A Group Testing Based Spectrum Hole Search Using a Simple Sub-Nyquist Sampling Scheme

In this paper, the authors consider the problem of finding a spectrum hole of a specified bandwidth in a given wide band of interest. They propose a new, simple and easily implementable sub-Nyquist sampling scheme for signal acquisition and a spectrum hole search algorithm that exploits sparsity in the primary spectral occupancy in the frequency domain by testing a group of adjacent subbands in a single test. The sampling scheme deliberately introduces aliasing during signal acquisition, resulting in a signal that is the sum of signals from adjacent sub-bands. Energy-based hypothesis tests are used to provide an occupancy decision over the group of subbands, and this forms the basis of the proposed algorithm to find contiguous spectrum holes.

Provided by: Institute of Electrical and Electronics Engineers Topic: Networking Date Added: Nov 2012 Format: PDF

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