Abstract: Wireless multimedia has created boom in today’s era. It is just a fraction of seconds to get information at any time anywhere. All these because of the development of multicarrier communication system, OFDM, which provides high data rate as well as high speed. With that channel estimation becomes more challenging. In such multicarrier systems the time varying channel is often estimated based on different algorithms. These algorithms are basically categorised as blind and non-blind channel estimation techniques. Due to the limitations of blind algorithms such as requirement of the statistical knowledge of received signal, the non-blind i.e. pilot aided channel estimation have become more popular. In such techniques known symbols to the receiver called pilots are inserted in the OFDM data symbols and they should be close enough to fulfil the Nyquist sampling theorem for pilot spacing [1].

• Publication Date: 23-Jun-2012
• DOI: 104
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Abstract: This paper presents system design aiming to provide LOW COST solutions to the problems encountered in acquiring Electrocardiograph(ECG) signals in monitoring mode (ECG bandwidth--0.5-35Hz) from the body, as well as providing remote transmission of ECG data through Telemetry. Two separate devices have been constructed to achieve the overall goal. Overall hardware design includes three parts namely front end analog section (acquisition), processing section, and transmission section (telemetry). The software part is implemented using visual basic to get real time data display which is required for continuous monitoring of the patient. This paper aims on achieving minimum possible cost for acquiring ECG signal. The system implemented also allows advance warning operations of heart abnormalities.

• Publication Date: 23-Jun-2012
• DOI: 106
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