59 results about "Radiolocation" patented technology

Determining the location of a radio tag or client station of a wireless network, and the location of coverage holes by receiving from a plurality of wireless stations of the wireless network path loss information of the path loss of one or more location frames received at the respective wireless stations. The location frames transmitted by the radio tag or client station having a pre-defined frame structure. The radio tags and client stations use a common infrastructure for transmitting a location frame configured for radiolocation by path loss measurement. The common infrastructure includes a pre-defined protocol common for both radio tags and client stations for transmitting information for reception by the plurality of stations of the wireless network for radiolocation. The pre-defined protocol includes using the location frame having the pre-defined frame structure.

A system and method are provided for improving efficiency of operation and convenience of access to a fleet of taxis, or other service vehicles, requiring rapid, on-demand dispatch to customer-determined locations. Automatic speech recognition (ASR) and/or radiolocation technology are used to automate the entry of the customer pickup location, and optionally the dropoff location and other relevant information as well. A customer speaks the pickup location into a cellular telephone which then digitizes and transmits it as a data communication to an ASR system. The ASR system decodes the digitized utterance into a pickup location which is passed to a vehicle matching and dispatch system. The vehicle matching and dispatch system matches a taxi and dispatches it to the pickup location. In one embodiment, the identified pickup location is transmitted to the customer's cellular telephone for confirmation or correction, before dispatch of the requested taxi.

A mobile emergency response apparatus providing water collection, handling, treatment, and storage capabilities, as well as serving as mobile telecommunication system. The apparatus comprises a raw water filtration system, a sodium ion exchange system, a storage system with a plurality of tanks, a reverse osmosis system, and heating and distributions systems. The apparatus also comprises a mobile electrical power system. Optionally, the apparatus includes a desalination system, a disinfection system, a rainwater collection system, a fluid containment and recovery system, and an auxiliary fluid distribution system. The disinfection system may include a chlorination, ultraviolet light, or ozone disinfection system, and may further include a distillation system that may be conventionally powered or solar powered. Water may be distributed through a plurality of auxiliary devices. The telecommunication system includes both satellite and terrestrial transmission and receiving capability, and location identification devices such as a global positioning system and a radiolocation system.

In a method to support geo-location emergency services in a wireless network, a request message is transmitted from a source base station of one vendor to a target base station of another vendor. For example, the request message might be sent subsequent to a wireless unit initiating an emergency services communication, where it is desired to determine the location of the wireless unit by radiolocation, or otherwise at the network level. Upon receiving the request message, the target base station transmits a report message to the source base station, which includes a one-way transmission delay (or other propagation delay information) of the wireless unit as measured at the target base station. Communication protocols in the network are configured so that there are no automatic transmissions of propagation delay information. Instead, base stations transmit propagation delay information only upon the receipt of request messages requesting the information.

A procedure for determining the probability of finding a parking place within a certain period of time on a pre-set stretch of road of an area with a multiplicity of stretches of road. With this procedure, motion profiles are detected and statistically evaluated of users of radiolocation-aided, especially satellite-aided, navigation aids in the area. For each user

• • a) A “parking place found” event is determined;
  • b) The stretch of road in which the “parking place found” event occurred is detected;
  • c) The travel time is detected which the user expended in each of the stretches of the road until the “parking place found” event occurred.

From the data thus acquired for a multiplicity of users, a probability is determined of finding a parking place within the set time span on the stretch of the road.

The invention relates to the field of radiolocation direction-finding systems, and aims to provide a single-channel radiolocation direction-finding system and a direction-finding method thereof to reduce cost and improve direction-finding accuracy. The single-channel radiolocation direction-finding system is characterized by comprising a direction-finding antenna array, a single-channel receiver with the functions of filtration, amplification, frequency conversion and amplitude limitation, and a direction-finding microprocessor for A/D sampling and digital signal processing, wherein the direction-finding antenna array mainly comprises N identical antenna units which are arranged on the circumference of a concentric circle, wherein N is greater than or equal to 3; and each antenna unit is connected with the single-channel receiver through a radio-frequency electronic switch. The invention utilizes a single-channel radio direction-finding technology combined with a phase interference method and a Doppler direction-finding principle, and only needs one single-channel receiver with the functions of filtration, amplification, frequency conversion and amplitude limitation, thereby reducing the complexity and the cost of equipment, improving reliability, reducing the calculated amount of back-end signal processing, and improving direction-finding accuracy.

The invention discloses an electric vehicle wireless charging transmitting and receiving automatic alignment system. The electric vehicle wireless charging transmitting and receiving automatic alignment system comprises a wireless receiving device and a wireless transmitting device, a communication connection being established between the wireless receiving device and the wireless transmitting device. The automatic alignment system further comprises a radio positioning device and a motor positioning driving device; the motor positioning driving device is arranged at the bottom of an electric vehicle; the wireless receiving device is arranged on the motor positioning driving device, and can move leftwards and rightwards under the driving of the motor positioning driving device; a communication connection is established between the radio positioning device and the motor positioning driving device; the radio positioning device includes a radio range-measuring circuit and a radio answering circuit; a communication connection is established between the radio range-measuring circuit and the radio answering circuit; after the radio range-measuring circuit transmits range-measuring radio signals, the radio answering circuit transmits response signals; the radio range-measuring circuit calculates position difference according to time length for receiving the response signals; and therefore, the motor positioning driving device can be controlled to move according to the position difference.

The invention relates to a positioning method for correcting and revising a ground mobile communication network by using a map elevation, which relates to positioning technology, and uses an electronic map marked with horizon and building elevation as the elevation constraint, and the high precision of the electronic map is decimeter or centimeter level. When using the ground mobile communication network or broadcasting network to measure the pseudo-range positioning, due to the non-line-of-sight error in the pseudo-range measurement, the current positioning accuracy is low. To improve the positioning accuracy of terrestrial mobile networks and broadcasting networks, the influence of non-line-of-sight errors must be corrected. This method utilizes the initial positioning solution and the elevation constraint to verify the accuracy of the pseudo-range measurement, judges whether the measured pseudo-range has non-line-of-sight transmission error, and corrects the pseudo-range error to improve the positioning accuracy of the mobile station. The method of the invention is simple and easy, can distinguish, estimate and eliminate non-line-of-sight propagation errors, and improves the positioning accuracy of the mobile phone to the order of meters, which has practical significance. It is suitable for radiolocation of terrestrial mobile communication network, radiolocation of terrestrial broadcasting network and radiolocation of satellite transmission network.

The invention relates to the field of radiolocation and can be used in on-board radar stations for determining the coordinates and speed of moving and stationary objects with a high accuracy. The technical result which can be achieved is an increase in the accuracy of determining the coordinates and velocity of objects and targets having a low level of effective reflective area. The essence of the method consists in assessing the rate of change in frequency of the additional linear frequency modulation (LFM) of a signal reflected from an object and dependent on the movement of the latter, with subsequent calculation of the distance to the object taking into account the value of an initial frequency of the received LFM signal. Said technical result is achieved by the fact that the distance to the object is determined on the basis of a change in the frequency of a probing LFM signal, taking into account Doppler corrections. The method is realized with the aid of a device comprising the following, interconnected in a defined manner: M channels for emitting a continuous LFM signal at various frequencies and polarizations, N channels for receiving echo signals, an N-channel parameter assessment device, an N-channel device for generating supporting functions, a received-signal multiplier with supporting functions, a rapid Fourier transformation unit, a device for searching for the maximum of a mutual correlation function, and a sensor of the intrinsic speed of a radar-station carrier.

Systems, apparatus and methods for selecting a base station or a set of base stations for RTT measurements, or other interactive radio localization technique, to determine a position fix of a device are presented. The method imposes a processing load on only inactive or less active base stations. Busy or busier base stations are not used in the interactive radio localization technique. By imposing a processing load on only less active base stations, transmitting devices may be under loaded and encounter a more uniform processing delay, and thus provide a more accurate measurement resulting in a more accurate position fix.

A process that records, transmits and analyzes moment-to-moment data of objects of interest at an event for the production of a digital representation of the event. This representation is the result of a short-range radiolocation system used for tracking objects. Computing systems re-create timed sequences of event and broadcasts the digital representation to both local interactive PDA's and to internet virtual casts. Four or more receivers are situated so as to cover the entire area of the event. Transmitter tags are placed on all objects (e.g., players, ball etc). The processor receives the data and compiles it for digital recreation and transmission to the aforementioned destination devices.

The invention provides a relative position measurement method through radio positioning and a measurement device thereof. The measurement device comprises a transmitting unit, receiving units and a signal processing unit. Receiving signals of each receiving unit are extracted by recording the position of each receiving unit, the distance between all the receiving units and the distance between each receiving unit and the transmitting unit under the initial state so as to solve phase information. The position of the transmitting unit relative to a platform can be solved according to the space quadrilateral geometric relation of the receiving units and the transmitting unit. The phase ambiguity problem is solved, and measurement of the direction and the relative position of moving points can be realized through transmitting signals of single frequency so that the system is easy to realize, high in reliability and low in influence of external factors and can control the moving distance and the position of the moving nodes in real time and can be widely applied to the system requiring long-term monitoring and early warning.

The present invention teaches a frequency-scalable high-gain dual-polarization radio beam application platform for private, public, government, or military radio applications such as RFID (radio frequency identification), aerial and robotic inventory scanning, radio communications, telemetry, telecommand, aeronautical radionavigation, radiolocation, earth exploration, space research for terrestrial, air-to-ground, space-to-earth, or space-to-space uses.

The invention relates to a joint estimation method for the angle of an array antenna and the number of signal sources in a complex noise environment, and belongs to the technical field of radio positioning. The joint estimation method comprises the steps of 1) solving a cycle correlation entropy matrix V<alpha><y>(tau) of array signals under a condition that the cycle frequency is known; 2) building a cycle correlation entropy array linear prediction model V=[Phi]A which is applicable to broadband signals and narrow-band signals; 3) estimating the number K of interested signal sources and an error variance [sigma]<2>; 4) estimating a flow pattern matrix of the array model; and 5) performing DOA estimation by using spectrum peak searching. According to the invention, a cycle correlation entropy theory is organically applied to array signal processing, correlation characteristics of the cycle correlation entropy are innovatively proposed, and the array linear prediction model is built based on the characteristics. The algorithm is put forward according to actual requirements, and has the characteristics of high anti-noise performance, low computation complexity, small number of required snapshots, high angular resolution and the like.

A method is provided for estimating the parameters of useful signal and multi-path signals originating from a radiolocation signal emitted by a satellite, a location device comprising at least two sensors able to receive the signal. The method comprises the steps of: correlating the signal received by the sensors with a local code by means of correlators, constructing, for each sensor, a sampled intercorrelation function intercorrelating the signal received with the local code, determining a spatio-temporal intercorrelation function on the basis of the concatenation of the intercorrelation functions obtained in the previous step for each sensor, estimating parameters representative of the useful signal and of the multi-path signals by applying a maximum likelihood algorithm, the representative parameters including at least one complex amplitude estimated independently for each sensor.

The invention relates to the area of active radiolocation and can be used in the design and development of digital broadband radar systems for river and marine navigation. The engineering task of this invention is aimed at simplifying the factory adjustment, thereby reducing the cost of the device in serial production. In addition, the engineering task also includes increasing the maximum permitted power of the emitted signal, which will not hinder the operation of the radar station due to overloading the receiver channel, as well as expanding the dynamic range of amplitudes of reflected signals, while retaining radar performance. The device contains a CPU with two ports, a display device, an angular position sensor, a master controller with five ports, a digital signal shaper, a timer signal generator, a beat signal processing unit, a correction filter, an m-channel radio signal adder, an m-channel radio signal splitter, mm transceiver modules containing a receiving and a transmission channel, and a two-channel signal splitter.

The invention relates to a radio-location system for determining the location of a transportation vehicle (101, 201) for containers (105, 106) within a working area, having a radio-location system (107) comprising a plurality of active, terrestrially arranged location markers (107c) which transmit position data, antennas (107a, 107b) which receive the position data, receivers (107d) which processthe received position data and having at least one transportation vehicle which is embodied as a gantry forklift truck (101) with at least one of the antennas (107a, 107b) with a receiver (107d) and anavigation computer (108) which converts the position data into driving instructions for the transportation vehicle. In order to provide an improved system it is proposed that at least two antennas (107a, 107b) should be arranged on the transportation vehicle (101, 201), that the at least two antennas (107a, 107b) should be spaced apart from one another, and that the navigation computer (108) should determine, in addition to the position of the transportation vehicle (101, 201), also the orientation of the transportation vehicle (101, 201) from the position data of the at least two antennas (107a, 107b).