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7583930 |
Transmission device, electric field communication transceiver, and electric field communication system
There is provided a transmission means ( 3 ) configured to transmit a modulated signal obtained by modulating data, a transmission electrode ( 8 ) that induces an electric field based on the...
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7577411 |
Mobile station access and idle state antenna tuning systems and methods
Wireless communication device tuning an antenna matching circuit responsive to a receive signal quality indicator and, optionally, responsive to a failed access probe is provided. Systems and...
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7548762 |
Method for tuning a GPS antenna matching network
A system and method is provided for tuning a Global Positioning System (GPS) antenna matching circuit in a portable wireless communications device. The method includes accepting a first matching...
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7535974 |
Method and apparatus for amplifier linearization using adaptive predistortion
A system configured to linearize a response of a nonlinear amplifier comprises a buffer to store a plurality of samples of an input signal to be amplified by the nonlinear amplifier. A...
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7535312 |
Adaptive impedance matching apparatus, system and method with improved dynamic range
An embodiment of the present invention provides an apparatus, comprising an RF matching network connected to at least one RF input port and at least one RF output port and including one or more...
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7509100 |
Antenna interface unit
A ferro-electric (FE) tunable antenna matching circuit is provided for a multi-band antenna. The tunable matching circuit is integrated with a diplexer on one substrate. The tunable matching...
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7483680 |
Method and apparatus for modulation path delay mismatch compensation in a polar modulation transmitter
A polar modulation transmitter offers a split architecture for determining amplitude modulation path delay of the transmitter and comprises a split supply modulation circuit and a split power...
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RE40620 |
Fully integrated All-CMOS AM transmitter with automatic antenna tuning
A monolithic AM transmitter is disclosed. An external antenna forms part of a resonance network so that the antenna resonance point is automatically tuned to the transmit frequency. This provides...
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7437139 |
Method and apparatus for calibrating filtering of a transceiver
A method and apparatus of calibrating filtering of receive and transmit signals is disclosed. The method of calibrating filtering of a received signal includes injecting an LO signal. The injected...
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7409196 |
RFIC transmit power control
An RFIC transmitter includes a digital transmit processing module, a digital to analog converter, a filter and gain module, an up-conversion module, a power amplifier, and a transmit signal...
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7394880 |
Method and apparatus for simulating radio channel
A radio channel simulator configured to read radio channel data describing a radio channel and user data including at least one user signal, and to simulate the radio channel using a FIR filter...
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7379715 |
Transmitter apparatus and method using polar modulation with signal timing adjustment
A transmitting apparatus includes a polar signal producing circuit which produces signals corresponding to the amplitude and the phase of a transmitting modulated wave from an input signal and...
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7379714 |
Method and apparatus for dynamically adjusting a transmitter's impedance
A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance...
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7263338 |
Device and method for regulating a transmission moment of a continuous transmission signal
A comparator unit is used to compare an actual transmission time signal with a nominal transmission time signal and to produce a difference signal from the discrepancy, from which difference signal...
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7190933 |
Method and apparatus for automatic tuning of a resonant loop antenna in a transceiver circuit
Disclosed is a circuit and method for automatic tuning of a resonant circuit in a transceiver having a receiver and a transmitter that includes a power amplifier for driving the resonant circuit....
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7184720 |
Method and device for simulating radio channel
The invention relates to a method and device for performing channel simulation, the device comprising a set of channel simulation units ( 200 to 214 ) for simulating a radio channel, each unit...
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7174147 |
Bandpass filter with tunable resonator
A tunable bandpass filter is provided that comprises a first shunt-connected ferroelectric (FE) tunable tank circuit having a first node to accept an input signal. A second shunt-connected FE...
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7171168 |
Ramp signal with boost portion preceding a time slot
A transmitter includes a power amplifier which is capable of both linear and non-linear operation, controlled by first and second control loops. A power controller includes a capacitive component,...
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7145413 |
Programmable impedance matching circuit and method
As disclosed herein, a microelectronic circuit and method are provided for improving signal integrity at a transmission line. The circuit includes a programmably adjustable impedance matching...
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7127217 |
On-chip calibration signal generation for tunable filters for RF communications and associated methods
On-chip calibration signal generation circuitry is disclosed for filter tuning for radio-frequency communications and associated methods. On-chip circuitry generates a calibration signal that is...
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7116950 |
Direct-conversion transmitting circuit and integrated transmitting/receiving circuit
A transmitter is provided which includes a transmitting circuit that does not require a high-performance low noise VCO restricting cost reduction thereof and that can reduce the number of parts...
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7110727 |
Methods for determining the gains of different carriers, radio transmission units and modules for such units
The invention relates to methods for determining the separate radio frequency gains for carriers in a multi-carrier transmitter of a radio transmission unit of a radio communications system. In...
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7107027 |
Distributed transmitter automatic gain control
Automatic gain control (AGC) functionality is distributed within a transmitter chain. A controller manages two or more variable gain amplifiers to achieve the desired result.
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7107026 |
Automatic matching and tuning unit
An automatic matching and tuning unit (AMTU), which connects the output from a low or medium frequency, high power radio transmitter, which requires a 50 ohm terminating impedance, to an antenna...
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7092685 |
Method for tuning a radio filter and a system for tuning a radio filter
The present invention relates to a method and a system for tuning a radio filter. The radio filter comprises at least one resonator module, each of said at least one resonator module having a...
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7058412 |
Combined advertising and entertainment system network
A wireless remote unit is operable to demodulate signals received over a plurality of different bands, such as the FM broadcast band, and one or more higher frequency bands. The various bands have...
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7058372 |
Method and apparatus for automatic tuning of a resonant loop antenna
Disclosed is a circuit and method for continuous automatic tuning of a resonant circuit. A resonance voltage of the resonant circuit is phase shifted by a predetermined phase shift Φ degrees and...
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7039385 |
Method and apparatus for automatic center frequency tuning of tunable bandpass filters
A radio has a tunable bandpass filter that is tuned by apparatus within the radio. A reference generator generates a reference signal for use in tuning the tunable bandpass filter. The tunable...
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7023293 |
Method for tuning a radio filter, a radio filter and a system comprising such a radio filter
The present invention relates to a method for tuning a radio filter. The filter comprises an input connection, an output connection and at least two resonator modules coupled in cascade, each...
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7005941 |
High-frequency coupler
A high-frequency coupler for extracting a secondary signal representative of a main signal carried by a conductive line, including two series-coupled, respectively high-pass and low-pass, filters,...
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6980776 |
Transceiver apparatus
The present invention provides a transceiver apparatus that permits miniaturization even when the antenna thereof is an unbalanced circuit and the transmitter circuit section and receiver circuit...
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6952565 |
Communication terminal, automobile communication terminal, and automobile
The present invention provides a communication terminal that enables precise communications with optimum receive sensitivity at any time regardless of any change in peripheral environments of an...
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6906684 |
Controlling a telescopic antenna mast
A receiver receives an electromagnetic signal via an antenna mounted on an antenna mast. A signal evaluator determines or measures a signal quality level associated with the received...
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6898419 |
Remotely adjustable bandpass filter
Remotely controllable actuators are provided to alter the cavity size of bandpass cavity filters to alter the bandpass characteristics. In one embodiment, a stepper motor is used to provide lateral...
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6868135 |
Method and apparatus for correcting for a phase shift between a transmitter and a receiver
A method and apparatus for correcting for a phase shift between a transmitter and receiver comprising the steps of:
a) transmitting a signal from a transmitter ( 14 ); b) receiving the...
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6850754 |
Information processing apparatus and clock control method
An information processing apparatus, comprising a wireless module which performs wireless communication, the wireless module being detachably mounted, a frequency circuit which generates a...
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6766152 |
Signal treating circuit with a class A/B output stage connectable to a source of multiple supply voltages
An A/B class output stage of a signal treating circuit, such as for example a mobile telephone, a radio car kit, other portable equipment, etc. treats a signal. The A/B class output stage drives a...
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6766150 |
System and method for tuning a narrowband cavity filter used in a CDMA transmitter
There is disclosed a system for tuning a tunable narrowband cavity filter in a base station transmitter of a wireless network. The radio frequency (RF) transmitter comprises: 1) modulation...
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6725021 |
Method for tuning an envelope tracking amplification system
An optimal operating point of an envelope tracking amplification system that includes a radio frequency (RF) power amplifier having an RF amplifying element is determined based on an application to...
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6650869 |
System and method for managing return channel bandwidth in a two-way satellite system
A system for managing return channel bandwidth in a two-way satellite communication network is disclosed. A plurality of transceivers are configured to transmit backlog information over a return...
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6631268 |
Data transmission method and radio system
The invention relates to a data transmission method and a radio system, which comprises a plurality of transceivers ( 100, 108 to 112 ) that are arranged to intercommunicate by using a plurality...
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6631265 |
Apparatus and methods for tuning bandpass filters
A signal having a substantially uniform spectral distribution, e.g., a flat noise signal such as a signal ground, is provided at the input of a bandpass filter such as an IF filter of a receiver...
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6580900 |
Tuning arrangement
A tuning arrangement tunes a resonance module for wireless applications, e.g., wireless communication for a base station for mobile telephony system. The input and the output power signals of the...
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6421533 |
Method and apparatus for controlling the envelope of a radio signal
A method of controlling the envelope of a radio signal to be transmitted from a station for mobile radio communications, said radio signal being output by a field effect power amplifier. The method...
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6347222 |
Tuning method and transceiver unit
The invention relates to a tuning method used in a base station which comprises, in addition to at least one transceiver unit generating signals, a filtering means which is separate from the...
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6160460 |
Self-tuning resonant cavity filter
In one form of the invention, a resonant cavity filter (50) is disclosed, comprising an input port (210) for receiving an input signal, a dielectric resonator (204) in a cavity, the dielectric...
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6148217 |
Method for adjusting the gain of an antenna system
The present invention discloses a method for quickly and easily adjusting the gain of an antenna system. According to an exemplary embodiment of the present invention, the output power of the base...
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6128541 |
Optimal auto-tuner for use in a process control network
A device and method that automatically tune a valve controller coupled to a process control loop generate a plurality of sets of tuning parameters for use by the controller, deliver a test signal,...
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6069538 |
Impedance stabilizing unit and high-frequency module using the unit
An impedance stabilizing unit including an input port; an output port connected to the input unit; an inductance matching circuit connected to ground and at least one of the input port and the...
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6058294 |
Adjustable frequency stabilizing internal chip capacitor system
A transmitter system having an adjustable monolithic frequency stabilization and tuning internal capacitor circuit. The transmitter system has a transmitter for generating and transmitting a...
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