Matches 51 - 100 out of 147 < 1 2 3 >
Match Document Document Title
6377782 Method and apparatus for communicating between a client device and a linear broadband network  
A method of upstream communication over a linear broadband network includes the steps of generating an upstream baseband signal and modulating it onto an upstream wireless radio frequency carrier...
6356534 Spread-spectrum changeable base station  
A selected unit of a plurality of units receives data for others of the plurality of units over a first frequency. The selected unit mixes the received data from the other units with data of the...
6347223 Method and receiver for data transmission  
A method and a device are specified for data transmission via an air interface between radio stations in a radio communications system. Data to be transmitted are grouped into message blocks at the...
6317418 Method for transmitting packet switched data in a mobile communications system  
The invention relates to a method for transmitting packet switched data in a mobile communications system using an ARQ protocol. In the method the receiver requests, if necessary, retrasnmissions...
6289003 Method for transmitting packet switched data in a mobile communications system  
The invention relates to a method for transmitting packet switched data in a mobile communications system using an ARQ protocol. In the method the receiver orders the desired transmission units....
6275475 System and method for maintaining spectral capacity in time division duplex (TDD) systems  
A communications system (100) has at least one TDD platform pair (130, 200) operating synchronously using a Time Division Duplex (TDD) frame structure. A TDD platform pair (130, 200) has first...
6272121 Spread spectrum communication system using DECT protocol  
A time division multiplexed wireless communication system using the DECT protocol with spread-spectrum modulation. The wireless communication system includes a spread-spectrum transmitter and...
6256296 Network communications link  
A wireless communications link, including a base unit and at least one remote unit. The base unit is connected to a wired communications line, so as to receive electrical signals from the line and...
6252691 Intrasatellite wireless communication  
A wireless intrasatellite communication system is disclosed. Satellite telemetry signals are multiplexed, converted into a digital data stream, and processed by an ASIC to form a multiplexed...
6243363 Process of switching to a server of cells sent by a module linked to a local access network for mobile (stations), as well as such a network for implementation of said process  
The invention concerns a directional method for a server for cells transmitted by a module attached to a local mobile area network as well as a network of this type for implementing said method....
6240274 High-speed broadband wireless communication system architecture  
Techniques and architecture as well as channel multiplexing schemes to design and implement multi-megabit and gigabit transfer of data in situations requiring or optimized by wireless communication...
6212172 Filtering method to allow FDD and TDD operation in PCS transreceivers  
A transreceiver allows efficient operation in a full or half-duplex TDD or FDD system. The preferred transreceiver includes a common set of filters used for both FDD (Frequency Division Duplex) and...
6154661 Transmitting on the downlink using one or more weight vectors determined to achieve a desired radiation pattern  
This invention relates to a method and apparatus for transmitting one or more downlink signals simultaneously over the same conventional channel from a communication station to one or more...
6125138 Base station transmitter-receiver  
In a case where transmission and reception timing of a base station has not been synchronized to that of another base station in the vicinity, or in a case where it is necessary to establish such...
6118775 Security of packet-mode transmission in a mobile communication system  
A method for data transmission between a transmitter and a receiver in a digital mobile communication system comprising at least one mobile station and at least one air interface, in which method...
6115363 Transceiver bandwidth extension using double mixing  
A radio transceiver system uses a single variable local oscillator frequency source which is used in mixing both before and after a band-pass filter. This causes a reduction in band-pass filter...
6091715 Hybrid radio transceiver for wireless networks  
A hybrid radio transceiver that includes one wideband receiver and multiple narrowband transmitters for use in wireless networks, having the advantage of providing lower cost but performance that...
6075991 Wireless base station with near-far gain compensation  
A wireless base station receiver receives weak signals from mobile units at a first position using a first receiver configuration and strong signals from mobile units at a second position using a...
6058104 Communications webs for PSTN subscribers  
Systems for connecting telecommunications infrastructure lines to telephones, handsets, computers, telecopy machines and other end user interfaces or consumer electronics devices in a residence or...
5959979 Half-duplex communication system for telemetry modems  
Data transmission by a half-duplex transceiver over a full-duplex cellular telephone system using the EIA/TIA-553 standard is achieved by monitoring the forward channel to synchronize the...
5956326 System and method for frequency division duplex/time division duplex radio frequency communication  
A method of radio frequency communications between a first unit and a second unit. The method includes the steps of transmitting during a first time interval over a first frequency by the first...
5946120 Wireless communication system with a hybrid optical and radio frequency signal  
A digital communication system for transmitting and receiving a hybrid optical and RF communication signal. The system includes a hybrid transmitter that incorporates an optical transmitter, an RF...
5818619 Wireless communication system  
The invention provides a wireless communication system having an airlink transceiver including an airlink transmitter and an airlink receiver for respectively transmitting and receiving signals...
5815804 Dual-band filter network  
A dual band filter network for a radio communication apparatus is provided. The network has an antenna (212) for receiving and transmitting signals from a first frequency band and a second...
5815298 System and method for wirelessly communicating a sound signal  
A system for communicating a signal representing the amplitude of a sound signal received at a remotely located transceiver via an optical airlink communication network, the system having an...
5677942 Wireless interface  
A wireless telephone system includes: a PBX connected by a wireline to at least one base station for communicating over a radio link with mobile telephones; a unit for transmitting and receiving...
5642348 Access director interface for narrowband/broadband information distribution network  
An access director provides a gateway for customer premise based equipment (both wired and wireless) and a wireless port facility to a narrowband/broadband information distribution network. It...
5600633 Wireless telecommunication base station for integrated wireless services with ATM processing  
A wide variety of services both narrow band and broad band are provided to wireless stations both fixed and mobile by a flexible intelligent ATM base station. Such a base station provides two-way...
5592491 Wireless modem  
A system and method for communicating between local subscriber units and a local base station repeater cell in a two-way communication interactive video network. In one embodiment, a modem is used...
5546382 Communication method and communications control apparatus in circuit switching network  
A communication control unit connecting a terminal and a network temporarily disconnects a circuit of the network without ending a session, when no data is received from the network or when no data...
5534829 Antenna duplexer  
An object of the present invention is to improve the characteristics of the conventional antenna duplexer and to provide an antenna duplexer contributing to higher performance and smaller size of a...
5483531 Digital mobile radio network station with speech signal exchange means and data signal exchange means  
A mobile station of a mobile radio network includes speech exchange arrangements and data exchange arrangements. Selector arrangements select the speech exchange arrangements by default and change...
5477532 Radio transceiver  
A radio transceiver is disclosed in which an antenna is connected to a transmitter or a receiver through a duplexer. A controller is provided to control the switching operation of the duplexer so...
5473295 Saw notch filter for improving stop-band attenuation of a duplex filter  
When the bandwidth of a duplex filter having a certain band-width, intended for a radio telephone, is increased by affecting the coupling between the resonator circuits, the stop band of the filter...
5467065 Filter having resonators coupled by a saw filter and a duplex filter formed therefrom  
A filter, particularly suitable for radio frequency applications comprises a first filter which, in turn, comprises at least a pair of intercoupled resonators (RES1, RES2), and a SAW filter (SAW)...
5398258 Wireless communication system  
In the present invention a wireless communication system is disclosed. A base unit communicates with a remote unit. The system comprises means for transmitting, using CDMA, between the base unit...
5386435 Frequency hopping spread spectrum data communications system  
A frequency hopping spread spectrum wireless data communications network is disclosed. Time mark frames are transmitted by each base station at a regular cadence and each time mark frame contains...
5355390 Communication apparatus for transmitting and receiving communication signals through common transmission line  
A transmitting circuit is provided which includes a control circuit for transmitting and receiving a communication signal. Transmit information is modulated into a trapezoidal wave signal using a...
5319799 Signal oscillation method for time-division duplex radio transceiver and apparatus using the same  
A time-division duplex radio transceiver is disclosed which can avoid the deterioration of reception sensitivity and interferences in other radio communication equipments of the same kind which may...
5260989 Method and system for enhanced data transmission in a cellular telephone system  
A method and system for enhanced data transmission within a cellular telephone system having multiple assigned voice channels separated by adjacent buffer voice channels. A data processing terminal...
5231635 Multiplexed transmission system for subscriber units of different types  
A plurality of subscriber units are connected to at least two transceiver stations for exchanging information in a time division multiple access mode, in which traffic time intervals are allocated...
5020135 Computerized multistandard, field-convertible, multiregional/multiservice, remote controllable, remote programmable mobile two-way radio system with digital serial bus link, built-in programmer and autodiagnostics  
A Computerized Mobile Two-Way Radio System is provided having microprocessor enhanced capabilities and versatility for wide area/multiple region two-way radio networks with multiple categories of...
4980660 Antenna sharing apparatus for switchable transmit/receive filters  
Antenna sharing device used for a communications system such as a land mobile radiotelephone which has a transmitting frequency and a receiving frequency that are different from each other, and...
4965820 Cellular telephone apparatus  
A cellular telephone apparatus in which several functions such as decoding and encoding data signals, detecting the busy/idle bit and transponding the SAT signal, are carried out by a CMOS data...
4933770 Radio fax transmission  
Disclosed is an audio-to-radio and radio-to-audio signal converter and method for interfacing a facsimile machine with a radio transmitter-receiver having a microphone input, an audio output and a...
4910481 Branching filter  
A branching filter for separating or combining two different frequencies without interference in radio communication equipment etc. One or both of two filter blocks for separating or combining two...
4853657 Orthogonal-polarization duplex send-receive microwave head  
An orthogonal polarization duplex send-receive microwave head comprising an elongate housing (10) provided at one end (26) with a longitudinal bore (25) forming a first waveguide and with a...
4843621 Speakerphone using digitally compressed audio to detect acoustic feedback  
A mobile radiotelephone (120) includes a microcomputer (220), speakerphone control circuitry (106) and mobile radio (112). In the transmit voice path, speakerphone control circuitry (106) includes...
4792939 Duplex radio communication transceiver  
In order to reduce the size of a duplex radio communication transceiver such as a mobile telephone, this transceiver is constructed of a transmitting and receiving duplexer, a filter to be coupled...
4672601 Duplex interconnect/dispatch trunked radio system  
A dispatch trunked radio system which provides duplex or simplex telephone interconnect communications to subscriber units is described. The system allows duplex capable trunked system subscriber...
Matches 51 - 100 out of 147 < 1 2 3 >