Patent application number | Description | Published |
20100259428 | METHOD AND APPARATUS FOR RECONSTRUCTING DIGITIZED DISTORTED SIGNALS - A method of reproducing an original analog signal modified by a distortion and sampled. The distortion may be linear or nonlinear, and the samples may be either ideal or non-ideal. The method determines a stationary point of a cost function based on an error vector. The method iteratively computes approximated analog signals until the approximated analog signals converge to the original analog signal. The method may utilize Fr?chet derivatives and Moore-Penrose pseudo inverse transformations in order to iteratively compute the original analog signal. An apparatus performing said method is also disclosed. | 10-14-2010 |
20110225218 | LOW-RATE SAMPLING OF PULSE STREAMS - A method includes accepting an analog input signal that includes a sequence of pulses. The analog input signal is filtered so as to produce a filter output, using a filter whose time-domain response is confined to a finite time period and whose frequency-domain response is non-zero at a finite set of integer multiples of a frequency shift Δω, and is zero at all other integer multiples of Δω. The filter output is sampled so as to produce digital samples. Respective amplitudes and time positions of the pulses in the sequence are calculated based on the digital samples. | 09-15-2011 |
20110294453 | EFFICIENT SAMPLING AND RECONSTRUCTION OF SPARSE MULTI-BAND SIGNALS - A method for signal processing includes distributing an analog input signal to a plurality of processing channels. In each processing channel, the input signal is mixed with a respective periodic waveform including multiple spectral lines, so as to produce a respective baseband signal in which multiple spectral slices of the input signal are superimposed on one another. The baseband signal produced in each of the processing channels is digitized, to produce a set of digital sample sequences that represent the input signal. | 12-01-2011 |
20120188368 | METHOD AND SYSTEM FOR SUPER-RESOLUTION SIGNAL RECONSTRUCTION - A method and system are presented for reconstructing an input field where the latter is sensed by a measurement system. The method comprises: providing measured data corresponding to output field of said measurement system; providing data about sparsity of the input field, and data about effective response function of the measurement system; and processing the measured data based on said known data, the processing comprising: determining a sparse vector as a function of said measured data, said data about the sparsity of the input field, and said data about the effective response function; and using the sparse vector for reconstructing the input information. The invention allows for sub-wavelength resolution in imaging applications, and allows for detection of very short pulses by slow detectors in some other applications. | 07-26-2012 |
20130038479 | Multi-Channel Sampling of Pulse Streams at the Rate of Innovation - A method includes accepting an analog input signal including a sequence of pulses of a given pulse shape. The analog input signal is distributed to multiple processing channels (40) operating in parallel. The analog input signal is sampled by performing, in each of the multiple processing channels, the operations of: mixing the analog input signal with a different, respective modulating waveform to produce a mixed signal; filtering the mixed signal; and digitizing the filtered mixed signal to produce a respective digital channel output. | 02-14-2013 |
20130187682 | SUB-NYQUIST SAMPLING OF SHORT PULSES - A method for signal processing includes accepting an analog signal, which consists of a sequence of pulses ( | 07-25-2013 |
20140160883 | FREQUENCY-DOMAIN BEAMFORMING - A method includes receiving from multiple transducers respective signals including reflections of a transmitted signal from a target. An image of the target is produced irrespective of sparsity of the received signals, by computing transducer-specific frequency-domain coefficients for each of the received signals, deriving, from the transducer-specific frequency-domain coefficients, beamforming frequency-domain coefficients of a beamformed signal in which the reflections received from a selected direction relative to the transducers are emphasized, and reconstructing the image of the target at the selected direction based on the beamforming frequency-domain coefficients. | 06-12-2014 |
20150285905 | SUB-NYQUIST RADAR PROCESSING USING DOPPLER FOCUSING - A method includes receiving a signal, which includes reflections of multiple pulses from one or more targets ( | 10-08-2015 |