Intermediate Results of Wireless Access and Multiple Antennas Technologies

In this deliverable intermediate results on multiple access and multiple antenna technologies for RESUE are described. We start with an introduction summarizing the requirements on the physical layer and multiple access technologies. The main part is dedicated to non-orthogonal multiple access, where we investigate the suitability of GFDM and IDMA for RESCUE requirements. We can show that both techniques are suitable for RESCUE. Initial considerations are carried out, how GFDM and IDMA can be combined to combine the benefits of both schemes. Furthermore, we describe a reduced-complexity algorithm for solving the power distribution for coordinated beamforming in a multi-relay scenario. It is shown that the described algorithm outperforms existing algorithms in terms of computational complexity and convergence speed. Keyword list: unpredictable environment, multiple access, multi-antenna technologies, generalized frequency division multiplexing, interleaved division multiple access, coordinated beamforming