Abstract: Methods and apparatus are provided for trimming one or more clock buffers in a clock and data recovery system in a receiver using a phase shift of the transmit data. At least one clock buffer is trimmed by synchronizing the clock and data recovery system to a transmit clock received from a transmitter. A transmit data signal that is received from the transmitter is then sampled using at least a first latch in the receiver. A phase of the transmit data signal is adjusted in the transmitter until values sampled by the first latch satisfy a first predefined criteria (such as approximately 50% binary ones and 50% binary zeroes). The phase of the transmit data signal is adjusted again to an approximate phase location of a second latch in the receiver, and the transmit data signal is sampled using the second latch. A phase of a clock buffer associated with the second latch is then adjusted until values sampled by the second latch satisfy a second predefined criteria.

Abstract: MIMO UWB Communications apparatus is configured to send out a channel estimation sequence comprising a plurality of sequentially transmitted symbols in accordance with a first band hopping sequence, sent from one antenna of the apparatus, while another antenna is transmitting another sequence of channel estimation symbols in accordance with another, complementary band hopping sequence. A legacy device will be capable of synchronizing with the channel estimation symbols sent in accordance with the first band hopping sequence, while a MIMO receiver will be able to determine channel estimates for all MIMO channels on the basis of the combined channel estimation transmissions.

Abstract: A method of determining a modulation coding scheme (MCS) for communications between a communications device and a client station (STA). The communications device determines a first MCS for transmitting data to the STA during a first sounding interval based, at least in part, on channel state information received from the STA upon initiation of the first sounding interval. The device determines a first series of packet error rates (PERs) associated with one or more data transmissions to the STA during the first sounding interval. The device then determines a second MCS for transmitting data to the STA during a second sounding interval based, at least in part, on the first PER in the first series of PERs. Specifically, the second MCS is independent of the remaining PERs in the first series.

Abstract: A voltage mode transmitter includes a resistive network and a de-emphasis value controller. The resistive network receives plural input voltages and provides plural weighting values corresponding to respective input voltages. A sum of the products of the plural input voltages and the corresponding weighting values is equal to an output voltage. The de-emphasis value controller receives a first signal. After the first signal is inverted as an inverted first signal and the inverted first signal is delayed for a time period, the de-emphasis value controller generates a second signal. The de-emphasis value controller further receives a value control signal. At least one of the plural input signals is provided by the first signal and at least one of the plural input signals is provided by the second signal according to the value control signal.

Abstract: Systems and methods for bandpass sampling of a continuous analog signal according to several embodiments can use a linear relationship between sampling frequency and intermediate frequency f IF = ( - 1 ) n + 1 ? ( - ? n 2 ? ? F S ? + f C ) where fIF is the intermediate frequency and FS is the sampling frequency of the bandpass sampling, fC is the carrier frequency, B is a bandwidth and fU is an upper frequency for the signal, and n is an integer such that 1 ? n ? ? f U B ? . The sampling frequency FS can be chosen first and the IF can be calculated without iteration using the relationship above. Or, when fIF is the most important design parameter, fIF can be selected first, and sample frequencies which will not cause aliasing can be solved by calculating FS given IF using the equation above, for all values of n so that 1 ? n ? ? f U B ? , and then selecting a particular FS. fIF can be chosen to be FS/4.

Abstract: An apparatus and a method for feeding a channel back in a wireless communication system using multiple input multiple output antennas (MIMO) are provided. The method includes receiving a signal from a transmitter and configuring a channel matrix for the received signal, configuring a basis transformed sparse channel using a sparsifying basis function with respect to the channel matrix, selecting a channel part to be fed back to the transmitter from the transformed sparse channel, and creating a codebook by quantizing the selected channel part, and feeding a codebook index corresponding to the created codebook back to the transmitter.

Abstract: A clock data recovery system is described. It includes a high pass filter for transmitting a filtered data signal in response to receiving an input data signal; an adder for summing the filtered data signal with a feedback signal, wherein the adder produces a summed input signal; a plurality of clocked data comparators for receiving the summed input signal, wherein the clocked data comparators determine an input data bit value; a plurality of clocked error comparators for receiving an error signal associated with clock recovery and DFE tap adaption; an equalization and adaptation logic for selecting an error sample such that a phase associated with the error sample is locked at h0=h1+h2; and a phase mixer for transmitting a delay in response to receiving the phase and the delay is transmitted to the clocked-data comparators and the clocked-error comparators.

Abstract: A receiver device implements enhanced data reception with edge-based clock and data recovery such as with a flash analog-to-digital converter architecture. In an example embodiment, the device implements a first phase adjustment control loop, with for example, a bang-bang phase detector, that detects data transitions for adjusting sampling at an optimal edge time with an edge sampler by adjusting a phase of an edge clock of the sampler. This loop may further adjust sampling in received data intervals for optimal data reception by adjusting the phase of a data clock of a data sampler such a flash ADC. The device may also implement a second phase adjustment control loop with, for example, a baud-rate phase detector, that detects data intervals for further adjusting sampling at an optimal data time with the data sampler.

Abstract: The various embodiments herein provide an improved system for communicating data over a wired connection. The system comprising a transmitting end, a switching circuit provided at the transmitting end to generate a propagating signal disturbance according to an input signal data received from a source network, a receiving end and a receiver circuit provided at the receiving end to detect the propagating signal disturbance and to regenerate the transmitted signal data from the received signal. The propagated signal disturbance is detected at the receiving end without a need for a common ground reference. The propagating disturbance is created by inducing an electron distribution change at one end of the wired connection and propagated along the length of the wire. The propagating disturbance is generated using one of an inductor, a capacitor and a switching device.

Abstract: A computing system includes: an inter-device interface configured to determine receiver description for representing a receiver signal corresponding to serving signal contemporaneous with an interference signal from an interference source at an interference-aware receiver; a communication unit, coupled to the inter-device interface, configured to: generate a pre-coding candidate set based on the receiver description for adjusting the serving signal or a subsequent instance thereof, determine a sum-rate condition for representing the serving signal along with the interference signal, and generate a pre-coding adjustment maximizing the sum-rate condition from the pre-coding candidate set for communicating the serving signal or a subsequent instance thereof.

Abstract: The wireless communications device has a transmit signal path including a digital-to-analog converter and associated circuitry, a receive signal path including an analog-to-digital converter, and a magnitude detector sampling the transmit signal path and providing output to a signal controller. The signal controller is configured to determine amplitude distortion and determine phase distortion based upon information from the magnitude detector, and generate an equalization filter (e.g. during power-up of the wireless communication device), based upon the determined amplitude distortion and phase distortion, for pre-distortion of regular traffic output through the transmit signal path. The approach provides compensation for both amplitude and phase based upon the sampling of an output of a magnitude detector in Radio Frequency (RF) signal paths.

Abstract: The present invention relates to a method of transmitting and a method of receiving signals and corresponding apparatus. One aspect of the present invention relates to an efficient layer 1 (L1) processing method for a transmitter and a receiver using data slices.

Abstract: The present invention relates to the field of communication and transmission of signals. In particular, the present invention relates to a new communication and/or modulation method. The present invention also relates to improving channel occupancy. The present specification discloses the adoption of phase transitions/changes in a manner that indicates a code by virtue of their position (timing) in the communication. This is referred to as Phase Position Modulation.

Abstract: A method and apparatus for encoding feedback signal is provided. The method includes: encoding feedback signals of three carriers to output a bit sequence; and transmitting the bit sequence on a High Speed-Dedicated Physical Control Channel (HS-DPCCH). The encoding the feedback signals of the three carriers may specifically include: mapping the feedback signals of the three carriers into a codeword, in which the codeword can be selected from a codebook, and codewords in the codebook satisfy a particular code distance relationship. The method for jointly encoding feedback signals of three carriers in a Ternary Cell (TC) mode is provided. Feedback signals are transmitted over a single code channel. Therefore, power overhead is reduced, and system performance is improved.

Abstract: An integrated circuit includes a clock generation stage that generates a clock signal having a clock frequency dependent on a reference signal. A delay stage generates a delayed clock signal by delaying the clock signal. A control stage generates a control signal indicative of a delay of the delayed clock signal relative to the clock signal. A frequency divider generates a divided signal by dividing a dividend signal having a dividend frequency dependent on the reference signal. A power supply regulator supplies power to the frequency divider at a first power level, which is dependent on the control signal.

Abstract: The application relates to a spreading signal generating method, generating device, receiving method and receiving device. The spreading signal generating method comprises: generating a first spreading signal component and a second spreading signal component, wherein the first spreading signal component and the second spreading signal component each comprise a spreading code and a binary subcarrier, the spreading code of the first spreading signal component is the same as the spreading code of the second spreading signal component, the binary subcarrier of the first spreading signal component is different from the binary subcarrier of the second spreading signal component; and modulating the first spreading signal component and the second spreading signal component with radio frequency (RF) carriers so as to generate the spreading signal, where a phase of RF carrier for modulating the first spreading signal component is different from a phase of RF carrier for modulating the second spreading signal component.

Abstract: The present invention relates to a method for adapting the feedback rate of a quantized representation of the propagation channel in a capacity-limited feedback channel. The method comprises obtaining a reference signal from an access point; deriving a rank indication, a codebook subset selection indication and a precoding matrix index based on the obtained reference signal; sending a first feedback message conveying the rank indication and the codebook subset selection indication, and sending a second feedback message conveying the precoding matrix index, to the access point; and receiving, from the access point, data precoded by a matrix derived based on the rank indication, the codebook subset selection indication and the precoding matrix index.

Abstract: Methods and systems are disclosed for frequency-domain symbol and frame synchronization for multi-carrier communication systems. Received signals are sampled and converted into frequency components associated with subcarriers within the multi-carrier communication signals. Symbol synchronization is performed in the frequency domain by performing correlation(s) between frequency components of the received signal and frequency-domain synchronization symbol(s). After symbol synchronization, frame synchronization correlation is also performed in the frequency domain between frequency components of the received signal and frequency-domain synchronization symbol(s). The disclosed embodiments are particularly useful for symbol and frame synchronization in multi-carrier received signals for power line communication (PLC) systems and/or other harsh noisy communication environments.

Abstract: System, methods and apparatus are described that facilitate transmission of data, particularly between two devices within an electronic apparatus. Information is transmitted in N-phase polarity encoded symbols. Drivers may be adapted or configured to align state transitions on two or more connectors in order to minimize a transition period between consecutive symbols. The drivers may include circuits that advance or delay certain transitions. The drivers may include pre-emphasis circuits that operate to drive the state of a connector for a portion of the transition period, even when the connector is transitioned to an undriven state.

Abstract: A method for noise rise estimation in a wireless communication system comprises measuring of received total wideband power a plurality of times and computing an estimate of a noise floor measure based on a number of the measured received total wideband powers. An interference whitening is performed based on one of GRAKE, GRAKE?and chip equalizer. A useful signal power for the first user after interference whitening is determined. A first user noise floor compensation factor is derived based on combining weights for the first user used in the interference whitening. A code power to interference ratio measure for said first user is obtained. A noise rise measure is calculated, based at least on the useful signal power for the first user after interference whitening, the first user noise floor compensation factor, the code power to interference ratio measure for the first user and the noise floor measure.