Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8155235 | Modulation device and demodulation device Provided is a modulation device which generates a phase modulation signal and an amplitude modulation signal and can correct an I/Q orthogonal shift and reduce degradation of the ON/OFF ratio. In the device, a phase shifter (174) controls voltage applied to a... | 04/10/2012 |
| 8144801 | Satellite communication system utilizing low density parity check codes An approach for reliably communicating over a satellite in support of a communication service including, for example, as direct broadcast satellite and data service, is disclosed. An input message is encoded, yielding a structured Low Density Parity Check (LDPC) cod... | 03/27/2012 |
| 7978782 | Method and system for polar modulation using a direct digital frequency synthesizer Methods and systems for polar modulation using a digital direct frequency synthesizer (DDFS) are disclosed and may comprise generating a phase modulated signal in a DDFS, amplitude modulating the generated phase modulated signal in a non-linear device and transmitti... | 07/12/2011 |
| 7916804 | Method and system for a fast-switching phase-locked loop using a direct digital frequency synthesizer Aspects of a method and system for a fast-switching Phase-Locked Loop using a Direct Digital Frequency synthesizer may include generating a second signal from a first signal by: translating an inphase component of said first signal in frequency via a filtered fast-s... | 03/29/2011 |
| 7826550 | Method and system for a high-precision frequency generator using a direct digital frequency synthesizer for transmitters and receivers Aspects of a method and system for a high-precision frequency generator using a direct digital frequency synthesizer for transmitters and receivers may include generating a second signal from a first signal by frequency translating an inphase component of the first ... | 11/02/2010 |
| 7646824 | Method and system for a fast-switching phase-locked loop using a direct digital frequency synthesizer Aspects of a method and system for a fast-switching Phase-Locked Loop using a Direct Digital Frequency synthesizer may include generating a second signal from a first signal by: frequency translating an inphase component of the first signal utilizing a filtered fast... | 01/12/2010 |
| 7529313 | Distortion compensation quadrature modulator and radio transmitter An apparatus includes: an affine transformer that subjects input complex IF signals I(t) and Q(t) to affine transformation according to affine transformation coefficients, and outputs compensated signals a(t) and b(t); a quadrature modulator that applies quadrature ... | 05/05/2009 |
| 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 |
| 7363570 | Method of converting parity check matrix for low density parity check coding A method of converting a parity check matrix for low density parity check coding comprising moving rows and columns of the parity check matrix such that the parity check matrix includes a lower triangular submatrix. A calculation load for creating parity information... | 04/22/2008 |
| 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 |
| 7352775 | Partial duplex frequency domain modulator system and method In a multi-carrier transmission scheme (frequency domain multiplexed—FDM), a single high rate data stream is split into multiple lower rate data streams each transmitted over a different carrier (e.g., a tone or bin). The data rate possible from a multiple-carrier... | 04/01/2008 |
| RE40206 | Communication system At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point g... | 04/01/2008 |
| RE40134 | Communication system At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point g... | 03/04/2008 |
| 7336748 | DDS circuit with arbitrary frequency control clock A test system using direct digital synthesis for generation of a spectrally pure, agile clock. The clock is used in analog and digital instruments in automatic test system. A DDS circuit is synchronized to the tester system clock because it is clocked by a DDS clock... | 02/26/2008 |
| 7336940 | Frequency conversion techniques using antiphase mixing A frequency upconverter using mixers operating on one or more signals and inverted versions thereof and a subtractor, such as a balun, for subtractively combining the mixer outputs to produce an upconverted signal. ... | 02/26/2008 |
| 7334181 | Method and system for providing 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 short LDPC code by shortening longer mother codes. The short LDPC code has an outer Bose Chaudhuri Hocquenghem (BCH) code. According to another aspect, for an L... | 02/19/2008 |
| 7330505 | Equaliser apparatus and methods An equalizer for a digital communications system includes a first buffer to store received data prior to equalisation; a second buffer to store error-checked received data; a channel estimator coupled to the first and second buffers to determine a channel estimate u... | 02/12/2008 |
| 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 |
| 7302235 | Synchroniser A synchroniser for use in a receiver which receives signals, wherein the synchronizer provides a digital control signal, the control signal defining a plurality of different levels; controls the level provided by successive ones of the control signals, successive on... | 11/27/2007 |
| 7286597 | Methods and systems for adaptive receiver equalization Methods and systems for minimizing distortions in an analog data signal include equalizing the analog data signal at a receive end. In an embodiment, the invention adapts equalization parameters to a signal path associated with the analog data signal. Adaptive contr... | 10/23/2007 |
| 7286809 | Method and circuit system for suppressing noise in a signal processing circuit Noise impulses are suppressed in a signal processing circuit by gating an input signal. The gated signal is then smoothed upstream of demodulating the smoothed signal as viewed in a signal flow direction from a signal input to a processed signal output. The signal p... | 10/23/2007 |
| 7272522 | Method and systems for optimizing high-speed signal transmission A method and systems for automatically adjusting the parameters of signal emitter in a synchronous high-speed transmission system, is disclosed. According to the method of the invention, the quality of a high-speed received signal is analyzed for a plurality of sets... | 09/18/2007 |
| 7263148 | Source synchronous CDMA bus interface A wireless IC interconnect system and a source synchronous CDMA (SS-CDMA) bus interface facilitate interconnections between first and second IC locations. A signal conveyed using the wireless system is modulated and capacitively coupled to a transmission medium, and... | 08/28/2007 |
| 7263651 | Method and apparatus for varying lengths of low density party check codewords A method and apparatus for encoding/decoding information using low density parity check (LDPC) codewords of varying lengths. In one implementation, an encoder/decoder uses a parity check matrix having a size that corresponds to a length of information for each codew... | 08/28/2007 |
| 7260361 | Locating interfering devices in wireless networks using channel adaptation metrics A method, apparatus and system relate to detecting an interfering device in a wireless network such as a wireless local area network (WLAN). In wireless networks using orthogonal frequency division multiplexing (OFDM) and adaptive bit loading (ABL), adaptive modulat... | 08/21/2007 |
| 7239846 | Up-conversion modulation loop for multi-mode mobile communication The present invention relates to a signal modulation loop for the multi-mode mobile communication. The adaptive up-conversion modulation loop is applied in the multi-mode mobile communication, and is used for signal integration for the communication system comprisin... | 07/03/2007 |
| 7230993 | Method and apparatus for modulation using an at least four-dimensional signal constellation A digital communication system (20) in which a signal constellation (30) of a dimensionality of at least four is used, with distance properties chosen to reduce the bit error rate compared to that of digital communication systems using signal constella... | 06/12/2007 |
| 7228100 | Program data display in duplicative digital audio broadcasting system Program data is provided in association with a main audio program to a receiver of a duplicative radio broadcasting system wherein a duplicative broadcast (such as a hybrid IBOC broadcast) includes a primary channel and a backup channel in a predetermined frequency ... | 06/05/2007 |
| 7221718 | I/Q demodulator and I/Q signal sampling method thereof An I/Q demodulator optimized with a minimum amount of hardware. First and second multiplexers generate I and Q signals with respect to an input data signal; and first and second 2-decimation units decimate the I and Q signals generated by the first and second multip... | 05/22/2007 |
| 7214189 | Methods and apparatus for tissue activation and monitoring Techniques for controlling one or more modular circuits (“satellites”) that are intended for placement in a subject's body. The one or more satellites are controlled by sending signals over a bus that includes first and second conduction paths. Also coupled to t... | 05/08/2007 |
| 7203887 | Method and system for routing in low density parity check (LDPC) decoders An approach is provided for decoding a low density parity check (LDPC) coded signal. Edge values associated with a structured parity check matrix used to generate the LDPC coded signal are retrieved from memory. The edge values specify the relationship of bit nodes ... | 04/10/2007 |
| 7199615 | High speed signaling system with adaptive transmit pre-emphasis and reflection cancellation A signaling system having an equalizing transmitter and equalizing receiver. The equalizing transmitter transmits a signal to a receive circuit. A first sampling circuit within the equalizing receiver samples the signal to determine whether the signal exceeds a firs... | 04/03/2007 |
| 7194390 | Predictor of minimal noise figure for wideband amplifier A predictor allows the computation of the greatest lower bound of the noise figure pertaining uniformly over the operating band of a wideband amplifier. This computation is done directly from noise-parameter data of the amplifier. ... | 03/20/2007 |
| 7167528 | Modulation system for modulating data onto a carrier signal with offsets to compensate for doppler effect and allow a frequency synthesizing system to make steps equal to channel bandwidth A method and system for modulating data onto a carrier signal in a plurality of channels, each of the channels having a channel bandwidth, can be created for use in any two-way satellite communication system or other wireless communication application where frequenc... | 01/23/2007 |
| 7162000 | Delay locked loop synthesizer with multiple outputs and digital modulation A delay locked loop circuit (200) in which multiple outputs are produced. A single delay line (24) is shared among multiple tap selection circuits (256A, 265B, 265C). Fixed phase shifts (412) can be introduced between multip... | 01/09/2007 |
| 7137029 | Information processor An information processor is provided with: two chip sets that are each provided with a serial controller, these chip sets being the interface between a CPU and an input/output device; a selector for switching the connection routes between the serial controllers and ... | 11/14/2006 |
| 7136626 | Radio frequency modulator A transmitter architecture (200) provides for a stable and low noise modulator where the modulation bandwidth is uncorrelated to the TX loop bandwidth. The output signal (228) of the TX loop is demodulated by a demodulator (208) and the demodula... | 11/14/2006 |
| 7136447 | Clock recovery circuit A clock recovery circuit for establishing bit synchronization with a received signal. The clock recovery circuit comprises a conventional early-late gate circuit and a loop filter. The loop filter receives an output signal of an early sample circuit included in the ... | 11/14/2006 |
| 7127002 | System and method for frequency and phase modulating data on a SCSI bus or a serial SCSI link A system and a method for multiplying data throughput in a SCSI bus includes identifying multiple frequencies within a bandwidth of a SCSI bus. A binary value is assigned to each one of the multiple frequencies. One of the multiple frequencies is selected. The assig... | 10/24/2006 |
| 7120202 | Wireless communication apparatus In a wireless communication apparatus which has the functions of both ASK modulation and QPSK modulation, which can be manufactured at a low cost, and which is small in size, an output terminal of a QPSK modulator is connected to a carrier wave input terminal of an ... | 10/10/2006 |
