1 research outputs found
Sum Rate Capacity of MIMO HetNet Systems in the Presence of Channel Estimation Error
In this paper, the impact of channel estimation error (CEE) on the sum-rate
capacity of multiple-input-multiple-output (MIMO) heterogeneous networks
(HetNets) is investigated. It is assumed that the receiver is a linear minimum
mean-square (LMMS) receiver. The architecture is based on the deployment of
macro base stations with large antenna arrays and a secondary tier of small
cell base stations having fewer number of antenna arrays. The key contribution
of the paper is to highlight the noticeable impact of CEE on the sum-rate
capacity of macro-cells. Furthermore, it is shown that CEE has only marginal
impact on the sum-rate capacity of small cells. Simulations for the sum rate of
macro users versus that of the small cell users for time-division duplex (TDD)
are performed and the results are compared with the case when channel
estimation error is present