to generate an electromagnetic carrier signal, to modulate the carrier signal according to transmitting data and to drive an antenna (5) with the modulated carrier signal, and receiver means (4) to sense response signals being received at the antenna (5) and to demodulate the response signals. The transmitter means (3) are connected to the antenna (5) by at least a first transmitting path (TX1), wherein a first DC decoupling capacitor (C1b) is switched into the first transmitting path (TX1). A receiving path (RX) branches off from the first transmitting path (TX1) to the receiver means (4). A second DC decoupling capacitor (C1c) is switched into the first transmitting path (TX1) in series to the first DC decoupling capacitor (C1b). The receiving path (RX) branches off from the first transmitting path (TX1) at a branching point (C) between the first and second DC decoupling capacitors (C1b, C1c).

An embodiment of the invention discloses an integrated antenna package structure, which comprises a first substrate and a second substrate, wherein a first patch antenna is arranged on a first surfaceof the first substrate, the second substrate is connected to one side of a second surface of the first substrate, the second substrate is provided with a third surface and fourth surface which are opposite, the second surface is provided with a second patch antenna, a projection of the second patch antenna on the first surface is at least partially overlapped with the first patch antenna, a cavity is formed between the first and second substrates, the second patch antenna is separated from the second surface through the cavity, and the fourth surface is provided with a radio frequency component which is used for transmitting and receiving a radio frequency signal through the first patch antenna and the second patch antenna. The integrated antenna package structure has the advantages of low cost and large bandwidth.

The invention relates to the field of intelligent watches and discloses an intelligent watch antenna and an intelligent watch structure with an external antenna. A watch frame is changed into the watch antenna, the receiving face of the antenna can be externally arranged, in this way, the shielding influences of a metal watch shell and other components can be greatly reduced, the receiving effect can be improved, the situation that the antenna occupies the internal space of a watch can be avoided, and an internal movement and the whole watch can be miniaturized. In addition, material limit is not produced on the metal watch shell or the other components, the texture of the intelligent watch can be guaranteed, the intelligent watch has the advantages that the cost is low, and the overall structure is attractive and descent, and the intelligent watch can be conveniently applied and popularized in reality.

The invention provides an array antenna and an electronic device using the array antenna. The array antenna comprises a plurality of antenna elements, a first connecting wire and a second connecting wire. Each antenna element comprises a rectangular radiation zone, a first feeder and a second feeder. The first feeder and the second feeder are connected with the two adjacent feed-in angles of the rectangular radiation zone; and the first connecting wire and the second connecting wire are arranged on the two sides of the antenna element respectively, and connected with the other ends of the first feeder and the second feeder.

Systems and methods for controlling the modulation current of a laser included as a component of an optical transmitter, such as an optical transceiver module, are disclosed. Control of the modulation current, which affects various laser operational parameters, including extinction ratio and optical modulation amplitude, enables operation of the laser to be optimized, thereby enabling reliable transceiver performance to be achieved. In one embodiment, a method for modifying the modulation current in an optical transceiver module includes first sensing analog voltage data that proportionally relates to an actual modulation current of the laser. Once sensed, the analog voltage data are converted to digital voltage data. Using the digital voltage data, the actual modulation current of the laser is determined, then a desired modulation current is determined. Should a discrepancy exist between the actual and desired modulation currents, the actual modulation current is modified to match the desired current.

Fractional Spaced Equalizer FSEQ having adjustable coefficients ci for equalizing a reception signal of a transceiver, wherein said transceiver comprises an echo compensator EC which generates an echo compensation signal for compensating an echo signal of said transceiver, wherein said echo compensation signal is subtracted from said reception signal equalized by said fractional spaced equalizer FSEQ by means of a subtractor and wherein the adjustable coefficients ci of said fractional spaced equalizer FSEQ are set after a half-duplex training phase of said transceiver during which said echo compensator EC is deactivated.

The invention discloses an antenna apparatus for a wearable device and a wearable device. The antenna apparatus is composed of a first antenna, a second antenna, a first change-over switch, and a radio frequency unit. The first change-over switch and the radio frequency unit are arranged on a PCB; and one end of the first change-over switch is connected with the second antenna and the other end isconnected to the radio frequency unit or a reference ground on the PCB in a switchable manner. If the first antenna works at a frequency band less than a preset threshold, the radio frequency unit isused for controlling the other end of the first change-over switch to be switched to the reference ground. And the radio frequency unit is also used for controlling the other end of the first change-over switch to be switched to the radio frequency unit when receiving an instruction for indicating the second antenna to receive and send signals. According to the antenna apparatus, the second antenna in a non-working state is used as an extended reference ground of the first antenna in a working state, so that the receiving and sending performances for signals with the frequency bands less thanthe preset threshold of the first antenna are improved.

The present invention discloses a mobile terminal antenna multiplexing system and a control method thereof and a mobile terminal. The mobile terminal antenna multiplexing system comprises a radiatingbody, multiple antenna accesses, a CPU processor and a radio frequency module, each antenna access comprises one feed point, one matching module and one switching module. The antenna radiating body ofthe mobile terminal is provided with a plurality of feed points, each feed point is connected with one switch, the each feed point is provided with one independent matching circuit, the mobile terminal controls the on-off switch of the switch through the CPU processor according to the concrete application demand and the environmental state of the mobile terminal so as to change the resonant frequency of the corresponding antenna, corresponding antenna accesses are selected through the radio frequency modules to achieve antenna multiplexing. On the premise without increasing the number of themobile terminal antennas, the mobile terminal antenna radiators can be more intelligently and reasonably utilized, and the frequency coverage and the receiving and transmission performances of the mobile terminal antennas are improved.

The invention discloses a switching method of a terminal antenna, a device and a mobile terminal. The method comprises the following steps: determining whether a terminal communicates based on a preset communication frequency band; if determining that the terminal communicates based on the preset communication frequency band, acquiring a signal intensity value of the preset communication frequency band; when judging that the signal intensity value is less than a preset signal intensity threshold, detecting whether an external antenna is accessed into the terminal; if detecting that the external antenna is accessed into the terminal; controlling the terminal to switch to the external antenna to communicate. Therefore, the terminal is controlled to switch to the external antenna to communicate when a low-frequency band signal received by a built-in antenna of the terminal is bad. Since the frequency band range of the external antenna is wider than that of the built-in antenna of the terminal, and the performance of the external antenna is better than that of the built-in antenna, the terminal is controlled to switch to the external antenna to communicate, thereby effectively improving the transmitting-receiving capacity of the terminal to the low-frequency band signal.

An embodiment of the invention provides a data transmission method and a data transmission device. The data transmission method comprises the steps of: modulating information bits to be transmitted according to a lower-order constellation diagram to generate 4m lower-order modulation symbols; multiplying a precoding matrix Q with column vectors formed by the 4m lower-order modulation symbols to obtain 4m higher-order modulation symbols to be transmitted corresponding to a higher-order constellation diagram; and transmitting the 4m higher-order modulation symbols to be transmitted on different corresponding carriers of two antennas separately. The higher-order modulation symbols to be transmitted contain a part of or all of the information bits to be transmitted, and therefore, the same signal can be simultaneously transmitted on different carriers of a plurality of antennas, thereby achieving frequency diversity and space diversity, and accordingly improving the transmission and receiving performance of data transmission.

The invention relates to an intelligent electrically-controlled directional wireless router which comprises a router body (1), a router working chipset (9), a plurality of antennas (2), a directional control module (8) and a plurality of electrically-controlled wireless signal directional devices, wherein the router working chipset (9) is arranged in the router body (1), and the antennas (2) are movably connected with the router body (1). Each electrically-controlled wireless signal directional device comprises a cambered surface signal transmitting screen (3), a bearing (6), a miniature motor (10) and an angle displacement sensor (11). Hardware modules are connected to form the intelligent electrically-controlled directional wireless router based on the technical scheme. Concentrated directional radiation can be automatically realized according to a wireless signal transmitted by the antennas (2) based on mutual communication of the router and the router working chipset (9), working stability of the wireless signal can be effectively ensured, and the working efficiency of the wireless signal is improved.

The invention relates to a MIMO onboard communication system performance evaluation method. A multi-hop scattering model is equivalent to a single-point scattering model through geometric transformation based on a traditional ellipse model through the system, and the performance of a MIMO multi-antenna system is evaluated through the spatial fading correlation, the channel capacity and the Doppler parameter; a receiving end of the MIMO onboard communication system is that at least one group of array elements is a circular array of an omnidirectional antenna; and the system performance is evaluated according to three information parameters of the spatial fading correlation function as shown in description, the MIMO multipath channel capacity as shown in description and the Doppler spectrum distribution function as shown in description. The MIMO onboard communication system disclosed by the invention has the advantages that three performance evaluation parameters of the spatial fading correlation coefficient, the MIMO multipath channel capacity and the Doppler parameter are introduced to analyze the advantage of a transmitting end directional antenna array relative to the omnidirectional antenna array; the system performance of the directional antenna array is superior to the system performance of omnidirectional antenna array by discovering from the relation between the system performance and the Poda signal distribution and the directional antenna beam direction.

The invention relates to a micro-grid data gateway device and a data converting method. The device includes a main controller, a buffer module and a driver module, wherein the driver module is used to respectively receive micro-grid data by an RS485 interface and an RS232 interface, drive the RS485 interface and the RS232 interface work in full duplex, and transmit received micro-grid data to the main controller through the buffer module. The data converting method comprises: collecting a source protocol data frame data by an Internet to transmit it to the main controller, or collecting the source protocol data frame data by the RS 485 interface or the RS232 interface to transmit it to the main controller through the driver module and the buffer module, performing, by the main controller, a protocol conversion on the source protocol data frame data, and transmitting it to the Internet by Ethernet or to the RS 485 interface and the RS232 interface by the buffer module and the driver module.

The invention provides a single-phase control node device of a wireless sensor network which relates to the technical field of the wireless sensor network of various applications such as livestock facility cultivation and environmental monitoring for plant facility cultivation, etc. The device consists of a data communication part and an executive equipment driving part, wherein, a storage unit and a wireless transceiver, etc. in the data communication part are respectively connected with a processor unit; a silicon-controlled triggering unit and an executive equipment state output unit in the executive equipment driving part are respectively connected with the silicon-controlled control unit and connected with the processor unit of the data communication part respectively by corresponding interfaces thereof; the wireless transceiver unit of the device sends a base station control command sent by the sensor network to the processor unit for processing and controls the turn on or off of the executive equipment by the silicon-controlled control unit; the processor unit acquires the state information of the executive equipment by a state output unit of the executive equipment and carries out processing at the base station by a router of the sensor network through the wireless transceiver unit.

The invention relates to an SIM antenna capable of balancing a communication distance in a mobile payment transfer bridge scheme. The SIM antenna is formed by connecting a spiral winding coil of a bottom metal of an SIM card and a spiral winding coil of a top metal of the SIM card in series by two through holes, wherein the spiral winding coils are arranged on the edge of the SIM card and mutually interleaved but not laminated. Two ports of the antenna are arranged the circuit connection position on the SIM card in the antenna coils and the middle of the antenna is used for encapsulating a chip of the SIM, an SIM chip of a QSIM and correlated circuits. When a mobile phone with strong shield is designed to receive signal and the resonance is 13.56MHz, the antenna inductance of the mobile phone with weak shield is increased, the antenna automatically detunes and the receiving signal is less amplified or suppressed; the circuit in the mobile phone with strong shield is matched with the antenna impedance at an emission frequency of 6.78MHz in an impedance matching network, the antenna inductance value of the mobile phone with weak shield is increased, the automatic impedance match detunes, the emission power is reduced, the communication distances of different mobile phones are balanced, the dispersion of the communication distances of the mobile phones is reduced, thus the mobile phone communication distance control without calibration is realized.

The invention discloses a follow-up tracking WIFI transmission device and a control method thereof. The device includes a cloud deck controller, and an acceleration sensor, a geomagnetic sensor, a Beidou navigation receiver, a wireless communication unit, a WIFI unit and an antenna cloud deck connected to the cloud deck controller. The device also includes a directional antenna arranged on the antenna cloud deck. The directional antenna is connected to the WIFI unit. The control method includes determining the coordinates of the device itself through Beidou satellite signals and sending the coordinate information to other access points; determining an optimal communication chain according to the combination of a routing algorithm and the coordinate information of the whole communication access point combined; determining the posture information of the device itself through the geomagnetic sensor; calculating the antenna azimuth angle and controlling the antenna cloud deck for antenna alignment. According to the invention, long range WIFI communication is realized and a problem of dynamic moving network construction of multiple access points when using the directional antenna is solved. Effects in aspects of prolonging WIFI communication distance, improving communication security, improving network invulnerability, reducing electromagnetic interference and the like are obvious.

The invention discloses an MIMO multiantenna communication system. The system comprises a transmitting end and a receiving end. The transmitting end and the receiving end are equipped with uniform spherical MIMO antenna arrays. The invention also provide a performance evaluation method for the MIMO multiantenna communication system. The provided system is described through scatterer Gaussian distribution. A spatial Gaussian distribution density function expression is determined. A joint probability density function of an angle of divergence (AOD) of a single-time bounce SBM component is expressed. An edge PDF of the angle of divergence (AOD) of a single-time bounce path SBM in the system is provided through utilization of integral of the joint PDF on a path length interval component. Fourier transform is carried out on pulse response h<pq>(t) to obtain a time varying transfer function. A frequency cross-correlation function is expressed. According to the system and the method, throughimporting of the spatial autocorrelation function, and temporal and frequency cross-correlation functions between two array elements pq, performance of the MIMO multiantenna communication system is evaluated, and the performance of terminal antenna arrays and a wireless communication system is optimized.

The invention discloses a radio frequency circuit and electronic equipment, and the radio frequency circuit comprises a radio frequency transceiver, a first radio frequency module, a second radio frequency module, a third radio frequency module, a combiner module, a first switch assembly, and a first antenna. The radio frequency transceiver is electrically connected with the first end of the first radio frequency module, the first end of the second radio frequency module and the first end of the third radio frequency module. A first port of the combiner module can be electrically connected with a second end of the first radio frequency module or a second end of the second radio frequency module through the first switch assembly, a second port of the combiner module is electrically connected with a second end of the third radio frequency module, and a third port of the combiner module is electrically connected with the first antenna; and under the condition that the first antenna receives the first radio frequency signal and the second radio frequency signal, the combining module is used for transmitting the first radio frequency signal to the third radio frequency module and transmitting the second radio frequency signal to the first radio frequency module or the third radio frequency module. Therefore, the number of antennas of the radio frequency circuit can be reduced.

The invention discloses a user-mode file sending method, a file receiving method and a file sending and receiving device. The file sending method comprises the following steps: allocating a data reading and sending area, a data receiving and writing area and a data buffer area in the user-mode area; creating a data sending process; obtaining a file to be sent corresponding to the data sending process from the data buffer area; constructing metadata of the data sending process and recording the metadata to the data reading and sending area; sequentially processing one or more metadata of the reading and sending area, wherein the processing of the metadata comprises sending the file to a network adapter via a user-mode network device driver, and sending the file by the network adapter. According to the technical scheme of the invention, the data receiving and sending are completed by using the user-mode space of the data receiving and sending process, and the kernel state space of the process is not needed to completely shield the kernel, that is, the copy, the context switching, and the interruption can be remarkably reduced, and the performance of the data sending and sending is improved.

The invention discloses a performance evaluation method for an MIMO (Multiple Input Multiple Output) multi-antenna system and the multi-antenna system. The system assumes that a channel matrix complies with a zero-mean spatial white noise model at the transmitting end, and a group of linear arrays of which array elements are directional antennae are arranged at the receiving end of the system. According to the performance evaluation method for the MIMO multi-antenna system, the directional antenna array elements are introduced into linear antennae, so that a spatial statistics channel model is effectively expanded, the transmitting and receiving performances of an MIMO multi-antenna array are deepened, and the performances of a terminal antenna array and a wireless communication system are optimized; by introduction of spatial fading correlation coefficients and performance evaluation parameters such as MIMO multi-path channel capacity and error code rate, the advantages of a directional antenna array relative to an omnidirectional antenna array are analyzed, and the system performance of the directional antenna array is superior to that of the omnidirectional antenna array according to a relationship among the system performance, the distribution of arrival signals and the direction of a directional antenna beam.

The invention discloses a Sub. 6 antenna and millimeter wave antenna coexist structure, method and mobile terminal, the structure comprises a Sub-6 antenna and millimeter wave antenna, the sub-6 antenna and millimeter wave antenna are arranged in an inlaid manner, the millimeter wave antenna is embedded in the Sub-6 antenna, the method comprises th following steps: arranging a Sub-6 antenna on themobile terminal; embedding the millimeter-wave antenna in the Sub-6 antenna without affecting Sub-6 antenna performance, thereby realizing coexistence of the Sub-6 antenna with the millimeter wave antenna. The Sub-6 antenna and millimeter wave antenna are arranged in an inlaid manner, the millimeter wave antenna is embedded in the Sub-6 antenna, coexistence of the Sub-6 antenna with the millimeter wave antenna is realized, and performance of the Sub-6 antenna and millimeter wave antenna is not affected, the space utilization of the mobile terminal is improved, smaller space is effectively utilized to achieve full coverage of 5G frequency band, and the frequency coverage and transceiving performance of the mobile terminal antenna are improved.

A novel mechanism for sharing filter taps across a plurality of interference cancellers. Each interference canceller may be directed to impairment, such as Ethernet impairments, including Ethernet 1000Base-T impairments. Various interference impairments include echo cancellation, NEXT cancellation and / or other interference detection or cancellation, etc. The hardware requirements of the interference impairment cancellers are reduced by sharing filter taps among the cancellers. In a first embodiment, the taps from a unified filter tap bank are shared across all the interference impairment cancellers for all four channels and over all ports. In a second embodiment, a portion of the taps of each filter are shared wherein each canceller comprises a fixed filter tap portion and a shared filter tap portion. A tap allocation algorithm assigns taps to those cancellers that need them the most. A canceller configuration is selected that yields maximal interference mitigation and the taps are allocated accordingly.

The invention discloses a mobile phone antenna. The mobile phone has an all-metal housing and the mobile phone antenna is a slot one arranged on the all-metal housing. According to the mobile phone antenna, regular currents can be excited by two sides of the slot and thus the flow of the regular currents can form effective radiation. Therefore, a resonance point of the antenna can be adjusted by adjusting the length of the slot, so that the antenna has a good transceiving effect and low manufacturing cost.

The invention provides an impedance matching circuit and (a) transmitting-receiving device and equipment, relates to the technical field of communication, and aims at solving the problem that a present transmitting-receiving circuit causes low transmitting-receiving performance of a terminal in the broadband and further influences the transmission performance of the terminal in the broadband. Theimpedance matching circuit comprises a transmitting-receiving module, first and second amplification modules connected to the transmitting-receiving module, and a target matching module connected to the first and second amplification modules; the target matching module comprises M matching units, and M represents an integer greater than or equivalent to 3; and each among the M matching units is used to adjust the target resistance of the first or second amplification module under the condition that the working frequency of the transmitting-receiving module is in different frequency intervals.

The present invention provides a terminal signal transmit-receive device. The device comprises a master antenna and an auxiliary antenna which are used for transmitting and receiving radio frequency signals, a master antenna matching circuit and an auxiliary antenna matching circuit which are respectively connected with the master antenna and the auxiliary antenna, a combiner configured to overlap the signals received by the master antenna and the auxiliary antenna and a power divider configured to distribute signals emitted by the terminals and send the signals to the master antenna and the auxiliary antenna. The auxiliary antenna can effectively improve the transmit-receive performance of signals of a terminal.

The invention provides a wireless device and a manufacturing method of antenna thereof. The wireless device comprises a shell and a printed circuit board (PCB), wherein, a conducting material is applied to the inner side of the shell; one end of the conducting material is connected with a grounding point of the PCB, the other end of the conducting material is connected with a feed point of the printed circuit board; and the printed circuit board between the ground point and the feed point and the conducting material form the antenna of the wireless device. By the processing, the method saves materials and space of the built-in antenna on the PCB and improves the transceiving performance of the antenna.