98 results about "Radio detection" patented technology

The present invention relates to receiving access signals from a plurality of terminals over a radio channel and in particular to determining a detection threshold level on the radio channel. A detection threshold level should balance the risk of missed detections to the risk of false detections. A problem in finding an equilibrium threshold is the radio environment, with noise and interference, change and then also the radio false detections or missed detections change. According to the present invention some access signals can be identified as being not assigned and therefore not being in use, and any detection of a non-used signal is identified as a false detection. By monitoring the ratio of false detections vs. correct detections the threshold level for detection is tuned into an equilibrium level, and that is adapted to the changing radio environments. In addition the detection threshold level for access signals detection threshold for data and/or control signalling may be adjusted in relation to the access signal threshold level.

Detecting position information related to a face, and more particularly to an eyeball in a face, using a detection and ranging system, such as a Radio Detection And Ranging (“RADAR”) system, or a Light Detection And Ranging (“LIDAR”) system. The position information may include a location of the eyeball, translational motion information related to the eyeball (e.g., displacement, velocity, acceleration, jerk, etc.), rotational motion information related to the eyeball (e.g., rotational displacement, rotational velocity, rotational acceleration, etc.) as the eyeball rotates within its socket.

Embodiments of the present invention can be used to enhance signals in a peer-to-peer radio system, such as a two-way radio system. In one embodiment, the invention includes receiving a communications signal on a channel from a remote radio at a radio using a plurality of antenna elements, such as an antenna array. The received communications signal includes a squelch code. The radio detects the squelch code, and enhances the received communications signal using the squelch code.

In one embodiment a method includes, collecting in-phase/quadrature (I/Q) data representing energy detected by a radio in a frequency band, performing a fast Fourier transform (FFT) on the I/Q data resulting in a stream of FFT blocks, identifying using the stream of FFT blocks a pulse in the frequency band, recording in a radio events record (RER) a plurality of radio events and corresponding timestamps that are indicative, respectively, of a type and time of individual state changes in the radio during the collecting step, and, for example, using at least two of the radio events to identify, in the time domain, a beginning time and end time of the pulse detected in the stream of FFT blocks.

A direct conversion radio frequency (RF) transceiver integrated circuit (IC) is provided. The IC includes a local oscillator block, a receiver block, and a transmitter block disposed on a single silicon-based integrated circuit. Each of such blocks are connected to a ground plane that includes a metal located adjacent to each of such blocks, air gaps located between each section of the metal adjacent to such blocks, each section of the metal being connected to the adjacent section of metal in the group plane at a location on the edge of the ground plan corresponding to a point substantially equidistant from the two sections of metal. A system and method is provided for implementing a direct conversion integrated circuit architecture. A clock distribution system is provided, as well as a method for radio detection and ranging (RADAR) using a Doppler RADAR transceiver system in the W-band. A method for noise isolation between blocks of an integrated circuit is also provided.

A RADAR system including a set of RADAR apparatuses is disclosed. Each apparatus includes a processor, a pulse unit in signal communication with the processor, a waveform signal generator in signal communication with the pulse unit, and a set of radar antennas in signal communication with the waveform signal generator. The waveform signal generator is capable of generating a waveform signal in response to pulses provided by the pulse unit. The set of antennas is capable of transmitting a burst of microwave energy in response to each waveform signal and to receive a plurality of reflected bursts associated with the transmitted bursts. An acquisition unit is configured to develop and amplify a finite window integral associated with each reflected burst, the acquisition unit in signal communication with the set of antennas and a pre-processor configured to digitize and store information relating to each finite window integral for subsequent processing.

A method of automatically activating and deactivating a service, comprising the following steps: a) establishing, from a first terminal, a short-range radio detection field for detecting the presence of a second terminal; b) deactivating the service if the second terminal is in the short-range radio detection field; or c) activating the service if the second terminal is not in the short-range radio detection field.

Various types of systems or technologies can be used to collect data in a 3D space. For example, LiDAR (light detection and ranging) and RADAR (radio detection and ranging) systems are commonly used to generate point cloud data for 3D space around vehicles, for such functions as localization, mapping, and tracking. This disclosure provides improvements for processing the point cloud data that has been collected. The processing improvements include using a three dimensional polar depth map to assist in performing nearest neighbor analysis on point cloud data for object detection, trajectory detection, freespace detection, obstacle detection, landmark detection, and providing other geometric space parameters.

The invention relates to the vehicle spraying equipment technology and discloses a surround non-contact wipe-free car washer. An infrared electronic opposite type detection probe for detecting the distance between a vehicle body and a liquid spray bracket is positioned at the middle of a top spray rod and the lower end of the liquid spray side rod. An infrared electronic radio detection probe for detecting the length of the vehicle body is positioned at the two ends of the liquid spray bracket or the lower end of two suspension brackets hanging downward the two ends of a cross beam. A water sprayer connecting with a low-pressure water pipe and a high-pressure water pipe and a washing solution sprayer connecting with a washing solution pipe are positioned on the liquid spray bracket respectively. The detection line of the water sprayer, the washing solution sprayer and the infrared electronic radio detection probe is transferred via a liquid switchover valve and a signal transferring device for enabling the liquid spray bracket to do the continuous rotation of more than 360 degree. The action of the liquid spray bracket, a water pump and the washing solution are controlled by a PLC (programmable logic controller). The invention has the advantages of the accurate positioning of spraying location, the clean washing, the continuous rotation of the liquid spray bracket, no touch on the vehicle body and being suitable for wide application on the automatic car washer with various specifications and types.

The invention relates to an unmanned aerial vehicle detection method and an unmanned aerial vehicle detection system. The unmanned aerial vehicle detection system comprises a radio detection device which is used for detecting a target unmanned aerial vehicle in a detection range through a radio detection method so as to obtain radio detection information of the target unmanned aerial vehicle; a photoelectric detection device which is used for detecting the target unmanned aerial vehicle in the detection range through a photoelectric detection method so as to obtain photoelectric detection information of the target unmanned aerial vehicle; an information processing apparatus which is electrically connected with the radio detection device and the photoelectric detection device, and is used for receiving the radio detection information of the target unmanned aerial vehicle and the photoelectric detection information of the target unmanned aerial vehicle, and obtaining the comprehensive information of the unmanned aerial vehicle according to the radio detection information and the photoelectric detection information. Through the dual-mode passive detection target unmanned aerial vehicle, the surrounding environment is not influenced.

A wireless ultrasonic diagnostic apparatus is composed of a first ultrasonic probe, a second ultrasonic probe, and an ultrasonic observation device each having wireless communication function. The first ultrasonic probe is used for ultrasonic diagnosis. The second ultrasonic probe, not being used for the ultrasonic diagnosis, is disposed in an area in which coverage of the first ultrasonic probe and coverage of the ultrasonic observation device overlap with each other. The second ultrasonic probe relays radio detection signals output from the first ultrasonic probe to the ultrasonic observation device.

The invention discloses a method for blindly recognizing convolution code coding parameter of tolerant error code, relating to the technology of intelligent communication, communication reconnaissance and information security in the communication field. The method comprising the following steps of: adopting a linear equation for forming two element field for the coding parameter to be recognized; then solving a fault-tolerant linear equation by conducting Walsh-Hadamard transform to an equations set to recognize the coding parameter of the convolution code, and realizing the blind recognition of the coding parameter of the convolution code only through communication content; and finally achieving the purpose of intelligent communication and communication reconnaissance. The method is characterized by simple algorithm, stable and steady performance, high accuracy and the like, and is especially applicable to the channel coding recognition algorithm in the fields of intelligent communication, communication reconnaissance, radiodetection, communication countermeasure, etc.

A wireless sensor device of low energy consumption operates over a prolonged period of time for providing a reliable sensor result. The wireless sensor device includes a sensor configured to sense a target object and provide a sensor signal of varying levels indicative of condition of the target object, a signal processing circuit configured to amplify the sensor signal and give an amplified electric analog signal, and a detection circuit configured to receive the amplified analog signal and provide a detection output when the electric analog signal goes beyond a predetermined detection threshold. Also included in the device is a radio transmitter which transmits a radio detection signal in response to the detection output. Further, the device includes a power supply configured to provide an electric power to the signal processing circuit and the radio transmitter; and a power generating element which converts an external energy into the electric power to be accumulated in the power supply. The controller is included to activate the radio transmitter only in response to the detection output, permitting the radio transmitter to generate the radio detection signal. Thus, the radio transmitter can be kept inactivated until receiving the detection output, thereby saving energy to prolong the operating life of the device.

The invention discloses an unmanned aerial vehicle prevention and control method. The method comprises the following steps of S1, carrying out the full-band scanning of an unmanned aerial vehicle signal; S2, discovering a target by using a radar detection device, and recognizing the target by using a photoelectric video image; S3, performing frequency writing interference, and starting navigation interference; S4, if full-band radio detection equipment cannot detect, discovering the unmanned aerial vehicle by using the radar detection equipment, and recognizing the target by using the photoelectric video image; and S5, starting a composite interception strategy. The invention further discloses an unmanned aerial vehicle prevention and control system. A cluster unmanned aerial vehicle prevention and control command subsystem comprises a radio detection and recognition module, a passive radar photoelectric guiding module, a radio interference steering module, an active radar photoelectric guiding module, and a composite interception strategy module. According to the Unmanned aerial vehicle prevention and control method and system, accurate detection identification and rapid command decision making are achieved for incoming cluster unmanned aerial vehicles, soft and hard killing measures are taken in an auxiliary mode, the cluster unmanned aerial vehicle interception disposal success rate and disposal efficiency are improved, and the method and the system can be widely applied to the field of unmanned aerial vehicle prevention and control.

The invention discloses a blind identification method for coding parameters of an extended Golay code of an error-tolerant code, and relates to the technology of intelligent communication, communication reconnaissance, and information security in the field of communications. By adopting the characteristics that the extended Golay code only has even code weight and an inner product of an encoding sequence and a check matrix is zero, the blind identification of the encoding parameters of the binary extended Golay code is realized through the communication contents only, and the aims of intelligent communication and communication reconnaissance are fulfilled. The blind identification method has the characteristics of simple algorithm, robustness of performance, high identification speed, high precision and the like, and is particularly suitable for channel encoding identification algorithm in the fields of intelligent communication, communication reconnaissance, radio detection, communication countermeasure, and the like.

Various types of systems or technologies can be used to collect data in a 3D space. For example, LiDAR (light detection and ranging) and RADAR (radio detection and ranging) systems are commonly used to generate point cloud data for 3D space around vehicles, for such functions as localization, mapping, and tracking. This disclosure provides improvements for processing the point cloud data that has been collected. The processing improvements include analyzing point cloud data using trajectory equations, depth maps, and texture maps. The processing improvements also include representing the point cloud data by a two dimensional depth map or a texture map and using the depth map or texture map to provide object motion, obstacle detection, freespace detection, and landmark detection for an area surrounding a vehicle.

The invention discloses a capsule material composite layer and an aerostat. The capsule material composite layer comprises a metamaterial layer used as a frequency selection surface. By providing the capsule material composite layer comprising the metamaterial layer as the frequency selection surface, and utilizing the characteristic that the probability of detecting the metamaterial layer by a radio detection device is extremely low, the capsule made of the capsule material composite layer has the radar stealth function.

A radio detection device includes two or more reception antennas, for detecting a detecting object by a mono-pulse method; the radio detection device including: a variable gain unit for discretely changing respective signal intensity of a difference signal and a sum signal of each reception signal received by the two or more reception antennas; an A/D conversion unit for performing A/D conversion process on the difference signal or the sum signal, the difference signal or the sum signal having the signal intensity changed by the variable gain unit; an angle calculating portion for calculating an angle by the mono-pulse method using the difference signal and the sum signal after the A/D conversion process by the A/D conversion unit; and a control unit for performing a control of individually switching a conversion magnification of the signal intensity by the variable gain unit with respect to the difference signal and the sum signal.