We have tried to describe two aspects of MIMO channels: channel capacity and channel modeling. We have analyzed the channel capacity of static and fading MIMO channels when the channel side information is available both at the transmitter and receiver, and when it is available only at the receiver. We have then modeled the MIMO channel in physical and angular domains to understand how it provides spatial multiplexing with the help of degrees of freedom. In physical domain modeling, we have modeled the MIMO channel in terms of individual physical paths. In angular domain modeling, we have described the MIMO channel with respect to fixed spatial basis functions defined by fixed angles that are determined by the spatial resolution of the antenna arrays. All the simulations have been performed on MATLAB 7.4.0.287 (R2007a).

This project is very useful in industries to eliminate the harmonics. In any industries like thermal power plant, hydral power plant the producing supply is 50 hz frequency a.c supply purely sinusoidal, but it is reached to our home its become multiple frequency and it creates a harmonics. using this project we can eliminate the harmonics at the supply it self, it is possible to reduce the harmonics at the supply level.because of harmonics lot of losses are developed, because of this losses reliability is reduced, device life time will be reduces so by using the active power filter we can reduce the harmonics and maintain power factor unity. here we are using the hysteresis current controlled technique to generate the gating signals to turn on the inverter then inverter acts as a filter than it produces some compensating currents to canceled out the harmonics.