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混合最大后验概率和概率数据关联的软输出多天线检测算法 总被引:1,自引:1,他引:0
根据PDA算法的原始形式,提出一种混合MAP-PDA的检测算法。现有的MAP算法和PDA算法可以看作是该算法的两种特殊情况。分析和仿真表明,该算法可以方便地调整控制参数,从而实现最大后验概率算法和概率数据关联算法之间不同程度的性能和复杂度折衷。 相似文献
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To bridge the performance gap between original probability data association (PDA) algorithm and the optimum maximum a posterior (MAP) algorithm for multi-input multi-output (MIMO) detection, a grouped PDA (GP-PDA) detection algorithm is proposed. The proposed GP-PDA method divides all the transmit antennas into groups, and then updates the symbol probabilities group by group using PDA computations. In each group, joint a posterior probability (APP) is computed to obtain the APP of a single symbol in this group, like the MAP algorithm. Such new algorithm combines the characters of MAP and PDA. MAP and original PDA algorithm can be regarded as a special case of the proposed GP-PDA. Simulations show that the proposed GP-PDA provides a performance and complexity tradeoff between original PDA and MAP algorithm. 相似文献
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高层建筑物设计通常是把上部结构和地基基础分开来进行计算分析,这种不符合实际的假定必定会带来结果的偏差.因此有必要考虑彼此间的耦合作用,文中对多高层建筑上部结构和地基基础共同作用的差状态进行研究.在考虑钢筋混凝土框架高层建筑上部结构和地基基础共同作用情况下,对差异衰减理论进行讨论:求得连分式衰减理论中实矩阵的矩阵特征值、特征向量,进一步对沉降模式进行分析.之后结合上部结构的变形规律,尝试给出一种基于此规律的适合于工程实际应用的计算方法. 相似文献
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二缩水甘油醚的一步合成 总被引:4,自引:0,他引:4
用相转移催化剂合成乙二醇二缩水甘油醚和丁二醇二缩水甘油醚将合成路线简化为一步,产率分别为33.4%和40.7%。气相色谱、色质联用红外光谱鉴定了产物的组成及结构。 相似文献
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To bridge the performance gap between original probability data association(PDA) algorithm and the optimum maximum a posterior(MAP) algorithm for multi-input multi-output(MIMO) detection,a grouped PDA(GP-PDA) detection algorithm is proposed.The proposed GP-PDA method divides all the transmit antennas into groups,and then updates the symbol probabilities group by group using PDA computations.In each group,joint a posterior probability(APP) is computed to obtain the APP of a single symbol in this group,like the MAP algorithm.Such new algorithm combines the characters of MAP and PDA.MAP and original PDA algorithm can be regarded as a special case of the proposed GP-PDA.Simulations show that the proposed GP-PDA provides a performance and complexity tradeoff between original PDA and MAP algorithm. 相似文献
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