Improvement in BER performance of BPSK system using diversity techniques

Multiple antennas are used with suitable signaling methods in space time diversity techniques. A significant performance gains are achieved in presence of multipath fading with the use of diversity techniques. The signals on both the transmitter and receiver sides of the antennas are combined in such a way that the BER is improved. In this paper we discussed about diversity techniques to overcome the problem of multipath fading as we have taken three conditions i.e. no diversity, maximal ratio combining and ostbc and we have find that by diversity techniques the BER is being minimized. In the present paper, the performance of a BPSK system has been investigated for three different cases, one without using diversity technique, second using OSTBC diversity technique and the third with maximal ratio combining using MATLAB.