Abstract: A method of obtaining single wire transmission line (440) wherein the use of short wavelengths yields low radiation losses and wherein transmission line losses are compensated by repeaters (19, 213-219) at required intervals.

Abstract: A modulation device comprises for each carrier frequency: means of discrimination between a signal coming from a first channel of a communications link and a signal coming from a second channel of said link, so as to obtain differentiated first and second signals; first assigning means, enabling the assigning of the first differentiated signal to one of the two modulation arms, and the second differentiated signal to the other of the two modulation arms.

Abstract: A system and method is disclosed for increasing the efficiency of a cellular communication network, reduce ongoing operating costs and increase revenue. According to one aspect, a method is disclosed for increasing the efficiency of a cellular communication network whereby network capacity in the radio access network (RAN) and baseband processing for wireless connections are dynamically adjusted to automatically provision sufficient bandwidth and baseband processing capacity in response to changes in the network. The method is further extended by implementing policy management which allows wireless carriers to develop and implement network based policies to automatically increase or decrease the amount of processing resources and network bandwidth required from any cell site, hub or mobile switching office. According to another aspect, network efficiency is enhanced by utilizing a novel cellular network infrastructure.

Abstract: A communication system is disclosed that includes a first device that performs communication of information with the outside; a second device through which the information is input and output; and a relay device that performs wired communication with the first device and wireless communication with the second device to relay the information between the first device and the second device.

Abstract: A method and system for facilitating calling within an enterprise network upon failure of a landline connection between the enterprise network and an outside call server such as an IP Centrex server. Upon failure of the landline connection, an enterprise router switches over to a backup wireless packet-data link, such as a 3G cellular link for instance. Thus, packet-based call signaling can continue to flow between the enterprise network and the call server so as to continue setting up inside calls between enterprise telephone stations. The backup wireless packet-data link can also be used to carry a limited extent of outside calls, such as emergency calls for instance.

Abstract: The present invention is generally directed to a system and associated method for communicating information. In some embodiments, the invention is directed to a general purpose transceiver having a receiver for receiving an information signal and a transmitter configured to transmit an outgoing signal to a central station. A portion of the information signal can include an instruction code, which may be decoded and acted upon accordingly. Other embodiments and features are also claimed and described.

Abstract: There is provided a method of facilitating communication in an electrical power network having a complex impedance. The method includes modifying the complex impedance, and determining whether the modifying affected a quality of the communication.

Abstract: The present invention comprises a docking system for connecting a portable communication device to a further signal transmission line. The docking system may be arranged within a workstation such as a desk or a tray. The system may also envelope a room in a building or be located in a vehicle, to control and restrict the radiative emission from the communication device and to direct such radiation to a further remote antenna and or signal distribution system connected to the transmission line.

Abstract: A method and apparatus of transmitting a communication signal between a radio base station and a radiation element. In one embodiment, the method includes receiving an input signal. Then extracting a data signal from the input signal, the data signal includes values representing operating parameters of devices at the radiation element. And producing a status signal for each device that simulates a feedback signal for the device.

Abstract: A cable system comprises a main line carrying first RF signals for a plurality of subscribers, and a subscriber line coupled with the main line and carrying the first RF signals between the subscriber's facility and the main line and also carrying second RF signals that are different in frequency from the first RF signals. The system further comprises a rectifier/voltage multiplier connected to the subscriber line for converting AC energy in the second RF signals into DC current, and an active RF device powered by the DC current from the rectifier/voltage multiplier, the RF device being located along the subscriber line. The system can include a filter connected between the subscriber line and the rectifier/voltage multiplier for filtering the second RF signals. The rectifier/voltage multiplier can be located either inside or outside the subscriber's facility.

Abstract: A communication system and a communication method for permitting a user of a cell-phone to receive data in a non-service area via an MFP. When the communication condition between a base station and a cell-phone becomes bad, the base station sends a map showing the current position of the cell-phone and the locations of nearby MFPs to the cell-phone. The user of the cell-phone selects one from the MFPs on the map and notifies the base station of the selected MFP. The base station sends an e-mail addressed to the cell-phone to the selected MFP, and the MFP stores the e-mail therein. The user of the cell-phone makes an access to the MFP by short-distance wireless communication to receive the e-mail.

Abstract: A transmission system for RF signals, power and control signals over RF coaxial cables is disclosed. A coaxial cable line interconnects two devices, such as an instrument and a remote coupler. A control signal (e.g., data bit) and RF signals are multiplexed onto the coaxial cable line using a bias network at each end of the coaxial cable. In certain embodiments, power is generated at the coupler based on the state of the control bits. Each coaxial cable carries one control bit on the center conductor of the cable. A table maps the states of the one or more control bits to the desired states in the remote coupler. The all-zeroes state for the control bits is disallowed, such that at any given time, at least one of the control lines is high (e.g., at +5V). A passive network at the coupler generates the power voltage for the coupler from the control bits. In further embodiments, a power supply filter is provided at the coupler to supply power to the coupler during transitions of the passive network.

Abstract: A CATV network is modified with a secondary transmission (CBP) by adding filters to separate modified mobile-communications frequencies. A CATV terminal can be routed to cellular network by way network coupling devices (NCD).

Abstract: The present invention comprises a docking system for connecting a portable communication device to a further signal transmission line, The docking system may be arranged within a workstation such as a desk or a tray, The system may also envelope a room in a building or be located in a vehicle, to control and restrict the radiative emission from the communication device and to direct such radiation to a further remote antenna and or signal distribution system connected to the transmission line.

Abstract: A radiation information management device comprises a measuring unit, a comparing unit, and a management information generating unit. The measuring unit measures unwanted radio wave radiation radiated from a balanced transmission line. The comparing unit compares a measured value of unwanted radio wave radiation, which the measuring unit has measured, with a reference value that is predetermined, and then notifies the comparison result to the management information generating unit. The management information generating unit refers the comparison result, generates the management information related to the unwanted radio wave radiation including information showing that the measured value is exceeded the reference value, then notifies to a first communication device and a second communication device. The first communication device and the second communication device take a measure to reduce transmitting power based on the management information regarding the unwanted radio wave radiation.

Abstract: A system for communications on a bi-directional medium includes a first repeater, a second repeater, a third repeater and a fourth repeater, each of which is coupled to the medium. The first repeater and the second repeater communicate with each other on a first band for transmission from the first repeater to the second repeater, and on a second band for transmission from the second repeater to the first repeater. The second repeater and the third repeater communicate with each other on a third band for transmission from the second repeater to the third repeater, and on a fourth band for transmission from the third repeater to the second repeater. The third repeater and the fourth repeater communicate with each other on the second band for transmission from the third repeater to the fourth repeater, and on the first band for transmission from the fourth repeater to the third repeater.

Abstract: Methods, apparatuses, and systems enabling an information exchange system allowing for the transmission of a message carrier containing at least one message code along with video and television data, as well as subsequent capture and decoding of the message carrier to identify the at least one message code. As discussed herein, implementations of the invention can be used in connection with an electronic commerce and data interchange system featuring a Universal Digital Assistant (UDA) that facilitates financial transactions and data interchange, as well as dissemination, management and exchange of commercial information (e.g., advertising, promotions, sales announcements, and the like) and personal information (e.g., address and other contact information, driver's license number, and memberships). The invention, in one implementation, provides an end-to-end e-commerce solution that can transform a mobile phone/PDA (Personal Digital Assistant) into a Universal Digital Assistant configured to receive data (e.

Abstract: The invention proposes a repeater designed for indoor transmissions. The useful frequency band is split into two frequency bands and the repeater amplifies the signals from one of the bands and translates them to the other band. The transposition of frequency bands results in preventing creating significant interference effects on the signal to be amplified. A management circuit is used to address, at lower cost, interference problems between the bands.

Abstract: Apparatus for coupling communication signal modulated radio frequency signals between an electrical power distribution line and the electrical power wiring at a customer's premises which includes a first transceiver for transmitting and receiving electromagnetic energy is inductively coupled to the distribution line and a second transceiver for receiving electromagnetic energy from, and transmitting electromagnetic energy to, the first transceiver. The second transceiver is coupled to the customer's power wiring to receive communication signals from, and to supply communication signals to, the customer's power wiring. The electrical power for the first transceiver can be supplied by inductive coupling to the power line and/or a battery, the battery being a back-up source when both inductive coupling and a battery are present.

Abstract: A base station in a mobile communication network, includes at least one transmission line for transmitting a radio frequency signal. Each transmission line includes a coupling hole. A two-port coupled line includes one or more coupling holes. Each transmission line and the coupled line are couplable to form a coupling by setting the coupling hole of the transmission line against the coupling hole of the two-port coupled line. The coupling enables a signal sample of the radio frequency signal to propagate from the transmission line to the two-port coupled line.

Abstract: A multi-sector in-building repeater, including: a master transmitting unit for receiving multi-sector signals of a carrier from a base station, mixing the multi-sector signals with different transmission intermediate frequency signals, and outputting mixed multi-sector signals to a same transmission line; a plurality of slave transmitting units for extracting sector signals assigned to the multi-sector signals from the master transmitting unit, converting extracted sector signals into high frequency signals, and transmitting converted high frequency signals through an antenna to a mobile terminal.

Abstract: A wireless communications systems employing code-division multiple access information transmission techniques includes a transmission facility having ground-based transmission and reception electronic equipment, a remotely located RF power amplifier, an antenna, and an RF cable connecting the ground-based equipment with the remotely located RF power amplifier. Power level detectors in the ground-based equipment and in the remotely located RF power amplifier measure the signal level at each end of the RF cable. A microcontroller compares these measurements and adjusts a variable attenuator in the transmission signal path and a variable attenuator in the received signal path to compensate for signal level variability due to variations in signal loss.

Abstract: In a CATV trunk amplifier, a downward signal input to an input terminal from the center equipment side is input to a downward amplifying circuit via a first filter and a second filter. The amplified downward signal is output to the terminal device side via the second filter, the first filter, and an output terminal. An upward L signal is input from the terminal device side via the output terminal to an upward L amplifying circuit via the first filter and a third filter. The amplified upward L signal is output to the center equipment side via the third filter, the first filter, and the input terminal. An upward H signal is input to an upward H amplifying circuit via a fourth filter. The amplified upward H signal is output to the center equipment side via the fourth filter and the input terminal.

Abstract: A radio frequency communication system utilizing a radiating transmission line for communicating data signals is disclosed. The data signals convey digital data to remotely located data devices, including computers, equipment control systems and digital video cameras. The data signals have a wide bandwidth of about 0.5 MHz to 32 MHz. In this way, the communication system creates a local area network by means of the radiating communication line. The communication system is intended to be used in environments where radio waves do not propagate well, such as in underground environments, and in particular mines. The communication system comprises at least one amplifier connected to the radiating transmission line for periodically amplifying the data signals by demodulating the data signals to recover the data contained therein and then modulating the recovered data into a regenerated radio frequency at a power level permitting transmission and radiation of the regenerated radio frequency data signal.

Abstract: A network of electronic devices such as computers (50) and/or calculators (36, 38) uses low power communication to transmit wireless signals through a distributed antenna system (40). The distributed antenna system may be formed in conjunction with ceiling or floor tiles 62 or modular office components (44 and 46) or student desks. The distributed antenna system 40 reduces the effective distance between a transmitting and receiving device to a nominal distance.

Abstract: A method for extracting a constant part and a variable part from a data signal that is determined. The values that are extracted in this way are transmitted with different timing over a transmission link that is present. Depending on the bandwidth of the composite signal, various methods can be applied for transmitting relatively low bandwidth signals with possibly higher resolution.

Abstract: There is disclosed a signal monitoring apparatus for use in a wireless network base station containing a modular main unit for processing baseband signals and a modular radio unit separate from the main unit for transmitting and receiving radio frequency (RF) signals. The signal monitoring apparatus is disposed in the radio unit and monitors an RF output signal transmitted by a transceiver in the radio unit. The signal monitoring apparatus comprises an RF mixer that mixes the RF output signal and receiver local oscillator (LO) signal used by the receiver portion of the transceiver to demodulate received RF signals. The RF mixer generates an intermediate frequency (IF) signal capable of being transmitted through a communication line at relatively low signal loss to a signal measuring device located in the main unit or elsewhere.

Abstract: A self-calibrating radio is described. In one exemplary implementation, a radio signal from its local voltage controlled oscillator. The calibration system automatically calibrates the radio by: (i) receiving a reference signal having a calibrated reference frequency, (ii) comparing the local frequency to the reference frequency to determine whether there is a difference between the local frequency and the reference frequency and (iii) adjusting the local frequency by an offset frequency, if the difference between the local frequency and the reference frequency is greater than a threshold value.

Abstract: A repeating apparatus of the present invention converts a data signal from the mobile switching center to an intermediate frequency signal and transfers the intermediate frequency signal to an unused telephone line and a dedicated line network. The apparatus converts the intermediate frequency signal transferred through the unused telephone line and the dedicated line network to the data signal frequency signal and transfers the data signal to the mobile switching center. In the present invention, the intermediate frequency signal is transferred between a mother station and at least one first child station through the unused telephone line and the intermediate frequency signal is modulated to transfer between the mother station and at least one second child station through the dedicated line network.

Abstract: A digital radio frequency transport system that performs bi-directional simultaneous digital radio frequency distribution is provided. The transport system includes a digital host unit and at least two digital remote units coupled to the digital host unit. The bi-directional simultaneous digital radio frequency distribution is performed between the digital host unit and the at least two digital remote units.

Abstract: The invention discloses a radio network for radio communication in an enclosed environment such as a tunnel or an in-house environment including a first head end station (1) and cascaded bi-directional repeaters (4, 5, 10) connected via a radiation cable (3). In case of a break of the radiation cable, a second redundant head end station (2) is connected to the radiating cable via switch (30) and to the first head end station via a second connection (11) and the repeaters behind a disconnection point of the radiating cable (3) interchange their downlink and uplink transmission directions, such that the radio communication is possible in front and behind the disconnection point. Furthermore, the repeaters are adapted to detect a malfunction of themselves and to bypass themselves in reaction to the detection of a malfunction.

Abstract: A repeater for use in a two way communication system for retransmitting information between a first device and a second device to help ensure reliable two way communication between the devices, comprising: a transmitter/receiver, the transmitter/receiver receiving signals from the first and second devices and transmitting the received signals for reception by the respective first and second devices; and further wherein a direct communication path for the information between the first and second devices is provided, the direct communication path being intermittently unreliable, the repeater providing an additional path for the information between the first and second devices; the repeater being spaced from said first and second devices by a specified distance, said specified distance being significantly less than a theoretical maximum communication distance thereby to ensure communication reliability.

Abstract: The present invention relates to a method and apparatus for selectively enabling and disabling transmit and receive functions of a radio, and more particularly to a system and method utilizing an out-of-band signal over a time division duplex channel to control transmit and receive functions of a radio so as to synchronize with the functions of a remote modem. The invention relates to a system and method for synchronizing the transmit and receive modes of a radio via an out of band signal. The out of band signal is preferably a control tone at a predetermined frequency and is substantially coextensive with the communication signal to be transmitted. The radio filters a multiplexed signal and detects if the control tone is present. If the control tone is not detected, the radio preferably remains in the default receive mode. If the control tone is detected, the radio operates in the transmit mode for the duration of the control signal.

Abstract: A novel base station for cellular wireless communications based on a modular structure is provided. The modular cellular wireless communication base station includes a plurality of active radiator modules (ARM's) located at a desired antenna location, a beam forming network controlling relative amplitudes and phases of each of the modules and an RF front end. Each module (100) includes at least one antenna (ant) for transmitting and receiving, a transmitter having a power amplifier, and receiver.

Abstract: A solution for providing an improved fading margin environment for in-building wireless coverage. An optical fiber or other available broadband signal distribution network is used to distribute signals between centrally located base transceiver station (BTS) equipment and remotely located transceiver equipment referred to herein as a cable microcell integrator (CMI). The CMIs are deployed in a configuration to provide radio frequency coverage in a desired microcell area such as a building floor. In a preferred embodiment, a leaky coaxial cable is used as a radiating element within the microcell.

Abstract: Repeater apparatus for conveying a radio-frequency (RF) signal into an environment closed-off to the RF signal, including a master transceiver unit having a master port which receives the RF signal, a local oscillator (LO), which generates a LO signal at a LO frequency, and a frequency divider which divides the LO frequency of the LO signal by an integer to produce a divided LO signal. The master transceiver unit also includes a master mixer coupled to the master port and the divider which generates an intermediate-frequency (IF) signal responsive to the RF signal and the LO signal.

Abstract: Methods and apparatus are provided for optimizing a receive side subsystem of a cellular communication system with a transmit side subsystem of the system. The receive side subsystem includes one or more superconducting components, preferably a superconducting filter, coupled to an amplifier, preferably a low noise amplifier. The transmit side subsystem includes a transmitter and, preferably, a power amplifier. The system matches and balances the range or radius of the received side subsystem with the range or radius of the transmit side subsystem. As a result, the receive range and the transmit range of the system overlap. A control system configured to match and balance the subsystems is optionally provided.

Abstract: A symmetric N×N branch-line hybrid power divider/combiner has N input ports and N output ports. The divider/combiner divides received powers at each input port and transmits and combines the divided powers to the output ports. The divider/combiner includes N through transmission lines, each coupling a respective input port to a respective output port. The divider/combiner also includes N input branch transmission lines, each coupling a respective input port to a central input node and N output branch transmission lines, each coupling a respective output port to a central output node.

Abstract: A wireless communication system combines time and space diversity to reduce fading and simplify receiver design. In particular, a data packet which carries digital telephone traffic, is transmitted at three different times from three different antennas. The mobile subscriber receiver thus receives the same data packet at three different times from three different antennas, and uses the best data packet or combination of the data packets to reduce the effects of fading. A transfer station receives a time division multiplex multiple access (TDMA) signal from a base station carrying telephone data packet traffic to form three data packet repeats at spatially diverse antennas locations. The transfer station further modulates a code division multiple access (CDMA) system using a TDMA signal which links the mobile subscriber receiver to the transfer station. Each data packet received at the transfer station is thus retransmitted at three different times to the mobile subscriber station on a CDMA link.

Abstract: This invention provides designs for communication systems that use adaptive filters in circuits whose purpose is to enable two-way transmission of information signals in the same frequency band at the same time over twisted pair channels, coaxial cable channels, fiber optic channels, or wireless channels. The methodology allows two-way DSL transmission over telephone lines, making use of existing DSL hardware and signal standards, so that the upload speed is increased by an approximate factor of ten. Applied to wireless systems with single antennas at the two ends of the channel, a doubling of the data rate is achieved for a given bandwidth. Applied to wireless systems with 2-way adaptive antenna arrays at a central location and a 2-way adaptive antenna array at each of a plurality of subscriber locations, the data rate for a given bandwidth is increased by a large factor.

Abstract: The present invention provides an economic optical conversion relay amplification system avoiding a beat noise in an uplink line of an optical transmission line of multibranching and multinode multiplexing type.

Abstract: RF digital information signals are interfaced with a medium voltage power line data channel. An interface circuit connects between the medium voltage and low voltage sides of a step-down power transformer. The interface circuit includes a metal oxide arrestor (MOV) and an opto-coupler. The MOV provides the needed capacitance and voltage rating without the bulk of a capacitor having similar capacitance and voltage rating. The opto-coupler provides an added margin of safety for coupling communications data while isolating the medium voltage power from the low voltage side of the transformer.

Abstract: Uniform and concentrated radio broadcast signals are obtained employing an antenna structure which uses separate antenna conductors on opposite sides of a radio reception area. The antenna conductors perform similarly to the plates of a capacitor. Highly efficient antenna performance results. In a preferred embodiment wherein the antennas are used for radio testing inside a vehicle assembly plant, the track or carrier structure of the vehicle assembly line provides one of the antenna conductors.

Abstract: A carrier changing apparatus in a mobile telecommunication system for generating a dummy frequency assignment signal for repeating a frequency conversion or providing a hard hand off based on a traffic signal is provided. In the carrier changing apparatus, a transmitting carrier changer transmits an input forward traffic signal having traffic and overhead information and generates a forward dummy frequency assignment signal based on the forward traffic signal. A receiving carrier changer receives and outputs a reverse traffic signal having traffic and overhead information from a mobile station and generates a delayed reverse traffic signal based on a reverse dummy frequency assignment signal from the mobile station.

Abstract: A method and system for the reception, conversion and distribution of wireless signals over AC power lines to one or more telephone communication devices within a building, office or complex is disclosed. This invention specifically provides for the reception of PCS, cellular and/or satellite communication signals, by receiving the wireless signal and providing an interface to standard generally available telephone equipment. By making use of the power line carrier channel, this invention provides for the reception of the wireless signals upon telephone equipment that is located in the building or complex in locations remote from standard telephone wiring. Moreover, by distributing such received wireless signals over the power line a number of telephone devices can be used to receive the distributed signals.

Abstract: A cryogenic waveguide cavity filter for use in a wireless communication systems.

Abstract: A method and a circuit for detecting transmission of a radio frequency (RF) signal and generating control signals to regulate the operation of a RF converter remotely located from a corresponding transmitter are disclosed. The method comprises the following steps: (a) sensing the direction of a RF signal flowing in an RF transmission line, at a location proximate of the RF converter; (b) generating a low-power RF signal in response to the sensed direction; and (c) transforming the low-power RF signal into a control signal to regulate the operation of the RF converter.

Abstract: A communications system and method are provided for reducing noise in a distributed antenna network. The system includes a plurality of remote antenna units with each remote antenna unit including a receiver for receiving input signals, a signal strength processor for determining whether a valid signal is present at its respective remote antenna unit and an output controller for switching off the network connection when no valid signal is present. As a result, the cumulative noise generated by uplink stages connected to the remote antenna units is reduced by switching off the network connection of remote antennas that are do not have to be connected. The communications system and method may further include an output controller for controlling the output for its respective remote antenna unit based on the comparison by the signal strength processor.

Abstract: An encapsulated tubular conductor having at least two antenna elements disposed on the capsule thereof for maintaining therebetween wireless information transmission in a transmitting-receiving direction, and a transmitting-receiving device located outside the capsule and assigned to one of the antenna elements includes another transmitting/receiving device also disposed outside the capsule and assigned to the other of the antenna elements, the antenna elements being directed towards an interior space of the capsule, the interior space serving as a transfer path via which information is transferable between the transmitting-receiving devices.

Abstract: A distributed strip-type radiating cable comprised of a plurality of generally flat conductive strips disposed in substantially parallel relationship to one or more generally flat dielectric materials, adapted to radiate RF energy for communications applications. The radiating cable is designed to be efficiently and inexpensively manufactured and installed from lightweight, small size materials, and is designed to be easily attached and secured to a variety of surfaces.