Abstract: A method of and apparatus removing of a plurality of relatively narrow banded signals in a relatively wide banded input signal. The method involves and the apparatus provides for compressively sensing one relatively narrow banded signal in the relatively wide banded input signal and removing one relatively narrow banded signal from the relatively wide banded input signal before detecting and removing another relatively narrow banded signal in the relatively wide banded input signal, the step of and apparatus for compressing sensing occurring with respect to both (i) the input signal with the previously detected narrow banded signals removed therefrom and (ii) a frequency shifted version of (i).

Abstract: A method of and apparatus removing of a plurality of relatively narrow banded signals in a relatively wide banded input signal. The method involves and the apparatus provides for compressively sensing one relatively narrow banded signal in the relatively wide banded input signal and removing one relatively narrow banded signal from the relatively wide banded input signal before detecting and removing another relatively narrow banded signal in the relatively wide banded input signal, the step of and apparatus for compressing sensing occurring with respect to both (i) the input signal with the previously detected narrow banded signals removed therefrom and (ii) a frequency shifted version of (i).

Abstract: A method of and apparatus removing of a plurality of relatively narrow banded signals in a relatively wide banded input signal. The method involves and the apparatus provides for compressively sensing one relatively narrow banded signal in the relatively wide banded input signal and removing one relatively narrow banded signal from the relatively wide banded input signal before detecting and removing another relatively narrow banded signal in the relatively wide banded input signal, the step of and apparatus for compressing sensing occurring with respect to both (i) the input signal with the previously detected narrow banded signals removed therefrom and (ii) a frequency shifted version of (i).

Abstract: Embodiments of the present invention provide a signal processing method and a base station. By using respective sparse characteristics of a user signal and an interference signal, the user signal and the interference signal are iteratively recovered, that is, the interference signal is first fastened, and the user signal is recovered; and then the user signal is fastened, and the interference signal is recovered. In this way, an iteration cycle is repeated until the recovered user signal and the recovered interference signal meet a preset condition, thereby effectively improving interference cancellation performance, achieving relatively good interference suppression.

Abstract: The present invention provides a channel measurement method, a channel measurement apparatus, user equipment. A wireless communications system includes a channel measurement apparatus and at least two user equipments. The method includes: sending, by the channel measurement apparatus, an antenna domain training sequence to the at least two user equipments; receiving, by the channel measurement apparatus, channel response measurement sequences sent by the at least two user equipments, where the channel response measurement sequences are sequences that are obtained after the antenna domain training sequence passes through channels and that are received by the at least two user equipments; and performing, by the channel measurement apparatus, joint processing on the received channel response measurement sequences of the at least two user equipments to obtain downlink channel state information CSIT.

Abstract: The present invention relates to a compressive sensing-based signal processing method and apparatus. The method includes: determining distribution, of signal components of an input signal on which frequency mixing has been performed, in a baseband spectrum according to spectral distribution of the input signal; dividing the baseband spectrum according to different signal aliasing patterns formed by the distribution of the signal components, to form multiple frequency bands; determining lowest sampling frequency of the input signal according to the signal aliasing patterns in the frequency bands, and performing sampling on the input signal at sampling frequency greater than the lowest sampling frequency, to obtain a sampled signal; and separately restoring a corresponding signal component in each frequency band of the multiple frequency bands according to the sampled signal, and splicing the signal components restored in the frequency bands, to complete restoration of the input signal.

Abstract: The present invention discloses a multiband signal processing apparatus and method. The apparatus includes a multi-tone local oscillator signal generating unit and a multi-tone local oscillator signal transmission channel, where the multi-tone local oscillator signal transmission channel includes a band-pass filter and a frequency mixer. The multi-tone local oscillator signal generating unit is configured to generate a multi-tone local oscillator signal according to frequency response information of at least one device included in the multi-tone local oscillator signal transmission channel; the band-pass filter is configured to filter the received multi-tone local oscillator signal to obtain a filtered multi-tone local oscillator signal; and the frequency mixer is configured to perform frequency mixing on the multiband signal and the received multi-tone local oscillator signal.

Abstract: The present invention discloses a multiband signal processing apparatus and method. The apparatus includes a multi-tone local oscillator signal generating unit and a multi-tone local oscillator signal transmission channel, where the multi-tone local oscillator signal transmission channel includes a band-pass filter and a frequency mixer. The multi-tone local oscillator signal generating unit is configured to generate a multi-tone local oscillator signal according to frequency response information of at least one device included in the multi-tone local oscillator signal transmission channel; the band-pass filter is configured to filter the received multi-tone local oscillator signal to obtain a filtered multi-tone local oscillator signal; and the frequency mixer is configured to perform frequency mixing on the multiband signal and the received multi-tone local oscillator signal.

Abstract: The present invention provides a channel measurement method, a channel measurement apparatus, user equipment. A wireless communications system includes a channel measurement apparatus and at least two user equipments. The method includes: sending, by the channel measurement apparatus, an antenna domain training sequence to the at least two user equipments; receiving, by the channel measurement apparatus, channel response measurement sequences sent by the at least two user equipments, where the channel response measurement sequences are sequences that are obtained after the antenna domain training sequence passes through channels and that are received by the at least two user equipments; and performing, by the channel measurement apparatus, joint processing on the received channel response measurement sequences of the at least two user equipments to obtain downlink channel state information CSIT.

Abstract: The present invention relates to a compressive sensing-based signal processing method and apparatus. The method includes: determining distribution, of signal components of an input signal on which frequency mixing has been performed, in a baseband spectrum according to spectral distribution of the input signal; dividing the baseband spectrum according to different signal aliasing patterns formed by the distribution of the signal components, to form multiple frequency bands; determining lowest sampling frequency of the input signal according to the signal aliasing patterns in the frequency bands, and performing sampling on the input signal at sampling frequency greater than the lowest sampling frequency, to obtain a sampled signal; and separately restoring a corresponding signal component in each frequency band of the multiple frequency bands according to the sampled signal, and splicing the signal components restored in the frequency bands, to complete restoration of the input signal.

Abstract: Embodiments of the present invention provide a signal processing method and a base station. By using respective sparse characteristics of a user signal and an interference signal, the user signal and the interference signal are iteratively recovered, that is, the interference signal is first fastened, and the user signal is recovered; and then the user signal is fastened, and the interference signal is recovered. In this way, an iteration cycle is repeated until the recovered user signal and the recovered interference signal meet a preset condition, thereby effectively improving interference cancellation performance, achieving relatively good interference suppression.

Abstract: Embodiments of the present invention provide a device and a method for converting analog information, which achieve sufficient information spread of a sparse signal with a filter of relative low order and reduce hardware complexity, and which is not only applicable to processing of time domain sparse signals, but also applicable to processing of frequency domain signals. The method includes: multiplying an analog sparse signal with a random sequence to obtain a randomized analog sparse signal; performing IIR filtering to the randomized analog sparse signal to obtain an information spread random analog sparse signal; reducing a frequency of the information spread random sparse signal to obtain a frequency-reduced random analog sparse signal; and sampling the frequency-reduced random analog sparse signal with a low sampling rate to obtain a compressed sampled signal.

Abstract: An adaptive scheme for interference removal in compressive signal detection and reconstruction in real time. When an input signal is composed of a mixture of multiple signals, the signals are detected sequentially according to the signal strength in an iterative way. After one signal is detected, a set of resources is allocated to isolate and process that signal. The isolated signal is removed from the input as interference. The detector proceeds to process the cleaner input and detect another signal, which is also removed. The process continues until all signals are removed. The individual signals which are removed may be subjected to signal processing for analysis purposes.

Abstract: A method of and apparatus removing of a plurality of relatively narrow banded signals in a relatively wide banded input signal. The method involves and the apparatus provides for compressively sensing one relatively narrow banded signal in the relatively wide banded input signal and removing one relatively narrow banded signal from the relatively wide banded input signal before detecting and removing another relatively narrow banded signal in the relatively wide banded input signal, the step of and apparatus for compressing sensing occurring with respect to both (i) the input signal with the previously detected narrow banded signals removed therefrom and (ii) a frequency shifted version of (i).

Abstract: A controller for a memory device has a power control section to control power to a memory element in an operation mode and in a retention mode. A monitoring section receives and monitors error information and a storage section stores a retention parameter. In the operation mode, the power control section causes an operation voltage to be applied to the memory element, and in the retention mode, the power control section causes a time-varying voltage to be applied to the memory. The power control section also causes the voltage across the memory element to change in the retention mode between a first retention voltage and a second retention voltage based on the retention parameter.

Abstract: Described is a method for accurately reconstructing analog signals. The present invention considers a general parameter estimation problem, extends the utility of compressive sensing to real scenarios, and is able to accurately estimate center frequencies and amplitudes. Specifically, an unknown continuous analog signal comprising a set of arbitrary frequencies and amplitudes is received. A set of non-uniform samples of the unknown continuous analog signal is then obtained at multiple times. Finally, an iterative reconstruction process is utilized to determine a set of frequencies and a set of amplitudes that best fit the set of non-uniform samples in a global minimum problem in order to accurately reconstruct the continuous analog signal.

Abstract: A controller for a memory device has a power control section to control power to a memory element in an operation mode and in a retention mode. A monitoring section receives and monitors error information and a storage section stores a retention parameter. In the operation mode, the power control section causes an operation voltage to be applied to the memory element, and in the retention mode, the power control section causes a time-varying voltage to be applied to the memory. The power control section also causes the voltage across the memory element to change in the retention mode between a first retention voltage and a second retention voltage based on the retention parameter.

Abstract: A time encoding machine (TEM) for time encoding an input signal includes a hysteresis quantizer having a time encoded sequence output and a random sequence generator having a random signal output coupled to the hysteresis quantizer for randomizing switching times of the hysteresis quantizer.

Abstract: A method is provided that determines a delay and phase of an ultra-wide band signal in a communication system using a single correlator. A pulse search is executed that includes correlating a signal template with a UWB signal and sampling a preamble of the UWB signal at various time positions until a pulse in the signal template matches a pulse in the preamble. A chip boundary at which the pulse in the preamble is detected is identified using the signal template. A code search is executed for determining the correct phase of the received signal. The code search utilizes a plurality of phases having a same time-hopping sequence as the received signal. Each pulse of the phases is positioned at the determined chip boundary within each respective chip pulse position. Chips pulse positions of the phases are compared with the chip pulse positions of the UWB signal for determining a phase match.

Abstract: A method is provided that determines a delay and phase of an ultra-wide band signal in a communication system using a single correlator. A pulse search is executed that includes correlating a signal template with a UWB signal and sampling a preamble of the UWB signal at various time positions until a pulse in the signal template matches a pulse in the preamble. A chip boundary at which the pulse in the preamble is detected is identified using the signal template. A code search is executed for determining the correct phase of the received signal. The code search utilizes a plurality of phases having a same time-hopping sequence as the received signal. Each pulse of the phases is positioned at the determined chip boundary within each respective chip pulse position. Chips pulse positions of the phases are compared with the chip pulse positions of the UWB signal for determining a phase match.