Sparse Distributed Estimation via Heterogeneous Diffusion Adaptive Networks Articles uri icon

publication date

  • November 2016

start page

  • 1079

end page

  • 1083


  • 11


  • 63

International Standard Serial Number (ISSN)

  • 1549-7747

Electronic International Standard Serial Number (EISSN)

  • 1558-3791


  • Recently, diffusion networks have been proposed to identify sparse linear systems which employ sparsity-aware algorithms like the zero-attracting LMS (ZA-LMS) at each node to exploit sparsity. In this brief, we show that the same optimum performance as reached by the aforementioned networks can also be achieved by a "heterogeneous" network with only a fraction of the nodes deploying ZA-LMS-based adaptation, provided that the ZA-LMS-based nodes are distributed over the network maintaining some "uniformity." Reduction in the number of sparsity-aware nodes reduces the overall computational burden of the network. We show analytically and also by simulation studies that the only adjustment needed to achieve this reduction is a proportional increase in the value of the optimum zero attracting coefficient.


  • adaptive network; diffusion lms; network mean square deviation (nmsd); l(1) norm