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中文摘要：
提出了新的线性预编码方法，适用于联合处理模式下的协作多点多用户多输人多输出下行链路传输系统．该方法通过信道矩阵的扩展，引入低复杂度的矩阵分解方法，有效抑制了噪声和多用户干扰这2个因素对系统的影响，并适用于接收端各用户配置任意根天线的系统；提出了在基站总功率受限的约束条件下次优的功率分配方案．通过对算法复杂度的分析和性能仿真可知，所提方法不仅从总体上降低了中央控制站的处理复杂度，而且改善了系统性能．
英文摘要：
A novel linear precoding scheme is introduced for CoMP muhiuser multiple-input multiple-out- put downlink Systems based on joint-processing mode. By carrying out a channel extension approach and applying a matrix decomposition method with low complexity, this precoding algorithm can effectively sup- press noise and multiuser interference simultaneously and can be applied to the system configuration with arbitrary number of antennas for each user. Additionally, a suboptimal power allocation algorithm is intro- duced under the total power constraint of all the base stations. Complexity analysis and performance simu- lation demonstrate that the proposed precoding algorithm can not only degrade computational complexity of the central control station in general, but also can achieve enhanced system performance.
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