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7639745 |
Serial data link with automatic power down
A serial data link ( 10 ) includes a transmitter ( 12 ) using a differential transmitter cell ( 20 ) to transmit data using differential signals and a receiver ( 14 ) using a differential receiver...
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7613244 |
System for communicating channel quality information
In transmitting channel quality information (CQI) by a mobile station (MS) in a communication system, the mobile station receives from a base station (BS) information of an allocation of a CQI...
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7603095 |
Apparatus and method of switching intervals
The present invention provides a way of hysteretic switching for efficiently reducing the heavy switching between two adjacent coarse intervals. The present invention disposes a number of fine...
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7590207 |
Modular serial interface in programmable logic device
A serial interface for a programmable logic device can be used as a conventional high-speed quad interface, but also allows an individual channel, if not otherwise being used, to be programmably...
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7587202 |
Method for conducting digital interface and baseband circuitry tests using digital loopback
In a mobile device having a primary baseband circuit and a secondary baseband circuit and an interface between the primary baseband circuit and a secondary baseband circuit, a method for testing...
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7571363 |
Parametric measurement of high-speed I/O systems
A phase comparator is used to test a device under test comprising an input/output (I/O) circuit by applying a signal to the device under test; extracting a phase signal from the phase comparator;...
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7564904 |
Apparatus for and method of detection of powered devices over a network
A novel mechanism for detecting the presence of powered devices over a network. A unique, infinite pseudo-random sequence of pulses are generated and transmitted over the network to the link...
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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...
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7564893 |
Test system and method for parallel modulation error measurement of transceivers
A test system is capable of performing parallel modulation error measurement of transceivers using a loop-back configuration. Each transceiver includes a transmitter and a receiver. A signal...
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7545866 |
Dual loop signal quality based link adaptation
A communications link is adapted based on a quality estimate for a signal transmitted via the communications link. The method comprises receiving and demodulating the transmitted signal, assessing...
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7542514 |
Method and device for adaptive modulation and coding based on second order statistics of channel information
The present invention discloses a method and device for adaptive modulation and coding based on second order statistics of channel information in OFDM system, characterized in that, by means of...
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7539461 |
Radio apparatus, and method and program for controlling spatial path
A PDMA terminal establishes communication by forming a plurality of spatial paths to another single radio apparatus. A plurality of antennas constituting an array antenna are divided into a...
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7532665 |
Wireless communication apparatus and method, and computer program
A wireless communication apparatus for transmission/reception of a wireless communication signal, including first and second circuits that process a transmission/reception signal, an oscillator...
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7522672 |
Digital branch calibrator for an RF transmitter
The present invention provides a digital (computational) branch calibrator which uses a feedback signal sensed from an RF transmit signal path following the combining stage of LINC circuitry of a...
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7493095 |
PMA RX in coarse loop for high speed sampling
A device and a method for processing high data rate serial data includes circuitry for recovering a clock based on the high data rate input data stream. A transceiver includes a coarse loop of a...
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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...
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7486722 |
Bandwidth efficient cable network modem
A MUD enabled cable modem that provides efficient use of cable television network bandwidth in the presence of interference and noise is disclosed. The modem design provides for compatibility with...
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7472318 |
System and method for determining on-chip bit error rate (BER) in a communication system
A method and system for evaluating performance of a device by on-chip determination of BER may include establishing and generating PRBS test packets in a closed communication path internally within...
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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....
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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....
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7277512 |
Systems and methods for accounting for intercarrier interference in transmission systems
A device that transmits data using discrete multitone modulation includes a memory that stores intercarrier interference (ICI) information for each of the tones used to transmit data. The device...
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7277492 |
Transmission apparatus, transmission control method, reception apparatus, and reception control method
Radio resources are saved. The base station 101 determines a possibility of transmitting data to the terminal 102 , and transmits the indicator indicating the possibility of transmitting the...
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7277477 |
Zero overhead back channel for adaptive transmit filter updates in SerDes transceivers
A method and system that communicates adaptive transmit-side filter updates between a receiver and transmitter inserts additional versions of control codes into a back channel for encoding updates....
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7272756 |
Exploitive test pattern apparatus and method
Communications equipment can be tested using a test pattern that is modified compared to, and more exploitive than, a standard test pattern. Test patterns can be employed that have lengthened or...
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7236778 |
System and method for testing transceivers
A method includes communicating a first signal at a transmitter. The first signal has a first frequency. The method also includes receiving a second signal at a receiver. The second signal has a...
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7227888 |
Testing loops for channel codecs
A method for measuring the performance of decoding in a telecommunication system comprising a decoder and a testing apparatus for supplying test data to the decoder. A test data comprising channel...
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7212496 |
Remote test unit
A remote test unit (RTU) and method of operation are provided for utilizes the ability of an access matrix ability to route signals. The RTU can emulate a central Digital Subscriber Line Modem...
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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...
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7203225 |
Method of phase controlling of a data signal, counter clock circuit arrangement, and interface device
The invention relates to a method of phase controlling a data signal transmitted from a data source to a data sink using a counter clock approach, wherein the phase of a data sink clock is compared...
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7203459 |
Mode adaptation in wireless systems
Methods, apparatus, and systems for mode assignment and mode adaptation to channel conditions are provided which are based on estimations of real signal-to-noise ratios (SNR) for each frequency...
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7200196 |
Interpolation based timing recovery
The present invention provides a solution that eliminates both the voltage-controlled oscillator (“VXCO” 105 ) and its associated D/A converter ( 120 ) from the timing recovery scheme, thereby...
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7194037 |
Active replica transformer hybrid
A communication circuit includes a near end replication transmitter and a hybrid having an input in communication with an output of the near end transmitter. A high pass filter is responsive to the...
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7188196 |
Method and apparatus for playing analog audio to multiple codec outputs
Method and apparatus for playing analog audio in an electronic audio system having multiple audio codecs, only one of which has a direct hardware connection to the analog audio source. First analog...
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7180935 |
System and method for compensating for delay time fluctuations
A method is provided for time control of data transmission from a first module to a further module. An electronic system also is provided having a first module from which data is sent via a...
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7162732 |
System and related methods facilitating the detection and acquisition of a data channel in a cable modem
A method is presented comprising receiving a broadband signal at a receiver in accordance with a first modulation technique, tuning the receiver to a channel within the broadband signal, and...
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7111208 |
On-chip standalone self-test system and method
A method and system are disclosed for providing standalone built-in self-testing of a transceiver chip. The transceiver chip includes packet generators for generating test packets and packet...
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7099278 |
Line loop back for very high speed application
Method and circuitry for performing a line loop back test includes a receiver, a deserializer, and a low speed parallel loop back data multiplexer selects either the low speed parallel data from...
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7095996 |
Wireless communication system, and demodulation method and data rate control method therefor
A transmitter and a receiver share a maximum number of transmission bits per symbol as a parameter. The transmitter modulates an encoded and interleaved transmission signal in accordance with a...
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7093172 |
System and method for determining on-chip bit error rate (BER) in a communication system
A test packet generator ( 225 a ) within a physical layer device ( 230 ) may generate test packets to be communicated over a closed communication path established within the physical layer device (...
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7082557 |
High speed serial interface test
A high speed, two-way serial interface with a scrambler and de-scrambler may be tested by sending a single word repeatedly through the scrambler to create a pseudo-random sequence. The...
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