Joint Maximum-Likelihood and MMSE Channel Estimator for UWB Communications |
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Authors: | Lei Zhou Ê Shidong Zhou ì Yan Yao Ú |
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Institution: | Department of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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Abstract: | Channel estimation and synchronization are crucial problems in coherent ultra wideband (UWB) receiver designs. A joint maximum-likelihood (ML) and minimum-mean-square-error (MMSE) channel esti- mation scheme was developed for more precise channel estimates based on the assumption of exponential multipath decay. The performance improvement was analyzed theoretically with a computer simulation us- ing IEEE 802.15.3a ultra-wideband channel models. Theoretical and simulation results show that the scheme further improves the estimation performance of channel gains and multipath delays compared with the traditional ML channel estimator. |
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Keywords: | ultra wideband (UWB) maximum-likelihood minimum-mean-square-error (MMSE) channel es- timation prior statistical knowledge IEEE 802 15 3a |
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