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Ranging with energy detectors enables low-cost implementation. However, any interference can be quite detrimental to range accuracy. We develop a method that performs nonlinear filtering on the received signal energy to mitigate multiuser interference (MUI), and we test it over time hopping and direct sequence impulse radio ultra-wideband signals. Simulations conducted over IEEE 802.15.4a residential line of sight ultrawideband multipath channels indicate that nonlinear filtering helps sustain range estimation accuracy in the presence of strong MUI. £.
Sahinoglu, Z., & Guvenc, I. (2006). Multiuser interference mitigation in noncoherent UWB ranging via nonlinear filtering. Eurasip Journal on Wireless Communications and Networking, 2006, 1–10. https://doi.org/10.1155/WCN/2006/56849