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| Number | Title | Issue Date |
| 8144757 | System and method for estimating probabilities of events A dual adaptive importance-sampling system and method is provided that can estimate the probability of events by combining dual complementary importance-sampling simulations. The present invention exploits the ability to determine an optimal biased pdf using an iter... | 03/27/2012 |
| 8135056 | Noise and channel estimation using low spreading factors Noise measurements are made within a fraction of a single symbol period of a longest orthogonal code symbol. A control processor identifies an unoccupied code having a spreading factor that is less than a longest spreading factor for the system. A despreader measure... | 03/13/2012 |
| 8126042 | FEXT estimation and signaling in vector transmission Embodiments related to FEXT estimation and signaling in vectored systems are described and depicted herein. ... | 02/28/2012 |
| 8116363 | Method of determining true error vector magnitude in a wireless LAN Systematic transmit IQ phase and amplitude imbalances in the transmit chain of a wireless local area network (WLAN) cause a corresponding systematic shift in the roots of a constellation diagram. Additional random phase noise in the transmit chain will cause a furth... | 02/14/2012 |
| 8107517 | Average-tap energy based thresholding for channel estimation in multi antenna systems Techniques to facilitate estimating the frequency response of a wireless channel in an OFDM system are provided. The method and systems allow for combining signal information across multiple communication channels at one or more channel tap delays in order to determ... | 01/31/2012 |
| 8054872 | Method and apparatus for signal carrier-to-noise power density ratio calculation There is provided an apparatus for determining a carrier-to-noise power density ratio (CN0) of a spread spectrum signal. The apparatus includes a signal power calculation unit and a conversion unit. The signal power calculation unit determines a signal power ... | 11/08/2011 |
| 8027379 | Monitoring and adjusting noise parameters One embodiment of the present invention relates to a method of monitoring impulse noise. In the method, clusters of corrupted symbols in a stream of symbols are characterized in accordance with a cluster parameter associated with the clusters. Other methods and syst... | 09/27/2011 |
| 8018991 | Apparatus and method for estimating carrier-to-interference and noise ratio in a communication system An apparatus and method for estimating a Carrier-to-Interference and Noise Ratio (CINR) in a communication system are provided. In the apparatus and method a signal having a traffic allocation available area that includes a preamble allocation available area is gene... | 09/13/2011 |
| 7978756 | Systems and methods for monitoring impulse noise Systems and methods for monitoring impulse noise are described. At least one embodiment is a method, which comprises detecting whether impulse noise is present and in response to detecting the presence of impulse noise, performing time domain analysis to determine w... | 07/12/2011 |
| 7961779 | Noise-driven recovery of a digital pulse stream Provided is a method and system for noise-driven recovery of a digital pulse stream. The method includes receiving initial parameters including the base characteristics of a pulse signal, the characteristics including the minimum pulse interval. An incoming analog s... | 06/14/2011 |
| 7953144 | Method and system for detecting impulse noise in a broadband communication system A method halts transmission and/or reception of a desired signal on a channel in a communication network and samples an analog metric versus time on the channel at a predetermined sample rate. Successively sampled sets of data are stored first to a one dimensional a... | 05/31/2011 |
| 7949040 | Reception quality measuring apparatus and reception quality measuring method A reception quality measuring apparatus of the present invention comprises a first sub-carrier averaging unit for averaging and outputting a channel gain after equalization estimated on the basis of the pilot signal over a sub-carrier, a first power calculation unit... | 05/24/2011 |
| 7940838 | Distortion characterization system This invention provides a system for evaluating the performance of electronic components and systems by minimizing or eliminating intersymbol interference (ISI). The apparatus includes a transmitter, a device under test, a receiver, and at least one electrical conne... | 05/10/2011 |
| 7804891 | Device and method for judging communication quality and program used for the judgment A device and method for effectively judging a communication quality in a communication system and a program used for the judgment. A communication device generates a four-value FSK symbol by adding a redundant bit to a bit of the most important part of encoded audio... | 09/28/2010 |
| 7792183 | Digital quality index for QAM digital signals The present invention relates to a system for calculating a digital quality index (DQI), which provides a rating on a predetermined scale, indicative of the impairments in a received quadrature amplitude modulated (QAM) signal in a CATV cable system. The DQI system ... | 09/07/2010 |
| 7764730 | Low bias estimation of small signal-to-noise ratio A method implemented by a user equipment includes selecting a first estimate of a signal-to-noise (SNR) ratio, calculating a first amplitude and first noise variance, calculating a second amplitude and a second noise variance, calculating a second SNR, calculating a... | 07/27/2010 |
| 7724813 | Method and apparatus for transmit power control According to method and apparatus embodiments taught herein, power control feedback is generated for a control channel signal that is received in conjunction with a reference channel signal based on the reference channel's signal strength or quality, and an estimate... | 05/25/2010 |
| 7715469 | Link adaptation in wireless networks for throughput maximization under retransmissions The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently alloc... | 05/11/2010 |
| 7702010 | System for monitoring the quality of a communications channel with mirror receivers A system is presented that monitors the quality of a communications channel with mirror receivers. A first receiver and a second receiver, coupled in parallel with the first receiver, receive a data signal transmitted over the communications channel. The second rece... | 04/20/2010 |
| 7643547 | Radio quality estimation system, base station, mobile station, and radio quality estimation method An object of the present invention is to provide a radio quality estimation system, a base station, a mobile station, and a radio quality estimation method whereby, regardless of influence of fading, a radio quality of a predetermined measurement period is more accu... | 01/05/2010 |
| 7639735 | Method and apparatus for signal to noise ratio estimation A method and apparatus for generating a signal to noise ratio (SNR) estimate. A conditional probability distribution function (CPDF) is rectified to suppress the condition, thereby creating a biased CPDF. Conditional offset moments are computed through an analysis o... | 12/29/2009 |
| 7634000 | Noise estimator for a communications system A SINR estimator receiving a symbol stream has a delay element coupled to the symbol stream to produce a delayed symbol stream, which is also coupled to a conjugator. A first multiplier forms a product from the symbol stream and the output of the conjugator, thereaf... | 12/15/2009 |
| 7623569 | Apparatus and method for estimating interference and noise in a communication system A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone (OFDM/OFDMA/DMT) system is disclosed. A correlator correlates a plurality of sub-car... | 11/24/2009 |
| 7606299 | Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics. Interference and noise levels and true received signal levels are comp... | 10/20/2009 |
| 7590172 | Low bias estimation of small signal-to-noise ratio A user equipment includes an estimator. The estimator is configured to select a first estimate of a signal-to-noise (SNR) ratio, calculate a first amplitude and first noise variance, calculate a second amplitude and a second noise variance, calculate a second SNR, c... | 09/15/2009 |
| 7590171 | Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system An apparatus and method are provided for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA). In the communication s... | 09/15/2009 |
| 7567613 | Test method and apparatus for in-house wiring problems To test for in-house wiring problems, upstream transmission profiles are tuned automatically and remotely, and reactive downstream parameter modifications indicative for in-house wiring problems are measured. ... | 07/28/2009 |
| 7567614 | Altering power consumption in communication links based on measured noise A method, circuit and system for altering the power consumption in communication links. A type of noise and an amount of jitter in a signal transmitted across a communication link is measured. Upon determining the contribution of the measured noise to the measured j... | 07/28/2009 |
| 7564898 | System and method for selecting data rates of data signals A transceiver comprises a communication line interface, memory, and logic. The memory stores predefined noise spectra, and the logic is configured to analyze an initialization signal received from the communication line coupled to the communication line interface du... | 07/21/2009 |
| 7519113 | Noise detection device Noise detection is performed by using the output of the phase comparator that the PLL comprises. The phase comparator outputs a signal that is based on the phase difference between the output of the voltage controlled oscillator and the reference signal. The phase d... | 04/14/2009 |
| 7508869 | Apparatus method and system for characterizing a communication channel and increasing data throughput In contrast to prior are solutions that conduct an averaging operation to estimate metrics related to a communications channel such as a signal-to-noise ratio, the present invention selects a particular value such as a minimum, maximum, or median value from a distri... | 03/24/2009 |
| 7492814 | Method of removing noise and interference from signal using peak picking Removing noise and interference from a signal by calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each estimated instantaneous frequency, if necessary, to correspond to a freq... | 02/17/2009 |
| 7466749 | Rate selection with margin sharing Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the streams based on the SNR estimates, such that at least one data stream has ... | 12/16/2008 |
| 7463677 | Link adaptation in wireless networks for throughput maximization under retransmissions The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently alloc... | 12/09/2008 |
| 7453934 | Automatic receiver calibration with noise and fast fourier transform The present invention provides a method for automatic calibration of a signal path in receivers (e.g., radio frequency receivers) using a noise (and not a specific test signal) as a source and a fast Fourier transform (FFT) of the noise for correcting various parame... | 11/18/2008 |
| 7453933 | Method of estimating a signal-to-interference+noise ratio (SINR) using data samples In the method of estimating a signal-to-interference+noise ratio (SINR), either the polarities or bit values of a plurality of received data symbol samples are estimated. Then an SINR estimate is generated based on the plurality of received data symbol samples and t... | 11/18/2008 |
| 7433395 | Reliable multicarrier communication in the presence of timing phase error A method, system and apparatus for reliable multicarrier communication in the presence of timing phase error is disclosed. Phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device is measured in a signal. A Gaussian noise ... | 10/07/2008 |
| 7430237 | Decoderless bit-error-rate estimation for convolutionally encoded transmissions in wireless systems In a UMTS (universal mobile telecommunications system) based system, a wireless receiver implements “effective signal-to-noise (Eb/No) based BER estimation.” In particular, the wireless receiver comprises a rake receiver, a processor and me... | 09/30/2008 |
| 7421009 | Noise power estimation apparatus, noise power estimation method and signal detection apparatus A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a received power of the pilot signal for each path; a part for removing a ... | 09/02/2008 |
| 7418032 | Altering power consumption in communication links based on measured noise A method, circuit and system for altering the power consumption in communication links. A type of noise and an amount of jitter in a signal transmitted across a communication link is measured. Upon determining the contribution of the measured noise to the measured j... | 08/26/2008 |
