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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 8145148 | Transmitter and communication apparatus A signal generation section generates an amplitude signal and an angle-modulated signal. An adaptive compensation filter performs waveform shaping on the amplitude signal in accordance with a magnitude of the amplitude signal. An amplitude amplification section outp... | 03/27/2012 |
| 8131230 | Method and system for FM transmitter coexistence A system and method for operating an FM system and wireless networking system coexistent in a mobile wireless device. A mobile wireless device includes a frequency modulation (“FM”) system that includes an FM transmitter and, optionally, an FM receiver. The mobi... | 03/06/2012 |
| 8095086 | FM simulcast broadcast signal broadcast transmission system and receiver device The invention relates to a FM simulcast broadcast signal, in which an analogue and digital signal are combined for a transmission in a transmission channel with limited bandwidth as a total signal (s), which has a first phase speed (vs), an auxiliary signal (hs) is ... | 01/10/2012 |
| 8095087 | Polar modulation with coarse and fine FM signals Apparatus and methods for enhancement of performance in polar modulators are described. In one implementation, an FM signal component is divided into a coarse FM signal and a residue FM signal to be applied to a VCO for generation of a modulation signal. The coarse ... | 01/10/2012 |
| 8000659 | Polar modulation transmission apparatus A polar modulation transmission apparatus is disclosed, which reduces the circuit scale by removing isolators and which reduces the heat loss of a power amplifier. In this apparatus, current detecting section 130 detects current value Icc of current flowing f... | 08/16/2011 |
| 7979037 | Frequency modulation circuit, transmission circuit, and communication apparatus A bandpass type delta sigma modulation section performs delta sigma modulation on an inputted modulation signal such that quantization noise is reduced in a frequency band which requires low noise. A low pass filter removes a noise component in a high frequency regi... | 07/12/2011 |
| 7725086 | Method and apparatus for controlling a transmitter A transmitter includes a transformer that is configured to transform a baseband signal into an amplitude information signal and a phase information signal. The transmitter includes a ramping control unit configured to generate a power control signal. The transmitter... | 05/25/2010 |
| 7715809 | EDGE modulator Circuits and methods for modulators that receive symbols, and provide I (incident, or in-phase) and Q (quadrature) component values from a look-up table for subsequent filtering and digital-to-analog conversion. The I and Q component values depend on frequency corre... | 05/11/2010 |
| 7587180 | FM modulator An FM modulator measuring an f-V characteristic of a voltage controlled oscillator in a reduced time period. In the FM modular a characteristic measurement time control section 110 notifies a correction section 108 of a time at which a measurement of t... | 09/08/2009 |
| 7551904 | Apparatus and method for high efficiency power amplification for a mobile communication system An method and apparatus for power amplification in a mobile communication system, wherein a signal converter for receives signals from a baseband-side, modulates the received signals into oversampled baseband digital signals, and generates signals having a constant ... | 06/23/2009 |
| 7433653 | Transmitter and semiconductor integrated circuit for communication A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted fro... | 10/07/2008 |
| 7424274 | Digital transmitter and method A transmitter and method is provided for digitally upconverting a baseband digital signal to a modulated intermediate frequency (IF) digital signal and sigma-delta modulating the IF digital signal. The baseband digital signal is split into N phases, as can be accomp... | 09/09/2008 |
| 7412213 | Envelope limiting for polar modulators Envelope limiting for a polar modulator. A system is provided that intelligently compresses the amplitude modulation in a polar modulator so that it can be implemented with a single-stage variable gain amplifier. Limiting the amplitude modulation range on the low si... | 08/12/2008 |
| 7403079 | Frequency modulator and frequency modulation method A frequency modulation method is provided in which the frequency of a carrier signal is modulated on the basis of the frequency of a modulation signal, and in which the modulation signal is integrated. The carrier signal is integrated, and a differential signal is f... | 07/22/2008 |
| 7395038 | High-efficiency modulating RF amplifier The present invention, generally speaking, provides for high-efficiency power control of a high-efficiency (e.g., hard-limiting or switch-mode) power amplifier in such a manner as to achieve a desired modulation. In one embodiment, the spread between a maximum frequ... | 07/01/2008 |
| 7383027 | Transmission circuit A transmission circuit capable of transmitting a modulated wave signal using polar modulation in a broad band and with low power consumption is provided. The transmission circuit generates an amplitude signal and a phase signal based on data to be transmitted, and s... | 06/03/2008 |
| 7378918 | Two-point modulation type phase modulation apparatus, polar modulation transmission apparatus, wireless transmission apparatus and wireless communication apparatus There provides a two-point modulation phase modulation apparatus capable of obtaining an RF phase modulation signal of superior modulation precision with low power consumption and a simple configuration even in the event of inputting a wide band baseband modulation ... | 05/27/2008 |
| 7376399 | Weighted mixing circuitry for quadrature processing in communication systems Mixing circuitry for quadrature processing in communication systems and related methods are disclosed. The weighted mixing circuitry allows for arbitrary dividers to be utilized in generating the mixing signals for quadrature processing and thereby provides a signif... | 05/20/2008 |
| 7369819 | Digital amplitude modulation transmitter with pulse width modulating RF drive A digital amplitude modulation (AM) transmitter with pulse width modulating RF drive is presented. A plurality of RF amplifiers, each, when turned on, amplifies an applied RF drive signal by the same amount to provide a unit step RF output. An encoder supplies turn-... | 05/06/2008 |
| 7358923 | Enhanced magnetic field communication system Devices and methods are provided to enhance magnetic field communication. One aspect of the present subject matter relates to a method for transmitting and receiving signals using an antenna element electrically connected to a driver and an amplifier. According to v... | 04/15/2008 |
| 7359680 | Delay calibration in polar modulation transmitters A method and apparatus for dynamically compensating for delay mismatch between a supply signal and an input signal of a power amplifier in polar modulation transmitters. One exemplary polar modulation transmitter according to the present invention comprises a power ... | 04/15/2008 |
| 7356324 | Mobile radio receiver device The invention is directed to a receiver arrangement, for example, in a mobile radio, which allows the use of slowly locking phase locked loops for a point-to-point connection between two transceivers, even in the case of a heterodyne receiver structure. The need to ... | 04/08/2008 |
| 7356315 | Outphasing modulators and methods of outphasing modulation In one exemplary embodiment of the invention, an outphasing modulator may include at least a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal. The outphasing modulator may also include a phase s... | 04/08/2008 |
| 7352721 | Beam forming apparatus and method for an array antenna system A joint channel and Direction of Arrival (DOA) estimation apparatus and method simplified to efficiently estimate a channel impulse response associated with a spatially selective transmission channel occurring in a mobile radio channel are provided. To uniformly pro... | 04/01/2008 |
| 7348838 | Method and system for DC offset cancellation from a modulated signal Provided are a method and system for removing an offset direct current (DC) component from an input waveform. The method includes multiplying the input waveform with a demodulation waveform to produce a first differential current signal. An absolute value representa... | 03/25/2008 |
| 7340230 | Receiver architectures utilizing coarse analog tuning and associated methods Receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as a set-top box signal spectrum for satellite communications. These architectures provide significant a... | 03/04/2008 |
| 7333780 | Polar modulation transmission apparatus and radio communication apparatus A polar modulation transmission apparatus is provided which can adjust synchronization between an amplitude signal and phase signal in a simple configuration accurately and automatically. A polar signal generation circuit 101 sends an amplitude signal and pha... | 02/19/2008 |
| 7324798 | 2-order sub-harmonic frequency modulator having high carrier suppression ratio and direct conversion transmitter using the same Disclosed herein is a 2N-order sub-harmonic frequency modulator and direct conversion transmitter using the same. The direct conversion transmitter includes a digital modulation unit, a D/A conversion unit, a DC correction and low pass filter unit, a loca... | 01/29/2008 |
| 7321263 | Class E power amplifier circuit and associated transmitter circuits A class E power amplifier circuit comprising an active device, a DC blocking element and an oscillating element, wherein the oscillating element is driven by a voltage signal. ... | 01/22/2008 |
| 7321752 | Linear amplification arrangement with non-linear amplifier element for a mobile radio device A system and method to optimize the efficiency of an amplifier device is provided by the including a non-linear amplifier in a mobile radio device. A phase displaced signal in relation to the input signal is respectively produced in the amplifier device with a non-l... | 01/22/2008 |
| 7305046 | I/Q modulator with carrier predistortion An I/Q modulator used for processing an I/Q signal to obtain a predistorted output signal. The I/Q signal has an I component and a Q component, and comprises a predistorter for predistorting, with a predistortion signal, a carrier signal, which comprises a first sub... | 12/04/2007 |
| 7286613 | Process and device for modulating a carrier with amplitude and phase error compensation The invention relates to processes and devices which make it possible to directly modulate an RF carrier with a quadrature signal. It consists in filtering (504) this quadrature signal around zero so as to introduce alternately (507, 508) on each of th... | 10/23/2007 |
| 7260368 | Linear amplification with non-linear components (LINC) modulator and method for generating out-phased signals for a LINC transmitter Embodiments of a linear amplification with non-linear components (LINC) modulator and method for generating out-phased signals for a LINC transmitter are generally disclosed. ... | 08/21/2007 |
| 7251462 | Modulation circuit device, modulation method and radio communication device The amplitude modulator comprises: an angle modulator for angle-modulating a phase signal to be inputted; a waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of the... | 07/31/2007 |
| 7251461 | Wireless communications system, wireless transmitter, and wireless receiver This invention includes a wireless transmitter comprising an IF-signal generator that modulates input signals into those of an intermediate frequency band, signal distributors that distribute signals from the IF-signal generator, and a plurality of signal-transmissi... | 07/31/2007 |
| 7248842 | Wireless communication apparatus having a phase control loop shared by first and second modulation modes and an amplitude control loop A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted fro... | 07/24/2007 |
| 7242964 | Shaping of EM field for transmission to multiple terminals A method and apparatus for directing energy in a plurality of azimuth directions. The amount of energy directed in the azimuth direction of a mobile terminal is a function of the location and acceptable receive strength of at least two mobile terminals. The function... | 07/10/2007 |
| 7243037 | Signal processing device, use of the signal processing device and method for signal processing A signal processing device is provided that includes a modulation unit that produces an amplitude element as well as a phase element from components that are applied thereto. A correction device is also provided, in which at least one of the components is supplied a... | 07/10/2007 |
| 7236753 | Direct outphasing modulator Embodiments of the invention describe a modulator having first and second synthesizers, for example, fractional-N synthesizers, that generate first and second outphased modulated signals with aligned phases. Embodiments of the modulator may align the phases of the o... | 06/26/2007 |
| 7233772 | Adaptive radio transceiver with filtering An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ... | 06/19/2007 |
