Pilot Reuse for Vehicle-to-Vehicle Underlay Massive MIMO Transmission

Pilot overhead constitutes a bottleneck in vehicle-to-vehicle (V2V) underlay massive multiple-input multiple-output (MIMO) cellular networks. To decrease the pilot overhead and further improve the spectral efficiency, we propose pilot reuse for V2V underlay massive MIMO transmission. First, based on the angle domain sparsity of massive MIMO channels, we derive the channel angle domain condition un...