Apparatus and method for sampling and reconstruction of wide bandwidth signals below Nyquist rateSubmitted by Admin on Tue, 10/14/2014 - 07:00
Patent Number: US8861588
Inventors: Nguyen, Lam Huy; Tran, Trac D.
Patent Principal Area: Sensors & Sensor Enhancements
Publish/ Grant Date: Tuesday, October 14, 2014
Abstract: A method and system of reconstructing data signals from one of incomplete measurements comprising a receiver for receiving data signals, an ADC system operatively connected to the receiver that digitizes the received data signal at a slower rate than the Nyquist rate to obtain sparse measurements; first and second dictionaries comprising a plurality of time shifted responses recovered from the data signal; the first dictionary comprising time shifted versions of the previously observed data signals which are sampled at or above the Nyquist minimum sample rate; the second dictionary comprising time shifted versions are sampled below the Nyquist minimum, and at least one processor for reconstruction of the waveform signals by transforming the sub-Nyquist digitized output using the first and second dictionaries to produce the data signal.