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Filter bank multi-carrier based on offset quadrature amplitude modulation (FBMC/OQAM) suffers from inter-symbol interference and inter-subchannel interference in multi-path fading channels. By exploiting the special structures of the FBMC/OQAM signal and the resulting correlation matrix and assuming perfect estimation of channel and noise power, we study the properties of the decision feedback equalizer (DFE) designed by the minimum mean square error criterion. The study leads to efficient and mathematically equivalent computation of DFE coefficients. Consequently, the DFE requires a smaller complexity in computing the equalizer coefficients than the linear equalizer, while achieving a significant performance gain in highly frequency-selective channels. Building upon the proposed efficient computation of DFE, we develop DFE-based detectors—namely, two-stage DFE and multi-band DFE—so that a better detection performance can be obtained more efficiently. Complexity analysis and simulation results demonstrate the efficacy of the proposed computation method and the DFE-based detectors. [ABSTRACT FROM AUTHOR]

This study proposed a dynamic pulse wave velocity (PWV)-based biomedical parameter in assessing the degree of atherosclerosis for the aged and diabetic populations. Totally, 91 subjects were recruited from a single medical institution between July 2009 and October 2010. The subjects were divided into four groups: young healthy adults (Group 1, n = 22), healthy upper middle-aged adults (Group 2, n = 28), type 2 diabetics with satisfactory blood sugar control (Group 3, n = 21), and unsatisfactory blood sugar control (Group 4, n = 20). A self-developed six-channel electrocardiography (ECG)-PWV-based equipment was used to acquire 1000 successive recordings of PWVfoot values within 30 min. The data, thus, obtained were analyzed with multiscale entropy (MSE). Large-scale MSE index (MEILS) was chosen as the assessment parameter. Not only did MEILS successfully differentiate between subjects in Groups 1 and 2, but it also showed a significant difference between Groups 3 and 4. Compared with the conventional parameter of PWVfoot and MEI on R–R interval [i.e., MEI (RRI)] in evaluating the degree of atherosclerotic change, the dynamic parameter, MEILS (PWV), could better reflect the impact of age and blood sugar control on the progression of atherosclerosis. [ABSTRACT FROM AUTHOR]