| 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) |
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| 04/12/1994 | US5303400 Radio frequency receiver including dual receivers for increasing scanning speed |
| 04/12/1994 | US5303399 Radio receiver capable of indicating capital and small letters on a display |
| 04/12/1994 | US5303398 Stability detection method and apparatus for a tuning system |
| 04/12/1994 | US5303395 Power control with a constant gain amplifier for portable radio transceivers |
| 04/12/1994 | US5303394 Feedback stabilized Q multiplier filter circuit |
| 04/12/1994 | US5303346 Method of coding 32-kb/s audio signals |
| 04/12/1994 | US5303260 Method and circuit for compensating for oscillator drift in a spread-spectrum communication system |
| 04/12/1994 | US5303259 Frequency-hopped electronic signal transmitter |
| 04/12/1994 | US5303258 Spread spectrum communications system |
| 04/12/1994 | US5303257 Carrier frequency correction for a DSSS communication system |
| 04/12/1994 | US5303226 Reception of TDMA digital data signal with compensation for channel variations |
| 04/12/1994 | US5302914 Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems |
| 04/07/1994 | DE4316297C1 Audio signal frequency analysis method - using window functions to provide sample signal blocks subjected to Fourier analysis to obtain respective coefficients. |
| 04/07/1994 | DE4220228A1 Narrow band interference suppression circuit with controlled oscillator - offsets intermediate-frequency signals by amt. dependent on frequency of interfering signal before application to notch filter |
| 04/07/1994 | CA2569056A1 Wireless debit card system and method |
| 04/06/1994 | EP0590952A2 Radio paging receiver using an air battery |
| 04/06/1994 | EP0590888A1 Power booster for a portable radio telephone |
| 04/06/1994 | EP0590590A1 Transponder systems for automatic identification purposes |
| 04/06/1994 | EP0590534A1 Portable radio unit |
| 04/06/1994 | EP0590298A2 Synchronisation procedure of a receiver for the reception of a data signal spread by a PN-code |
| 04/06/1994 | EP0590252A1 Mobile radio systems |
| 04/06/1994 | CN2161022Y Electric power line FM carrier intercom |
| 04/06/1994 | CN1085037A Radio frequency modulatng transmitter |
| 04/06/1994 | CN1085027A Multiple cavity tuning of a transmitter output in a communication system |
| 04/06/1994 | CN1085003A Method and apparatus for timing video recording with character inputting |
| 04/05/1994 | US5301369 Circuit with adjustable release time |
| 04/05/1994 | US5301368 System for controlling operations of GPS receiver unit and radio telephone unit for automotive vehicle |
| 04/05/1994 | US5301367 Direct digital synthesizer for producing a modulated intermediate frequency in a radio apparatus |
| 04/05/1994 | US5301366 High performance frequency tuning with low cost synthesizer |
| 04/05/1994 | US5301364 Method and apparatus for digital automatic gain control in a receiver |
| 04/05/1994 | US5301361 Low parts count transmitter unit |
| 04/05/1994 | US5301360 Communication device |
| 04/05/1994 | US5301358 Automatic antenna tuning method and apparatus |
| 04/05/1994 | US5301352 Satellite broadcast receiving system and change-over divider for use in same |
| 04/05/1994 | US5301255 Audio signal subband encoder |
| 04/05/1994 | US5301225 Method and system for dynamically regulating a power saving period within a radio telecommunication system |
| 04/05/1994 | US5301206 Spread spectrum communication system |
| 04/05/1994 | US5301205 Apparatus and method for data compression using signal-weighted quantizing bit allocation |
| 04/05/1994 | US5300935 Antenna controlling apparatus and method thereof |
| 04/05/1994 | US5300900 High-frequency limiter and switch-limiter circuit having improved recovery time |
| 04/05/1994 | US5300894 Circuitry for minimizing peak power in an amplifier carrying a plurality of signals of differing frequencies |
| 04/05/1994 | US5300875 Passive (non-contact) recharging of secondary battery cell(s) powering RFID transponder tags |
| 04/05/1994 | US5300838 Agile bandpass filter |
| 04/05/1994 | US5300826 Interface circuit for audio signal |
| 04/05/1994 | US5300820 Input interface circuit for removing noise components of an input signal |
| 03/31/1994 | WO1994007314A1 Method for synchronising transmitter frequencies in common wave digital audio broadcast |
| 03/31/1994 | WO1994007237A1 Audio compression system employing multi-rate signal analysis |
| 03/31/1994 | CA2100816A1 Mobile radio systems |
| 03/30/1994 | EP0589709A2 Multiresolution transmission system |
| 03/30/1994 | EP0589683A1 Method for frequency comb spread spectrum modulation |
| 03/30/1994 | EP0589574A1 An amplifier control system |
| 03/30/1994 | EP0589140A2 Bit allocation method in subband coding |
| 03/30/1994 | EP0588932A1 Variable rate vocoder |
| 03/30/1994 | EP0588884A1 A method and an apparatus for determining phase and frequency deviation. |
| 03/30/1994 | EP0386029B1 Demodulation method |
| 03/30/1994 | CN1084686A Method and apparatus of inserting sound signal into synchronous and compressed data signal |
| 03/30/1994 | CA2079403A1 Universal support for portable telephone |
| 03/29/1994 | US5299293 Protection arrangement for an optical transmitter/receiver device |
| 03/29/1994 | US5299265 System for supplying power to a detachable grille of a car stereo |
| 03/29/1994 | US5299264 System for short-range transmission of signals over the air using a high frequency carrier |
| 03/29/1994 | US5299233 Apparatus and method for attenuating a received signal in response to presence of noise |
| 03/29/1994 | US5299229 High rate-low rate PN code tracking system |
| 03/29/1994 | US5299228 Method and apparatus of reducing power consumption in a CDMA communication unit |
| 03/29/1994 | US5299226 Adaptive power control for a spread spectrum communications system and method |
| 03/29/1994 | US5299117 Power conserving receiver operation for a remote electronic display system |
| 03/29/1994 | US5299024 Method and apparatus for broadcasting and receiving broadcasted information |
| 03/29/1994 | US5298883 Proximity alert system |
| 03/29/1994 | CA2011068C Hot cut procedure for telecommunications network |
| 03/29/1994 | CA2002389C Radio transceiver |
| 03/24/1994 | DE4331543A1 IR remote controlling for TV and audio equipment - storing remote control signals according to formats in relevant IR signal receiver |
| 03/24/1994 | CA2105027A1 Amplifier control system |
| 03/23/1994 | EP0588424A1 Buest control in a power amplifier for a TDMA communication system |
| 03/23/1994 | EP0588423A2 Control bus for multi-component consumer electronics system |
| 03/23/1994 | EP0587962A1 Method and circuit for implementing an impedance, in particular for D.C. telephonic applications |
| 03/23/1994 | EP0587886A1 A method for tuning an rf bandpass filter. |
| 03/23/1994 | EP0587801A1 Signal transmission and tag power consumption measurement circuit for an inductive reader |
| 03/23/1994 | EP0587792A1 Battery saver for a communication device |
| 03/23/1994 | EP0587761A1 Portable radio battery latch |
| 03/23/1994 | EP0587760A1 Radio with fast lock phase-locked loop |
| 03/23/1994 | EP0587733A1 Low computational-complexity digital filter bank. |
| 03/23/1994 | EP0587626A1 Process for the radio transmission of a control signal varying in time and radio receiver for receiving such a control signal. |
| 03/23/1994 | EP0451232B1 Code acquisition method and circuit for a spread spectrum signal receiver |
| 03/23/1994 | EP0253902B1 Noise reduction apparatus and method |
| 03/23/1994 | CN2159631Y Frequency hopping following receiver |
| 03/22/1994 | US5297236 Low computational-complexity digital filter bank for encoder, decoder, and encoder/decoder |
| 03/22/1994 | US5297211 Acoustic device for custom installation |
| 03/22/1994 | US5297162 System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system |
| 03/22/1994 | US5297161 Method and apparatus for power estimation in an orthogonal coded communication system |
| 03/22/1994 | US5296931 Channel selecting method for programs of the same category |
| 03/22/1994 | US5296761 Temperature-compensated logarithmic detector having a wide dynamic range |
| 03/22/1994 | US5295867 Edge connector shield |
| 03/21/1994 | EP0586548A4 Radio frequency error detection and correction system. |
| 03/17/1994 | WO1994006229A1 Adaptive threshold in a spread spectrum communications system |
| 03/17/1994 | WO1994006228A1 Adaptive data recovery for spread spectrum systems |
| 03/17/1994 | WO1994006223A1 A noise matching network |
| 03/17/1994 | WO1994006215A1 Communication device connected to an interface circuit employing opto-isolators |
| 03/17/1994 | WO1994006214A1 Data transfer method and apparatus having dual frequency operation |
| 03/17/1994 | WO1994006213A1 Radio receiver |
| 03/17/1994 | WO1994006212A1 A radio housing assembly with a plugable control module |
| 03/17/1994 | WO1993016561A3 Channel selection switching |