Spatial Modulation Based Multiple Access for Ambient Backscatter Networks

Both spatial modulation (SM) and spatial multiple access (SMA) exploit spatial differences between antennas to implement modulation and multiple access. In this sense, this letter designs an SM-SMA system for ambient backscatter communication networks. SM activates a part of a tag’s antennas to carry information, and thus decreases the interference between antennas in SMA. We then propose a modifi...