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| Number | Title | Issue Date |
| 8077763 | Full-duplex radio frequency echo cancellation A system comprising a transmitter element creating an interrogation signal and transmitting the interrogation signal and a receiver element receiving a reflection signal of the interrogation signal and combining the reflection signal and a feedback signal to cancel ... | 12/13/2011 |
| 8064503 | Multicarrier communication apparatus and multicarrier communication method A multicarrier communication apparatus and the like wherein the arithmetic amount required for calculating a reception weight by which a multicarrier signal is to be multiplied is suppressed, while the reception characteristic for the multicarrier signal is improved... | 11/22/2011 |
| 8040940 | Transmitter/receiver device that converts serial and parallel signals and method of testing thereof A transmitter/receiver device includes: a transmitter unit including a parallel/serial converting circuit, a waveform deteriorating circuit, and a transmitter circuit; and a receiver unit including a receiver circuit, a serial/parallel converting circuit, and an err... | 10/18/2011 |
| 8000382 | I/Q imbalance estimation and correction in a communication system Certain aspects and embodiments provide for accurate measurement and estimation of imbalances between in-phase (I) and quadrature (Q) components of a complex baseband signal. The accuracy of I/Q phase imbalance estimates may be enhanced by conducting them on a trans... | 08/16/2011 |
| 7995644 | Device, method and protocol for private UWB ranging An apparatus, system, method and computer program product for secure ranging between at least two devices in radio communications with each other. In particular, an apparatus, system, method and computer program product for secure ranging between at least two device... | 08/09/2011 |
| 7936809 | Economical, scalable transceiver jitter test Any number of transceiver channels is tested for jitter generation/tolerance simultaneously. Tested channels use a serial loopback path to connect a transceiver transmit channel to a transceiver receiver channel. Both the transmitter and receiver PLLs are connected ... | 05/03/2011 |
| 7856048 | On-chip IQ imbalance and LO leakage calibration for transceivers The disclosure can provide methods and systems for autocalibrating a transceiver. The method can include upconverting a bandpass input signal by mixing the bandpass input signal with a first local oscillator signal to form an initial transmitter signal. The initial ... | 12/21/2010 |
| 7782928 | Method and apparatus for self-calibration in a mobile transceiver Disclosed is a method and an apparatus for self-calibrating direct current (DC) offset and imbalance between orthogonal signals, which may occur in a mobile transceiver. In the apparatus, a transmitter of a mobile terminal functions as a signal generator, and a rece... | 08/24/2010 |
| 7733949 | Wireless communications system with reduced sideband noise and carrier leakage A wireless communications system is provided with reduced sideband noise and carrier leakage. In the system, at least one transmitter modulates at least one input signal with a first carrier to generate a modulated output signal, and at least one receiver receives t... | 06/08/2010 |
| 7702006 | Adjustment of transmission data rate based on data errors and/or latency Aspects of the present disclosure are directed to providing flexible and efficient communication by dynamically adjusting a transmit data rate in response to data status feedback. Such feedback may include information regarding data errors and/or latency. A first co... | 04/20/2010 |
| 7684476 | Wireless communication system and method with feedback signals containing channel estimate values A wireless communication system is disclosed that transmits a feedback signal containing a channel estimate value between a first wireless communication device and a second wireless communication device. The first wireless communication device that transmits the fee... | 03/23/2010 |
| 7672363 | Method of and system for determining the delay of digital signals A method of and system for determining the time required for a digital bit or bit stream to traverse a round-trip path from a source transceiver to at least one destination transceiver and back is disclosed. The relative timing of the transmitted bit or bit stream i... | 03/02/2010 |
| 7672364 | Self-calibration method for use in a mobile transceiver A method is provided for self-calibrating the mismatch and the direct current (DC) offset occurring in a mobile transceiver. The transmitter of the mobile terminal is used as a signal generator and the receiver thereof is used as a response characteristic measurer. ... | 03/02/2010 |
| 7672365 | Apparatus and methods for communicating using symbol-modulated subcarriers Apparatus and methods for selecting a transmit power level and subcarrier modulation assignments based on measured channel conditions to achieve a performance level for communications over a symbol-modulated subcarrier communication channel are provided. In some emb... | 03/02/2010 |
| 7564895 | Method and apparatus for monitoring channel frequency response Method and apparatus for retrieving the channel frequency response H(f), the noise N(f), measured at initialization and the signal to noise ratio SNR(f) measured at show time on a per bin basis, in the upstream or downstream direction. Initialization H(f) is used fo... | 07/21/2009 |
| 7489724 | System and method for connecting a host and a target A system for controlling communications between a host and a target, the system having a data input for receiving a data signal, a clock input for receiving a clock signal, an oversampling circuit for sampling a received data signal and generating a control signal t... | 02/10/2009 |
| 7444558 | Programmable measurement mode for a serial point to point link A serial point to point link that communicatively couples an integrated circuit (IC) device to another IC device is initialized by transferring a training sequence of symbols over the link. Registers of the IC device are programmed, to set a symbol data pattern and ... | 10/28/2008 |
| 7426235 | Method of adaptive equalization for high-speed NRZ and multi-level signal data communications Circuitry for equalizing a high data rate serial data stream that receives low frequency and high frequency test tones, accurately measures an amount of attenuation experienced by the high frequency test tone in relation to the low frequency test tone, and according... | 09/16/2008 |
| 7426599 | Systems and methods for writing data with a FIFO interface Application Specific Integrated Circuit (“ASIC”) devices, such as Field Programmable Gate Arrays (“FPGAs”), may be interconnected using serial I/O connections, such as high speed multi-gigabit serial transceiver (“MGT”) connections. For example, serial I... | 09/16/2008 |
| 7385959 | Power-efficient channel condition feedback for OFDM channels A wireless data communications device having a corresponding method and computer program comprises a Multiple Input, Multiple Output (MIMO) transceiver to communicate on an Orthogonal Frequency Division Modulation (OFDM) channel; a measurement circuit having an acti... | 06/10/2008 |
| 7379494 | MAC protocol employing multiple data rates Method and apparatus for combining high data rate traffic and low data rate traffic on a common transmission medium while maximizing efficient use of available spectrum. Since spectrum is an economically valuable resource and transport of data generates revenue, the... | 05/27/2008 |
| 7363402 | Data communications architecture employing parallel SERDES channels A data communications architecture employing serializers and deserializers that reduces data communications latency. In an illustrative implementation, the data communications architecture communicates data across communications links. The architecture maintains var... | 04/22/2008 |
| 7362826 | Receiver including an oscillation circuit for generating an image rejection calibration tone A receiver circuit includes an oscillator circuit configured to generate a calibration tone and a phase locked loop (PLL) reference signal. An output frequency of the VCO may be divided by respective amounts to derive a desired calibration tone frequency and a desir... | 04/22/2008 |
| 7360127 | Method and apparatus for evaluating and optimizing a signaling system A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive... | 04/15/2008 |
| 7356093 | Enhanced wireless communication system and method thereof A communications system that comprises a channel encoder for encoding a plurality of information bits, a mapping unit coupled to the channel encoder for mapping the plurality of information bits into a first set of quadrature phase shift keying (QPSK) symbols and a ... | 04/08/2008 |
| 7349506 | Semiconductor integrated circuit and method for testing the same A method and semiconductor integrated circuit in which a receiver receives reception data and executes reception processing on the basis of a clock signal supplied from a PLL and a transmitter which receives parallel transmission data and executes serial transmissio... | 03/25/2008 |
| 7343431 | Method, apparatus, and computer-readable medium for disabling BIOS-provided console redirection capabilities in the presence of an incompatible communications device Methods, systems, apparatus, and computer-readable media are provided for disabling a BIOS-provided console redirection facility in the presence of an incompatible device. According to the method, a determination is made as to whether a port has been enabled for uti... | 03/11/2008 |
| 7343535 | Embedded testing capability for integrated serializer/deserializers Testing capability for an integrated circuit having more than one serializer/deserializer (SERDES) block includes embedding a tester within each block, so that the blocks can be tested independently and concurrently. In one embodiment, a tester includes a functional... | 03/11/2008 |
| 7340660 | Method and system for using statistical signatures for testing high-speed circuits A method and system for testing a high-speed circuit is disclosed. The method and system include obtaining a high-speed statistical signature of the high-speed circuit using a conventional tester. The method and system further include comparing the high-speed statis... | 03/04/2008 |
| 7330502 | Input/output circuit and semiconductor integrated circuit An input/output circuit includes a reference clock generator configured to generate a reference clock. A signal transmitter is configured to transmit serial data in synchronization with one of the reference clock and a test clock. A signal-receiving circuit is confi... | 02/12/2008 |
| 7327691 | System and method for satellite-based transmission of voice signals using an otherwise dedicated wireless channel In a wireless communication system (20) configured for default communication of subsectional signals of a first transmit signal (72/73) over multiple wireless channels (46), a signal selector (82) and method (138) detect an intent ... | 02/05/2008 |
| 7321616 | Method and apparatus for increasing soft modem capacity A method and apparatus for reducing processing requirements of a pool of soft modems is disclosed. In one embodiment, the method comprises queuing one or more retrain requests and responding to the queued retrain requests within a period of time to one or more modem... | 01/22/2008 |
| 7321614 | Apparatus and methods for communicating using symbol-modulated subcarriers Apparatus and methods for selecting a transmit power level and subcarrier modulation assignments based on measured channel conditions to achieve a performance level for communications over a symbol-modulated subcarrier communication channel are provided. In some emb... | 01/22/2008 |
| 7319716 | Transmitter image suppression in TDD transceivers In a transceiver comprising a time-division-duplex (TDD) of transmit and receive functions, the characteristics of unwanted image signal energy being transmitted from the transceiver are determined, and thereafter feedback is provided to the transmitter to reduce th... | 01/15/2008 |
| 7319667 | Communication system with priority data compression A data compression system that dynamically adapts the degree of compression used in response to the priority of the data to be compressed is provided by virtue of one embodiment of the present invention. In one embodiment, only low priority data is compressed while ... | 01/15/2008 |
| 7313178 | Transceiver for receiving and transmitting data over a network and method for testing the same The present invention provides a transceiver for receiving and transmitting data over a network, and a method for testing the same. In particular, the present invention provides a physical layer transceiver having a built-in-self-test (BIST) device that allows for, ... | 12/25/2007 |
| 7310754 | Integrated test circuit, a test circuit, and a test method for performing transmission and reception processing to and from a first and a second macro block at a first frequency A macro block MB2 including a physical-layer circuit PHY for communications performs transmission and reception processing to and from a macro block MB1 at a clock frequency CF1. A test circuit TC includes a test transmission buffer TXB that sto... | 12/18/2007 |
| 7295618 | Automatic adaptive equalization method and system for high-speed serial transmission link A data communication system includes a transmitter unit and a receiver unit. The transmission unit has a transmission characteristic that is adjustable in accordance with equalization information. The transmission unit is operable to transmit a predetermined signal ... | 11/13/2007 |
| 7295639 | Distributed adaptive channel bonding control for improved tolerance of inter-channel skew A method and apparatus for improving tolerance of inter-channel skew in channel bonded communications links includes designating a master channel and one or more slave channels. Each slave channel develops its own model of skew relative to the master channel. When i... | 11/13/2007 |
| 7289610 | Digital subscriber line service over loaded loops The preferred embodiments of the present invention generally provide improved communications over a subscriber loop that is loaded with at least one and potentially a plurality of load coils. The preferred embodiments of the present invention will work over loaded s... | 10/30/2007 |
