Abstract This contribution is focused on the design and analysis of an innovative multiple access scheme that exploits the intrinsic properties of the wireless environment to improve the multiuser environment, entitled Channel Division Multiple Access (ChDMA). Such a design allows simultaneous multiuser accessing to a common destination by considering the channel impulse response (CIR) of each user as a signature. Benefitting... This contribution is focused on the design and analysis of an innovative multiple access scheme that exploits the intrinsic properties of the wireless environment to improve the multiuser environment, entitled Channel Division Multiple Access (ChDMA). Such a design allows simultaneous multiuser accessing to a common destination by considering the channel impulse response (CIR) of each user as a signature. Benefitting from the natural diversity of the wireless environment, the receiver is able to detect and demodulate the received signals by using the channel as a code under the assumption of the channel state information. We analyze the performance of the ChDMA integration in MBOFDM UWB high data rate channel in a random environment. The spectral efficiency criterion is chosen to investigate the performance analysis using MMSE receiver. Additionally, we analyze an asymptotic analysis of MMSE detector behavior taking into account the channel eigenvalues distribution with the associated spectral efficiency. A concept of power delay profile (PDP) has emerged from this work to investigate its impact into the spectral efficiency. Read More Read Less

Abstract This paper proposes an aim to provide blind navigation information via audible messages and haptic feedback, helping the visually disabled to localize where they are and their mobility path way. This also proposes a method that allows blind people to enter notes and control device operation via Braille capacitive touch keypad instead of sending SMS by entering the number and... This paper proposes an aim to provide blind navigation information via audible messages and haptic feedback, helping the visually disabled to localize where they are and their mobility path way. This also proposes a method that allows blind people to enter notes and control device operation via Braille capacitive touch keypad instead of sending SMS by entering the number and text. An emergency button triggers an SMS from the GSM module that will send the present location (GPS coordinates) of the user to a remote phone number asking for help. In addition, the device provides the information needed to the user, in audio format using audio codec, including time, calendar, and object color using a 24-bit color sensor, obstacle distance using SONAR, navigation direction, ambient light and temperature conditions. Read More Read Less

Abstract This study aims to diagnose the significant differences between the Malaysian demographic characteristics and intention to adopt edutainment services in digital home. Questionnaires have been distributed to 339 respondents who reside in Malacca, Kuala Lumpur and Selangor. The results of the study revealed that there is a significant difference between gender and intention to adopt edutainment services in digital home.... This study aims to diagnose the significant differences between the Malaysian demographic characteristics and intention to adopt edutainment services in digital home. Questionnaires have been distributed to 339 respondents who reside in Malacca, Kuala Lumpur and Selangor. The results of the study revealed that there is a significant difference between gender and intention to adopt edutainment services in digital home. It is further suggested that gender should be given some consideration in future research efforts. The research and practical implications of these results are discussed and opportunities for future research are provided. Read More Read Less

Abstract This work faces the problem of the HW/SW co-design of dedicated systems based on heterogeneous parallel architectures. In particular, it proposes an extension of a previous system-level design space exploration (DSE) approach able to suggest to the designer an HW/SW partitioning of the application specification and a mapping of the partitioned entities onto an automatically selected heterogeneous multi-processors architecture where... This work faces the problem of the HW/SW co-design of dedicated systems based on heterogeneous parallel architectures. In particular, it proposes an extension of a previous system-level design space exploration (DSE) approach able to suggest to the designer an HW/SW partitioning of the application specification and a mapping of the partitioned entities onto an automatically selected heterogeneous multi-processors architecture where each processor could be also homogeneous multi-core. The extended modeling strategy and the description of the adopted heuristic/metrics represent the core of the paper Read More Read Less