LowerBoundon Time-Delay Estimation Error of
Aawatif Menouni Hayar, Christian Bonnet · 2007
Inthis work,westudyfundamental limitation tothe performance oftime-delay estimation schemes ofIR-UWBsignals. We arespecially interested inderiving lowerboundonthemean squareerror(MSE).AsUWB systems areexpected tooperate atlowsignal-to-noise ratio (SNR)(80211.15.4 low-power lowrate standard), theimproved Ziv-Zakai lowerbound(IZZLB)(1) is thenmoresuited tocharacterize thelowerboundontheMSE, thantheCramer-Rao lowerbound(CRLB). We express thenthe lowerboundonMSE ofmaximumlikelihood estimator basedon perfect knowledge ofthe2ndorderstatistics ofthereceived signal bymeanoftheIZZLB.