41 results about "Spectral shaping" patented technology

An apparatus (10, 110) comprising: means for transmitting, to a second apparatus (120), first information (901) indicative of a capability of the apparatus to adapt at least one of: a design of a frequency-domain spectral shaping, FDSS, filter (902) for FDSS-based orthogonal frequency division multiplexing, OFDM, transmission, or a spectral extension parameter (903) for use in FDSS-based OFDM with spectral extension transmission; means for receiving, from the second apparatus based at least in part on the transmitted first information, second information (904), wherein the second information comprises information for configuring the apparatus to operate in an operational mode (906) for generating training data for training a machine learning, ML, based FDSS filter; and means for operating in the operational mode, wherein the operation in the operational mode is based at least in part in on the second information, and wherein operating in the operational mode comprises: transmitting, using at least a first configuration of the FDSS filter design (909) or a first spectral extension parameter (910), at least a first FDSS-based OFDM transmission (908) to the second apparatus.

An apparatus (10, 100) comprising: means for transmitting, to a second apparatus (120), first information (1101) indicative of a capability of the apparatus to adapt at least one of: a design of a first frequency-domain spectral shaping, FDSS, filter (1102) for FDSS-based orthogonal frequency division multiplexing, OFDM, transmission, wherein the first FDSS filter design is matched with a design of a second FDSS filter of the second apparatus, and wherein at least one of the first or second FDSS filter designs has trainable operational parameters; or a spectral extension parameter (1103) for use in FDSS-based OFDM with spectral extension transmission; means for receiving, from the second apparatus based at least in part on the transmitted first information, second information (1104), wherein the second information comprises information for configuring the apparatus to operate in an operational mode (1106) for training the operational parameters of at least one of the first or second FDSS filter designs; and means for operating in the operational mode, wherein the operation in the operational mode is based at least in part in on the second information, and wherein operating in the operational mode comprises: transmitting, using at least a first configuration of the first FDSS filter design (1109) or a first spectral extension parameter (1110), at least a first FDSS-based OFDM transmission (1108) to the second apparatus; receiving, from the second apparatus, third information (1112), for use in training the operational parameters of the first FDSS filter design, wherein the third information is based at least in part on the first FDSS-based OFDM transmission received at the second apparatus via the second FDSS filter design; and training the operational parameters of the first FDSS filter design based at least in part on: the first FDSS-based OFDM transmission, and the third information.

An apparatus (10, 110) comprising: means for transmitting, to a second apparatus (120), first information (1301) indicative of a capability of the apparatus to adapt at least one of: a design of a frequency-domain spectral shaping, FDSS, filter (1302) for FDSS-based orthogonal frequency division multiplexing, OFDM transmission, or a spectral extension parameter (1303) for use in FDSS-based OFDM with spectral extension transmission; means for receiving, from the second apparatus based at least in part on the transmitted first information, second information (1305), wherein the second information comprises information for configuring the apparatus to operate in an operational mode (1306) in which a performance of the FDSS filter design is monitored; means for operating in the operational mode, wherein the operation in the operational mode is based at least in part in on the second information, and wherein operating in the operational mode comprises: transmitting, using at least a first configuration of the FDSS filter design (1309) or a first spectral extension parameter (13010), at least a first FDSS-based OFDM transmission (1308) to the second apparatus; receiving, from the second apparatus, third information (1312), wherein the third information is based at least in part on the at least first FDSS-based OFDM transmission received at the second apparatus; and monitoring the performance of the FDSS filter design based at least part on the third information.

A system and method are provided for spectral shaping of light from a broadband source including multiple wavelengths. The system includes a beam splitter (BS) to receive and transmit an input beam, a dispersive element to disperse the input beam into dispersed beams separated by wavelength, and optic-elements to direct the dispersed beams onto a spatial light modulator (SLM). The SLM selectively modulates the dispersed beams reflected from the SLM, and the optic elements transmit a 0th-order of the reflected light through the dispersive element, which recombines the beams to form a reflected beam directed toward the BS. The BS separates the reflected beam from the input beam and directs it to an optical output of the system. The SLM includes multiple electrostatically deflectable reflective ribbons suspended over a reflective surface of a substrate, wherein the ribbons are separated by a distance equal to a width of the ribbons.

According to one embodiment, a method performed by an apparatus of a base station can include an operation of determining a first frequency domain of a reference signal in an extended frequency domain of frequency domain spectral shaping (FDSS) based on a quality of communication of a channel between the base station and a terminal. The method can include an operation of transmitting resource allocation information about a second frequency domain used for a data signal in the extended frequency domain to the terminal, an operation of receiving an uplink signal including the reference signal and the data signal configured based on the FDSS through the extended frequency domain, an operation of performing channel estimation for the second frequency domain through the reference signal received via the first frequency domain, and an operation of acquiring the data signal according to a result of the channel estimation for the second frequency domain.

According to an aspect of the present invention an encoder for encoding an audio signal comprises an analyzer configured for deriving prediction coefficients and a residual signal from a frame of the audio signal. The encoder comprises a formant information calculator configured for calculating a speech related spectral shaping information from the prediction coefficients, a gain parameter calculator configured for calculating a gain parameter from an unvoiced residual signal and the spectral shaping information and a bitstream former configured for forming an output signal based on an information related to a voiced signal frame, the gain parameter or a quantized gain parameter and the prediction coefficients.

A computer-implemented method, when executed by data processing hardware, causes the data processing hardware to perform various operations. These operations include receiving an audio signal from a sensor array at a unified post-filter, converting the audio signal to a short time Fourier transform (STFT) domain via a conversion function, determining a speech presence probability based on the converted audio signal, and determining a noise smoothing factor based on the speech presence probability. The operations further include estimating, via the unified post-filter, a noise power spectral density based on the noise smoothing factor, estimating, via the unified post-filter, a steering vector of the desired source, and generating, via the unified post-filter, a directivity-based mask and a coherence-based mask. Operations further include generating a residual echo spectrum estimate based on the directivity-based mask and the coherence-based mask, and setting one or more spectrum shaping factors based on the residual echo spectrum estimate.

Examples of the present disclosure relate to a method, device and apparatus for communication, and a computer-readable medium. An example of the method includes: conducting, based on a channel response between a transmitter and a receiver, spectral shaping on a first sequence at the transmitter, so as to obtain an intermediate sequence, where the spectral shaping at least partially counters the channel response; remapping the intermediate sequence, so as to obtain a second sequence, where the second sequence has less signal levels than the intermediate sequence; and transmitting the second sequence to the receiver, so as to train an equalizer of the receiver. In this way, the method can accelerate training of the equalizer without sacrificing performance of the equalizer or introducing any additional hardware cost.

A computer-implemented method when executed by data processing hardware causes the data processing hardware to perform operations. The operations include receiving, from a sensor array, an audio signal at a unified post-filter, converting, via a conversion function, the audio signal into a Short-Time Fourier Transform (STFT) domain, determining, based on the converted audio signal, a speech-presence probability, and determining, based on the speech-presence probability, a noise smoothing factor. The operations also include estimating, via the unified post-filter, a noise power spectral density based on the noise smoothing factor, estimating, via the unified post-filter, a steering vector of a desired source, and generating, via the unified post-filter, a directionality-based mask and a coherence-based mask. The operations further include generating, based on the directionality-based mask and the coherence-based mask, a residual echo spectrum estimation and setting one or more spectral shaping factors based on the residual echo spectrum estimation.

The present document relates an audio encoding and decoding system (referred to as an audio codec system). In some embodiments, a method of audio signal encoding comprises: receiving an input audio signal; transforming a sequence of samples of the input audio signal into a block of transform coefficients, the transform coefficients indicative of the spectral energy of the block; estimating a spectral envelope of the block from the transform coefficients; adjusting the transform coefficients using the spectral envelope and a spectral shaper, the spectral shaper including one or more parameters indicative of a fundamental frequency of a multi-sinusoidal signal model, where the fundamental frequency corresponds to a time domain delay; and entropy coding the adjusted transform coefficients.

A resource configuration method and device. The method comprises: a terminal device receives configuration information from a network device, wherein the configuration information is used for configuring a transmission bandwidth of a waveform for the terminal device, so that the terminal device can transmit data with the network device on the basis of the transmission bandwidth. The transmission bandwidth is determined on the basis of a sequence spreading factor, the sequence spreading factor is a preset value, and the waveform generation comprises performing, on the basis of the sequence spreading factor, sequence spreading and frequency-domain spectral shaping (FDSS) on a symbol sequence carried by the waveform. A transmission bandwidth is allocated to a terminal device by means of a sequence spreading factor, so as to ensure the communication capacity or increase the communication capacity on the basis of a given sequence spreading factor (i.e., on the basis of ensuring the OBO gain and PAPR gain).

Embodiments are disclosed for spatial noise filling in multi-channel codecs. In an embodiment, a method of regenerating background noise ambience in a multi-channel codec by generating spatial hole filling noise comprises: computing noise estimates based on a primary downmix channel generated from an input audio signal representing a spatial audio scene with background noise ambience; computing spectral shaping filter coefficients based on the noise estimates; spectrally shaping the multi-channel noise signal using the spectral shaping filter coefficients and a noise distribution, the spectral shaping resulting in a diffused, multi-channel noise signal with uncorrelated channels; spatially shaping the diffused, uncorrelated multi-channel noise signal with uncorrelated channels based on a noise ambience of the spatial audio scene; and adding the spatially and spectrally shaped multi-channel noise to a multi-channel codec output to synthesize the background noise ambience of the spatial audio scene.

A communication method, comprising: a first communication device determining first indication information used for indicating information of a first filter, wherein the first filter is used for spectral shaping; and the first communication device sending the first indication information to a second communication device, such that the second communication device can determine the first filter on the basis of the first indication information. Therefore, during channel estimation, a second communication device actually takes the factors of signals and filters into consideration, instead of identifying both the signals and the filters as equivalent channels, such that the channel estimation quality during channel estimation can be improved, and the sensing precision is improved.

The application provides a wavelength-selective infrared emitter device controlled by ultrafast laser and voltage, which comprises a first phase change material layer, a dielectric layer, a second phase change material layer, a metal reflection layer, a silicon substrate and a conductive layer from top to bottom; by means of layered superposition design of nonvolatile phase change material and volatile phase change material, surface micro-nano structure control and optical resonant cavity control are spatially separated, so that structure reconstruction and cavity length conversion bear different spectral control tasks respectively, thereby breaking through the problem that the control freedom degree of single phase change material is limited; that is to say, the application adopts ultrafast laser to perform local phase change control on the first phase change material layer, so as to realize writing or erasing of a surface periodic grating structure, and by means of applying voltage, the second phase change material layer is subjected to phase transition, so as to adjust the equivalent optical cavity length of the Fabry-Perot cavity, and finally the spectral shaping ability and control flexibility are improved, and wavelength-selective control can be realized.

It is described a transmitter device (100) and a method for transmitting an analog signal (251, 261) via an electric cable (192). The transmitter device (100) comprises (a) a signal generation circuit (210) for generating a digital transmit signal (211) comprising a sequence of transmit symbols; (b) a filter circuit (230) for spectrally shaping the generated digital transmit signal (211, 221) and for outputting a filtered digital transmit signal (231); (c) a switching unit (240) comprising (c1) a first input terminal (242) for receiving the filtered digital transmit signal (231), (c2) a second input terminal (244) for receiving another digital transmit signal (297), (c3) an output terminal (246) for outputting a digital transmit output signal (241), wherein the digital transmit output signal (241) is based on, depending on a switching state of the switching unit (240), the filtered digital transmit signal (231) or the another digital transmit signal (297), and (c4) a control terminal (248) for receiving a control signal (285) from a control circuit (280), the control signal (285) being indicative for the switching state. The transmitter device (100) further comprises the control circuit (280); and a digital to analog converter (250) for receiving the digital transmit output signal (241) and for converting the received digital transmit output signal (241) to the analog signal (251, 261).

Methods, systems, and devices for wireless communications are described. The techniques described herein provide for formulating a single-carrier waveform into an Orthogonal Frequency Division Multiple Access (OFDMA) framework. To fit a Cyclic Prefix OFDM (CP-OFDM) grid, a frequency-domain Fast Fourier Transform (FFT) may be applied to the single-carrier waveform, bandwidth expansion and spectral shaping may be applied to the output of the FFT, and inverse FFT (IFFT) processing may be applied to the output of the bandwidth expansion and spectral shaping. The output of the IFFT may then be represented in an OFDM-compatible manner.

An apparatus (10, 110) comprising: means for transmitting, to a second apparatus (120), first information (701) indicative of a capability of the apparatus to adapt at least one of: a design of a frequency-domain spectral shaping, FDSS, filter (702) for FDSS-based orthogonal frequency division multiplexing, OFDM, transmission, or a spectral extension parameter (703) for use in FDSS-based OFDM with spectral extension transmission; means for receiving, from the second apparatus based at least in part on the transmitted first information, second information (704), wherein the second information comprises information for configuring the apparatus to operate in an operational mode (706) in which training data for training a machine learning, ML, based FDSS filter is generated; means for operating in the operational mode, wherein the operation in the operational mode is based at least in part in on the second information, and wherein operating in the operational mode comprises: transmitting, using at least a first configuration of the FDSS filter design (709) or a first spectral extension parameter (710), at least a first FDSS-based OFDM transmission (708) to the second apparatus; receiving, from the second apparatus, third information (712), wherein the third information is based at least in part on the at least first FDSS- based OFDM transmission received at the second apparatus; and generating training data based at least in part on: the at least a first configuration of the FDSS filter design or the first spectral extension parameter; and the third information.

A computer-implemented procedure, when executed by data processing hardware, causes the data processing hardware to perform operations. These operations include receiving an audio signal from a sensor array at a unified post-filter, converting the audio signal into a short-time Fourier transform (STFT) domain using a conversion function, determining a speech presence probability based on the converted audio signal, and determining a noise smoothing factor based on the speech presence probability. The operations also include estimating a spectral noise power density based on the noise smoothing factor across the unified post-filter, estimating a control vector of a desired source across the unified post-filter, and generating a direction-based mask and a coherence-based mask across the unified post-filter.The operations also include generating a residual echo spectrum estimate based on the direction-based mask and the coherence-based mask, and setting one or more spectral shaping factors based on the residual echo spectrum estimate.

An erbium fiber laser produces a beam of ultrashort laser pulses having a center wavelength greater than 780 nanometers, an average power greater than 0.5 watt, and a spectral bandwidth compressible to a pulse duration of less than 200 femtoseconds. The laser includes a fiber preamplifier that is energized by a counter-propagating pump beam, has relatively low population inversion in a relatively long optical gain fiber, and provides a spectrally-shaped beam for further amplification. Wavelength dependent gain and absorption within the optical gain fiber enhances longer wavelengths relative to shorter wavelengths in the spectrally-shaped beam. The spectral shaping is sufficient to overcome gain narrowing and gain shifting in a subsequent high-gain fiber amplifier.

A Reconfigurable Optical Add / Drop Multiplexer (ROADM) node architecture is disclosed that supports wide-spectrum channel operation. The ROADM includes a plurality of degrees, each degree comprising a Wavelength Selective Switch (WSS) configured to define variable-width spectral slices and perform spectral shaping or equalization. A central fiber / space switch interconnects slice ports of the WSSs and provides programmable partial-mesh connectivity. Local add / drop is achieved through direct connection of optical modems, including Full-Spectrum-Transponders (FSTs) that integrate multiple modems and internal multiplexing to provide wide-spectrum outputs spanning all or part of an amplified band. The fiber / space switch treats the FST as an add / drop degree, simplifying operations by eliminating intervening multiplexers and reducing external fiber connections. This architecture enables efficient end-to-end transport of wide spectral slices, reduces insertion loss, and allows scalable, cost-effective deployment of high-capacity ROADM nodes using existing optical components.

The present disclosure provides communication apparatuses and communication methods for integrating frequency domain spectral shaping (FDSS) with spectrum extension and tone reservation. The communication apparatuses include a communication apparatus comprising: circuitry, which in operation: determines one or more frequency components for a spectrum-10 extension (SE) part and one or more other frequency components for a non-SE part of a signal based on control information relating to the SE part and the non-SE part; generates a compensating signal based on the one or more frequency components of the SE part; and generates a reduced peak signal based on the compensating signal; and a transmitter, which in operation, transmits the 15 reduced peak signal.

An apparatus (UE) 110: transmits, to a second apparatus (gNB) 120, first information 1501 indicating capability of the apparatus to adapt at least one of: a first frequency-domain spectral shaping, F

The application provides a 5G FR1 forming filter system and a design method, relates to the technical field of forming filters, and the system comprises a BBU end intelligent prediction module, an RRU end configuration management and dynamic coefficient switching module and an RRU end unified structure channel filter module; the BBU intelligent prediction module predicts an optimal FIR filter coefficient set in real time through a light DNN model and delivers the same to the RRU end; the RRU end configuration management and dynamic coefficient switching module realizes flexible switching of the coefficients based on a pre-stored initial filter coefficient set of the FR1 full frequency band and in combination with a dynamic configuration instruction; and the RRU end unified structure channel filter module performs spectral shaping filter processing on a downlink CP-OFDM signal after adjusting the target coefficient set into a FIR structure. Through the AI-driven dynamic optimization mechanism and the unified hardware architecture, the application solves the problems of dispersed filter structures and insufficient static configuration flexibility in the prior art.

A first apparatus (such as a UE; 110) transmits (501) to a second apparatus (such as a gNB; 120) an indication of its capability to adapt a design of a frequency-domain spectral shaping (FDSS) filter

The invention relates to the technical field of seismic data processing, and discloses a signal-to-noise ratio optimization method and system for post-stack two-dimensional seismic data. The method comprises the following steps: performing well-to-seismic joint calibration on original two-dimensional seismic data to determine main target stratum distribution, and performing spectral analysis to identify a noise frequency band; based on the main target layer distribution, performing segmented Q compensation processing on the original data to obtain a seismic data volume after Q compensation processing; on the basis, spectrum shaping processing is carried out according to the identified noise frequency band so as to suppress the noise and preliminarily improve the signal-to-noise ratio; and finally, diffusion filtering processing is carried out on the data volume after spectrum shaping processing, and a final two-dimensional seismic data volume with an improved signal-to-noise ratio is obtained. According to the method, through series application of Q compensation, spectrum shaping and diffusion filtering, the continuity of the event is effectively improved, the definition of fracture imaging is improved, and a more reliable data basis is provided for structural interpretation and trap evaluation.

A resource allocation method and apparatus, comprising: a terminal device receiving configuration information from a network device, the configuration information being used for configuring a transmission bandwidth of a waveform for the terminal device, so that the terminal device can transmit data with the network device based on the transmission bandwidth. Wherein the transmission bandwidth is determined based on a sequence expansion factor, the sequence expansion factor is a preset value, and the generation of the waveform comprises the steps of performing sequence expansion and frequency domain spectrum shaping FDSS processing on a symbol sequence borne by the waveform based on the sequence expansion factor. The transmission bandwidth is allocated for the terminal device through the sequence expansion factor, and the communication capacity is guaranteed or increased on the basis that the sequence expansion factor is given (namely, on the basis of guaranteeing OBO gain and PAPR gain).

An apparatus (10, 110) comprising: means for transmitting, to a second apparatus (120), first information (1501) indicative of a capability of the apparatus to adapt at least one of: a design of a frequency-domain spectral shaping, FDSS, filter (1502) for FDSS-based orthogonal frequency division multiplexing, OFDM transmission, or a spectral extension parameter (1503) for use in FDSS-based OFDM with spectral extension transmission; means for receiving, from the second apparatus based at least in part on the transmitted first information, second information (1505), wherein the second information comprises information for configuring the apparatus to operate in an operational mode (1506) for monitoring a performance of an FDSS filter design of the second apparatus; means for operating in the operational mode, wherein the operation in the operational mode is based at least in part in on the second information, and wherein operating in the operational mode comprises: transmitting, using at least a first configuration of the FDSS filter design (1509) or a first spectral extension parameter (1510), at least a first FDSS-based OFDM transmission (1508) to the second apparatus.

A first apparatus (such as a UE; 110) transmits (1901) to a second apparatus (such as a gNB; 120) an indication of its capability to adapt a frequency-domain spectral shaping (FDSS) filter and / or to a

The application provides a metrology tool, and a method, for determining parameters of interest of a structure on an object. This metrology tool comprises: an illumination branch configured for providing an illumination beam; a spectral shaping device for spectrally shaping the illumination beam providing a spectrum comprising at least two disjunct wavelength bands; a controller and a 5 detection branch configured for detecting signals relating to a diffracted beam, the beam comprising diffracted sub-beams, wherein the signals enable determining parameters of interest. The illumination branch is further configured for illuminating the structure on the object which results in the diffracted beam. Each of the diffracted sub-beams is associated with one of the at least two disjunct wavelength bands. The controller is configured for selecting the spectrum allowing distinguishably acquiring the 0 signals from respective diffracted sub-beams and the controller is configured for controllably setting the spectral shaping device to provide the spectrum.

An apparatus (UE) 110: transmits, to a second apparatus (gNB) 120, first information 1101 indicating capability of the apparatus to adapt at least one of: a first frequency-domain spectral shaping,