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| Number | Title | Issue Date |
| 7203223 | Method of radio channel simulation and channel simulator The invention relates to a method of performing channel simulation and a channel simulator. The channel simulation is performed digitally. At least a section of a signal (206) to be fed to simulation is transformed by convolution transformation from time spac... | 04/10/2007 |
| 7203460 | Automated test of receiver sensitivity and receiver jitter tolerance of an integrated circuit An automated test system (20) for testing a high-speed communications integrated circuit (10), such as a serializer/deserializer, is disclosed. The system (20) is able to test the parameters of receiver jitter tolerance and receiver sensitivity ... | 04/10/2007 |
| 7203472 | Method and apparatus providing calibration technique for RF performance tuning A method is disclosed for operating a RF receiver of a communications equipment, as is circuitry for implementing the method. The method includes, while operating under the control of a data processor of the communications equipment, generating a calibration signal;... | 04/10/2007 |
| 7203461 | Adaptive channel quality estimation algorithm to support link adaptation RF communications received by a wireless terminal from a servicing base station are used to determine the channel quality such as reported bit error probability (BEP). The RF communications may be in the form of RF bursts that are part of a data frame. An estimated ... | 04/10/2007 |
| 7199818 | Status ribbon for display for multiple channels/codes A status ribbon to display a signal characteristic for multiple channels/codes within a region of interest has a plurality of stripes. A value for each stripe is represented by a trait of the stripe, such as color or brightness. The trait may represent a range of a ... | 04/03/2007 |
| 7200170 | High speed I-O loopback testing with low speed DC test capability A loopback circuit for testing low and high frequency operation of integrated circuit transmitter and receiver components. First and second resistors forming a first branch of the circuit are series-connected between first and second circuit ports. Third and fourth ... | 04/03/2007 |
| 7200171 | System and method for estimating initial channel quality in a multirate system A method of estimating initial channel quality in a receiver when allocated a new channel in order to select an optimal codec mode in a multi-rate service is disclosed. One implementation initially fills the filter state with the first received channel quality measu... | 04/03/2007 |
| 7200177 | Multi-carrier transmission apparatus, multi-carrier reception apparatus, and multi-carrier radio communication method A subcarrier transmission ON/OFF control system based on an MC-CDMA system capable of improving information transmission efficiency and reception performance while keeping the number of transmission bits constant. Furthermore, a subcarrier transmit power control sys... | 04/03/2007 |
| 7197692 | Robust erasure detection and erasure-rate-based closed loop power control Techniques for performing erasure detection and power control for a transmission without error detection coding are described. For erasure detection, a transmitter transmits codewords via a wireless channel. A receiver computes a metric for each received codeword, c... | 03/27/2007 |
| 7196859 | Processing techniques for time-based servo patterns Techniques are described for accurately processing playback signals of time-based servo patterns recorded on a data storage medium. In particular, techniques are described for determining values for signal peaks within a playback signal of a time-based servo pattern... | 03/27/2007 |
| 7197288 | Method and system of spread spectrum modulation A method and system of communicating between a base station and a mobile station is disclosed. The base station may be the core of a cell site, which is defined by radio frequency radiation patterns. The cell site may be divided into a number of sectors, each define... | 03/27/2007 |
| 7197067 | Parameter selection in a communication system A method is provided for automatically optimizing parameter selection in a communication system having one or more channels for transmitting and receiving signals by the steps of: receiving a signal from a channel; characterizing impairments in the channel while gat... | 03/27/2007 |
| 7197069 | Multi-pair gigabit ethernet transceiver having adaptive disabling of circuit elements Various systems and methods providing high speed decoding, enhanced power reduction and clock domain partitioning for a multi-pair gigabit Ethernet transceiver are disclosed. ISI compensation is partitioned into two stages; a first stage compensates ISI components i... | 03/27/2007 |
| 7197092 | Amplitude-offset invariant template detection for pulse position estimation; methods, systems and program products A method and system of determining and correcting modulation and offset effects in a received signal. A signal [s(n)] is received subject to modulation effects A on pulse shape or peak [p(n)] and vertical offset B due to multipath where “n” is a pulse rate or sa... | 03/27/2007 |
| 7197458 | Method and system for verifying derivative digital files automatically A method and apparatus for verifying automatically that a plurality of derivative audio (or other multimedia) files have acceptable sound quality. In one embodiment, each derivative file is compared on a byte-by-byte basis to a corresponding original file to generat... | 03/27/2007 |
| 7194753 | System and method for efficiently tuning to channels of a variety of different broadcast types A tuning system is described that is capable of receiving a number of different broadcast types such as analog or digital satellite, cable, Internet, and terrestrial airwave broadcasts. The tuning system stores service records, each service recording containing info... | 03/20/2007 |
| 7194024 | Method for adaptive hybrid selection during ADSL modem training The methodology accomplishes adaptive hybrid selection during ADSL modem training. The adaptive hybrid selection method maximizes performance for ADSL modems in the presence of various impairments on the line by optimally selecting the appropriate hybrid based on li... | 03/20/2007 |
| 7190718 | Method and apparatus for determining a receiver sampling phase for use in diagnosing a channel An apparatus for processing a received signal includes an analog-to-digital converter (ADC) configured to produce a sampled signal from a received signal using a candidate sampling phase. An adaptive filter includes adaptive filter coefficients and is configured to ... | 03/13/2007 |
| 7190931 | Receiver calibration apparatus, method, and system A receiver is calibrated using a transmitter that can output a plurality of substantially constant amplitude signals. ... | 03/13/2007 |
| 7187736 | Reducing interference in a GSM communication system A method for reducing interference in a desired signal in a GSM communication system uses a finite-impulse-response filter for alternate linear equalization. The method includes a first step (300) of inputting a burst of data of a received waveform including ... | 03/06/2007 |
| 7184777 | Server and multiple sensor system for monitoring activity in a shared radio frequency band An intelligent spectrum management (ISM) system and method are provided that includes sophisticated features to detect, classify, and locate sources of RF activity. The system comprises one or more sensors positioned at various locations in a region where activity i... | 02/27/2007 |
| 7184716 | Low cost/low power analog transceiver architecture A time division duplex (TDD) single sideband (SSB) transceiver includes a transmitter adapted to input an analog audio signal, sample the analog audio signal, and to output an SSB frequency shift keyed (FSK) signal corresponding to the analog audio signal, the SSB F... | 02/27/2007 |
| 7184469 | Systems and methods for injection of test jitter in data bit-streams A method for injecting test jitter in a data bit stream comprises modulating first and second voltage generators to control a rise and fall times of an output signal, respectively. A pair of input voltages are received by a differential pair. At least one current si... | 02/27/2007 |
| 7184724 | System and method for frequency translation using an image reject mixer Frequency translation, such as frequency up conversion of a video baseband or intermediate frequency to a desired frequency division broadcast channel, is provided utilizing a single sideband or image reject mixer and filtering having relaxed selectivity requirement... | 02/27/2007 |
| 7184711 | Maintenance system for a telecommunication installation The invention provides a portable and autonomous assistance device to derive information on faults in a private telecommunication installation comprising particularly equipment units to assist the client owning the installation in maintaining the latter. A maintenan... | 02/27/2007 |
| 7180966 | Transition detection, validation and memorization circuit A transition detection, validation and memorization (TDVM) circuit detects the position of a transition in a stream of serially transmitted binary data (bits) that are over sampled and generates a control signal indicating which sampled signal represents the best da... | 02/20/2007 |
| 7180969 | Efficient reduced complexity windowed optimal time domain equalizer for discrete multitone-based DSL modems An algorithm for computing an efficient, reduced complexity, windowed optimal linear time domain equalizer for a dispersive channel comprises the steps of determining a window of maximum energy in the impulse response of length equal to or less than a number of cycl... | 02/20/2007 |
| 7180937 | Method for determining imbalance in a vector signal modulator A method of determining imbalance in a vector signal modulator. First and second channels of a vector signal modulator are stimulated with a multi-tone signal having a power versus frequency spectrum having numerous of frequencies. In response to the stimulation, an... | 02/20/2007 |
| 7180913 | Transparent error count transfer method and apparatus It is proposed that currently unused portions of transport overhead in frames sent on a high-speed outgoing channel be used to carry error count information from each of four low-speed input channels. At a 4:1 combiner, error monitoring bytes are extracted from tran... | 02/20/2007 |
| 7177593 | Estimating communication quality A method for estimating quality of communications between a transmitter and a receiver over a communications link operable to carry data in at least one of a plurality of different compressed forms, the method comprising: detecting an error rate of the communication... | 02/13/2007 |
| 7173914 | Communication node receipt of node-output information from processorless central equipment A first communication node of a plurality of communication nodes connected with processorless central equipment in a system sends one or more first portions of node-output information to the processorless central equipment. One or more additional communication nodes... | 02/06/2007 |
| 7173916 | Wireless access system using multiple modulation formats in TDD frames and method of operation There is disclosed a radio frequency (RF) modem shelf for use in a fixed wireless access network comprising a plurality of base stations capable of bidirectional time division duplex (TDD) communication with wireless access devices disposed at a plurality of subscri... | 02/06/2007 |
| 7173899 | Training and synchronization sequences for wireless systems with multiple transmit and receive antennas used in CDMA or TDMA systems Orthogonal sequences can be developed and used for use training and synchronizing in CDMA and TDMA systems. In particular, once a sequence is developed that has the length of the product of the channel length and the number of transmit antennas, the sequence is offs... | 02/06/2007 |
| 7173981 | Dual layer signal processing in a layered modulation digital signal system Systems and methods for receiving layered modulation for digital signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital co... | 02/06/2007 |
| 7171161 | System and method for classifying signals using timing templates, power templates and other techniques A system and method for classifying signals occurring in a frequency band. One or more characteristics of one or more signals in the frequency band are detected using any suitable technology, such as a device that can generate characteristics of signal pulses detect... | 01/30/2007 |
| 7171165 | Method for determining a transmission rate on the reverse common signaling channel of a wireless system A mobile terminal selects a transmission rate for the reverse common signaling channel in response to at least one mobile-terminal-measured metric that is associated with the RF conditions of the channel. The mobile terminal is provided with information, where the i... | 01/30/2007 |
| 7171240 | Mobile communication apparatus with multiple transmission and reception antennas and mobile communication method therefor A mobile communication apparatus with multiple transmission and reception antennas and a mobile communication method therefore including a base station that restores long-term and short-term information from a received feedback signal, spatially processes dedicated ... | 01/30/2007 |
| 7168021 | Built-in test circuit for an integrated circuit device An integrated circuit device can be tested using a built-in test circuit, in the IC device, that tests the operation of an I/O cell. The built-in test circuit includes a pattern generator for generating a series of simulation signals. The built-in test circuit succe... | 01/23/2007 |
| 7168029 | Method for testing a universal serial bus host controller A chip test method is suitable for testing a universal serial bus host controller. First, the host controller and the client device are individually set in a test mode. Next, the client device performs a client-side test preparation action. In addition, the host con... | 01/23/2007 |
| 7167684 | Rate control for multi-channel communications systems Techniques and apparatuses to determine a set of rates for a set of data streams to be transmitted in a multi-channel communication system. A group of transmission channels to be used for each data stream is initially identified. An equivalent system for each group ... | 01/23/2007 |
