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| Number | Title | Issue Date |
| 7103027 | Random access channel preamble detection A preamble for a random access channel (RACH) transmission is provided by selecting one out of sixteen preamble signatures. Each of the sixteen preamble signatures having sixteen symbols. A code is produced based on the preamble sequence. The produced code is phase ... | 09/05/2006 |
| 7103240 | Method and apparatus for providing inductive coupling and decoupling of high-frequency, high-bandwidth data signals directly on and off of a high voltage power line The present invention is drawn to an electrically “closed” method and apparatus for transmitting and receiving data signals over a high voltage power line. Inductive coupling is employed for coupling and decoupling the data signal directly on to and off of a sin... | 09/05/2006 |
| 7103114 | Modulated radio signal transmitter with self-adapted amplification polarization The invention relates to a transmitter of radio signals (SMS), which are amplitude-modulated according to a discrete plurality of amplitude levels, in which at least one output power transistor (6) receives, on one of its terminals, a bias-voltage level which... | 09/05/2006 |
| 7099380 | Apparatus for antenna diversity for wireless communication and method thereof A method and an apparatus for selecting an antenna from an antenna diversity array in a wireless communication system are provided. The method includes the steps of modulating an incoming signal with a spread-spectrum type modulation, measuring a signal quality valu... | 08/29/2006 |
| 7099626 | Method and apparatus for gain equalization based on wide-band multi-carrier base station A method and apparatus of gain equalization based on a wide-band multi-carrier base station calculates or tests non-uniformity of a gain of an analog intermediate frequency and a radio frequency in advance and stores corresponding correction values in tables. In an ... | 08/29/2006 |
| 7095801 | Phase adjustable polyphase filters A polyphase filter for wireless communication systems includes at least two phase splitting filters each having a variable resistance across their respective outputs. The variable resistance can take any suitable form, such as a MOS transistor biased in the linear (... | 08/22/2006 |
| 7095988 | Apparatus for linear transmitter with improved loop gain stabilization A device for linear transmitter (150) with improved loop gain stabilization. The linear transmitter (150) includes a main amplifier loop (178) and an auxiliary loop (176). The device includes an adjustable device (159), connected w... | 08/22/2006 |
| 7095278 | Power amplifier arrangement and method for memory correction/linearization A device, system, and method are provided for a power amplifier arrangement. In embodiments of a Vdd modulated power amplifier arrangement, a memory correction block includes a Vdd predictor for predicting waveform distortions of a Vdd modulated power supply and a m... | 08/22/2006 |
| 7092454 | Method and apparatus of compensating imbalance of a modulator Briefly, a method and apparatus to compensate an imbalance of a modulator by providing calibration parameters to a calibration network. The modulator may receive a pair of predetermined sinusoidal in-phase and quadrature signals and output a distorted modulated sign... | 08/15/2006 |
| 7091778 | Adaptive wideband digital amplifier for linearly modulated signal amplification and transmission An apparatus including an amplitude mapping circuit for converting at least a portion of an amplitude signal to a binary value and a plurality of amplifiers coupled to the amplitude mapping circuit, such that the binary value is transmitted to at least one of the pl... | 08/15/2006 |
| 7091779 | Non-linear modeling method In the present invention a completely different approach for modeling of non-linear devices or processes is used. A cascade of blocks each depending on a non-linearity parameter are utilized both in non-linear modeling and a pre-distorter design. The new non-linear ... | 08/15/2006 |
| 7092683 | Transmission circuit A transmission circuit includes: a modulated signal generator for outputting a modulated signal; an envelope detector for outputting an amplitude modulated voltage; an amplitude roll-off LPF for attenuating the amplitude modulated voltage by using a damping property... | 08/15/2006 |
| 7088958 | Remote power amplifier linearization A communication system (20) includes a hub radio (22) that wirelessly communicates with any number of user radios (24). The hub radio (22) monitors signal quality measurements compiled from the communication signals (30′) transmi... | 08/08/2006 |
| 7085330 | Method and apparatus for amplifier linearization using adaptive predistortion A signal processing method and apparatus capable of correcting signal distortion introduced by an RF power amplifier is disclosed, which includes the use of a buffer to store a plurality of samples representing at least a portion of an input signal intended for ampl... | 08/01/2006 |
| 7085623 | Method and system for using short ranged wireless enabled computers as a service tool A handheld device for use in a wireless environment to operate an apparatus is provided. The handheld device sends a request to an apparatus controller to initiate a maintenance sequence. The handheld device receives information from the apparatus controller to cont... | 08/01/2006 |
| 7085333 | Constant-phase, gain-controlled amplification circuit An amplification circuit (10) is used in a radio receiver (12) to achieve both constant phase shift over the gain range and low intermodulation. A gain-controlled amplifier (16) is desirably optimized for good fidelity, even if at the expense of... | 08/01/2006 |
| 7081795 | Predistortion circuit, low-distortion power amplifier, and control methods therefor An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by t... | 07/25/2006 |
| 7082290 | Communication semiconductor integrated circuit, a wireless communication apparatus, and a loop gain calibration method A polar-loop wireless communication apparatus includes, on a forward path between an amplitude detector and a power amplifier which constitute an amplitude control loop, a variable gain amplifier and a switch to change characteristics of a loop filter to output a fr... | 07/25/2006 |
| 7079819 | RF transmitters with saturation detection and correction and methods therefor Methods in radio communications devices having a transmitter with an integral control loop, and in other integral control systems, including generating a first error signal (210) based upon an amplifier output signal and a corrected reference signal, generati... | 07/18/2006 |
| 7079588 | Method and apparatus for processing signals in an array antenna system An antenna system (10), includes a plurality of antenna elements (21–25). Respective analog signals corresponding to respective antenna elements are subjected to respective phase shifts, are digitized using one-bit samples, are then subjected to an e... | 07/18/2006 |
| 7076698 | Vector monitor, related method of controlling a transmitter and transmitter employing the same The present invention is directed to a vector monitor for use with a transmitter employing in-phase and quadrature phase input and feedback signals, and a method of controlling a transmitter. In one embodiment, the vector monitor includes an error detection circuit ... | 07/11/2006 |
| 7076266 | System and method for power control calibration and a wireless communication device A technique for calibrating the open-loop transmit power of a wireless communication device overcomes the inherent nonlinearities in the gain control input of a variable gain amplifier (VGA). In one embodiment, a feedback circuit generates a signal indicative of the... | 07/11/2006 |
| 7075414 | Device and method for communicating data signals through multiple power line conductors The present invention provides a device for providing communications through power lines comprised of multiple conductors by transmitting the data signals through a plurality of the conductors. One embodiment of the present invention may be comprised of a transmit c... | 07/11/2006 |
| 7072420 | Communications systems The invention relates to a method of adjusting a radio frequency signal produced by radio frequency circuitry in response to receipt of phase and amplitude control signals from digital baseband circuitry which operates to convert digital data signals into such phase... | 07/04/2006 |
| 7072427 | Method and apparatus for reducing DC offsets in a communication system Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be... | 07/04/2006 |
| 7068096 | EER modulator with power amplifier having feedback loop providing soft output impedance An EER amplifier for amplifying an RF signal includes: (II) a first RF amplifier for amplifying the phase portion of the signal; (III) an EER modulator for amplifying the envelope or baseband portion of the signal,... | 06/27/2006 |
| 7068102 | Power amplifying apparatus and method using pre-distortion and radio communication system including the same apparatus A new concept of power amplifying apparatus and method is developed for adopting pre-distortion and applying to a radio communication system. The power amplifying apparatus includes a pre-distortion module for pre-distorting an input signal x(n) according to a pre-d... | 06/27/2006 |
| 7068985 | Radio transmitters with temperature compensated power control profiles and methods of operating same A radio transmitter includes a power control table, a power amplifier, and a power controller. The power control table includes a plurality of control values. The power amplifier amplifies an RF signal for transmission with an adjustable gain. The power controller a... | 06/27/2006 |
| 7068983 | Method for detecting quadrature modulator carrier leak adjusting point by geometrical analysis/calculation method, carrier leak adjusting method, and quadrature modulation apparatus The first, second, and third pairs of DC voltages which set a modulated signal to a predetermined reference level while the levels of I and Q signals supplied to a quadrature modulator are set at “0” are sequentially obtained. On the basis of the first, second, ... | 06/27/2006 |
| 7068980 | Pre-distortion apparatus and method for recovering nonlinear distortion of high power amplifier A pre-distortion apparatus and method for recovering nonlinear distortion of a high power amplifier. The pre-distortion apparatus includes: a demodulator for demodulating a signal outputted from the high power amplifier, generating a demodulated signal; a first stor... | 06/27/2006 |
| 7068745 | Feedforward amplitude cancellation topology for multi-carrier applications A multi-carrier receiver system and method for receiving a transmission frequency multi-carrier signal include a feedforward cancellation loop. A frequency conversion circuit generates an intermediate frequency (IF) multi-carrier signal based on the transmission fre... | 06/27/2006 |
| 7065330 | Transmitter A transmitter comprises a device (20) for frequency up-conversion of a communication signal having at least two consecutive frequency conversion stages, a power amplifier (27) for amplifying the output signal therefrom for obtaining a transmission sign... | 06/20/2006 |
| 7065155 | Method and apparatus for a transceiver having a constant power output The present invention includes a transceiver and a method of operating the same that includes in the transmitter a power control circuit that operates on an analog differential signal containing data packets individually. The power control circuit initially transmit... | 06/20/2006 |
| 7065334 | Variable gain amplifier device A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control ... | 06/20/2006 |
| 7062248 | Direct conversion receiver having a low pass pole implemented with an active low pass filter A wireless communications mobile station (10) includes at least one antenna (240) and a RF transceiver (210,220) containing a direct conversion receiver (1) coupled to the antenna. The direct conversion receiver contains a low noise ampli... | 06/13/2006 |
| 7061990 | Systems and methods for the dynamic range compression of multi-bearer single-carrier and multi-carrier waveforms The present invention is related to methods and apparatus that can advantageously reduce a peak to average signal level exhibited by single or by multicarrier multibearer waveforms. Embodiments of the invention further advantageously can manipulate the statistics of... | 06/13/2006 |
| 7061316 | High frequency power detector with dBm-linear characteristic and method of regulating the power of an electrical HF-oscillation A high frequency power detector includes an input coupling arrangement that couples an electrical HF-oscillation into a basic circuit portion including at least a first diode and a circuit node. The power detector further includes a series circuit of a resistor and ... | 06/13/2006 |
| 7062234 | Pre-distortion cross-cancellation for linearizing power amplifiers In an amplifier system having two or more different amplifier sub-systems, the input signal to at least one of the amplifier sub-systems is pre-distorted based on the combined output signal from the two or more amplifier sub-systems. In one embodiment, each other am... | 06/13/2006 |
| 7061989 | Fully digital transmitter including a digital band-pass sigma-delta modulator A digital transmitter (20) that may be advantageously used in a high-frequency transceiver, such as a wireless telephone handset, is disclosed. The transmitter (20) includes digital upconverter functions (36I, 36Q) that operate in combina... | 06/13/2006 |
| 7061991 | Systems and methods for the reduction of peak to average signal levels of multi-bearer single-carrier and multi-carrier waveforms The present invention is related to methods and apparatus that can advantageously reduce a peak to average signal level exhibited by single or by multicarrier multibearer waveforms. Embodiments of the invention further advantageously can manipulate the statistics of... | 06/13/2006 |
