318results about How to "Stable reception" patented technology

An enhanced 8-VSB reception system and E8-VSB data demultiplexing method, by which an E8-VSB signal can be stably received as well as a previous ATSC 8VSB signal, is disclosed. Herein, the enhanced data are coded at ½ code rate and ¼ code rate in the new E8-VSB transmission system compatible with the conventional ATSC 8VSB system, respectively. The ½ and ¼ enhanced data are multiplexed by 164-byte packet unit according to the previously determined multiplexing format and further pre-processed to output as the format of the MPEG transport packet. And, the pre-processed enhanced data and the main data are multiplexed again by 188-byte packet unit according to the previously determined multiplexing format. The E8-VSB map information, which was inserted in the field sync section in the E8-VSB transmission system to be transmitted, is extracted to generate the information indicating the attributes of the respective E8-VSB data. The normal data, ½ enhanced data, and ½ enhanced data are separated from each other to be decoded in the channel decoder.

Provided is a digital multimedia broadcasting (DMB) system that can provide a multimedia data broadcasting service having an excellent reception quality, a method thereof, and a computer-readable recording medium for recording a program that implements the method. The DMB system includes an encoding unit for encoding an inputted audio / video signal; a synchronizing unit for synchronizing media stream, additional data, interactive service objectifying data that are outputted from the encoding unit; a multiplexing unit for multiplexing the media stream outputted from the synchronizing unit; an error correction encoding unit for performing additional error correction encoding on the media stream outputted from the multiplexing unit; an interleaving unit for removing temporal correlation between adjacent byte units within a data stream outputted from the error correction encoding unit; and a transmitting unit for transmitting a DMB media stream outputted from the interleaving unit to the conventional DAB system and other digital broadcasting systems.

An enhanced 8-VSB reception system and E8-VSB data demultiplexing method, by which an E8-VSB signal can be stably received as well as a previous ATSC 8VSB signal, is disclosed. Herein, the enhanced data are coded at ½ code rate and ¼ code rate in the new E8-VSB transmission system compatible with the conventional ATSC 8VSB system, respectively. The ½ and ¼ enhanced data are multiplexed by 164-byte packet unit according to the previously determined multiplexing format and further pre-processed to output as the format of the MPEG transport packet. And, the pre-processed enhanced data and the main data are multiplexed again by 188-byte packet unit according to the previously determined multiplexing format. The E8-VSB map information, which was inserted in the field sync section in the E8-VSB transmission system to be transmitted, is extracted to generate the information indicating the attributes of the respective E8-VSB data. The normal data, ½ enhanced data, and ½ enhanced data are separated from each other to be decoded in the channel decoder.

The invention discloses a multi-dimensional fast acquisition method and system for satellite signals. The acquisition system comprises a digital intermediate frequency mixer, a local code generator, a partial matching filter (PMF), a fast Fourier transform (FFT) module, an acquisition detection module, an acquisition verification module and an acquisition judgment module; the technical problems of limited detection frequency offset range, high hardware implementation complexity, long processing delay and the like a satellite signal acquisition algorithm under a high dynamic environment can be solved via the algorithms of frequency adaptive adjustment, partial matching filter, fast Fourier transform and the like; the method and the system have the remarkable advantages of simple structure, low technical implementation complexity, short processing delay, large detection frequency offset range and the like, wherein the detectable Doppler frequency shift range is + / - 50 KHz, the Doppler frequency change rate is + / - 50 Hz, stable reception of radio communication under the extremely high dynamic environment having the flight speed of 20Ma and the acceleration of 180g can thus be realized, and the acquisition tracking time is less than 100ms.

An antenna device and an electronic device having the antenna device are provided. The antenna device includes a conductive film member including mesh grid areas formed by transparent wires and electrodes, and a radiation pattern path formed between the mesh grid areas. The electronic device includes a display including a touch panel, wherein the touch panel comprises a conductive film member including mesh grid areas formed by transparent wires and electrodes, and a radiation pattern path formed between the mesh grid areas.

The invention provides a mobile terminal and a method for controlling the same. The mobile terminal includes a touchscreen configured to receive a touch input; a wireless communication unit configured to perform wireless communication with an unmanned aerial vehicle having a camera to capture an external environment during flight; a sensing unit configured to sense a posture and movement of the mobile terminal; and a controller configured to control the wireless communication unit to transmit a flight control command to the unmanned aerial vehicle based on the touch input and the movement of the mobile terminal in a first mode in which the posture of the mobile terminal is disposed in a length direction with respect to gravity, and control the wireless communication unit to transmit a capture control command of the camera to the unmanned aerial vehicle based on the touch input along with the flight control command in a second mode in which the posture of the mobile terminal is disposed in a width direction with respect to gravity.

A slide-out electronic card connector includes a seat body and a slide cavity being defined between two opposite sides of the seat body. Multiple terminals are inlaid in the seat body. A cartridge snugly slidably disposed in the slide cavity of the seat body. An electronic card can be stably received in an electronic card receiving cavity of the cartridge and electrically connected with the terminals in the seat body when the cartridge with the electronic card is slid into the seat body. When the cartridge is slid into the seat body, a resilient latch arm is correspondingly latched in a fixing latch dent for preventing the cartridge from slipping out of the seat body. When a user outward draws the cartridge, the resilient latch arm is unlatched from the fixing latch dent, permitting the cartridge to be drawn out of the seat body and totally separated therefrom.

The invention manages to provide a stable and fast differential quantum key distribution method and system thereof. At transmitting end, with a continuous laser source, the quantum codes are prepared using two approaches: 1) using the beam-splitting, polarization-independent and phase-stabilizing approach to prepare the stable quantum code; 2) using polarization approach to directly prepare stable quantum code. At receiving end,differential phase-Faraday-Micheal test approach is used to directly receive the quantum information.

A voltage-controlled oscillator includes a voltage-controlled phase-shift circuit, outputting a signal with the shift deviated from an input signal by a specified amount with an external control voltage Vt, a SAW resonator, a buffer, inputting a resonance signal having a specified resonance frequency from the SAW resonator, outputting a clock signal with a desired frequency, and outputting a positive-feedback-oscillation-loop output signal, wherein the voltage-controlled phase-shift circuit, the SAW resonator, and the buffer construct a positive-feedback oscillation loop, in which the frequency temperature characteristic of the SAW resonator is rotated by a specified amount using the temperature characteristic of the propagation delay time of the buffer to correct the frequency temperature characteristic of the SAW resonator.

A receiver includes a demodulator that demodulates a modulation wave modulated according to orthogonal frequency division multiplexing (OFDM). The demodulator includes an interference wave detector that detects that received modulation wave includes interference wave when received power of each sample of the received modulation wave exceeds a threshold, and upon the detection, executes replacement processing of replacing a received signal exceeding the threshold with a predetermined value, a first interference wave power estimation unit configured to estimate interference wave power included in an OFDM symbol included in the received modulation wave on the basis of the number of samples that have been subjected to the replacement processing, and a demodulated data generator that demodulates the received modulation wave by executing demodulation processing of demodulating the received modulation wave that has been subjected to the replacement processing on the basis of the interference wave power.

A high frequency receiver capable of stably canceling interference by a transmission signal even if a transmission signal input from a TV antenna is changed. Phase shifter (212) for changing a phase of an interfering distributed transmission signal, detector (216) for detecting a level of a transmission signal included in a receive signal input via an antenna, and level regulator (213) for changing a level of the distributed transmission signal in accordance with this level are provided. A signal input via level regulator (213) and phase shifter (212) and a receive signal are synthesized to be input into mixer (206). Since a transmission signal can be cancelled even if a transmission signal input from an antenna is changed, a high frequency receiver can receive a signal stably when a transmission signal is changed.

In a cell phone, no consideration is given to a switch unit when a reception circuit for space diversity is added, and consequently an antenna can be optimally connected to the reception circuit for space diversity. The cell phone comprises a first antenna for radio communication, a transmission-reception circuit to exchange signals with a base station through the first antenna, and a GPS reception circuit to receive signals from the GPS satellite through the first antenna. The reception circuit receives a signal from the base station, a second antenna different from the first antenna is provided, and the switch unit changes over connections between the first antenna and the second antenna, and the transmission-reception circuit, the GPS reception circuit and the reception circuit according to operation modes.

A multi-path detection circuit can improve path detection accuracy in the environment where the path is located close in the extent of one chip in the multi-path detection circuit of CDMA type receiver unit. The multi-path detection circuit has generating means for generating a logic pattern of a correlated peak in the delay profile, and removing means for removing a power component of the detected correlated peak from the delay profile using the logical pattern of the correlated peak generated by the generating means.

A subscriber interface device and method for transmitting a communication signal and a broadcasting signal to each subscriber in a communication-broadcasting convergence FTTH system. A subscriber interface, positioned in the ONU, modulates a first predetermined number of broadcasting signals selected by a subscriber among broadcasting signals received from an OLT, combines a baseband communication signal received from the OLT with the modulated broadcasting signals, and optically transmits the combined communication-broadcasting signal. A subscriber interface receiver positioned in an ONT, splits the combined communication-broadcasting signal, filters the split signals to respective frequency bands, modulates the filtered broadcasting signals, transmits the modulated broadcasting signals to a monitor of the subscriber, and transmits the filtered communication signal as a baseband signal to a communication terminal of the subscriber instead of a passband signal.

A voltage-controlled oscillator includes a voltage-controlled phase-shift circuit, outputting a signal with the shift deviated from an input signal by a specified amount with an external control voltage Vt, a SAW resonator, a buffer, inputting a resonance signal having a specified resonance frequency from the SAW resonator, outputting a clock signal with a desired frequency, and outputting a positive-feedback-oscillation-loop output signal, wherein the voltage-controlled phase-shift circuit, the SAW resonator, and the buffer construct a positive-feedback oscillation loop, in which the frequency temperature characteristic of the SAW resonator is rotated by a specified amount using the temperature characteristic of the propagation delay time of the buffer to correct the frequency temperature characteristic of the SAW resonator.

A foldable knife comprises a blade having an end pivotally connected to an end of a handle, and a spring having two ends connected to the handle and blade respectively, so that the spring can apply a torque to the blade to rotate the blade out of the handle. A blocking element is provided at an inner portion of the handle. A switch element pivotally connected to the inner portion of the handle has a first end extended out of the handle. When the blade is completely received in the handle, a second end of the switch element bears against the blade. When the user pushes the first end of the switch element, a positioning portion formed on the blocking element is disengaged from an engaging portion formed on the blade, so that the torque of the spring drives the blade to spring out of the handle.

A receiver includes a tuning circuit for picking up a reception signal having a desired frequency, a local oscillator for forming an oscillation signal, a first mixer for frequency-converting the reception signal into an IF signal by using the oscillation signal, an IF filter for deriving the IF signal from an output signal of the first mixer, a signal forming circuit for forming an AC signal having a frequency equal to a frequency of the IF signal, a second mixer to be supplied with the AC signal and the oscillation signal, a deriving circuit for deriving a signal having a desired frequency or an image frequency from an output of the second mixer, and a detector for detecting a level of the IF signal, wherein a self test is performed by supplying the signal derived from the deriving circuit to the tuning circuit and checking a detection output level of the detector.

A photosensor includes a light emitting device, a light receiving device for receiving a side beam from said light emitting device, and a light diffusing member disposed between a side surface of said light emitting device and said light receiving device.

A terminal according to the present invention comprises a relaying unit. The relaying unit requests list information of sections to a remote site with respect to a content selected by an arbitrary entity and receives it therefrom. Then, the relaying unit receives sections pertaining to the content by requesting them to a remote site with reference to information included in the received list information. When a request for list information of the content is received from another entity, the relaying unit draws up list information for sections listed in the received list information and provides it to the another entity as a response to the received request. While drawing up the list information, the relaying unit changes remote source information about an arbitrary section listed in the received list information to local source information including a pathname assigned to a repository allocated for storing data of the arbitrary section.

In a MIMO system performing MIMO transmission using a plurality of antennas, BER characteristics are improved. A transmission device includes a mapping unit that maps a transmission signal onto the IQ plane to generate carrier-modulated carrier symbols, a frequency / transmit antenna interleaving unit (frequency / polarized wave interleaving unit) that interleaves the carrier symbols in the frequency domain and between transmit antennas to generate interleaved data for each transmit antenna, and an output processing unit that constructs an OFDM frame for the interleaved data for each transmit antenna and transmits an OFDM signal via the transmit antennas.

A foldable knife comprises a blade having an end pivotally connected to an end of a handle, and a spring having two ends connected to the handle and blade respectively, so that the spring can apply a torque to the blade to rotate the blade out of the handle. A blocking element is provided at an inner portion of the handle. A switch element pivotally connected to the inner portion of the handle has a first end extended out of the handle. When the blade is completely received in the handle, a second end of the switch element bears against the blade. When the user pushes the first end of the switch element, a positioning portion formed on the blocking element is disengaged from an engaging portion formed on the blade, so that the torque of the spring drives the blade to spring out of the handle.

Because wired connections make changing the seating configuration difficult, a wireless client device enables stable wireless transmission. The wireless client device wirelessly transmits to and receives data signals from an access point inside an aircraft. The wireless client device has a seat unit with a seat portion on which aircraft passengers sit, an antenna for sending and receiving the data signals, a signal processing arrangement operable to handle data signal receiving and transmitting processes, and a signal output arrangement operable to output processed reception signals. The antenna arrangement, signal processing arrangement, and signal output arrangement are disposed to the seat unit.

A slide-out electronic card connector includes a seat body and a slide cavity being defined between two opposite sides of the seat body. Multiple terminals are inlaid in the seat body. A cartridge snugly slidably disposed in the slide cavity of the seat body. An electronic card can be stably received in an electronic card receiving cavity of the cartridge and electrically connected with the terminals in the seat body when the cartridge with the electronic card is slid into the seat body. When the cartridge is slid into the seat body, a resilient latch arm is correspondingly latched in a fixing latch dent for preventing the cartridge from slipping out of the seat body. When a user outward draws the cartridge, the resilient latch arm is unlatched from the fixing latch dent, permitting the cartridge to be drawn out of the seat body and totally separated therefrom.

The invention relates to an internet of things intelligent socket and belongs to the technical field of sockets. The internet of things intelligent socket can realize remote monitoring, overload protection and electric energy monitoring of an electric loop for the socket as well as long-distance stable transmission of a communication signal, and comprises a power supply module, an MCU, a relay, anelectric energy statistical module, a jack panel, a communication module, a red and green indicating lamp and a microswitch; and the MCU is used for processing current and voltage information acquired by the electric energy statistical module, controlling a relay coil to turn on and off, controlling the output state of the red and green indicating lamp, accepting the action state of the microswitch, transmitting the local peripheral module state to a user operating terminal through the communication module and receiving and executing a control instruction of the operating terminal through thecommunication module. The internet of thins intelligent socket provided by the invention has the functions of the traditional socket, can monitor the working state of the socket external electric equipment and can perform alarm and outage on the abnormal state so as to realize electric energy saving and safety alarm.

A vehicle seat includes: a seat cushion; a base provided on a vehicle body; a seat lifter configured to adjust a height of the seat cushion by a rotational motion of a link connecting the seat cushion to the base; and a fixture of a seat belt, the fixture being attached to the link.

The invention relates to a method of achieving high-definition transmission of videos, and mainly solves the problems that in prior art, a video is poor in quality and real-time performance. The method comprises the following steps: providing a video high-definition system which comprises a video collecting compressing module (1), a transporting module (2), a decompressing and playing module (3) and an interface (4), carrying out transformat conversion to the collected videos, coding the transformat converted videos by adopting a video coding technique based on a graphics processing unit (GPU) and storing the converted videos, transporting the video data by adopting the protocol based on real time protocol (RTP) / real-time transport control protocol (RTCP), carrying out decoding to the video data by adopting video parallel decoding technology based on the GPU, and outputting a decoded video displaying technique scheme. The method of achieving the high-definition transmission of the videos solves the problem better, and can be used to achieve the high-definition and real-time transmission of the videos.

A directional antenna device for receiving a radio wave in a microwave band transmitted from a communication unit provided on a movable mobile body, by using an antenna unit having directivity and provided on a fixed body fixed to a predetermined position. The antenna unit includes: a plurality of directional antennas arranged with directivities in different directions; and reception selection unit for selecting one of the plurality of directional antennas arranged in the transmission direction in which the radio wave reaches the fixed body, thereby receiving the radio wave. Thus, it is possible to provide a directional antenna device capable of performing stable transmission and reception without being affected by the relative position between the mobile body and the fixed body.

A high frequency receiver capable of stably canceling interference by a transmission signal even if a transmission signal input from a TV antenna is changed. Phase shifter (212) for changing a phase of an interfering distributed transmission signal, detector (216) for detecting a level of a transmission signal included in a receive signal input via an antenna, and level regulator (213) for changing a level of the distributed transmission signal in accordance with this level are provided. A signal input via level regulator (213) and phase shifter (212) and a receive signal are synthesized to be input into mixer (206). Since a transmission signal can be cancelled even if a transmission signal input from an antenna is changed, a high frequency receiver can receive a signal stably when a transmission signal is changed.

There is provided a directional antenna device for receiving a radio wave of a microwave band transmitted from a communication unit arranged on a mobile body, by using an antenna unit having directivity arranged on a fixed body fixed to a predetermined position. The antenna unit includes: a plurality of directional antennas arranged with directivities in different directions; and a reception selection unit for selecting one of the directional antennas arranged in the transmission direction in which the radio wave reaches the fixed body, thereby receiving the radio wave. Thus, it is possible to provide a directional antenna device capable of performing stable transmission and reception without being affected by the relative position between the mobile body and the fixed body.