Wireless & Telecommunication

Biography

Biography: M. Sudharsan, Dr. R. Sukanesh

Abstract

The instant delivery of healthcare services and sharing of medical knowledge over the wireless channel forms the basic foundation in wireless telemedicine applications. The main components of telemedicine infrastructure are terminal devices to capture biomedical signals, telecommunication systems, communication networks, remote diagnosis and proper display. The use of mobile communication gives rise to m-health services which reduces infrastructure costs and providing health care at home, rural health centres, ships, trains and airplanes. Mostly, unlicensed ISM bands are used for transmitting the medical information. With advancements in technology and increasing number of wireless devices the ISM bands and other dedicated bands like military bands and emergency communication bands are becoming increasingly crowded every day. In such scenario, recent studies shows that wide range of licensed radio spectrum are underutilized most of the time. Hence there is a need to opportunistically use those underutilized spectrum which gives rise to a promising solution called Cognitive Radio. The main challenge in implementing cognitive radio is that it should be aware of the presence and absence of a licensed user so that it can opportunistically use the licensed spectrum without interfering licensed users. We are mainly focusing on implementation of an Orthogonal Frequency Division Multiplexing based Cognitive Radio (OFDMCR) transceiver which reliably transmits and receives the biomedical signals with considerable interference rejection. The primary advantage of OFDM over single carrier schemes is its ability to cope with severe channel conditions without complex equalization filters. This proposed mechanism also facilitates the design of single frequency networks (SFNs), where several adjacent transmitters send the same signal simultaneously at the same frequency may be combined constructively. Also we proposed an improved partial transmit sequence scheme for reducing the PAPR in ECG signals for better improvement in interference cancellation.