Joint MMSE transceiver design for downlink heterogeneous network

摘要: In this paper, we propose a minimum mean square error (MMSE) based transceiver design scheme for downlink multiple-input multiple-output two-tier heterogeneous network with general linear equality per-cell power constraints. Three practical channel models both perfect and imperfect state information are used in simulations. each model, consider two system configurations, data transmission schemes cellular cooperation scenarios. Our study shows that the proposed MMSE is more flexible than interference alignment (IA) scheme. For cases where IA-type applicable, generally outperforms terms of average sum rate bit rate, but computationally complex