异构网络下的改进校准方案

异构网络中通过不同节点的协同多点传输进行协同波束赋形,可以消除小区间干扰，而系统得到信道信息的准确性直接影响协同波束赋形的性能。提出了一种基于校准矩阵法异构网络下的改进校准方案，无需系统测量影响信道互易性的增益因子，突破常见优化校准矩阵算法对收发端天线数目的约束。通过链路级仿真和先进的长期演进技术下的异构网络系统级仿真对该方案进行仿真验证，仿真结果表明该方案能够有效地恢复时分双工系统的信道互易性，修复系统的误码率以及吞吐量性能。

Improved calibration method for heterogeneous network

Coordinated multiple points transmission (CoMP) could eliminate the inter cell interference in heterogeneous network by promoting coordination of different nodes. The performance of CoMP depends heavily on the accuracy of channel information measured. An improved calibration method based on calibration matrix method heteogeneous network is proposed. It works without the measurement of channel impact factors and it avoids restriction of the antennas configuration. The results from simulations of link level simulation and system level simulation of long term evolution advanced heterogeneous network demonstrated that the proposed method restored the reciprocity of time division duplexing channel and the performance of bit error rate and throughput.