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In this paper, an improved channel estimation method in discrete multi-tone (DMT) communication systems based on sparse Bayesian learning relevance vector machine (RVM) method is presented. The Bayesian frame work can obtain sparse solutions to regression tasks utilizing models linear in parameters. By exploiting a probabilistic Bayesian learning framework, the sparse Bayesian learning provides the...
A mobile monitoring system utilizing short message service with low-cost hardware equipment has been developed and implemented to enable transmission of the temperature and ECG signal of a patient. Communication between a mobile phone client and a remote smart-phone (or PDA) consultation/server unit is achieved through programming the client using attention commands (at-commands), and the protocol...
A cost effective and easy-to-use smart-phone based ultrasonic wireless ranging, and collision warning system that is appropriate to complement the long-cane of the visually impaired persons is presented in this paper. This system is intended to increase the safety and the reliability of the mobility aid of the blind while reducing cost by utilizing popular wireless technologies as Bluetooth and a...
A mobile monitoring system utilizing Bluetooth and Multimedia Messaging Service (MMS) with low-cost hardware equipment has been developed and implemented to enable transmission of an Electrocardiogram (ECG) signal and body temperature of a patient. Communication between a smart mobile phone and the ECG and temperature acquisition apparatus is implemented using the popular Personal Area Network protocol...
In this paper, we address the topic of pilot aided multi-user channel estimation for a proposed 4G wireless system that uses OFDM in a synchronous SDMA environment, which can also be regarded as a Multiple-Input Multiple-Output (MIMO) environment. An Iterative Low Complexity (ILC) estimation technique for Time-Invariant (TI) channels that utilizes extrapolation and specially designed pilot sequences...
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