利用半正定规划和最小均方误差准则，提出了一种最小化发射功率的MIMO认知波束形成算法，与已有对偶算法相比，降低了发射功率，提高了系统性能。此外，还提出了SINR均衡的波束形成算法，解决了MIMO认知网络中认知用户的均衡通信问题。数值仿真结果表明，新算法在避免对主用户造成干扰的同时，能保证每一个用户的通信质量，均衡SINR水平得到了大幅提升。%An iterative SDP-MMSE algorithm based on semidefinite programs (SDP) and minimum mean squared error (MMSE) was introduced to minimize the total transmit power. And a further approach on the max-min fairness beam-forming was presented. Simulation results demonstrate that proposed algorithms have superior performance in terms of total transmitted power and signal-to-interference plus noise ratio (SINR) as compared to the existing ones.
展开▼
