Abstract: Apparatus and associated methods relate to enabling a radar system to use different sensing mechanisms to estimate a distance from a target based on different detection zones (e.g., far-field and near-field). In an illustrative example, a curve fitting method may be applied for near-field sensing, and a Fourier transform may be used for far-field sensing. A predetermined set of rules may be applied to select when to use the near-field sensing mechanism and when to use the far-field mechanism. The frequency of a target signal within a beat signal that has less than two sinusoidal cycles may be estimated with improved accuracy. Accordingly, the distance of a target that is within a predetermined distance range (e.g., two meters range for 24 GHz ISM band limitation) may be reliably estimated.

Abstract: Apparatus and associated methods relate to enabling a radar system to use different sensing mechanisms to estimate a distance from a target based on different detection zones (e.g., far-field and near-field). In an illustrative example, a curve fitting method may be applied for near-field sensing, and a Fourier transform may be used for far-field sensing. A predetermined set of rules may be applied to select when to use the near-field sensing mechanism and when to use the far-field mechanism. The frequency of a target signal within a beat signal that has less than two sinusoidal cycles may be estimated with improved accuracy. Accordingly, the distance of a target that is within a predetermined distance range (e.g., two meters range for 24 GHz ISM band limitation) may be reliably estimated.

Abstract: Apparatus and associated methods relate to detection systems with chatter-mitigated output indication. In an illustrative example, a sensor may generate a detection signal as a function of a physical relationship of a target to the sensor. A control circuit may, for example, generate a control signal in response to the detection signal and as a function of a predetermined indication response profile defining a transition threshold for each of multiple nominal transition points. A light-emitting indicator array may, for example, generate spatially distributed indication in response to the control signal. The indication may, for example, change from a first spatial distribution to a second spatial distribution in response to the detection signal crossing a first nominal transition point by at least a corresponding transition threshold (?1i). Various embodiments may, for example, advantageously prevent the visual indication from responding to perturbations in the detection signal.

Abstract: Systems, devices, and methods for encoding a plurality of images by an encoder where the encoder determines a set of subbands associated with an input image, determines a set of wavelet coefficients associated with each subband, generates a wavelet tree comprising a set of nodes and a maximum quantization level for a set of descendants of the set of nodes of the wavelet tree. Then, determines if the maximum quantization level is less than a threshold and sets the wavelet coefficient to zero if it is not, otherwise encodes the maximum quantization level, and encodes the set of wavelet coefficients for transmission in a bit stream comprising the encoded maximum quantization level and the encoded set of wavelet coefficients.

Abstract: Systems, devices, and methods for encoding a plurality of images by an encoder where the encoder determines a set of subbands associated with an input image, determines a set of wavelet coefficients associated with each subband, generates a wavelet tree comprising a set of nodes and a maximum quantization level for a set of descendants of the set of nodes of the wavelet tree. Then, determines if the maximum quantization level is less than a threshold and sets the wavelet coefficient to zero if it is not, otherwise encodes the maximum quantization level, and encodes the set of wavelet coefficients for transmission in a bit stream comprising the encoded maximum quantization level and the encoded set of wavelet coefficients.

Abstract: Devices, methods, and systems for an orthogonal frequency division multiplexing (OFDM) receiver comprising a processor configured to execute a maximum likelihood timing estimator for OFDM symbol timing, a resampling filter for sampling clock frequency offset correcting via a loop filter, where the loop filter may be configured to receive a symbol timing loop error and provide, via a delay accumulator input signals to the resampling filter, and where the resampling filter may be configured to output a resampled signal for demodulating.