83 results about "Communication reception" patented technology

The invention relates generally to a method and an apparatus for synchronizing a digital transmission using beacon packets, and in particular, by using beacon packets utilized in communication between a wireless access point and a wireless station in accordance with operating in accordance with the Institute of Electrical & Electronics Engineers' IEEE standard 802.11. A communication device comprises a means for creating a plurality of logical access points; a means for downloading a SSID into a mobile terminal in accordance with a user's of communication reception; and a means to permit the mobile terminal to switch from one logical access point to second logical access point depending on the current state of the logical access point and the user's choice.

The invention relates to a laser-based UAV recovery guidance system comprising an onboard end and a ground end. The ground end includes PAT (Pointing, Acquisition, Tracking) control unit consisting ofa two-axis stable tracking turntable, a two-dimensional galvanometer, a range-finding laser emitting module, a range-finding laser receiving module, a guidance/communication laser emitting unit, a CCD camera, and an I/O interface, and a master control computer with an image processing and control function. The PAT control unit points to, acquires and tracks a UAV target. The onboard end includesa cooperative target formed by an angle reflector/indicator and a photoelectric detector. The angle reflector/indicator is configured to feed back a signal to the ground end. The photoelectric detector operates in a simplex mode for laser communication reception. The laser-based UAV recovery guidance system can reliably upload information, such as recovery guidance position, to a UAV without resort to radio communication, and has capabilities of position measurement and communication synchronous transmission, and can achieve autonomous and precise UAV recovery under the condition of satelliteand radio communication denial.

A Multi Input Multi Output (MIMO) Wireless Communication Reception Method and Apparatus are proposed whereby in a 2-way wireless communication system with scattering propagation channels, where several data sub-streams are simultaneously transmitted from a transmitting side to a receiving side, and where no channel information is necessarily available at the transmitting side, excellent Symbol Error Rate performance is a achieved, in some cases quasi-optimal, at a complexity scaling almost quadratically with the number of transmitted sub-streams and independent of the constellation order.

The invention discloses a method for switching visible light wireless communication reception of moving vehicles. The method comprises the steps that when a signal overlapping coverage area exists between adjacent sending ends, a message source with strong signal switching power is selected to be communicated with the signal overlapping coverage area; when a signal overlapping coverage area does not exist between the adjacent sending ends, the uncovered distance between the adjacent sending ends is calculated; time for entering the next sending end coverage range is calculated; through calculation of the data size in the time period, a buffering space of the data size is reserved in a terminal, and therefore network disconnection is not instantly displayed during the time period. The method is applied to communication switching of the vehicles and road lamps, and communication between the vehicles and the road lamps is successfully guaranteed.

A synchronous motor including therein a three-phase inverter and position sensors, having a unit for calculating a digital input current value from the analog output of an input current detection circuit that detects the input current flowing into the DC input terminal of the three-phase inverter, and a digital feedback speed control unit for adjusting the amplitudes and frequency of the AC voltages outputted from the three-phase inverter in such a manner that the motor speed calculated by a motor speed calculation unit 41 on the basis of the outputs of the position sensors approaches a speed command value received by a communication reception unit from outside the synchronous motor. The synchronous motor further includes therein a communication transmission unit for transmitting the input current value and the motor speed to outside the synchronous motor.

The invention provides a long-distance laser atmosphere communication receiving device with the fast alignment function and a communication method. The device comprises a laser optical receiving assembly, a laser communicating photoelectric detector, a laser communicating receiving assembly, a laser alignment photoelectric detector assembly, a light spot alignment signal processing assembly, a motor control system and a servo system. A four-prism with a small hole in the center is applied, and the device has the advantages that a light path shared by alignment and laser communication reception is achieved, and the alignment precision is improved; the two functions of alignment and communication reception are achieved by applying one optical system, two original discrete systems are fused into one system, the flexibility of the system is improved, and the size and the weight of the system are reduced. In addition, a compensating lens can move front and back to make the image plane position move, the size of the image plane of incident light is changed, and the alignment function is achieved when the size of the image plane is large; atmosphere laser communicating is carried out when the size of the image plane is small, and different light beams can be switched between alignment and laser information reception effectively.

According to an aspect of the present invention, there is provided an image-projectable mobile information device including: a wireless communication unit that wirelessly communicates through a wireless channel; a projection unit that performs an image projection on a projection face; a communication reception notification method selection unit that selects a communication reception notification method that is referred when a communication is received though the wireless channel, the communication reception notification method including a setting of whether or not a vibration is performed; and a communication reception notification unit that notifies a receiving of communication by displaying a communication reception notification picture indicating the receiving of communication on the projection face by the projection unit without performing the vibration even when the communication reception notification method is set to perform the vibration, if the communication is received during the image projection.

Slot antennas built into metallic body panels utilize the vehicle body itself as an antenna radiator. Building the slot antennas directly into the metallic body panels converts the vehicle body from functioning as an RF shield into an RF antenna, which significantly improves mobile communication reception for a wide range of RF communication devices. Different types of slot antennas may be included for different communication channels utilized by different types of devices. Multi-band slot antennas are configured to receive multiple bands within a larger frequency channel. Dual-polarity antennas are configured to receive signals propagating in a dual-polarity mode. Multiple slot components may be configured as multi-band, dual-polarity antennas. Each slot antenna may be passive (without an RF pickup) or active with an RF pickup and coaxial cable connecting the antenna to an electronic device, such as receiver or amplifier located inside or otherwise interconnected with the vehicle.

The invention provides a hand-held double-mode wireless laser communication optical transceiver aiming reception apparatus, belonging to the wireless laser communication technology field. A present hand-held wireless laser communication device employs a single mode aiming receiving apparatus, an error is large, and contradiction of focal length and field of view exists. According to the invention, each of left and right lens barrels is provided with a set of aiming receiving apparatuses, an aiming part and a receiving part in each set of aiming receiving apparatuses share a same telescope object lens and are connected through a semitransparent mirror. In one set of aiming receiving apparatuses, a coarse sighting aiming part and a digital communication reception part share a same coarse sighting telescope object lens. A coarse sighting semitransparent mirror reflects digital communication light, backlight penetrates, magnification of the coarse sighting aiming part is 2 to 7 times, and an angle of visual field is 6 to 10 degrees. In the other set of aiming receiving apparatus, a fine sighting aiming part and an analog communication receiving part share a fine sighting telescope object lens, the fine sighting telescope object lens reflects most analog communication light, other analog communication light penetrates and is taken as beacon light, magnification of the fine sighting aiming part is 10 to 15 times, and an angle of visual field is 1 to 5 degrees.

The invention discloses a spectral ratio self-adaption control spatial light 90 degrees mixer, belongs to the technical field of wireless communication, and aims to solve the problems that the fixation of the existing spatial light 90 degrees mixer spectral ratio causes that the communication reception sensitivity is low, coherent communication flexibility is poor and the like. The mixer comprises a first 1/4 wave plate, a rotatable 1/2 wave plate, a Wollaston prism, a collimator, a second 1/4 wave plate, a first mirror, a second mirror, a first 1/2 wave plate, a second 1/2 wave plate, a first polarization beam prism, a third 1/2 wave plate, a fourth 1/2 wave plate, a second polarization beam prism, a first convergence lens, a second convergence lens, a third convergence lens, a fourth convergence lens, a first balanced detector, a second balanced detector, a multiplier, a communication signal processing module, an optical phase lock loop, an intrinsic light source, a driver and a controller. The spectral ratio self-adaption control spatial light 90 degrees mixer has the advantages of improving the communication sensitivity; reducing the bit error rate; increasing the phase lock probability, and reducing the phase lock time.

The invention discloses a communication method and device with a plurality of communication modes coexisting, and relates to the field of an optical distribution network. The method comprises the following steps: configuring corresponding communication tasks for each data communication module in an RTOS, and enabling all communication tasks to form a communication task queue; when communication interrupt signals of the data communication modules are judged to generate, developing an internal storage region and defining the internal storage region to be a circulation queue; judging the circulation queue as a under-filled queue for receiving communication reception data; storing the communication reception data to a communication data storage unit; and reading communication processing data of a communication data reading unit, and processing and sending the communication processing data through corresponding communication interfaces. According to the communication method and device, work efficiency is high, error rate is low, not only the work efficiency of the CPU is improved, but also data transmission performance is reliable and stable, and the communication method and device are convenient for users to use.

A method and apparatus for reducing an amount of bits of data at at least two stages of data transfer in a communications reception data path between a rake receiver and a channel decoder.

A tubular resin member constituting the frame of a feed horn is divided into an inner side resin member located at an inner circumferential plane side and an outer side resin member located at an outer circumferential plane side. The inner side resin member is formed of a resin material that allows metal plating. Metal plating is applied on the inner circumferential plane of the inner side resin member to form a metal plate layer corresponding to a waveguide plane. The outer side resin member is formed of a resin material containing a coating composition to improve the aesthetic appearance. Accordingly, a feed horn of a satellite communication reception converter that can be fabricated readily and economically can be provided.

The method involves detecting a predetermined event (20) relative to a terminal, where the event corresponds to a location of the terminal. Value of priority parameter of the terminal is sent toward a telecommunication network management device in case of positive detection of the event, where the value of priority parameter is assigned based on the predetermined event. The terminal near the management device is de-registered, and initial value of the parameter is stored, where the value of the parameter is reassigned to the stored initial value at end of the event. Independent claims are also included for the following: a device for dynamic management of receiving priority of communication of terminal with respect to another terminal a computer program having a set of instructions to perform a method for dynamic management of receiving priority of communication of a terminal with respect to another terminal.

There is provided a communication apparatus compliant with ultra wide band communication systems for improving resistance to interfering waves in combination with DS-SS (direct sequence spread spectrum). There is provided a training section based on short code spread with the same pattern repeated for each symbol length. Actual communication itself is preceded by coherent channel measurement of a transmission channel by using the training section to specify a length of the short code to be a measurement period and using N cycles of a carrier as a time resolution for measurement. A chip timing is controlled at the time resolution for measurement. At all points given by a time resolution for a measurement period, a measured value is obtained by using the short code to despread A/D-converted values from an input signal based on the chip timing.

A small-sized switch apparatus for switching between signal paths of at least first, second and third frequency bands is capable of handling high-powered high-frequency signals with a relatively low control voltage and is useful in a mobile terminal apparatus. A first signal terminal of a diplexer is connected to an antenna terminal, and a second signal terminal is connected to a high-frequency switch via a filter. A third signal terminal of the diplexer is connected to a high-frequency switch via a second filter. The high-frequency switch has PIN diodes as switching devices, and performs switching between a global system for mobile communications transmission signal and a global system for mobile communications reception signal. The high-frequency switch has three sets of serially connected multi-staged FETs as switching devices, and performs switching between wide-band code division multiple access transmission/reception signals, a digital cellular system transmission signal and a digital cellular system reception signal.