Author : Varalika, Mukesh Kumar, A.K.Jaiswal and Rohini Saxena

A quick and accurate estimation of the tissue impedance system over a wide range of excitation frequencies with a low cost wireless transmission technique has been presented. Windowing function is use to reduce the lobe effect. Signal is processed through cross- correlator and FFT to provide quick and accurate result for tissue impedance measurement. Impedance measurement helps to find out the tissue health. This method gives economy in computing power. Its simple design, low power consumption and quickness of result calculation make it different and useful technique for tissue impedance measurement. Here a method of fast and accurate impedance measurement and its wireless transmission through Wi-Fi has been proposed. QPSK and QAM modulation technique has been applied and it has been found that QAM based transceiver is more efficient. It has low noise power and higher modulation error ratio.

Keywords: Tissue impedance, Wi-Fi, QPSK, QAM.

Article published in International Journal of Current  Engineering  and Technology, Vol.4,No.3 (June- 2014)