Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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 |
| 8144759 | Adaptive methods employing optimal convergence factors for processing complex signals and systems Complex adaptive methods for complex information processing employ optimal individual convergence factors for real and imaginary components of the weight vector. For wireless receivers operating on QPSK, a Complex IA-ICA performs better than existing Complex Fast-IC... | 03/27/2012 |
| 8135059 | System for, and method of, processing quadrature amplitude modulated signals Analog signals encoded with quadrature amplitude modulation (QAM) pass through a coaxial cable at a particular baud rate. These signals have a carrier frequency individual to the TV station being received. They are mixed with signals from a variable frequency oscill... | 03/13/2012 |
| 8130821 | Equalization in capacitively coupled communication links An integrated circuit containing a communication channel is described. This communication channel includes a transmit circuit configured to transmit signals using a voltage-mode driver, a receive circuit, and a capacitive link that couples the transmit circuit to th... | 03/06/2012 |
| 8126045 | System and method for latency reduction in speculative decision feedback equalizers A decision feedback equalizer (DFE) and method include summer circuits configured to add a dynamic feedback tap to a received input to provide a sum and to add a speculative static tap to the sum. Sense amplifiers are configured to receive outputs of the summer circ... | 02/28/2012 |
| 8121186 | Systems and methods for speculative signal equalization Various embodiments of the present invention provide systems and methods for signal equalization, and in some cases analog to digital conversion. For example, an analog to digital converter is disclosed that includes a comparator bank that receives a reference indic... | 02/21/2012 |
| 8116366 | Delayed decision feedback sequence estimator Disclosed is a delayed decision feedback sequence estimator comprising a delayed decision feedback sequence estimator main unit including DDFSE computing unit group including (L+M) DDFSE computing units, equal in number to a length of each of plurality of blocks int... | 02/14/2012 |
| 8116367 | Multidimensional decision-directed trained adaptive equalization An embodiment of the invention is a technique to equalize received samples. An equalizer to equalize a multidimensional signal transmitted over a communication channel and having a dimensionality of four or higher. The equalizer is adaptively decision directed train... | 02/14/2012 |
| 8107523 | Segmented equalizer In one embodiment of the present invention, a segmented equalizer includes a plurality of feedforward equalizer segments, each feedforward equalizer segment responsive to delayed samples of an input signal {vn}, wherein n is the index of samples, and incl... | 01/31/2012 |
| 8107522 | Methods and apparatus for determining receiver filter coefficients for a plurality of phases Methods and apparatus are provided for determining receiver filter coefficients for a plurality of phases. One or more coefficients for a receiver filter are determined by determining a first coefficient for a first phase of a data eye; and determining a second coef... | 01/31/2012 |
| 8102910 | Re-adaption of equalizer parameter to center a sample point in a baud-rate clock and data recovery receiver An apparatus generally having a first circuit and a second circuit. The first circuit may be configured to (i) generate an equalizer parameter in response to an input signal, the equalizer parameter causing a cancellation of post-cursor inter-symbol interference fro... | 01/24/2012 |
| 8098725 | Equalization and decision-directed loops with trellis demodulation in high definition TV Improved decision feedback equalizer and decision directed timing recovery systems and methods suitable for use in connection with a dual mode QAM/VSB receiver system are disclosed. A trellis decoder operates in conjunction with a decision feedback equalizer circuit... | 01/17/2012 |
| 8098724 | Automatic calibration in high-speed serial interface receiver circuitry Circuitry for receiving a serial data signal (e.g., a high-speed serial data signal) includes adjustable equalizer circuitry for producing an equalized version of the serial data signal. The equalizer circuitry may include controllably variable DC gain and controlla... | 01/17/2012 |
| 8094710 | Wide band noise early detection and protection architecture for a frequency domain equalizer Apparatus and methods are described for detecting an impulse noise and for controlling frequency domain equalizer (FEQ) coefficient updating in response to impulse noise detection. Upon detection of the impulse noise, FEQ coefficient updating may immediately be froz... | 01/10/2012 |
| 8085841 | Sampled current-integrating decision feedback equalizer and method A decision feedback equalizer (DFE) and method including a branch coupled to an input and including a sample-and-hold element configured to receive and sample a received input signal from the input and a current-integrating summer. The current-integrating summer is ... | 12/27/2011 |
| 8081677 | Receiver-based adaptive equalizer with pre-cursor compensation An equalization circuit is disclosed that enables high data rate transmission over high loss communications channels. Also disclosed is a set of functional blocks and update criteria that allow for the equalization function to be adapted for a large variety of diffe... | 12/20/2011 |
| 8059707 | Decoding method and apparatus A decoding unit for decoding a modulated signal includes a summing unit having i) a first input, ii) a second input, and iii) an output. The summing unit is configured to i) receive the modulated signal at the first input, ii) receive a feedback signal at the second... | 11/15/2011 |
| 8054876 | Active delay line A delay line for deployment in an equalizer to insert a delay in a signal received by the delay line employs a plurality of cascaded delay stages where the delay per stage provided by an active unit-gain amplifier in each stage that provides sufficient impedance mis... | 11/08/2011 |
| 8045610 | MMSE-DFE equalization with antenna diversity for mobile DTV A decision feedback equalizer has a feedback filter and K feed forward filter branches. Each of the K feed forward filter branches receives an input signal from a corresponding one of a plurality of channels associated with a corresponding one of a plurality of ante... | 10/25/2011 |
| 8036260 | System and method for equalizing an incoming signal An equalizer is provided, including: a feedback combiner to combine an input signal and a feedback signal to produce a first signal; a delay line to delay the first signal to produce a second signal; a feed-forward combiner to combine the second signal and a feed-fo... | 10/11/2011 |
| 8031765 | Feedforward equalizer for DFE based detector A system includes a first filter that receives an input signal and comprises N taps to filter postcursor inter-symbol interference (ISI) of the input signal. S taps of the N taps have a coefficient that is limited between −1 and 0. S and N are integer values great... | 10/04/2011 |
| 8005136 | Dual PDFE system with forward-backward Viterbi The present invention provides a novel technique for improving the performance of equalizers by reducing the effects of error propagation in equalizers that use a Viterbi Decoder. Methods and systems are described that can improve the performance of equalizers by re... | 08/23/2011 |
| 7995648 | Advanced digital receiver A digital receiver for processing a signal received from a channel includes a digital demodulator and an equalizer coupled to the digital demodulator. The equalizer includes a feedforward filter and a decision feedback equalizer (DFE), wherein the feedforward filter... | 08/09/2011 |
| 7986728 | Equalizer with combined CCK encoding-decoding in feedback filtering of decision feedback equalizer A decision feedback equalizer includes a chip estimate buffer that forms chip estimates into a vector. A CCK decoder decodes the vector of chip estimates, and a CCK encoder, connected with the CCK decoder, re-encodes the vector of chip estimates into a valid CCK cod... | 07/26/2011 |
| 7983333 | Non-linear analog decision feedback equalizer An equalizer is disclosed that compensates for non-linear effects resulting from a transmitter, a receiver, and/or a communication channel in a communication system. A non-linear decision feedback equalizer compensates for the non-linear effects impressed onto a rec... | 07/19/2011 |
| RE42558 | Joint adaptive optimization of soft decision device and feedback equalizer The present invention uses a novel adaptive soft decision device in order to jointly optimize decision device and DFE operation. The soft decision device receives the input and output samples of the slicer and generates a feedback sample by non-linearly combining th... | 07/19/2011 |
| 7978760 | Decision feedback equalizer having adjusting device and method thereof A decision feedback equalizer having an adjusting device and method thereof are described. The decision feedback equalizer having an adjusting device includes a feed-forward filter, a decision device, a feedback filter, the adjusting device, and a summation device. ... | 07/12/2011 |
| 7974335 | Apparatus for equalizing decision feedback based on channel properties change and method therefor A decision feedback equalization apparatus includes a channel estimation unit estimating a channel on received signal based on the received signal and a training sequence; a channel matched filter maximizing SNR from the channel estimated by the channel estimation u... | 07/05/2011 |
| 7974336 | Equalization system and method thereof An equalization system used in a communication receiver has multiple equalization stages. A front equalizer supplies equalization output to a feed back filter in a rear equalizer to speed initialization of the rear equalizer. In addition, the rear equalizer supplies... | 07/05/2011 |
| 7974337 | High speed receive equalizer architecture Various example embodiments are disclosed. According to an example embodiment, an apparatus may include a continuous time filter, a decision feedback equalizer, a clock and data recovery circuit, and an adaptation circuit. The adaptation circuit may be configured to... | 07/05/2011 |
| 7961782 | Interference suppression processing unit and a method of suppressing interference in wireless data communication The interference suppression processing unit includes Na≧1 receiver paths to transmit respective Na≧1 received data sequences received from respective Na≧1 antennas, and a signal generation unit to generate K≧Na si... | 06/14/2011 |
| 7949041 | Methods and circuits for asymmetric distribution of channel equalization between devices A transceiver architecture supports high-speed communication over a signal lane that extends between a high-performance integrated circuit (IC) and one or more relatively low-performance ICs employing less sophisticated transmitters and receivers. The architecture c... | 05/24/2011 |
| 7936812 | Fractional-rate decision feedback equalization useful in a data transmission system Decision feedback equalization (DFE) circuits are disclosed for use with fractional-rate clocks of lesser frequency than the data signal. For example, a one-half-rate clocked DFE circuit utilizes two input data paths, which are respectively activated on rising and f... | 05/03/2011 |
| 7929598 | Lower processing rate decision feedback equalizer for higher rate carrier signal Briefly, in accordance with one or more embodiments, parallel DFE processing may be utilized for single carrier systems that employ cyclic prefixes. The achieved parallelism allows working at contemporary clock rates that are significantly lower than the required sa... | 04/19/2011 |
| 7924910 | Adaptive equalization with group delay Methods, apparatuses, and systems are presented for performing adaptive equalization involving receiving a signal originating from a channel associated with inter-symbol interference, filtering the signal using a filter having a plurality of adjustable tap weights t... | 04/12/2011 |
| 7924911 | Techniques for simulating a decision feedback equalizer circuit A computerized system simulates a non-linear Decision Feedback Equalizer. The computerized system includes a user interface, an output port, and a controller coupled to the user interface and to the output port. The controller is configured to (i) receive electronic... | 04/12/2011 |
| 7924912 | Method and apparatus for a unified signaling decision feedback equalizer A method and apparatus for advantageously utilizing the reset state of an RTZ shift register to guarantee proper data alignment at the feedback taps to facilitate decision feedback equalization (DFE) in a unified signaling system. An input data stream is sliced into... | 04/12/2011 |
| 7885325 | Apparatus for and method of controlling a feedforward filter of an equalizer A method of synchronizing a feedforward filter (46) that receives a signal resulting from the transmission of a series of symbols through a channel, wherein the series of symbols includes a predetermined sequence of symbols includes the step of developing a p... | 02/08/2011 |
| 7869498 | Low power decision feedback equalization (DFE) through applying DFE data to input data in a data latch Low power decision feedback equalization (DFE) through applying DFE data to input data in a data latch is disclosed. In one embodiment, a decision feedback equalization (DFE) system to remove a post cursor intersymbol interference (ISI) through feeding back previous... | 01/11/2011 |
| 7869497 | Frequency-domain decision feedback equalizing device and method A fast Fourier transformation is performed on a first vector of signals, and as a result a second vector of signals is provided. A feed forward equalization is performed by multiplying each of the components of said second vector with equalization parameters, and as... | 01/11/2011 |
| 7860157 | Mobile receiver equalizer structure for use in the ATSC standard A circuit structure has a channel estimator adapted to receive an input, an equalizer adapted to receive the input and generate an equalized output, and an equalizer training block adapted to receive estimated channel condition information, and provide a set of trai... | 12/28/2010 |
