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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8190105 | Modulation mode switching type communication device and modulation mode switching method To adaptively switch a modulation mode according to an operation form of quality-priority and capacity-priority in a multi-value applicable radio device having an active/standby configuration. The comparison unit 28a compares a reception monitoring sig... | 05/29/2012 |
| 8185064 | Adaptive modulation control system and wireless communication apparatus Object To reduce deterioration of transmission quality under circumstances where the moving speed is high. Overcoming Means An adaptive modulation control apparatus for adaptively selecting a modulation parameter from among a plurality of modula... | 05/22/2012 |
| 8170502 | Phase pulse system and method for bandwidth and energy efficient continuous phase modulation A new pulse shape for CPM is introduced which is obtained by a linear combination of well-known RC and REC pulse shapes. The new pulse shape addresses the tradeoff between the width of the PSD main lobe and the rate of decay of the side lobe to improve the coded per... | 05/01/2012 |
| 8155604 | Method and system for power supply adjustment and polar modulation in an RF transmitter Aspects of a method and system for power supply adjustment for polar modulation of an RF signal are provided. In an RF transmitter, a signal representative of an amplitude of a pair of phase-quadrature baseband signals may be generated, and a voltage and/or current ... | 04/10/2012 |
| 8140028 | Low noise RF driver A low noise RF driver circuit including at least two series-coupled driver stages which receive a frequency modulated signal and an amplitude modulated signal that is applied to the supply voltage input of the driver stages, and provide a combined output signal. The... | 03/20/2012 |
| 8131229 | Polar modulation with IQ zeroing Apparatus and methods for adjustment of spectral signal characteristics in polar modulators are described. A composite signal detection circuit is configured to detect when a signal trajectory of a composite signal provided to the polar modulator passes near the ori... | 03/06/2012 |
| 8126409 | Adaptive delay alignment in polar transmitters A polar transmitter includes a power amplifier (PA), an amplitude modulation (AM) path including an AM path adjustable delay, an AM path delay measurement circuit, a phase modulation (PM) path including a PM path adjustable delay, and a PM path delay measurement cir... | 02/28/2012 |
| 8116697 | System and method for reducing multi-modulation radio transmit range Systems and methods are provided for reducing multi-modulation radio transmit range. The method comprises determining a data modulation type at which a transmitter is operating, and adjusting a transmitter power according to the data modulation type to control trans... | 02/14/2012 |
| 8112047 | Configurable RF transmitter An RF transmitter includes a Cartesian to polar conversion section, a PLL, a DAC module, a mixing module, and a PA module. The Cartesian to polar conversion section converts a Cartesian based symbol stream into a polar based symbol stream. The PLL generates an oscil... | 02/07/2012 |
| 8107898 | Transmitter circuit and communication device using the same A transmitter circuit of the present invention includes: a signal generator 101 that generates an amplitude signal and a phase signal based on an input signal; a signal processor 103 that divides the phase signal into a real component and an imaginary ... | 01/31/2012 |
| 8086189 | Phase-to-frequency conversion for polar transmitters The present invention relates to a polar transmission method and a polar transmitter for transmitting phase and amplitude components derived from in-phase (I) and quadrature-phase (Q) components of an input signal. A first conversion is provided for converting the i... | 12/27/2011 |
| 8081935 | Multiple-mode modulator to process baseband signals A multiple-mode modulator is configured similarly to a direct conversion quadrature modulator with an infusion of an amplitude modulation signal path from a large signal polar modulator to improve the power amplifier efficiency. The multiple-mode modulator also incl... | 12/20/2011 |
| 8068794 | Method and system for a multisystem polar transmitter Aspects of a method and system for a Multisystem Polar Transmitter may include a single integrated circuit comprising one or more Direct Digital Frequency Synthesizer (DDFS). The single integrated circuit may generate a plurality of signals compliant with at least a... | 11/29/2011 |
| 8064848 | Transmitter and control method for transmitting and calibrating a phase signal and an amplitude signal A transmitter for transmitting and calibrating a phase signal and an amplitude signal. The transmitter comprises a phase modulation path, an amplitude modulation path, and a control unit. The phase modulation path transmits the phase signal. The amplitude modulation... | 11/22/2011 |
| 8010063 | Signal enhancement in RF transmitters employing non-linear filtering A communications transmitter having a main transmit chain for main signal features and one or more auxiliary transmit chains for auxiliary signal enhancements. In one embodiment, a communications signal is produced by digitally processing a representation of a desir... | 08/30/2011 |
| 7983632 | Feedback control loop for amplitude modulation in a polar transmitter with a translational loop Amplitude modulation is provided for a polar transmitter that incorporates a translational loop. The input to the polar transmitter and translational loop may be an amplitude modulated signal. The amplitude modulation of the transmitter may be controlled via a close... | 07/19/2011 |
| 7979036 | Fully integrated ultra wideband transmitter circuits and systems Disclosed is a novel design of a fully integrated UWB transmitter. The transmitter includes a pulse generator, a pulse modulator, and an ultra-wideband drive amplifier. A new low voltage low power pulse generator circuit is disclosed which can be fully integrated in... | 07/12/2011 |
| 7957704 | Method and system for reducing AM/PM distortion in a polar amplifier Methods and systems for reducing AM/PM distortion in a polar amplifier are disclosed and may comprise adding an offset signal to an amplitude signal in the digital domain and removing the offset signal in the analog domain during polar modulation. A sum of an amplit... | 06/07/2011 |
| 7937047 | Method and apparatus for transmitting data in mobile telecommunication system A method and an apparatus for using an Adaptive Modulation and Coding (AMC) scheme together with a method of controlling a transmitting power to increase a data transfer rate. The method of transmitting data in a transmitter including a plurality of antennas, includ... | 05/03/2011 |
| 7929926 | Transmitting RF signals employing both digital and analog components with a common amplifier Apparatus is presented for broadcasting an RF signal. This includes a signal divider that receives a composite RF signal and provides therefrom first and second signals each having digital and analog components. A phase extractor receives the first signal and provid... | 04/19/2011 |
| 7925225 | System and method for multiple input multiple output wireless transmission Systems and methods for MIMO wireless transmission are provided. At the transmitter, a plurality of encoded packets are modulated, and the symbols are divided between several transmit antennas. The transmitter spreads some of the symbols of each packet using a respe... | 04/12/2011 |
| 7917102 | Radio transmitting apparatus and radio transmission method A radio transmitting apparatus that has a plurality of antennas and changes the number of modulated signals transmitted simultaneously according to the propagation environment and so forth. A transmission power changing section 12 of a radio transmitting appa... | 03/29/2011 |
| 7917103 | WLAN and wired mobile communication and location finding system Wired and mobile cascaded communication systems and processors used in wired and wireless local area network (WLAN) and mobile systems with touch screen generated communication and control signal and position finding signals. Systems with distinct modulators for wir... | 03/29/2011 |
| 7840193 | Transmitter and communication apparatus A modulator 23 corrects an amplitude signal Rd by adding thereto an offset value α and generates, based on the corrected amplitude signal Rd, an amplitude signal Ra for amplitude-modulating a radio-frequency signal. The modulator 23 includes: an offse... | 11/23/2010 |
| 7826807 | Methods and apparatus for antenna control in a wireless terminal Base stations transmit strip signals using strip signal segments and self supporting modulation scheme techniques facilitating rapid channel estimate. A strip segment occupies one OFDM symbol time interval and uses a set of downlink tones; some, e.g., half, of the t... | 11/02/2010 |
| 7822392 | Frequency modulation circuit, transmission circuit and communication device Provided is a frequency modulation circuit for outputting a frequency-modulated signal with a high precision. A VCO 13 includes a first variable capacitor 132 having a predetermined capacitance change rate, and a second variable capacitor 133 ha... | 10/26/2010 |
| 7787836 | Multiple radios communication device and a method thereof A wireless communication device to transmit and receive signals of two or more wireless networks is disclosed. The wireless communication device includes a first radio to transmit a first type of modulated signals in at least first and second frequency bands and a s... | 08/31/2010 |
| 7653363 | System and apparatus for performing broadcast and localcast communications Described is a communication system including mobile communication devices. In the described system, the mobile devices may be wrist-worn watches such as are in common use today, except that the watches are specially configured to receive data in a “broadcast” m... | 01/26/2010 |
| 7593698 | Large signal polar modulated power amplifier Polar modulation input signals to a polar modulated power amplifier include a phase modulated (PM) input signal, which feeds a power amplifier input, and an amplitude modulated (AM) input signal, which provides an envelope supply voltage for the power amplifier. The... | 09/22/2009 |
| 7593697 | Adaptive coding and modulation The present invention provides a unique feedback system in a wireless communication system wherein the transmission channel is always overloaded with data, which is configured and modulated at a select order of modulation. Based on the channel conditions, only a por... | 09/22/2009 |
| 7577407 | System and apparatus for performing broadcast and localcast communications Described is a communication system including mobile communication devices. In the described system, the mobile devices may be wrist-worn watches such as are in common use today, except that the watches are specially configured to receive data in a “broadcast” m... | 08/18/2009 |
| 7574180 | Transmitter A transmitter for modulating an externally supplied audio signal according to a predetermined modulation system and for transmitting an obtained modulation signal includes a modulator for modulating the audio signal according to the modulation system; a balance conv... | 08/11/2009 |
| 7570928 | System and method for low delay corrective feedback power amplifier control A system for controlling the power output of a power amplifier includes a power amplifier through which a transmit signal having an amplitude-modulated (AM) component and a phase-modulated (PM) component is passed and amplified, the power amplifier comprising a forw... | 08/04/2009 |
| 7555268 | RF transmitter having multiple constant transmit power levels A radio frequency transmitter includes a baseband transmit processing module, a mixing module, a power amplifier, a transmit power sense module, and a transmit power control module. The baseband transmit processing module is operably coupled to encode outbound data ... | 06/30/2009 |
| 7555269 | Adaptive modulation scheme and coding rate control method A radio communication system for enabling control of a modulation scheme following variation in the propagation channel and control of a coding rate in a small amount of delay and arithmetic operation. In order to attain the object explained above, a transmitter sta... | 06/30/2009 |
| 7466965 | Transmission method and transmitter circuit An amplitude component of a modulating signal is detected, band-divided by first and second frequency selecting circuits, and an amplitude component of a high-frequency band is down-converted by a first frequency conversion circuit. An amplitude component selected b... | 12/16/2008 |
| 7439813 | Method and system for generating carrier frequencies for UWB application Apparatus and method for generating first, second and third carrier frequencies of 3432 MHz, 3960 MHz and 4488 MHz respectively, for use in a wireless transmission system deploy only first and second PLLs which are configured to generate 6336 MHz and 2640 MHz signal... | 10/21/2008 |
| 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 |
| 7428407 | Amplitude modulator, in particular for mobile radio, and a method for modulation of a signal An amplitude modulator is provided, which has a first supply connection for supplying a supply potential and a second supply connection for supplying a ground potential. An amplifier stage with a push-pull output stage has a signal input for supplying a signal, and ... | 09/23/2008 |
| 7427903 | Polar modulator and a use thereof A polar modulator has a low AM-AM and AM-PM distortion comprises a phase locked loop. The phase locked loop is designed for outputting a high-frequency signal with a frequency derived from a phase modulation signal at an actuating input of the phase locked loop. A f... | 09/23/2008 |
