A new diversity technique: Rotation and space diversity

In this work, we propose a new transmit diversity technique which we call rotation and space diversity. In this technique, in-phase and quadrature components of the rotated symbols are transmitted by two transmitter antennas such that they are affected by different fading coefficients and received by single receiver antenna. Error performance of the proposed technique is studied over frequency non-selective slowly Nakagami-m fading channels. Analytical results are validated by the simulations. According to the results, diversity order of the proposed technique is the sum of diversity orders of channels from the transmit antennas to the receive antenna and with this technique error performance of the system is improved significantly.