Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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 |
| 8189709 | Frequency domain equalization method for continuous phase modulated signals A method for frequency domain equalization of a cyclic CPM signal received via a channel is disclosed. In one aspect, the method includes representing the received cyclic CPM signal as a matrix model comprising a channel matrix representing influence of the channel,... | 05/29/2012 |
| 8184743 | Overlay modulation technique for COFDM signals based on amplitude offsets Systems and methods are presented for transmitting additional data over preexisting differential COFDM signals by changing the amplitude of the legacy data symbols. In exemplary embodiments of the present invention, additional data capacity can be achieved for a COF... | 05/22/2012 |
| 8175140 | Systems and methods for a multicarrier transceiver with radio frequency interference reduction A multi-carrier information transceiver that exhibits robustness against radio frequency interference (RFI) signals present in the communications channel. The transceiver includes a RFI mitigation technique that operates not only during the steady state operation of... | 05/08/2012 |
| 8175198 | Matched filter and receiver A matched filter and receiver is provided to delete the tap coefficients of a matched filter used in an OFDM receiver. In the matched filter and receiver, a transmitting signal is generated by using a symmetric series (Y) obtained from C[k]=exp[j*π*M/N*(k+0.5)^2], ... | 05/08/2012 |
| 8175134 | Radio communications system and method having decreased capability for detection by an adversary Decreased capability for detection of communications signals by an adversary is provided by applying frequency hopping, frequency chirping, and direct sequence spreading to the signals. The frequency hopping and frequency chirping can be driven by pseudo random func... | 05/08/2012 |
| 8170086 | Method and apparatus for performing signal correlation A method of computing a correlation between a pseudorandom reference code and a satellite signal is provided. The method comprises receiving a satellite signal having a repeating code modulated thereon, wherein the satellite signal comprises a pseudorange; correlati... | 05/01/2012 |
| RE43338 | 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... | 05/01/2012 |
| 8165247 | Unfolded decision-directed loop, architectures, apparatuses and systems including the same, and methods, algorithms and software for reducing latency in decision-directed loops Unfolded adaptive/decision-directed loops and correction circuits therefor, architectures, apparatuses and systems including the same, and methods, algorithms and software for reducing latency in an adaptive and/or decision-directed loop. Disclosed embodiments advan... | 04/24/2012 |
| 8160185 | Apparatus for synchronizing OFDM signal using open-loop frequency synchronization method and frequency offset estimation scheme using the apparatus There are provided an apparatus for synchronizing an OFDM signal using an open-loop frequency synchronization method, which can estimate and compensate for various types of frequency errors generated in a frequency modulation broadcasting/communication system to whi... | 04/17/2012 |
| 8160173 | 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... | 04/17/2012 |
| 8155239 | 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-... | 04/10/2012 |
| 8155171 | Multipath signal judging method, program, and multipath signal judging device A multipath signal judging method includes: performing correlation calculation for I and Q components for a reception signal as a positioning signal modulated in a spread code and a replica code; judging code phase based on the correlation calculation; calculating a... | 04/10/2012 |
| 8155254 | Methods and systems using FFT window tracking algorithm Techniques for the adjustment of a position of Fast Fourier Transform (FFT) window are provided. The adjustment may be based on the condition that the length of channel impulse response is larger than the length of cyclic prefix. The technique may determine a positi... | 04/10/2012 |
| 8149976 | Precise frequency estimation of short data bursts The invention performs frequency estimation over both the burst preamble, during which known symbols are transmitted, and also during the burst's data packet, which is subsequent to the preamble and extracted by the local detector. During the preamble, an initial fr... | 04/03/2012 |
| 8149893 | Reliable wireless communication system using adaptive frequency hopping A method and system, the method including determining a frequency quality measurement value for each of a plurality of frequencies a network coordinator can use in a frequency hopping sequence for communicating with a client, classifying each of the plurality of com... | 04/03/2012 |
| 8149931 | Multi-carrier transmission process and system in a difficult environment with optimisation of emission power The invention proposes a data transmission process, from a first unit (1) situated at a predetermined depth of an oil well to a second unit (2) situated at the surface of this well, the process comprising a digital-analog conversion stage (8) of... | 04/03/2012 |
| 8149970 | Multiple input, multiple output channel, digital receiver tuner The present invention teaches a compact and highly integrated multiple-channel digital tuner and receiver architecture, suitable for widespread field deployment, wherein each receiver demodulator channel may be remotely, automatically, dynamically, and economically ... | 04/03/2012 |
| 8144808 | Codebook generating method and apparatus for generating a codebook for multi-polarized multiple-input multiple-output (MIMO) systems A communication apparatus and method include: selecting, as a precoding matrix, one of pre-stored at least one matrix Wi, where i is a natural number, and precoding a data stream desired to be transmitted based on the precoding matrix, wherein each diagon... | 03/27/2012 |
| 8144753 | Detection device of a spreading code and a timing, and a method thereof An A/D converted and inputted signal is stored in a memory. A sliding correlator sequentially reads the signal stored in the memory and despreads this signal. A despreading timing is adjusted and then the candidate for a despreading code is outputted from a code gen... | 03/27/2012 |
| 8139631 | Method for transmitting data In a method for transmitting data using a predetermined data protocol between a first electronic control unit and a second electronic control unit in a motor vehicle, in which a data protocol is transmitted in the form of a pulse-pause sequence via a single electric... | 03/20/2012 |
| 8139658 | Method and system for providing a time equalizer for multiline transmission in communication systems A method and system for multiline transmission in communications systems are described. Eigenvalues are calculated to maximize equalized channel impulse response (1010). Eigenvectors associated with dominant eigenvalues are identified (1020). The eigen... | 03/20/2012 |
| 8139695 | Combined channel coding and space-block coding in a multi-antenna arrangement Enhanced performance is achieved by combining channel coding with the space-time coding principles. With K synchronized terminal units transmitting on N antennas to a base station having M≧K receive antennas, increased system capacity and improved performance are ... | 03/20/2012 |
| 8139699 | Process for preamble detection in a multi-stream 802.16E receiver A preamble detector for a plurality of streams of baseband digitized signals has a plurality of preamble processors, each preamble processor coupled to an input and generating an output. Each preamble processor has an input coupled to a first delay, the output of th... | 03/20/2012 |
| 8130888 | Calibrating a phase detector and analog-to-digital converter offset and gain The present invention includes apparatus and methods to calibrate a phase detector and an analog-to-digital converter (ADC) offset and gain. In one such embodiment, an apparatus includes a phase detector to generate an error pulse and a reference pulse, a combiner t... | 03/06/2012 |
| 8130868 | Radio communication apparatus, radio communication method and program storage medium A radio communication apparatus includes: generation units generating first to mth signals; a storage storing allocation information defining that beams of different quality levels are allocated to first to mth communication apparatuses for each of first to nth subc... | 03/06/2012 |
| 8130815 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 03/06/2012 |
| 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 |
| 8130874 | By-pass arrangement of a low noise amplifier The invention relates to an arrangement for bypassing a low noise amplifier unit in the front stage of a radio receiver, especially intended for the base stations of mobile communication networks. The front stage includes, in succession, a divider (420), an a... | 03/06/2012 |
| 8121217 | Method and apparatus for transmitting data in a time division duplexed (TDD) communication system Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a ... | 02/21/2012 |
| 8116386 | Method, apparatus and computer program product for providing improved gray mapping An apparatus for providing improved gray mapping may include a processor. The processor may be configured to divide gray value byte data into high priority portions and low priority portions distributed as constellation points in a constellation matrix and to provid... | 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 |
| 8111733 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 02/07/2012 |
| 8111739 | Detector for low frequency offset distortion A system for removing low frequency offset distortion from a digital signal, the system comprising an analog-to-digital converter to convert an analog frequency signal associated with an optical storage medium to a digital frequency signal; an equalizer to equalize ... | 02/07/2012 |
| 8111780 | Codebook generating method and apparatus for generating a codebook for multi-polarized multiple-input multiple-output (MIMO) systems A communication apparatus and method include: selecting, as a precoding matrix, one of pre-stored at least one matrix Wi, where i is a natural number, and precoding a data stream desired to be transmitted based on the precoding matrix, wherein each diagon... | 02/07/2012 |
| 8111732 | Method for generating a reference signal sequence using grouping Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in t... | 02/07/2012 |
| 8107516 | Power line communications apparatus Apparatus and system for communicating data via a power line. The apparatus comprises a transmitter comprising a modulator for generating a second digital signal based on input data; a digital buffer for amplifying the second digital signal to generate a third digit... | 01/31/2012 |
| 8107518 | Stream weight estimation and compensation in SIMO/MIMO OFDM receivers A process for equalizing streams of OFDM subcarrier data computes the noise variance for each stream, and forms a stream weighting coefficient by equalizing the noise variance, such that for a first stream having a noise variance σ1 and a second stream h... | 01/31/2012 |
| 8107571 | Parameterized filters and signaling techniques Filter taps for filters are specified by filter coefficient parameters. The filter taps are greater in number than the coefficient parameters from which the filter taps are calculated. For example, two coefficient parameters are used to specify a four-tap filter. Fi... | 01/31/2012 |
| 8102909 | Systems and methods that provide frequency domain supplemental training of the time domain equalizer for DMT Using a known or later developed time domain equalizer coefficient training algorithm, a least square solution for the time domain equalizer coefficients is taken at a starting point and iteratively improved on. In particular, the improvement is directed towards max... | 01/24/2012 |
| 8098716 | Method and apparatus for providing an energy-based signal tracking loop A method and apparatus for tracking a signal comprises correlating a digital signal with a code using a hypothesis at a plurality of frequencies and at least one delay to produce correlation results, measuring an energy value of the correlation results, adjusting at... | 01/17/2012 |
