i Hi to everyone,
I am student, and i have to do project "Measuring bioimpedance using FFT" for my college to pass the exam. I got several points (instructions) how to do it but they are poorly explained and I am not enough good programer. Up to now i made some points but I don't know if they are good 
..... I will write these instructions, and i please some good programers to help me ...
1. First task is to configure A/D and D/A conversion of two analog (voltage) channels, with some parameters like: frrequency of generated output samples (100 kHz), frequency of signal( 1kHz), frequency of sampling of input signals...
2. Second task is connecting analog output directly on the analog inputs and compare input and output signals.
3. Calculate the FFT and show the results.
4. Analysis of the phase shift of the two input signals.
5. Compensation of the phase shift
6. I stopped on this point because I don't have the idea how to realize that. I have to calculate the impedance based on informations of amplitude and phase, and the information of referent resistor. I have to calculate the impedance (the real and the imaginary part), reaktance and the C or L. Also i have to calculate the amplitde and phase of these.
I attached my project so i please help
After that i have to measure the bioimpedance, thus i have to replace the components and measure the impedance from several points of my skin... but these are next problems....
Best regards