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 receiving module selects frequencies to be used for data request signals from all channels if there is no channel prohibited from being used, and if there are channels prohibited from being used, the receiving module selects frequencies to be used for data request signals from channels other than the channels prohibited from being used. In the case failed in acceptance of measured data from a sensor module, the receiving module sets communication channels failed in acceptance of measured data predetermined times to prohibited channels from being used. In this manner, when the receiving module transmits the data request signals to the sensor module, frequencies of channels having jamming radio waves and the like could not be selected by the receiving module, thereby enabling the receiving module to select the frequencies of high probability in communication reception.

An optical space communication reception circuit receives a signal in switched-over communication speed modes and under settings corresponding to the communication speed modes. Receiver sensitivity in the respective communication speed modes is set in advance such that maximum communicable distances in the communication speed modes are substantially equal. By this, it becomes possible, for example, in optical space transmission such as infrared communication and the like to enhance a false operation prevention characteristic against disturbance noise, without decreasing maximum communicable distances.

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.

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 at most quadratically with the number of transmitted sub-streams and independent of the constellation order.

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 discloses an integrated OFDM radar communication waveform design method based on frequency domain zero setting modulation. A frequency domain zero setting multi-waveform optimization design method is utilized to realize communication data transmission, and radar performance of signals is further optimized. For a radar emission portion, in combination with a signal autocorrelation peak value sidelobe level and an envelope fluctuating factor in radar waveform design, a subcarrier reservation method is applied to design and construct a convex optimization problem, an SDP method based on randomization is further employed to solve a problem; for a radar reception portion, the autocorrelation characteristic of a filtering verification signal is matched, certain signal processing is further carried out; for a communication reception portion, a method based on minimum sub-band energy is employed to demodulate the signal, and demodulation binary communication data is lastly generated. The method is advantaged in that not only can the signal frequency spectrum compatibility characteristic be considered, but also a multi-waveform optimization design problem is further utilized to realize communication data transmission and waveform radar characteristic optimization.

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.

It is possible to realize an ideal software reception device which can demodulate a higher-order modulation signal without losing vector information even if a carrier wave is sampled with a frequency lower than the carrier wave. A sampling frequency is set so that a phase relationship of the sampling point of an alias signal generated by sampling of a carrier with a sampling frequency lower than the carrier wave coincides with a phase relationship of the sampling point of the carrier wave. That is, the sampling frequency is set so that the carrier wave frequency “fc” and the sampling frequency “fs” satisfy the relationship fs=4fc / (4k+1), wherein k is a positive integer. Thus, it is possible to perform undersampling of the carrier wave while holding the vector information and demodulate a higher-order modulation such as QPSK and 64 QAM.

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 purpose of the present invention is to provide a sensor share control device and method for dynamically matching the policies of a sensor user and a sensor provider. In order to achieve this purpose, as a first embodiment, provided is a sensor share control device characterized by the following: a means in which a use request processing unit receives sensor use request information from a sensor user terminal; a means in which the use request processing unit records a use request to a requested policy, and the recording of the requested policy is communicated to a sensor search unit; a means in which a use permission processing unit receives sensor use permission information from a sensor provider terminal; a means in which the use permission processing unit records use permission to a permission policy, and the recording of the permission policy is communicated to a sensor search unit; a means in which the sensor search unit searches for a permission policy matching the requested policy in response to communication reception of the recording of the requested policy or the permission policy; a means in which a list of sensors included in the matched permission policy is created and sent to sensor user terminals that were recorded to the requested policy; and the means for searching in which searching is performed again dynamically if the requested policy or the permission policy are changed.

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 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.

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.

The invention provides a feedback method and a feedback device for downlink subframes of a base station and a user terminal. The base station downlink subframe feedback method comprises the steps of: determining a downlink subframe feedback rule which comprises UL-DL configuration and subframe offset according to actual use condition of uplink and downlink subframes, and informing the user terminal; and carrying out communication reception according to the downlink subframe feedback rule. The feedback method and the feedback device for the downlink subframes of the base station and the user terminal can select uplink subframes bearing HARQ-ACK flexibly on the bases of ensuring that the HARQ-ACK of all downlink subframes can be fed back normally. The feedback method provided by the embodiment of the invention maintains the backward compatibility of an FDD / TDD LTE system, can effectively balance HARQ-ACK feedback overhead of each uplink subframe, is suitable for the scene that the uplink subframes cannot operate normally due to causes such as interference, and can help technologies such as carrier aggregation, double connection and D2D to realize coexistence usage.

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.

The invention discloses an infusion monitoring and alarm system. The infusion monitoring and alarm system comprises a first housing, scales, a first metal sheet, a regulation rod, a second metal sheet, a pin roll, a spring, a weight display list, a hook, a cable, a second housing, a photoelectric alarm lamp, a buzzer, a power switch, a communication element, a breast plate, a communication reception element, a miniature buzzer and a miniature photoelectric alarm lamp. The infusion monitoring and alarm system has following beneficial effects: a user does not need to always see the remaining dose during infusion treatment so that mental burdens of a patient and a nurse can be reduced; the patient can take a rest in order to help recovery; the working intensity of a monitor can be reduced in order to attend the patient; attendance cost is lowered; the height of the first metal sheet can be regulated by the regulation rod; an infusion bag is suspended by the hook; when the infusion bag is used up, the first metal sheet is in touch with the second metal sheet so that a circuit is electrified and an alarm is given; and the communication element can send data out.

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 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.

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.

A power line carrier communication reception circuit which can precisely receive a signal to be superimposed at such a signal level that leakage of an electromagnetic wave does not cause a problem while employing a simplified configuration is provided.The power line carrier communication reception circuit may include an amplifier which is connected to a power line and amplifies a received signal to be superimposed on the power line; two capacitors which are connected in series between both power sources of the amplifier; and a clipper circuit which connects connection points of these capacitors to the power line and limits the received signal in a predetermined range of a reference voltage between the capacitors, and in which the amplifier compares the signal limited by the clipper circuit and the reference voltage and amplifies the signal.