132 results about "Indoor antenna" patented technology

A digital indoor antenna device having a casing, a pivotal seat, a circular antenna having two ends and a PCB in the casing. The pivotal seat attached to the casing has two mounting holes respectively in which the two ends of circular antenna are mounted. The circular antenna rotates on the casing to adjust the horizontal receiving angle. Therefore, the circular antenna device can receive larger intensity of horizontal polarized signals. In addition, the pivotal seat can be pivotally connected to the casing, so the circular antenna can rotate horizontally on the casing to search for different channel signals.

The invention discloses an indoor antenna sensor network positioning method based on received signal strength indication. The method includes the steps of firstly, extracting indoor radiofrequency signal attenuation parameters; secondly, acquiring a received signal strength sample; thirdly, constructing confidence interval of a measuring distance by bootstrapping; fourthly, calculating a set of feasible solutions to estimated coordinates of unknown nodes in a set-membership estimation architecture; and fifthly, subjecting the set of feasible solutions to interval analysis to calculate node coordinates. The distance confidence interval is constructed by bootstrapping during distance estimation, so that positioning precision and robustness are improved and node energy consumption is reduced. During positioning, the set of feasible solutions to the node coordinates is subjected to interval analysis by set-membership estimation, and the estimated coordinates of the unknown nodes are calculated.

The invention relates to an automatic antenna feed fault detection system for a distributed antenna system. The automatic antenna feed fault detection system comprises a far-end antenna feed system alarm information collection device, an alarm information forwarding device and a network management center, wherein the far-end antenna feed system alarm information collection device comprises a far-end signal emission unit, a multifrequency combiner and an inner antenna additionally attached with inactive passive electronic labels. RUs read serial numbers of the electronic labels attached onto the antenna at regular time, each RU is in charge of collecting and monitoring fault data belonging to antenna feed systems, and all the RUs send the collected fault data and topological structure data belonging to antenna feed sub-systems to a monitoring center. The alarm information forwarding device comprises a near-end signal access unit and an expanding unit. The network management center comprises an alarm information receiving unit and an alarm display unit. The automatic antenna feed fault detection system for the distributed antenna system has the advantages of providing an automatic antenna feed fault detection scheme, reducing cost of labor and material resources, improving detection efficiency, finding problems timely and shortening fault clearing time.

The invention provides a method and a system for laying of indoor antennas. The method includes confirming an initial value of antenna quantity; obtaining the optimal laying position point scheme of the antennas of current antenna quantity by utilizing the multi-target evolutionary algorithms; and regulating the antennal quantity, obtaining the optimal laying position point scheme of the antennas of different antenna quantity, finding the optimal laying position point scheme having minimum antennal quantity, and obtaining the finial laying scheme of the indoor antennas. The method and the system can reduce achieving complexity of the laying of the indoor antennas, improves a covering effect, and reduces equipment cost.

The invention provides a method and a device for quickly positioning a fault of an indoor antenna distribution system. The method comprises the following steps: acquiring a coefficient of correlation between the wireless network index and the indoor antenna distribution system fault at the same time; acquiring an index set of the indoor antenna distribution system fault according to the acquired coefficient of correlation; acquiring the threshold values of five grades of color scales corresponding to the indoor antenna distribution system fault according to a box-and-whisker plot index threshold determining method; and determining the chromatograph of the indoor antenna distribution system fault according to the determined index set and the threshold values. By adopting the scheme, the accuracy rate of indoor antenna distribution system fault positioning is high, and the work efficiency is high.

The invention provides an indoor coverage system. The system comprises a baseband backup unit (BBU), a radio remote unit (RRU), a proximal control unit, an expansion unit, a remote access unit, a power divider, a coupler, a feeder cable, a connector and an antenna, wherein the BBU is connected with the RRU through an optical fiber; the RRU is connected with the proximal control unit through an optical fiber; the proximal control unit is connected with the extension unit through an optical cable; the expansion unit is connected with the remote access unit through an optoelectronic composite cable; output ports of the power divider and the coupler are connected with the feeder cable; the feeder cable is laid indoors and outdoors; an indoor antenna is fixed to the feeder cable and close to anindoor user; and an outdoor antenna is fixed to a roof and outdoor wall. Thus, a wireless network forms best coverage indoors; an indoor user can absorb more traffics; and the utilization rate of wireless network resources is increased.

A wide band indoor antenna includes a low band section with four modified spiral (MSE) elements, a high band section with a bent folded monopole (BFM) radiator mounted on a ground plane and a feeding plate for feeding the low band section and the high band section via a diplexer. The BFM radiator mounted on the ground plane can serve independently as a high frequency monopole antenna

A television receiving apparatus includes a tuner having an input port for image-representative signals, an input port for an external antenna, and an internal or associated external indoor antenna array including at least two electronically integrated antenna-WLNA elements. A processor includes a plurality of RF switches and at least one hybrid, for selectively generating a plurality of signals including sums and differences of signals from said elements. The sums and differences are compared with each other and with the external antenna signal to select the best signal, and that selected best signal is coupled to the input port of the tuner.

The invention discloses a satellite television ground receiving indoor antenna for automatically searching satellites, which comprises an antenna, an antenna driving system, an antenna driving control system circuit board, a tuner and a base. The antenna is connected with the antenna driving system which is controlled by the antenna driving control system circuit board; and the tuner is fixed on the antenna. By comparing the intensities of receiving signals, an antenna driving control system controls the rotation of the antenna driving system so as to drive the antenna to rotate for automatically searching satellites; therefore, if the position of the antenna is moved, the antenna can quickly find the optimal singles at the new position through rotation (in dozens of seconds) and transmits the signals to a receiver; and the whole device can be placed indoors, and has the advantages of compact overall structure, small floor area, convenient use and quick and convenient installation and adjustment.

The invention discloses a non-key entering and one-button starting system for a crane and a control method. The non-key entering and one-button starting system for the crane comprises a PEPS controller, a BCM controller, a one-button starting assembly, an alarming unit, an indoor antenna and an intelligent key. The one-button starting assembly is further connected with an engine ECU. In conclusion, the non-key entering and one-button starting system for the crane is better in safety and obvious in effect, a driver completely does not need to use a key to open a door lock when entering and leaving a cab, and does not need to use the key to rotate an ignition lock cylinder in the starting and shutting-down process of the engine, operation is easy, and the driving and riding comfort is obviously improved. In addition, in the running process of the crane, the risk that knees of the driver are crashed with a mechanical key is completely avoided. What's more, through bi-directional communication between a low frequency and a high frequency, complex double-way identity authentication between the wheel crane and the intelligent key can be completed, and the safety property is obviously improved.

The embodiment of the invention relates to an indoor dual-polarized omnidirectional antenna. The antenna comprises a metal baffle plate, a vertical polarized antenna of which an axis is vertical to the metal baffle plate and which is fixed on the metal baffle plate, and a horizontal polarized antenna fixed above the vertical polarized antenna. By the indoor dual-polarized omnidirectional antenna disclosed by the embodiment of the invention, due to the special structure of the indoor antenna with wider frequency band coverage and a higher gain, a signal coverage requirement of a wide frequency band is met, an indoor communication blind area is avoided, the mobile communication service quality is improved, the problem of repeated antenna construction caused by multi-frequency band coverage is avoided, and the requirements of saving energy and reducing emission are met.

A new measurement arrangement and method for measuring the performance of a device under test, such as an antenna, a mobile phone and other wireless terminals, are disclosed. The chamber defines an internal cavity therein, adapted to enclose the device under test, and including walls of an inwardly reflective material, rendering the walls reflective to electromagnetic waves, thereby simulating a multi-path environment. Thus, the chamber is a reverberation chamber. Further, at least one first chamber antenna and at least one second chamber antenna, are arranged in the cavity, the first and second chamber antennas being configured to transmit and receive electromagnetic waves within a first predefined frequency range and within a second predefined frequency range, respectively. A measuring instrument is connected to the device under test and the chamber antennas, for measuring the transmission between them. Furthermore, a frequency selective absorber is arranged in the cavity, the frequency selective absorber being arranged to absorb electromagnetic waves having a frequency within the first predefined frequency range and reflect electromagnetic waves having a frequency within the second predefined frequency range. Hereby, a measurement arrangement capable of testing of devices having wireless capability according to coming mobile communication standards is presented.

A method and apparatus for production testing of a device under test (DUT) in a chamber is disclosed, the chamber defining an internal cavity therein, adapted to enclose the DUT, and including walls having inwardly facing surfaces of an electromagnetically reflective material, thereby supporting several resonant modes within the internal cavity. The method comprises: arranging the DUT at one or several measurement position(s) in the internal cavity; measuring radio frequency transmission between the DUT and at least one chamber antenna arranged in the internal cavity sequentially in a number of different static mode distribution configurations; comparing the measured radio frequency transmission at said predetermined mode distribution configurations with reference values obtained from measurement of a reference device arranged at the same measurement position(s) within the internal cavity, and at the same static mode distribution configurations; and determining whether the DUT is acceptable or non-acceptable based on said comparing.

The invention relates to a wireless indoor positioning system based on a distributed antenna and a method thereof. The system contains a base station, an antenna and a terminal, the base station is connected with each indoor antenna through a feed wire, the antenna set is respectively receives a sounding signal transmitted by a terminal, after the base station obtains the signal sent by the terminal through the antenna, corresponding processing is carried out, and the antenna set employs a plane array; the method is characterized in that a channel is estimated by the base station according tothe received uplink sounding signal and a precoding matrix is generated; wave beam formation is realized according to a precoding matrix, and finally terminal detection and space positioning are carried out. The system uses the distributed antenna and combines with three-dimensional intelligent wave beam, realizes indoor real-time space positioning, is suitable for complex environment, and has theadvantages of accurate positioning and good real-time performance.

Information indicating which of channels is selected in a digital broadcasting receiver 17 is fed from a control signal transmitter 16 to a retransmitter 14. A terrestrial wave digital broadcasting wave from a transmitting station is inputted to a channel selection filter 6 through an indoor receiving antenna 1 and an automatic gain controller 4 in the retransmitter 14, and only a signal having a frequency component corresponding to the channel selected by the digital broadcasting receiver 17 is extracted, and is transmitted toward the digital broadcasting receiver 17 by a retransmission indoor antenna 13 through a variable gain amplifier 7.

A distributed indoor antenna system for over-the-air television reception includes technological improvements that increase signal quality on a display device. The system includes a plurality of active distributed antenna nodes and a reception gateway. The distributed antenna nodes are placed and oriented at various spaced-apart locations around a user's residence or other location of interest. Each of the plurality of active distributed antenna nodes includes an antenna, a demodulator, and a Wi-Fi converter. The plurality of active distributed antenna nodes receives the broadcast signals, decodes the broadcast signals, and transcodes the decoded broadcast signals into a Wi-Fi signal format. The reception gateway receives the transcoded broadcast signals and determines which signal or which signal combination to retransmit to the display device.

The embodiment of the invention provides an indoor multisystem-shared uplink and downlink signal processing method and a device for the same. In an indoor distributed system shared by multiple communication networks, at least multiple indoor antennae jointly covering the frequency range of the uplink signals are selected, the uplink signals received by the selected multiple indoor antennae in a diversity reception manner are combined into one path of uplink signal; when a base station needs to transmit the downlink signals, an antenna subset with better coverage quality is selected for performing downlink coverage according to the position of a terminal, or the amplitudes of the downlink signals of different ports are weighted, and the offset of the antenna horizontal beam after weighting is used for enhancing the downlink coverage of the needed direction. The quality of the uplink signals received by each communication network is enhanced, and the transmission quality of the downlink signals is improved.

The prevention discloses a method, equipment and system for overlaying network in monitoring room relating to the wireless communication field in order to realize the transfer from receiving the user complaints passively to find the problem of overlaying the network inside actively. The technical scheme comprises the following steps: the test task can be obtained, the communication with the indoor wire group can be realized according to the test task; the diagnosis port data package of the communication chip can be acquired and analyzed during the communication process with the indoor wire group; the indoor overlaid network performance index and/or indoor overlaid network occasion and command flow corresponding to the occasion can be determined, whether there is unusual occasions, according to the analysis; when there is unusual occasions, the warning information, which comprises at least the location information of the monitoring equipment, can be generated and reported. The invention can be applied in the wireless communication technology.

The invention discloses an indoor antenna monitoring method for mobile communication. The method comprises the following steps that: (1) each indoor antenna is provided with a signal intensity detector, and the signal intensity detectors acquire emission intensity signals of the antennae; (2) the acquired signals are digitized, numbered, converted into spread spectrum signals and wirelessly transmitted to wireless routing sensors of corresponding floors; (3) the wireless routing sensors add own numbers to the received digital signals of each antenna of the corresponding floors, and transmit the digital signals to data acquisition concentrators of corresponding buildings by the spread spectrum signals; (4) the data acquisition concentrators add own numbers to the received digital signals, and transmit the digital signals to a monitoring system center platform of China Mobile by a broadband network; and (5) system management software records, analyzes, compares and displays the digital signals. Therefore, a management department can display and manage the distribution conditions, specific mounting positions and the like of radio remote unit (RRU) equipment and the indoor distributed antennae in a mobile communication network of the whole jurisdiction district on an electronic map.

The invention discloses a mobile phone signal booster which comprises an outdoor antenna, a coaxial cable, a power divider, a coupler, an indoor antenna and a power supply, wherein the outdoor antenna is in wired connection with the power divider by the coaxial cable; the power divider, the coupler and the indoor antenna are sequentially connected; and the power supply is connected with the power divider and the coupler respectively. The booster can effectively improve various technical problems of poor mobile phone signal introduced in the background technology. An outdoor signal is connected into by the outdoor antenna of the booster in a wired manner, amplified by downlinks of the power divider and the coupler, then switched into a room, and used for making up a blind spot of a mobile phone base station, and a mobile phone signal is amplified by uplinks of the coupler and the power divider and then transmitted to the base station, so that communication is realized, and the booster is very convenient to use.

The embodiment of the disclosure provides a wireless access system that may include a baseband unit (BBU), an optical network unit (ONU), and a remote radio head (RRH), wherein the BBU may be connected to one or more ONUs, each ONU may be connected to one or more RRHs, and the connection between each ONU and the one or more RRHs can achieved by twisted pairs. The wireless access system is capable of providing large-capacity access, convergence and transmission from an indoor antenna unit to the centralized BBUs, and is easy to install so that large-scale deployment of indoor wireless access is economical. In addition, the wireless access system can support advanced wireless technologies, such as large-scale MIMO, CoMP and the like. The embodiments of the present disclosure also provide a RRH, an ONU, an optical line terminal (OLT), and a BBU.