Efficient and low‐complexity matrix inversion scheme for massive multiple‐input multiple‐output systems using rapid numerical algorithms

Performance analysis of linear precoders with imperfect channel covariance information for multicell system

“…RNA precoding will have relatively the same complexity as TPE precoding at the specified hardware implementation while giving a better performance. This means that the increase in hardware to improve the performance of TPE precoder will suffice the RNA precoder to reduce its complexity and come as close to the complexity of the TPE precoder but with a better performance in terms of throughput [9, 10, 24]. Using the notation of [18], the RNA precoding matrix used by the BS in the j th cell is where and the scalar is carefully chosen to satisfy the power constraint in the cell.…”