294results about How to "Improve signal reception" patented technology

A method of communicating data in a system having a plurality of transmitters each adapted to transmit a radio signal, and a receiver situated at a distance from the transmitters to receive and process the signals transmitted by the transmitters, information for transmission being subdivided into N-bit symbols, the method consisting in:giving a numerical value to each symbol; andcompressing the data using a CHIP encoding technique in which the values of the symbols are transposed to an encoded value having x digits in a base B, each digit subsequently being represented in the form of n chips, the base B, the number n of chips, and the number x of digits for an encoded value satisfying the following conditions: so that the total number of chips x.n representing the coded value is less than 2.N.

The present invention discloses a multi-band antenna, especially a fractal antenna which allows a convenient reception of a signal for communication. The multi-band behavior is obtained by a set of geometry patterns of the same basic elements. The materials of the antenna may be formed by a chemical solution or a sputtering vacuum deposition process. An additional passivation layer can be added to protect the conducting layer of the antenna. Materials for this passivation layer are made, for instance, of oxide, or any other polymeric material, polymer, or resin coating on the structure.

System and method for wirelessly providing multimedia. A system includes a headset and a wireless communications device. The wireless communications device controls the operation of the headset with transmissions over a first wireless network. The headset includes a first ear piece, a second ear piece, and a connecting piece. The first ear piece has a first speaker, a first network interface to send and receive transmissions over the first wireless network, a second network interface to receive transmissions over a second wireless network, and a connecting piece. The connecting piece is coupled between the first ear piece and the second ear piece. The connecting piece includes a wire to electrically couple the second ear piece, the first ear piece, and the second network interface and to receive transmissions over the second wireless network. The wire may be made to any length since it may be embedded inside the connecting piece.

The velocity of a wireless communications device (106) is estimated. In response to this estimate, a filter bandwidth, such as a pilot filter (310) bandwidth, is adjusted so that the introduction of noise and distortion to a signal received by the device is mitigated. The filter bandwidth is adjusted by increasing it as the estimated velocity increases; and decreasing it as the estimated velocity decreases. Such adjustments may be accomplished through providing a number of predetermined bandwidths that each correspond to a particular velocity range, and setting the filter bandwidth to the predetermined bandwidth that corresponds to the estimated velocity.

A method for acquiring and maintaining Global Positioning System (GPS) synchronization is provided for use in the wireless communication system. The method includes receiving, by at least one Global Positioning System (GPS) receiver, GPS absolute time information and GPS information from at least one GPS satellite; transmitting, from the at least one GPS receiver, to a base station, reference time information generated based on the GPS absolute time information; and generating, by the base station, base station absolute time information based on the reference time information.

The invention discloses a ground control method for underground sliding sleeves. The ground control method comprises the steps as follows: a ground electromagnetic wave emitting device generates command information for controlling opening or closing of a plurality of underground sliding sleeves according to input control commands, and the command information is sent to the underground sliding sleeves after amplification; an electromagnetic wave receiving device arranged in each underground sliding sleeve receives the command information sent from the ground, and the command information is compared with respective pre-assigned control commands; if the command information is not consistent with the assigned control commands of the underground sliding sleeves, the underground sliding sleeves which are not consistent with the command information do not act and continuously wait for next ground command information; and if the command information is consistent with the assigned control command of one underground sliding sleeve, the underground sliding sleeve acts and finishes opening or closing operation required by the command information. According to the ground control method for the underground sliding sleeves, opening and closing actions of the underground sliding sleeves can be remotely controlled by the ground electromagnetic wave signals and can be controlled in real time, and further, ball pitching is not required.

The invention provides a metal plate micro-defect detection method based on nonlinear Lamb waves. The metal plate micro-defect detection method comprises the following steps of: S1, acquiring a phasevelocity frequency dispersion curve and a group velocity frequency dispersion curve of a metal plate; S2, acquiring an excitation frequency, Lamb waves of a specific mode and an incident angle of theLamb waves of the specific mode as model parameters according to the phase velocity frequency dispersion curve and the group velocity frequency dispersion curve; S3, deriving a relative nonlinear coefficient beta' according to the Lamb waves of the specific mode in the S2, wherein the relative nonlinear coefficient beta' is used for representing the depth of a defect; S4, establishing a nonlinearultrasonic test system according to the model parameters; and S5, testing the metal plate according to the nonlinear ultrasonic test system established in the step S4, judging whether the relative nonlinear coefficient beta' is reliable or not, and if so, representing the defects of the tested metal plate by utilizing the relative nonlinear coefficient beta'. According to the metal plate micro-defect detection method, the relative nonlinear coefficient beta' represents the defects of the tested metal plate, the defects of the metal plate can be effectively represented, and the detection precision is improved.

A method and system are disclosed for communication within a TDMA based system. The system may include one or more receivers, each receiver being configurable in a plurality of states, wherein in each state the physical layer headers associated with received frames of information are used to determine the format in which the received frames of information are to be decoded.

An antenna has a base, a rotating base, a supporting arm, an antenna body and a positioning device. The rotating base is rotatably mounted on the base. The supporting arm is pivotally connected to the rotating base. The antenna body is pivotally attached to the supporting arm. The positioning device is mounted between the supporting arm and the rotating base to support the antenna body at a desired position. Accordingly, the antenna body can be adjusted to a desired angle, direction and height so as to provide an excellent signal-receiving effect.

A multi-function wireless detecting device is described. The multi-function wireless detecting device includes a monitoring pen and a wireless detector module to be carried conveniently and controlled easily. The wireless detector module includes at least one environmental parameter detector, and the monitoring pen utilizes wireless technology to control the wireless detector module and displays the data measured by the wireless detector module. The environmental parameter detector preferably includes a temperature detector and a gas concentration detector disposed on both sides of a baseboard of the wireless detector module. The gas concentration detector further includes an alcohol concentration detector, a CO concentration detector, a CO₂ concentration detector, a fuel gas concentration detector, or a combination thereof. The environmental parameter detector may further include a humidity detector.

The invention discloses a frequency-reconfigurable microstrip patch yagi antenna, which comprises a three-layer structure. The first layer of the three-layer structure comprises a first dielectric substrate. A coupling microstrip line, a direct current bias circuit and a metal through hole are arranged on the upper surface of the first dielectric substrate. An impedance conversion line, a reflection patch, an active patch and a director patch are arranged on the lower surface of the first dielectric substrate. The reconstruction method of the yagi antenna is as follows: a direct-current voltage is added across the two ends of the liquid crystal material, and the direct-current voltage is loaded on a medium below the active patch through the metal through hole via a T-shaped bias device. Inthis way, the effective dielectric constant of the liquid crystal material can be changed by changing the voltage of the direct current bias circuit, and then the working frequency of the yagi antenna is changed. According to the scheme, the antenna and the method are adopted, and the frequency reconstruction of the antenna is convenient. The reconstructed antenna is easy to integrate, and the processing difficulty of the antenna is reduced. Meanwhile, a main lobe beam can be concentrated between the side shooting direction and the end shooting direction, and the signal receiving effect is better.

The present invention is related to a structure for inverted F plane antenna, which is on a surface of a PCB by way of etching. The antenna comprises a pair of parallel sections constructed by a first parallel section, a second parallel section and a vertical section perpendicular to the two parallel sections, wherein the first parallel section connects to a grounding end of the PCB electrically, the second parallel section connects to a power end of the PCB, the vertical section has a bending portion with U shape to increase the length of receiving signals, therefore reflection signals may be highly decreased, and functions of receiving/emission stronger power are then achieved and receiving/emission band width is increased; further, under conditions of not extending the length of the vertical section and shrinking the volume of the antenna shall upgrade the convenience of the design.

The present invention relates to an antenna apparatus with steerable beam pattern, an RF transceiver comprising the antenna apparatus and a mobile device comprising the antenna apparatus. The antenna apparatus according to the present invention is attachable to the front-end of a transceiver circuitry and comprises at least two balanced radiation elements forming a planar structure, for transmitting and/or receiving a corresponding number of partial signals, a signal splitter and/or combiner for splitting a signal received from an attached transceiver circuitry into said partial signals and/or combining said partial signals into a signal to be transmitted to an attached transceiver circuitry, a phase shifter device operable to apply relative phase shifts between at least two of said partial signals, whereby said relative phase shifts are selectable from a group of at least two relative phase shift values provided by said phase shifter device.

The invention relates to a manch type antenna device of a car radio which is used to receive at least one wireless electric band signal before it is connected with a wireless electric receiving circuit. It comprises a manch type external cover, an AM antenna, a signal amplifying circuit plate, a FM vibrator antenna circuit positioned on the signal amplifying circuit plate and a mental base, wherein the AM antenna and the FM vibrator antenna circuit are designed separately; the FM vibrator antenna circuit uses a plurality of inducers to form the vibrator circuit and can connect the mental base to reinforce the signal receiving ability of the FM vibrator antenna circuit.

The invention provides an integrated multimedia teaching system which comprises a base, a support box, a workbench a teaching host computer, wherein a power supply device and a sound box are arranged in the support box; a mounting groove is formed at one side of the upper surface of the workbench; a groove is arranged at the bottom of the mounting groove; a foldable high-shooting instrument is arranged in the groove; a foldable connecting rod is arranged on the other side of the upper surface of the workbench; an object exhibition device is connected with the foldable connecting rod; the teaching host computer is embedded in the upper surface of the workbench; a remote teaching module is arranged on a chassis; the remote teaching module comprises a central control device and a plurality of studying devices and a data transmission module which are connected with the central control device. The multimedia teaching, video/audio playing, courseware making, recording and broadcasting and remote teaching are integrated in the multimedia teaching integrated system, the remote real guide and the network resource downloading can be realized through a remote teaching module, and the interactivity of the multimedia teaching can be enhanced by an interaction switching module.

The invention relates to a radar communication antenna capable of accurately adjusting signal receiving height and orientation, comprising a base, a base frame is welded on the base, and a base cover is welded on the top of the base frame; the base frame is provided with a guide groove in a spiral structure, the base frame The outer wall is equipped with a support sheet in a spiral structure, and a guide chute in a spiral structure is arranged on the support sheet; a ring-shaped guide mechanism is installed at the lower end of the base cover, and a rotating gear is installed at the lower end of the ring-shaped guide mechanism. The left and right sides of the rotating gear Both ends are meshed with a driving mechanism; a sliding mechanism is installed in the guide chute, and an antenna mechanism is installed on the sliding mechanism; a winding mechanism is installed on the lower surface of the rotating gear, and the driving mechanism, rotating gear, ring guide mechanism, The mechanism, the sliding mechanism and the antenna mechanism cooperate to move to complete the spiral lifting and guiding process of the antenna mechanism. The invention can realize the functions of stable automatic spiral lifting signal height of radar antenna and precise adjustment of signal receiving azimuth.

The invention relates to an automobile rear window glass printing antenna system, in particular to a frequency-modulation and amplitude-modulation printing antenna which is arranged on the rear window glass and connected with an antenna amplifier; the automobile rear window glass printing antenna system which is connected with a demisting and defrosting power supply is especially suitable for being used as acoustic antennas of middle-class and high-class cars. The automobile rear window glass printing antenna system is characterized in that the automobile rear window glass is provided with a frequency-modulation and amplitude-modulation printing antenna; the frequency-modulation printing antenna is provided with a plurality of antennas; the amplitude-modulation printing antenna is provided with a plurality of antennas; the printing antenna output terminals of the frequency-modulation printing antenna and the amplitude-modulation printing antenna are respectively connected with the antenna amplifier by an over-bridge wire; the frequency-modulation printing antenna is externally connected with a band stop filter which is connected with the anode of the power supply; one side of the frequency-modulation printing antenna is provided with an elastic contact sheet which is connected with the band stop filter which is externally connected with the anode of the power supply; the other side of the frequency-modulation printing antenna is provided with an elastic contact sheet and a grounded band stop filter; and one end of the grounded band stop filter is connected with the elastic contact sheet and the other end thereof is grounded.

In one embodiment of the present invention, an antenna arrangement apparatus includes a dipole reception antenna including a first pole portion and a second pole portion. A length of coaxial cable is provided and constitutes a feedline, the length of coaxial cable including a proximal end with respect to the first and second pole portions. The proximal end of the length of coaxial cable is coupled to the first and second pole portions via a common-mode filter.

The present invention relates to a dual-frequency inverted-F antenna. It includes a grounding metal strip, a first radiation metal strip, a second radiation metal strip, a short-circuit metal arm and a feeding-in coaxial transmission line. Said invention also provides the concrete action of the above-mentioned every component, and also provides the connection mode of all the above-mentioned components. Said invention can utilize single path, and not only can cover wireless region network 2.4 GHz, but also can meet the requirement for covering all-band 5.2 and 5.8 GHz frequency band.

The invention discloses an integrated GNSS deformation monitoring device. The integrated GNSS deformation monitoring device comprises an observation pillar, a GNSS antenna (11) and a GNSS receiver (6), wherein the observation pillar comprises an observation cylinder body and an observation base (1), and an integrated observation structure is arranged on the top of the observation cylinder body; and the integrated observation structure comprises an installation disc (7) and an antenna cover (10) which together form hemispherical installation space, the GNSS antenna (11) is a disc-shaped activeantenna which is arranged in the right middle of the installation space, a GNSS antenna installation support (9) used for fixing the GNSS antenna (11) is arranged between the GNSS antenna (11) and theinstallation disc (7), the GNSS receiver (6) used for receiving signals from the GNSS antenna (11) is arranged inside the observation cylinder body, and holders which can rotate around the observation cylinder body are arranged on the outer side of the observation cylinder body and are fixedly provided with a rainproof case (5) and a solar cell panel (2). The integrated GNSS deformation monitoring device makes rapid installation and debugging possible, so that installation time and debugging time of the monitoring device are greatly saved.

The invention discloses a wireless terminal signal receiving method, a device and a wireless terminal, the wireless terminal comprises a main antenna and an auxiliary antenna, and the method comprises the following steps: carrying out weighting operation on signals received by the main antenna and the auxiliary antenna when the wireless terminal is in the receiving state, and the auxiliary antenna is conducted; and sending the signals after the weighting operation to a control chip of the wireless terminal for completing the receiving of the signals. The invention provides the wireless terminal signal receiving method, the device and the wireless terminal, one or more auxiliary antennas are increased on the basis of one main antenna for carrying out auxiliary receiving, thereby carrying out the weighting operation on the signals of the main antenna and the signals of the auxiliary antenna, and further enhancing the signal receiving effect of the wireless terminal.

The invention provides an auto-antenna electronic product, including a body part, a cover part, an antenna part, and a driving device; the cover part and the antenna part are rotatablely set on the body part and connected with each other through the driving device. When rotating relatively to the body part, the cover part can drive the antenna part into rotation.