48 results about "Radio repeater" patented technology

A radio repeater including at least first and second relay systems, each including a reception antenna configured to receive a radio signal, a loop interference suppressor, connected to the reception antenna, configured to suppress a loop interference signal in the received radio signal from said reception antenna, an amplifier configured to amplify the loop interference-suppressed radio signal from the loop interference suppressors, and a transmission antenna having a polarization characteristic, which is orthogonal to a polarization characteristic of said reception antenna, configured to transmit the output of said amplifier.

A channel capacity is increased by using MIMO (multiple input multiple output) radio relaying system. A transmission is made from a transmitter 10 using a first antenna 111 and a second antenna 112 having polarization characteristics which are orthogonalized to each other. A reception is made in a repeater 201 using reception antennas 211 and 212 each having the same polarization characteristic as the first and the second antenna 111 and 112, respectively. Each signal received by the first and the second reception antenna 211 and 212, respectively, is passed through loop interference suppressors 271 and 272, respectively, and through amplifiers 241 and 242, respectively, to be transmitted from the first and the second transmission antenna 211 and 212 having the same polarization characteristics as the second and the first antenna 112 and 111, respectively. A reception is made in a receiver 30 by antennas 312 and 314 having the same polarization characteristic as the first antenna 111, and the reception is also made by antennas 311 and 313 having the same polarization characteristic as the second antenna 112. These received signals are subject to a signal separation processing in MIMO equalizer 32.

Infrastructure is remotely inspected using a sensor pod such as an unmanned ground vehicle and sensors adapted to inspect a surface of the infrastructure and an unmanned aircraft adapted to interoperate with the sensor pod. The sensor pod drives along the surface of the infrastructure being inspected. A tether to the unmanned aircraft deploys and retrieves the sensor pod on the surface of the infrastructure. Electronic sensors of the sensor pod are deployable in a crevice of the surface of the infrastructure obstructed from view by the unmanned aircraft. The unmanned aircraft can comprise a radio repeater adapted to relay ground commands to the sensor pod.

A radio coverage extender is provided for extending the radio range of a wireless network node embedded in a user terminal, for example a ZigBee node integrated on the SIM card of a mobile phone. The radio coverage extender may include: a radio signal repeater operable to receive radio signals from the wireless network node and to retransmit the received signals externally to the user terminal, and a power supply module operable to scavenge electrical energy from electromagnetic fields in which it happens to be immersed and to store the scavenged electrical energy for supplying the stored power to the radio signal repeater. The radio coverage extender is adapted to be included in a user terminal, for example it can be a flexible, pliable film attachable to a user terminal battery.

A manhole cover is provided with an incorporated radio repeater and a repeater antenna attached onto its rear surface. Another repeater antenna is provided inside the sewer below the manhole. This repeater antenna is connected to a radio transmitter / receiver, an electric-optical / optical-electric signal converter, and an optical fiber cable. With this arrangement, the manhole cover and optical fiber cable are connected via radio communication.

Disclosed herein is a radio frequency (RF) repeater comprising an analog signal processing unit and a digital signal processing unit, wherein the analog signal processing unit includes a filtering unit; an amplification unit on receiving side; a frequency conversion unit on receiving side; a frequency conversion unit on transmitting side; and an amplification unit on transmitting side, and the digital signal processing unit includes a receiving signal detection unit; the automatic gain control unit; a feedback signal detection unit; a feedback signal combining unit; a feedback signal elimination unit; an automatic delay control unit; and the control unit.According to the RF repeater and repeating method, installation cost is reduced, limitations in output magnitude and installation are overcome, and ensuring high output power characteristics.

A radio repeater system may include: a multiple input multiple output (MIMO) donor antenna configured to transmit / receive MIMO signals to / from base stations; a beamforming control unit configured to control beamforming by adaptively applying a phase weight to the repeated signals received from the MIMO donor antenna; an interference signal cancellation unit configured to estimate and analyze feedback interference signals introduced from a MIMO service antenna to the MIMO donor antenna and adaptively cancel the feedback interference signals; and the MIMO service antenna configured to transmit / receive MIMO signals to / from radio terminals in a service area.

Provided is a united Adaptive Forward Error Correction (U-AFEC), including: an automatic gain control unit for controlling a gain of forward / backward relay signals; a switching unit for switching the forward / backward relay signals; a forward feedback signal detecting unit for detecting and updating a phase and a size of a feedback signal; a backward feedback signal detecting unit for detecting and updating the phase and the size of the feedback signal; a reverse feedback signal synthesizing unit for generating a reverse feedback signal based on the phase and the size of the feedback signal; a feedback signal removing unit for removing the feedback signal in the forward / backward relay signals and transmitting the forward / backward relay signals to the automatic gain control unit; and a control unit for removing the feedback signal in the forward / backward relay signals and controlling each constituent element.

A computer device may include a memory storing instructions and processor configured to execute the instructions to establish a communication channel with a fixed wireless access (FWA) user equipment (UE) device associated with a provider; scan for Fifth Generation (5G) New Radio (NR) antenna beams from a base station associated with the provider; and identify a plurality of 5G NR antenna beams. The processor may be further configured to rank the plurality of 5G NR antenna beams based on a key performance indicator (KPI); select a highest ranked antenna beam, from the plurality of 5G NR antenna beams, via which the FWA UE device is able to connect to the base station associated with the provider while satisfying a threshold requirement associated with the KPI; and use the selected antenna beam to exchange wireless signals between the base station and the FWA UE device.

The method includes steps: setting up radio controller connected to central host in digital household network; laying out radio repeaters in use for forwarding radio signal between source and destination device (DD); building up wireless local area network composed of radio repeaters, remote controller, and radio controller through radio signal; when receiving data packet needed to reply, if receiving response from DD within repeater delay time (RDT), radio repeater does not need to relay the signal; if not receiving response, then radio repeater forwards data packet; when receiving broadcast data not needed to reply, then radio repeater forwards data packet after RDT. When radio data are unable to reach DD caused by distance or other reasons, the invention uses radio repeater to relay radio signal so as to guarantee that user can control each household device effectively in larger spatial dimension.

A radio repeating system has first and second radio terminals, a radio repeater to receive a signal transmitted from the first radio terminal and transmit the signal to the second radio terminal, and a controller to control the radio repeater. The controller has a terminal signal determiner to detect a signal from the first radio terminal to determine whether the first radio terminal is in a transmission halt mode or a transmission mode, a first counter to start counting when a result of detection is the transmission halt mode, and a second counter to start counting when a result of detection is the transmission mode. The controller halts a wireless relay operation of the radio repeater when the result of detection is the transmission halt mode while the second timer is operating, or when the first timer finishes counting.

The invention discloses a self-adapting self-excitation interference eliminating repeater, which comprises: two duplexers, which are respectively communicated with a donor antenna and a spot beam antenna, and are used for the switch between the up-link and down-link; two amplifier modules, which are arranged between two duplexers and are respectively used for forming the up-link and down-link, and used for amplifying the power or filtering the noise respectively for the up-link and down-link signals; moreover, the up-link and / or down-link are provided with a self-excitation preventing module, used for eliminating the self-excitation component produced by the antenna at the output terminal within the RF signal of the link. The shared-channel radio repeater of the invention effectively eliminates the self-excitation produced by the feedback signal in a self-adapting way, thereby the requirement for the isolation of the forward, backward antennas is decreased; and the system gain is raised. The invention is suitable for the SM / CDMA / CDMA2000 / WCDMA mode repeaters, and can be applied to TD-SCDMA repeater system and digital television system, etc. through proper improvement.

A method of facilitating radio communications involves receiving a first message from a first remote radio station on a first radio channel, transmitting the first message to a second remote radio station on a second radio channel, receiving a second message from the second remote radio station on a third radio channel, and transmitting the second message to the first remote radio station on a fourth radio channel. A method of radio communication involves receiving a first radio signal from a first remote radio station on a first radio channel, transmitting a second radio signal to the first remote radio station on a second radio channel, receiving a third radio signal from a second remote radio station on a third radio channel, and transmitting a fourth radio signal to the second remote radio station on a fourth radio channel. Radio signal repeater and mobile station apparatuses are also disclosed.

The invention discloses a disaster tolerance method for a radio access network. The method comprises that: an ordinary base station judges whether transmission interruption condition caused by a disaster occurs or not; and if the transmission interruption condition caused by the disaster is judged to occur, the ordinary base station enters a radio repeater operating mode according to a preset radio repeater parameter, establishes connection with a nearby robust base station, and receives and forwards signals between the robust base station and a terminal. By the embodiment of the invention, the ordinary base station can automatically enter the radio repeater operating mode according to the preset radio repeater parameter after suffering from the disaster, establish the connection with the nearby robust base station, and receive and forward the signals between the robust base station and the terminal, thereby avoiding the large-scale establishment of the robust base stations and saving investment, particularly transmission link investment in satellite communication.

A radio relay device, which is used in the following radio communication system and is equipped with an antenna device, the antenna device has an antenna facing a base station and an antenna facing a terminal, and is used for transmitting between the base station and the terminal and receiving radio waves, the above-mentioned radio communication system adopts the TDMA method in which the frequency bands used in the transmission channel and the reception channel are close to each other, and the above-mentioned antenna device makes the direction of the polarization plane of the antenna facing the base station and the direction of the polarization plane of the antenna facing the terminal different settings.

The invention provides a radio signal repeater monitoring system, which comprises a radio signal repeater monitoring device and a monitoring center. The radio signal repeater monitoring device is positioned on a monitored radio signal repeater and used for receiving an operating instruction from the monitoring center, detecting the related information of the monitored radio signal repeater according to the operating instruction and transmitting the detected information to the monitoring center. The monitoring center comprises a client, a WEB server, an application server and a mobile communication server, wherein the WEB server and the application server provide intra-network accessing and WEB accessing over the radio signal repeater monitoring device for the client respectively; and the mobile communication server is used for providing information transmission between each of the WEB server and the application server and the radio signal repeater monitoring device. The radio signal repeater monitoring system provided by the invention can detect and set the related information of the monitored radio signal repeater in real time by utilizing the radio signal repeater monitoring device without manual tour inspection, is low in cost and time consumption and can timely and accurately acquire the information.

A system includes a fire hydrant; a gain antenna operatively connected to the fire hydrant; at least one battery operatively connected to the fire hydrant; and a radio repeater operatively connected to the fire hydrant. The gain antenna includes any of a vertical monopole and a dipole antenna. The battery may include a lithium thionyl battery. The battery powers the radio repeater. The radio repeater includes a microprocessor; a memory component; and a radio transceiver. The system may further include a non-metallic enclosure that houses the radio repeater. The gain antenna may be operatively connected to the radio repeater inside the non-metallic enclosure. The radio repeater may further include an electronic voltage reference source that provides a stable voltage reference level that is lower than a lowest battery operating voltage of the at least one battery.

The invention addresses the problem of parameter optimization for best filter performance and, in particular, the influence from the requirements on radio or fiber to radio repeaters utilizing those filters, that often proves to be conflicting for an FIR filter. The FIR filters are implemented in a programmable circuit and are not thereby restricted for use in communication repeaters although this particular usage may put the most serious restrictions on the filter performance. Within the imposed constraints, this disclosure illustrates a method to strike a middle ground while minimizing the trade-offs. The advantage of the concept presented allows the choice of a suitable filter pertaining to a particular traffic configuration, meaning a particular choice of individually filtered frequency bands set at different gain and intended to support a diversity of traffic formats. The disclosed approach banks on the reconfigurable variable length FIR filter architectures. Implementation architecture and results in brief are also presented.

The invention addresses the problem of parameter optimization for best filter performance and, in particular, the influence from the requirements on radio or fiber to radio repeaters utilizing those filters, that often proves to be conflicting for an FIR filter. The FIR filters are implemented in a programmable circuit and are not thereby restricted for use in communication repeaters although this particular usage may put the most serious restrictions on the filter performance. Within the imposed constraints, this disclosure illustrates a method to strike a middle ground while minimizing the trade-offs. The advantage of the concept presented allows the choice of a suitable filter pertaining to a particular traffic configuration, meaning a particular choice of individually filtered frequency bands set at different gain and intended to support a diversity of traffic formats. The disclosed approach banks on the reconfigurable variable length FIR filter architectures. Implementation architecture and results in brief are also presented.

Disclosed herein is a radio frequency (RF) repeater comprising an analog signal processing unit and a digital signal processing unit, wherein the analog signal processing unit includes a filtering unit; an amplification unit on receiving side; a frequency conversion unit on receiving side; a frequency conversion unit on transmitting side; and an amplification unit on transmitting side, and the digital signal processing unit includes a receiving signal detection unit; the automatic gain control unit; a feedback signal detection unit; a feedback signal combining unit; a feedback signal elimination unit; an automatic delay control unit; and the control unit.According to the RF repeater and repeating method, installation cost is reduced, limitations in output magnitude and installation are overcome, and ensuring high output power characteristics.

A fire control system may include a fire alarm control panel situated at a first location, the fire alarm control panel coupled to a first hardwire circuit. The fire control system may also include one or more telephone stations, wherein each telephone station of the one or more telephone stations is disposed at a different location than each other telephone stations and coupled through the first hardwire circuit to the fire alarm control panel, and one or more radio repeaters are each disposed at one or more respective locations, and wherein each radio repeater is operative to receive audio information as a radio signal and to transmit the audio information as an electrical signal through a second hardwire circuit to the central telephone.

Antenna elements (1 to 4) are arranged to form rhombuses, each side having a length (a) of a half wavelength ( lambda / 2). Antenna elements (5 to 12) are bent at three points so that each side can have a length (b) of a quarter wavelength ( lambda / 4). Groups of antenna elements (1 to 4), (5 to 8) and (9 to 12) are connected as shown in the figure. The antenna elements (9, 10) and the antenna elements (11, 12) are connected to a feeder (13). This configuration provides a high-gain antenna having a simplified flat structure.

Provided is a united Adaptive Forward Error Correction (U-AFEC), including: an automatic gain control unit for controlling a gain of forward / backward relay signals; a switching unit for switching the forward / backward relay signals; a forward feedback signal detecting unit for detecting and updating a phase and a size of a feedback signal; a backward feedback signal detecting unit for detecting and updating the phase and the size of the feedback signal; a reverse feedback signal synthesizing unit for generating a reverse feedback signal based on the phase and the size of the feedback signal; a feedback signal removing unit for removing the feedback signal in the forward / backward relay signals and transmitting the forward / backward relay signals to the automatic gain control unit; and a control unit for removing the feedback signal in the forward / backward relay signals and controlling each constituent element.