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| Number | Title | Issue Date |
| 8170516 | Method for the digital compensation of nonlinearities in a communication system and receiver device A method for digital compensation of nonlinearities in a communication system that includes a transmitter, a transmission channel and a receiver, including: estimating the nonlinearities induced by the transmitter and/or the receiver, from at least one learning sequ... | 05/01/2012 |
| 7555274 | Radio receiver and radio receiving method A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback cont... | 06/30/2009 |
| 7515890 | Radio receiver and radio receiving method A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback cont... | 04/07/2009 |
| 7433662 | Mixer gain control with gain tracking offsets An apparatus and method to use a gain control network across source terminals of cascode transistors that drive a differential current to control gain. The drains of the cascode transistors are coupled to a load such as a mixer. The cascode arrangement provides high... | 10/07/2008 |
| 7409018 | Automatic gain controller outputting control value varying nonlinearly, and a method of outputting a gain control signal thereof An automatic gain controller having an estimator to estimate the level of an input signal, a subtractor to calculate a difference between the level estimated by the estimator and a predetermined reference value, a gain controller to output a control value achieved b... | 08/05/2008 |
| 7398066 | Communication system control using reliability data A method and apparatus for recovering a data symbol from a communication signal in which the communication signal is processed to produce a baseband waveform that is then sampled to obtain a channel sequence. The channel sequence is decoded to obtain an estimate of ... | 07/08/2008 |
| 7386285 | Automatic gain control adaptive for plural modulation schemes An AGC circuit controls LNA and VGA amplifiers such that a received signal is converted at a high speed with tracking errors prevented according to each modulation scheme. The AGC circuit generates LNA and VGA control signals controlling the LNA and VGA amplifiers, ... | 06/10/2008 |
| 7369826 | Method for monitoring broadcast signals at alternative frequencies and gain control unit Many broadcast stations transmit their programs via a variety of different frequencies. The invention relates to monitoring alternative frequencies during the reception of a broadcast signal at a present frequency. Whenever the broadcast signal at an alternative fre... | 05/06/2008 |
| 7324615 | Time signal receiver and decoder A time signal receiver and decoder receives, detects and stores time information from time signals, e.g., WWV, WWVH, WWVB (USA), JJY (Japan), MSF (UK) and the like. The time information may be used for a self setting clock, and the clock may be used as a reference i... | 01/29/2008 |
| 7319884 | FM radio device and transmission power control method A transmission power control method includes a step (a) of receiving by a receiver a radio wave signal, a step (b) of judging whether a first identification signal is included in the received radio wave signal, a step (c) of detecting a reception electric field inte... | 01/15/2008 |
| 7313374 | Low-latency DC compensation A method of performing DC estimation and correction in the presence of an automatic gain control function introduces no long-term delay of the signal. When the automatic gain control function indicates that it has altered the gain or when an initial DC estimate is r... | 12/25/2007 |
| 7305218 | RF switch An RF switch is disclosed. Power of an amplifier installed in an RF switch of a TV receiver is adjusted by using a Schmitt trigger circuit. If an output voltage of an RF automatic gain controller of a tuner is greater than a pre-set upper limit threshold value, the ... | 12/04/2007 |
| 7302022 | Automatic gain control device and method in orthogonal frequency division multiplexing system with DC offset compensation function, and recording medium storing program containing the method Disclosed is an AGC (automatic gain control) device and method of an OFDM system with a DC offset compensation function, and a recording medium storing a program including the method. The AGC device calculates an energy of input signals with DC offsets as the summat... | 11/27/2007 |
| 7271852 | Digital television receiver with automatic gain control unit and method An automatic gain controller (AGC) and method for use in a digital TV receiver having an IF amplifier, an RF amplifier, an analog to digital converter (ADC) connected to the IF amplifier, and a demodulator connected to the ADC, the AGC comprising: an input selector ... | 09/18/2007 |
| 7266345 | System and method for receiving broad-band signals A system and a method for receiving and processing broad-band signals in a software defined radio (SDR) terminal are provided. The system comprises first and second frequency pass units and an analog to digital signal converter (A/D converter). The first frequency p... | 09/04/2007 |
| 7239856 | Apparatus and method for compensating gain of an automatic gain controller An apparatus and method for compensating the gain of an Automatic Gain Controller (AGC) for stabilizing the reception power of discontinuously transmitted packet data in a mobile communication system are disclosed. A compensation controller receives an AGC value fro... | 07/03/2007 |
| 7228109 | DC offset reduction in radio-frequency apparatus and associated methods A radio-frequency receiver circuitry includes a down-converter circuitry, an analog-to-digital converter circuitry, and a DC offset reduction circuitry. The down-converter circuitry accepts a received radio-frequency signal and processes the radio-frequency signal t... | 06/05/2007 |
| 7209723 | Direct conversion circuit having reduced bit errors A direct conversion circuit includes first and second mixers to which a radio frequency signal is input. An oscillator supplies the first and second mixers with local oscillation signals whose phases are orthogonal to each other. A baseband processing circuit proces... | 04/24/2007 |
| 7139542 | Method and apparatus for compensating DC level in an adaptive radio receiver A radio frequency receiver 30, 32, includes a first component block 12, 16, 18, 20; a second compensating component block 22, 22a–22b, 34; and control circuitry 26 operable for controlling the state (e.g., load, bia... | 11/21/2006 |
| 7133527 | Stereodecoder An arrangement for decoding a stereo multiplex signal, comprising a baseband sum signal (L+R), a difference signal (L−R) which is amplitude-modulated on a suppressed sub-carrier and a pilot signal having a frequency located between the frequency bands of said sum ... | 11/07/2006 |
| 7130602 | Dynamically programmable receiver Disclosed is a novel and improved dynamically programmable linear receiver which provides the required level of system performance with reduced power consumption. In one embodiment, disclosed is a programmable receiver coupled to a jammer detector for detecting the ... | 10/31/2006 |
| 7120410 | LNA gain adjustment in an RF receiver to compensate for intermodulation interference A Radio Frequency (RF) receiver includes a low noise amplifier (LNA) and a mixer coupled to the output of the LNA. The gain of the LNA is adjusted to maximize signal-to-noise ratio of the mixer and to force the mixer to operate well within its linear region when an ... | 10/10/2006 |
| 7116955 | Dual loop automatic gain control An AGC circuit includes both wide-band and narrow-band VGAs. Two power monitors monitor the power level of the two VGAs. Based upon the signals provided by the power monitors, the AGC circuit derives two error terms. The AGC circuit filters and combines the error te... | 10/03/2006 |
| 7106808 | Tuner of the type having zero intermediate frequency and corresponding control process A tuner includes an analog block, a digital block, and an analog/digital conversion stage connected therebetween. The analog block includes a first attenuator/controlled-gain amplifier stage connected upstream to a frequency transposition stage. The overall mean pow... | 09/12/2006 |
| 7099641 | Receiver circuit for mobile radio receivers with automatic gain control A receiver circuit for a mobile radio receiver has a controllable amplifier with a variable gain level, an analog-digital converter stage, a digital filter configuration for the purpose of channel selection and a signal strength estimator. The signal strength estima... | 08/29/2006 |
| 7092706 | Apparatus and method for signal strength compensation of highly time-variant mobile radio channels and reception unit for mobile radio transmission A signal strength compensation unit for mobile radio receivers is connected upstream of the channel estimator and the channel equalizer and compensates for, in particular, the great, brief signal strength fluctuations within a data burst. Likewise, a method for sign... | 08/15/2006 |
| 7088693 | Adaptive diversity combining for Wide Band Code Division Multiple Access (W-CDMA) based on iterative channel estimation The present invention provides a method for adaptive diversity combining for Wide Band Code Division Multiple Access (W-CDMA) comprising: splitting multi-path interference into Iknown and Iunknown components, | 08/08/2006 |
| 7079595 | Radio receiver having direct DC offset compensation An FM radio receiver includes a low noise amplifier, down conversion mixing module, local oscillation module, bandpass filter, demodulation module, and a DC offset estimation module. The low noise amplifier, the down conversion mixing module, the bandpass filter, an... | 07/18/2006 |
| 7079707 | System and method for horizon correction within images The present invention includes a system and method for the correction of user induced inadvertent orientation errors in captured digital images before the digital image is saved to a storage media or memory. A system of the present invention checks a user-selectable... | 07/18/2006 |
| 7068987 | Packet acquisition and channel tracking for a wireless communication device configured in a zero intermediate frequency architecture A method of controlling operation of a wireless device configured in a zero intermediate frequency architecture including a DC loop and a gain loop. The method includes processing energy in a wireless medium to generate a corresponding receive signal, monitoring the... | 06/27/2006 |
| 7068988 | Radio reception apparatus, signal processing timing control method, and signal processing timing control program In a radio reception apparatus, a variable gain of a reception amplifier is adjusted by an AGC control unit for each frame of a received signal for execution of an AGC operation. The AGC control unit determines and indicates to a digital signal processing unit an AG... | 06/27/2006 |
| 7058371 | Mechanism for modulating wireless communication signals A modulating mechanism is provided comprising a first storage and a corresponding first DAC, and a second storage and a corresponding second DAC. The first storage stores an adjusted digital representation of a first waveform, while the second storage stores an adju... | 06/06/2006 |
| 7054605 | Variable-gain low noise amplifier to reduce linearity requirements on a radio receiver Variable gain low noise amplifier (LNA) system to reduce linearity requirements on a radio receiver. In the receiver, the LNA is coupled to receive an RF signal and produce an amplified signal at an LNA output. The receiver also comprises a VGA coupled to the LNA ou... | 05/30/2006 |
| 7046749 | Narrowband gain control of receiver with digital post filtering An Automatic Gain Control (AGC) circuit as used in a digital receiver that utilizes a main loop filter that is of a relatively wide bandwidth. A pre-filter, wideband variance is determined from the input digital signal, and a post-filter, narrowband variance is also... | 05/16/2006 |
| 7042292 | Gain control circuit, and a radio communication apparatus using the same A gain control circuit comprises a variable gain circuit having a predetermined gain control range and a control voltage supply circuit for supplying an internal control voltage to the variable gain circuit as a gain control signal. In this gain control circuit, the... | 05/09/2006 |
| 7039376 | AGC amplifier circuit for use in a digital satellite broadcast receiver apparatus An AGC amplifier circuit has a fixed-gain amplifier, of which the gain is not controlled by an AGC voltage, and a variable-gain amplifier, of which the gain is controlled by the AGC voltage, that are connected in parallel. When the AGC voltage is within a predetermi... | 05/02/2006 |
| 7024221 | Notch filter for DC offset reduction in radio-frequency apparatus and associated methods A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry coupled together. The receiver analog circuitry receives an RF signal. The receiver analog circuitry processes the received RF signal and generates a digital signal... | 04/04/2006 |
| 7015758 | Gain control circuit, and a radio communication apparatus using the same A gain control circuit comprises a variable gain circuit having a predetermined gain control range and a control voltage supply circuit for supplying an internal control voltage to the variable gain circuit as a gain control signal. In this gain control circuit, the... | 03/21/2006 |
| 6992954 | Method for determining DC level of AC signal and DC offset of the same A method for determining a direct current (DC) level involved in an alternating current signal is provided. The alternating current signal is transmitted from an amplifier to an A/D (analog-to-digital) converter. When any of the extreme values of the alternating cur... | 01/31/2006 |
| 6993305 | AM receiver with audio filtering means An AM receiver includes an audio filter that is configured to selectively narrow the audio bandwidth of the demodulated signal when a signal with a low signal-to-noise ratio is received. By suitably bandpass-filtering the signal, for example, to 200–5000 Hertz, th... | 01/31/2006 |
