Patent ID: 9197283
Filing Date: 2015-11-24
Classification: H03M,H04B

Abstract:
1. A method for sampling a wideband analog signal, the method comprising: receiving the wideband analog signal; splitting the received wideband analog signal into N parallel channels, where N is an integer; randomly demodulating each of the signals in N parallel channels with non-identical pseudo-random binary spreading codes to uniquely demodulate each of the signals in each N parallel channels; sampling each randomly demodulated signal using a sub-Nyquist sampling rate; combining each sampled signal into a sub-Nyquist digitized random demodulated signal; compressive sensing the combined sub-Nyquist digitized random demodulated signal to estimate missing samples of a full Nyquist rate uniform sample set X(n); convolving the uniform sample set X(n) with N analysis filters, each analysis filter having a different coefficient, to break the X(n) signal into N sub-bands channels; decimating output of each analysis filter using decimation ratios of M:1 to generate a sub-banded signal set Y processing the sub-banded signal set; up-sampling each processed sub-band signal by M; convolving each up-sampled sub-band signal with a corresponding synthesis filter; and combining two or more of the convolved signals to generate a non-uniform spectral partitioning of the wideband analog signal.