Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
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| Number | Title | Issue Date |
| 8184740 | Signal processing circuit Test signal generator (3) generates test signals represented, by four points, which comprise two sets of two points positioned in point symmetry with respect to the origin of an I/Q orthogonal coordinate system. Envelope detector (8) detects the amplit... | 05/22/2012 |
| 8170142 | Programmable hybrid transmit baseband module A programmable hybrid transmit baseband module includes a wireless protocol conversion module, a set of modules, and a mode select module. The wireless protocol conversion module is operable to convert outbound data into a complex signal having an in-phase (I) signa... | 05/01/2012 |
| 8139679 | System and method for controlling modulation A system and method for controlling modulation. The system includes a plurality of modulators and a transmitting unit. The plurality of modulators decodes data from a data signal and also encodes the data into a clock signal. The transmitting unit transmits the enco... | 03/20/2012 |
| 8130870 | UWB system employing gaussian minimum shift key modulation, common mode signaling and beamforming A multi-mode transmission system supporting OFDM and single-carrier signals is configured to perform interpolation and decimation such that the ratio of the interpolation factor to the decimation factor equals the ratio between the OFDM sampling rate and the single-... | 03/06/2012 |
| 8077803 | Quarter duty cycle pulse generator for interleaved switching mixer An integrated transmit circuit includes a voltage controlled oscillator (702) for generating an input frequency signal (e.g., VCO) that is provided to a divide by two quadrature generator circuit (706) which generates therefrom in-phase and quadrature ... | 12/13/2011 |
| 7978785 | Quadrature frequency doubler with adjustable phase offset The present invention provides an improved frequency doubling circuit, with adjustable phase offset. Briefly, rather than using the traditional equations cos (2ωt)=cos 2(ωt)−sin 2(ωt) and sin(2ωt)=2 sin(ωt)cos(ωt), the quadrature output signals are generated... | 07/12/2011 |
| 7961815 | Methods and systems for transmission of multiple modulated signals over wireless networks Receiver network for receiving a first filtered modulated transmitted signal in a first RF band and a second modulated transmitted signal in a second RF band and for providing received signals to one or more demodulators. A demodulator and baseband filter for demodu... | 06/14/2011 |
| 7953182 | Quadrature modulation without carrier Transmitters, receivers and associated methods are disclosed for providing phase and amplitude modulation in a carrier-less communication system (e.g., an ultra-wide band communication system). An approximate quadrature signal is provided by delaying the in-phase si... | 05/31/2011 |
| 7944994 | Data converter and data conversion method, and transmitter circuit, communications device and electronic device using the same A data converter that converts an input signal to a signal to be inputted to an amplifier. Specifically, the data converter includes: an amplitude detection section that detects an amplitude level of the input signal; a region determination section that determines w... | 05/17/2011 |
| 7916808 | 8PSK modulator A modulation circuit uses pre-calculated and stored data to generate the modulated output. The modulator architecture uses pre-calculated, Gaussian filtered sine and cosine responses that are stored in a ROM (read-only memory) or other memory structure. The modulato... | 03/29/2011 |
| 7852970 | Programmable hybrid transmitter A programmable hybrid transmitter includes a baseband processing module, an up-conversion module, and a power amplifier circuit. The baseband processing module is coupled to convert outbound data into a complex signal when the programmable hybrid transmitter is in a... | 12/14/2010 |
| 7848455 | Transmission circuit comprising multistage amplifier, and communication device Provided is a transmission circuit which is capable of compensating for an offset voltage and a sensitivity characteristic of a PA, and operating with low distortion and high efficiency. A regulator 18 supplies, to a PA 201, a voltage which is controll... | 12/07/2010 |
| 7839954 | Phase rotation of IQ origin Sampled IQ values at the origin are revalued by applying a minimum distance, or radius, away from the (0,0) coordinate in the IQ domain, and applying a rotation about the origin for consecutive (0,0) samples, thereby improving communication performance. A direction ... | 11/23/2010 |
| 7809082 | GMSK/EDGE modulator with switching transition smoothing To minimize abrupt changes in modulated signal amplitude when switching between modulation types in a multi-modulation system, a “smoothing” circuit is used. When the modulation type is changed in a multi-slot modulation, the last symbol of the previous slot is ... | 10/05/2010 |
| 7760817 | Communication system for utilizing single tone testing signal having specific frequency or combinations of DC value and single tone testing signal to calibrate impairments in transmitting signal A communication system for determining a target calibration parameter for calibrating impairments in a transmission signal is disclosed. The communication system includes a carrier signal generator, a transmitting module, a testing signal generator, a power detectio... | 07/20/2010 |
| 7742543 | Transmission circuit by polar modulation system and communication apparatus using the same A transmission circuit alleviates the frequency characteristics of a group delay and an attenuation amount in a transmission signal band and expands a dynamic range to a high frequency band. A ladder-type resistance-type attenuator includes switching elements, 2R re... | 06/22/2010 |
| 7720176 | Edge transceiver architecture and related methods In one embodiment, the present invention includes an apparatus having multiple transmission paths, including a first transmission path configured to receive and process baseband data in a first mode of operation to generate a radio frequency (RF) signal for output v... | 05/18/2010 |
| 7702033 | Modulating apparatus, mobile communication system, modulating method, and communication method An encoder encodes sound data and the like to generate a binary signal. A mapper converts the binary signal into a four-level symbol and outputs the four-level symbol. A base band filter includes a root raised cosine filter and a sinc filter. The base band filter bl... | 04/20/2010 |
| 7675995 | Apparatus and method for conditioning a modulated signal in a communications device A device for transmitting information in a communications signal is envisioned. The information is modulated, at least in part, with a first angle-related characteristic. The device has a digital conversion circuit operable to convert information to be broadcast int... | 03/09/2010 |
| 7548593 | Baseband compensation of an offset phase locked loop A phase modulator faithfully reproduces higher frequency modulation using an offset phase-locked loop (OPLL) without passing excessive noise through an increased bandwidth of the OPLL. A quadrature modulator modulates information from a baseband signal onto a passba... | 06/16/2009 |
| 7532682 | Quadrature modulation without carrier Transmitters, receivers and associated methods are disclosed for providing phase and amplitude modulation in a carrier-less communication system (e.g., an ultra-wide band communication system). An approximate quadrature signal is provided by delaying the in-phase si... | 05/12/2009 |
| 7515650 | Quadrature modulation compensation The present invention is related to methods and apparatus that compensate for quadrature impairments of an analog quadrature modulator and/or demodulator over a relatively wide signal bandwidth. One embodiment pre-distorts baseband signals in a quadrature modulator ... | 04/07/2009 |
| 7443261 | Phase modulating apparatus, communication device, mobile wireless unit, and phase modulating method A multimode-based phase modulating apparatus capable of reducing the degradation of modulation precision and suppressing the unnecessary power consumption. This apparatus has a switch for switching the modulation modes of a PLL circuit between a single-point modulat... | 10/28/2008 |
| 7440515 | System and method for controlling modulation A system and method for controlling modulation. The system includes a plurality of modulators and a transmitting unit. The plurality of modulators decodes data from a data signal and also encodes the data into a clock signal. The transmitting unit transmits the enco... | 10/21/2008 |
| 7436902 | Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation Multi-dimensional space Gray code maps for multi-dimensional phase modulation as applied to LDPC (Low Density Parity Check) coded modulation. A novel approach is provided within LDPC coded modulation communication systems that employ multi-dimensional phase modulati... | 10/14/2008 |
| 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 |
| 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 |
| 7409002 | Signal modulation According to an embodiment of the invention, a method and apparatus for signal modulation are described. According to an embodiment of the invention, a method comprises producing and transferring a modulated signal. The modulation of the signal is over a plurality o... | 08/05/2008 |
| 7403574 | Simplified scrambling scheme for satellite broadcasting systems A simplified scrambling scheme that unifies all signals of a satellite broadcasting system, including frame header (404), frame body (402) and pilot symbols (408) with a common reference phase. This results in the simplification and increased fl... | 07/22/2008 |
| 7394869 | RF transmitter architecture for continuous switching between modulation modes The present invention provides a radio transmitter having a digital modulator that further includes logic for continuous amplitude and continuous phase modulation switching in an RF transmitter intended to support both frequency shift keying (FSK) and phase shift ke... | 07/01/2008 |
| 7376883 | Method and system for providing long and short block length low density parity check (LDPC) codes An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For ⅓ rate, the relevant parameters are as follows: q=120, nldpc=64,800, kldpc | 05/20/2008 |
| 7372333 | Monolithic supply-modulated RF power amplifier and DC-DC power converter IC Embodiments of RF power amplifiers are disclosed that include switched-mode power amplifiers supplied by synchronous buck DC-DC converters. The switched-mode power amplifiers can be used to amplify a limited form of an RF input signal and the supply to the switched-... | 05/13/2008 |
| 7366747 | Digital filter circuit and data processing method A digital filter circuit is capable of processing multi-channel data having different sampling frequencies. RAMs (random access memories) are provided which store data inputted thereto respectively, and the data outputted from the RAMs are alternately processed.... | 04/29/2008 |
| 7362824 | Modulation method and radio communication system An input digital signal is periodically and alternately subjected to first modulation and second modulation, being thereby converted into a pair of a baseband I signal and a baseband Q signal. The first modulation and the second modulation are different from each ot... | 04/22/2008 |
| 7362734 | Time-slot partitioning in a TDMA system According to the present invention there is provided a method of transmitting user data in a TDMA system in which the number of channels is increased by partitioning at least one time-slot in a TDMA frame into at least two sub-time-slots. Each sub time-slot may be a... | 04/22/2008 |
| 7362820 | Apparatus and method for modulating and digitally predistorting a signal in a multiple modulation schemes A programmable modulator (100) is programmable to operate in either of a GMSK or 8PSK mode. When operating in a GMSK mode, a signal modulating circuit 105 receives (210) a bit stream (110), maps the bit stream (110) to a phase valu... | 04/22/2008 |
| 7363013 | Phase lock loop applying in wireless communication system and method thereof A phase lock loop receives a baseband signal which has an input frequency, and modulating the baseband signal to be a corresponding RF signal which has a predetermined transmission frequency for transmitting. The phase lock loop comprises a programmable divider, a m... | 04/22/2008 |
| 7358885 | Mixing DAC architectures for a radio frequency receiver A receiver (300) includes a mixing digital-to-analog converter (DAC) (118A), a direct digital frequency synthesizer (DDFS) (132) and a dynamic element matching (DEM) circuit (304). A DAC of the mixing DAC (118A) is implemented as a... | 04/15/2008 |
| 7359455 | Digital modulation and shift keying The present invention discloses an apparatus and a method of modulating a carrier with digital information having a series of datums represented in a plurality of symbols, the method comprising selecting a first number of half-periods of a first phase distinguished ... | 04/15/2008 |
| 7359457 | Transmission apparatus, reception apparatus and digital radio communication method A transmission apparatus includes a frame configuration determiner that determines a modulation system from among a plurality of modulation systems on a communication situation. A first symbol generator modulates a digital transmission signal according to the modula... | 04/15/2008 |
