Abstract: A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a dispersion determined for each carrier. The receiver initially allocates a minimum number of processing delays sufficient for light dispersion to each carrier. For the dispersive carriers, the receiver allocates one or more additional processing delays. In one embodiment, the additional processing delays are allocated to the dispersive carriers based on SIR.

Abstract: Apparatus, methods, and programs products are disclosed that perform the following techniques: in a receiver comprising first and second stages, each stage at least decoding information corresponding to a user equipment, wherein the second stage performs decoding only if the first stage completes decoding with a fail, predicting whether decoding performed by the second stage for the user equipment will complete with a pass or fail; and prior to completion of the second stage, sending an indication of the predicted pass or fail to the user equipment.

Abstract: In a transceiver, a clock generator generates a second clock synchronized with a first clock. The second clock has a period corresponding to a duration of one bit of a digital signal. When first transmission data is supplied to the transceiver with being asynchronous to the second clock, a sampling timing generator detects start data of the first transmission data as a start timing, and generates sampling timings based on the first clock in response to the start timing. The sampling timings have intervals each of which is defined to correspond to the period of the second clock. The first sampling timing is spaced from the start timing. A sampling module samples, at each of the sampling timings, the first transmission data, thus generating second transmission data synchronized with the second clock.

Abstract: Embodiments of a digital up-conversion system for a concurrent multi-band signal and methods of operation thereof are disclosed. In one embodiment, a digital up-conversion system includes multiple digital up-converter chains, each for a different frequency band of the concurrent multi-band signal, and a digital combiner that combines up-converted signals output by the digital up-converter chains to provide a combined digital signal. The combined digital signal is processed by one or more additional processing components including a digital-to-analog converter (DAC) to provide the concurrent multi-band signal.

Abstract: An identification method for a data Sk is disclosed which includes; a) construction of a chronological sequence {T1; . . . ; Ti; . . . ; TN} of times of arrival Ti of pulses or a block of successive pulses, b) calculation of a value of similarity between this sequence {T1; . . . ; Ti; . . . ; TN} and a predetermined chronological sequence {TREFk1; . . . ; TREFkj; . . . ; TREFkM} of times of arrival coding the data Sk for several time offsets Ol between the sequence {T1; . . . ; Ti; . . . ; TN} and the sequence {TREFk1; . . . ; TREFkj; . . . ; TREFkM}, c) identification of the data Sk in the series {T1; . . . ; Ti; . . . ; TN} if the calculated value of similarity for one of the time offsets Ol exceeds a predetermined threshold.

Abstract: A communication system includes master host unit, hybrid expansion unit, and remote antenna unit. Master host unit communicates analog signals with service provider interfaces. Master host unit and hybrid expansion unit communicate N-bit words of digitized spectrum over communication link. Hybrid expansion unit converts between N-bit words and analog spectrum. Hybrid expansion unit and remote antenna unit communicate analog spectrum over analog communication medium. Remote antenna unit transmits and receives wireless signals over air interfaces. Master host unit includes master clock distribution unit that generates digital master reference clock signal. Master host unit communicates digital master reference clock signal over communication link. Hybrid expansion unit receives digital master reference clock signal from master host unit over communication link and generates analog reference clock signal based on digital master reference clock signal.

Abstract: A method of decoding a digitally encoded signal having plural channels includes sampling a transient portion of a master filter mask, storing matched filter coefficients obtained from the sampling, receiving the digitally encoded signal, channelizing the digitally encoded signal into the plural channels, and generating a channel matched filter mask for each one of the plural channels using a subset of the stored coefficients. The method also includes filtering each one of the plural channels, in the frequency domain, based on the channel matched filter mask generated for each of the plural channels. Also disclosed are related methods using a burst reconstruction buffer, per channel distortion equalization, channel estimation and activity monitoring, and noise floor estimation, as well as corresponding apparatuses.

Abstract: A transceiver in-phase and quadrature (IQ) calibration method is provided. When calibrating the transceiver, an adjusting unit is connected to an output terminal of a transmitter to receive a first radio-frequency (RF) signal. The adjusting unit adjusts a phase delay of the first RF signal to generate a second RF signal to be inputted to an input terminal of a receiver. Through adjusting the phase delay of the first RF signal, both the transmitter and the receiver can be calibrated at the same time.

Abstract: Methods and apparatuses are provided for providing compressed feedback channel state information for beamforming. A beam transmitted by a transmission source is received at a receiving device. The receiving device computes a channel state matrix H of the transmission channel based on the received beam. Using the channel state matrix H, the receiving device performs a singular value decomposition procedure that produces a steering matrix V. The singular value decomposition procedure generates a set of angles (?V, ?) from which the steering matrix V can be computed. The receiving device transmits the set of angles (?V, ?) to the transmitting device. From the set of angles (?V, ?), the transmitting device can compute the steering matrix V.

Abstract: A network receiver and the adjusting method thereof, the network receiver includes a first delay unit, a second delay unit, a first processing unit and an adjusting circuit. The first delay unit is for delaying a first signal received from a first transmission line to generate a delayed first signal. The second delay unit is for delaying a second signal received from a second transmission line to generate a delayed second signal. The first processing unit is for processing a difference between the delayed first signal and the delayed second signal to generate first data. The adjusting circuit adjusts the first and second delay units to have a plurality of delay amount combinations, the first processing unit generates a plurality of first data respectively corresponding to the delay amount combinations, and the adjusting circuit adjusts delay amount of the first and second delay units according to the first data.

Abstract: A method and a device which are for signal processing and are applied to a microwave communication system are disclosed. The method includes: performing equalization processing on each input signal by using an equalizer so as to obtain an equalized signal corresponding to the each input signal; performing phase estimation on phase noise in the equalized signal to obtain an estimated phase of the phase noise; performing phase rotation on the equalized signal to offset the estimated phase of the phase noise, so as to obtain a phase rotation signal; suppressing residual phase noise in the phase rotation signal by using a phase-locked loop so as to output an error signal and a received signal; and performing an iterative update on a filter coefficient of the equalizer by using the error signal.

Abstract: The diversity reception device includes an antenna switching unit configured to select and switch to a determined chain number of antennas out of a plurality of antennas; and an antenna interchange control unit configured to control the antenna switching unit to interchange an antenna. The antenna interchange control unit compares a carrier-to-noise ratio measured by a demodulation circuit of a demodulation unit of each chain, controls the antenna switching unit to sequentially switch connection with an antenna of a chain having a lowest carrier-to-noise ratio to connection with antennas connectable to the chain, and interchanges the antenna of the chain having a lowest carrier-to-noise ratio with an antenna estimated to have a highest carrier-to-noise ratio on the basis of the input level measured by the level detection unit or an antenna having a highest input level measured by the level detection unit among the connection-switched antennas.

Abstract: A method is provided for estimating at least one offset of a communication in a multicarrier communication system. The method comprises receiving a plurality of subcarriers wherein the plurality of subcarriers contain the subcarrier that is subject to the distortion; and generating a plurality of first channel estimates for a respective plurality of received subcarriers that are not subject to the distortion. The method further comprises processing a number of the plurality of first channel estimates for the respective plurality of received subcarriers that are not subject to the distortion to generate a second channel estimate for the subcarrier that is subject to the distortion; and estimating an offset associated with the subcarrier that is subject to the distortion.

Abstract: Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified.

Abstract: In a variable length encoding for video data, the compression rate of video image encoding is increased by improving the level encoding method. A CAVLC encoding unit acquires coefficients obtained by orthogonally transforming and quantizing video image data in each block unit, determines an encoding mode of variable length encoding among those in a table_A and a table_B, or a mixture thereof by a level encoding mode controller and outputs the determination result to a level_prefix unit. In the table_B, a fixed_length bit string is allocated to a level_prefix which is at least a prescribed value. The level_prefix unit performs a level_prefix encoding in the determined encoding mode to output the result to an output control unit.

Abstract: A method for controlling a receiver circuit and circuit with a receiver circuit and with a control circuit is provided, whereby a received signal is demodulated and filtered. An amplitude value of the demodulated and filtered signal is compared with thresholds of a window comparator. A zero crossing of the demodulated and filtered signal is compared with time thresholds of a time window by a comparison unit. A first output value of the window comparator and a second output value of the comparison unit are logically combined, and wherein, via the logical combination, the receiver circuit is turned off if, within a period of time, the amplitude value is determined to be outside a window formed by the thresholds of the window comparator, or a zero crossing is determined to be outside the time window.

Abstract: The present invention provides a method and system for transmitting Multiple Input Multiple Output (MIMO) beam forming data. The method comprises: performing MIMO coding on data streams to obtain the coded data streams; obtaining weight values W=(Wi,j)Tx×S for beam forming of an antenna array of Tx×S of a transmitting end based on channel information from the antenna array of the transmitting end to antennas of a receiving end, where Tx is the number of transmitting antennas of the transmitting end, S is the number of the MIMO-coded data streams, and S?Tx; and weighting the coded data streams with the weight values W=(Wi,j)Tx×S for beam forming, and transmitting the weighted data streams by corresponding antennas, where the data transmitted by antenna i is superposed data ? j = 1 S ? W i , j ? x j , i = 1 , … ? , Tx , j = 1 , … ? , S , and xj is jth coded data stream.

Abstract: A signal repeater (200) includes a signal processing part (202) and a signal repeating part (204). The signal processing part includes a converter (300) configured to receive an input signal and to convert the input signal into quadrature signals, and a processor (302, 304, 306) configured to process the quadrature signals to determine one or more characteristics of the input signal, and to compare the one or more characteristics of the input signal and a plurality of predetermined characteristics to generate a comparison result. The signal repeating part (204) is configured to selectively repeat the input signal as a repeated signal in accordance with the comparison result.

Abstract: In MIMO multiplex transmission accompanied by precoding, a reduction of peak power is realized while minimizing deterioration of transmission quality. The present MIMO multiplex transmission method includes a step of generating transmission data corresponding to a plurality of streams to be transmitted simultaneously, a step of performing precoding so that the transmission data is received by a receiver as data orthogonal to each other, a step of applying amplitude clipping to the precoded transmission data in stream units to suppress peaks of the entire transmission power, and a step of suppressing allocation of interference power caused by the amplitude clipping to streams in a good channel state.

Abstract: A data receiving device capable of reducing power consumption. A data receiving device according to the present invention has a receiving circuit and a power reduction circuit. The receiving circuit includes a receiver for receiving differential signals, a decode circuit, and a control circuit. The power reduction circuit puts the receiver into an on state in accordance with timing of a data reception start by the receiving circuit, and puts the receiver into an off state in accordance with timing of a data reception end by the receiving circuit. Further, the control circuit puts the power reduction circuit into an off state in accordance with the timing of the data reception start by the receiving circuit, and puts the power reduction circuit into an on state in accordance with the timing of the data reception end by the receiving circuit.