Before revision:  Through sparse representation theory validation, extensive empirical studies and experiments on an end-to-end acoustic ranging system implemented on resource limited off-the-shelf sensor nodes, we show that the proposed framework , together with the proposed correlation domain achieved up to two orders of magnitude better performance compared to naive approaches such as working on DCT domain and downsampling.
After revision:  Through sparse representation theory validation, extensive empirical studies and experiments on an end-to-end acoustic ranging system implemented on resource limited off-the-shelf sensor nodes, we show that the proposed framework can achieve up to two orders of magnitude better performance compared to naive approaches such as working on DCT domain and downsampling.