Before revision:  The key idea is to compress the  signal samples on the mote platform by efficient random projections and transfer them to a central device , where a convex optimization process estimates the range by exploiting its sparsity in our proposed correlation domain.
After revision:  The key idea is to compress the signal samples on the mote platform by efficient random projections and transfer them to a central device ; where a convex optimization process estimates the range by exploiting its sparsity in our proposed correlation domain.