Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission
Patents for H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission (188,568)
02/1998
02/17/1998US5718104 Carrying case for hand-held transceiver
02/17/1998CA2075754C Method of coding 32-kb/s audio signals
02/15/1998CA2187977A1 System for reducing interference to electronic devices caused by discontinuous transmission radio transmitters
02/12/1998WO1998006210A1 Mobile telephone with additonal functions
02/12/1998WO1998006205A1 A method and a device for broadband transmission
02/12/1998WO1998006195A1 Method and apparatus for echo data hiding in audio signals
02/12/1998WO1998006190A1 Packet-switched spread-spectrum system
02/12/1998WO1998006183A1 Remote control for a mobile station
02/12/1998WO1998006182A1 Selective recall and preservation of continuously recorded data
02/12/1998WO1998006174A1 High-frequency integrated circuit for high-frequency radio transmitter-receiver suppressed in influence of high-frequency power leakage
02/12/1998WO1998005532A1 Electronic accessory for a motor vehicle, in particular for a car radio, comprising a key card
02/12/1998WO1997049212A3 Apparatus and method of determining symbol rate and a carrier frequency
02/12/1998DE19734026A1 Television tuner blocking circuit
02/12/1998DE19631591A1 Elektronisches Zusatzgerät für ein Automobil, insbesondere Auto-Rundfunkgerät, mit einer Schlüsselkarte Electronic accessory for an automobile, especially car radio, with a key card
02/12/1998CA2261928A1 Selective recall and preservation of continuously recorded data
02/11/1998EP0823801A2 Clock distribution via suppressed carrier to reduce EMI
02/11/1998EP0823796A2 Multiuser receiving device for use in a CDMA communications system
02/11/1998EP0823795A2 Path-diversity method and system for spread spectrum receivers
02/11/1998EP0823793A2 Mobile communication system and apparatus with transmission power control
02/11/1998EP0823792A2 Audio signal processing circuit
02/11/1998EP0823791A2 Transmitting and receiving apparatus
02/11/1998EP0823790A2 Dual band mobile station employing cross-connected transmitter and receiver circuits
02/11/1998EP0823789A2 Multi-frequency wireless communication device
02/11/1998EP0823788A2 Receiving mixer circuit for mobile radio transceiver designed to operate with multiple modulation modes and multiple frequency bands
02/11/1998EP0823751A2 Antenna switching circuits for radio telephones
02/11/1998EP0823745A2 Multipole multiposition microwave switch with a common redundancy
02/11/1998EP0823183A1 Battery-powered radio transceiver with improved battery life and method of operation
02/11/1998EP0823152A1 Full duplex ultrawide-band communication system and method
02/11/1998EP0823151A1 Antenna guided power control
02/11/1998EP0823150A1 Super low noise multicoupler
02/11/1998EP0823145A1 Tunable interstage filter
02/11/1998EP0823059A1 Interrogator for electronic identification system
02/11/1998EP0772952A4 An audio interface garment and communication system for use therewith
02/11/1998CN2274395Y Radio receiver for stereo television set
02/11/1998CN1173266A Method and apparatus for providing redundant radio coverage within a vellular communication system
02/11/1998CN1173254A Data transmission method, transmitter and receriver
02/11/1998CN1173101A Dual-mode cellular telephone system
02/11/1998CN1173086A Dialogic style RF guidance system for visually handicapped person and its control method
02/11/1998CN1173083A Improved double change type wireless transmit-receive system
02/11/1998CN1173082A Intermittent receiving apparatus capable of reducing current consumption
02/11/1998CN1173054A Balun transformer
02/10/1998US5717821 Method, apparatus and recording medium for coding of separated tone and noise characteristic spectral components of an acoustic sibnal
02/10/1998US5717764 Global masking thresholding for use in perceptual coding
02/10/1998US5717736 Testing circuit and method for a codec hybrid balance network
02/10/1998US5717726 Digital filter
02/10/1998US5717719 Digital radio transmission-reception apparatus
02/10/1998US5717718 Multipoint to point radiocommunications network
02/10/1998US5717717 Device and method for adaptive narrow band interference suppression in multiple-access communications
02/10/1998US5717713 Technique to permit rapid acquisition and alert channel signalling for base station-to-user link of an orthogonal CDMA (OCDMA) communication system
02/10/1998US5717688 Wireless local area network with roaming indicating multiple communication ranges
02/10/1998US5717558 Electrostatic discharge protection for an electrical device
02/10/1998US5717368 Varactor tuned helical resonator for use with duplex filter
02/10/1998US5717356 Switching circuit
02/10/1998US5717307 Apparatus and method for identifying the type and brand of a battery for a portable device
02/10/1998US5716730 Battery case mounting structure for electronic equipment
02/10/1998US5716230 Surface engageable electrical connector
02/10/1998CA2087889C Sound multiplex broadcast receiver and method of controlling display thereof
02/10/1998CA2084341C Redundancy system switching control system
02/10/1998CA2058191C Arrangement and method for detecting interference in tdma communications system
02/05/1998WO1998005148A1 Wristwatchlike telephone set
02/05/1998WO1998005147A1 Method and apparatus for receiving a signal in a digital radio frequency communication system
02/05/1998WO1998005141A1 Method and apparatus for receiving a signal in a digital radio frequency communication system
02/05/1998WO1998005136A2 Radio receiver with a memory for transmission frequencies and codes associated to said frequencies
02/05/1998WO1998005128A1 Coherent signal processing for cdma communication system
02/05/1998WO1998005127A1 Linearizing the transmitter of a mobile station
02/05/1998WO1997049199A3 Transmitter diversity assembly and associated method for radio transmitter
02/05/1998WO1997049140A3 Integrated filter
02/05/1998WO1997039543A3 Link delay calculation system for a radio repeater system
02/05/1998DE19733179A1 Data receiver transmitter for road vehicle navigation system
02/05/1998DE19648418A1 Decentralised subscriber switching system for antenna terminals
02/05/1998DE19631099A1 Radiation protection device for mobile telephone user e.g. for shielding against communication signal emissions
02/05/1998DE19630578A1 Rundfunkempfänger Broadcast radio receiver
02/05/1998CA2260918A1 Method and apparatus for receiving a signal in a digital radio frequency communication system
02/04/1998EP0822718A1 Network controller for cable television delivery systems
02/04/1998EP0822696A2 Data logging system employing M(N+1) redundancy
02/04/1998EP0822669A2 Digital asynchronous spread spectrum receiver
02/04/1998EP0822668A2 Spread spectrum receiving apparatus
02/04/1998EP0822655A2 Improved low noise block downconverter
02/04/1998EP0821851A1 Broadcast system with associated data transmission capabilities
02/04/1998EP0821849A1 Reduced complexity signal transmission system
02/04/1998EP0821848A1 Reduced complexity signal transmission system
02/04/1998EP0821796A1 Radio-interrogatable sensor using surface wave technology
02/04/1998EP0631493B1 Bone fixation system
02/04/1998EP0610313B1 Radio transmission system and radio receiver
02/04/1998EP0546088B1 Frequency modulated synthesizer using low frequency offset mixed vco
02/04/1998CN2273923Y Device for generating broadcast time alarming carried code and the receiver therewith
02/04/1998CN1172566A Multiple access digital transmitter and receiver
02/04/1998CN1172562A Transmission system for non-linear transmission medium
02/04/1998CN1172561A Receiver circuit
02/04/1998CN1172422A Noise cancellation apparatus
02/04/1998CN1172409A Mobile unit communication apparatus having digital and analog communication modes and method of controlling the same
02/04/1998CN1172407A Radio channel initial transmission scheme for mobile communication system
02/04/1998CN1172385A Multi-functional portable electronic transceiver
02/04/1998CN1172384A Temperature compensated wide dynamic range power detection circuitry for portable RF transmission terminals
02/04/1998CN1172355A Bidirectional-use charging battary combined structure
02/03/1998US5715531 Synchronous tracking filter circuit for a broadcast satellite tuner
02/03/1998US5715530 Method for reducing spurious reception locations in homodyne receivers with time-variant carrier frequency
02/03/1998US5715529 FM receiver including a phase-quadrature polyphase if filter
02/03/1998US5715525 Radio frequency circuit for portable radion communication device
02/03/1998US5715524 Radio communication device with movable housing element control
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