在物理层中,本文研究了存在信道估计误差的最大比合并/选择合并的保密容量性能。在一个单输入多输出窃密信道中,信源向一个装备M根接收天线并采用最大比合并/选择合并技术处理多径信号的信宿发送保密信息。与此同时,一个窃密者装备N根接收天线并采用最大比合并/选择合并技术来提高窃密的成功率。我们分别推导了两种情况下遍历保密容量的精确和近似闭式表达式:(1)最大比合并带有信道估计误差;(2)选择合并带有信道延迟。此外,本文得到了高信噪比斜率和高信噪比功率补偿两个重要的参数,它们在高信噪比条件下决定了遍历保密容量。最后,本文通过仿真分析验证了所得到的闭式表达式的准确性。 In the physical layer, this paper studies the performance of the confidential capacity with maximal ratio combining / selective combining with channel estimation error. In a single-input-multiple-output theft channel, the source sends confidential information to a sink equipped with M receiving antennas and processing the multipath signal using the maximum ratio combining / selection combining technique. In the meantime, an intruder is equipped with N receive antennas and uses maximal ratio combining / selective combining to increase the success rate of the theft. We derive the exact and approximate closed-form expressions for the traversal of confidential capacity in two cases: (1) maximum ratio combining with channel estimation error, and (2) choice combining with channel delay. In addition, we obtain two important parameters of high S / N slope and high S / N power compensation, which determine the traversal of confidential capacity under high signal-to-noise ratio. Finally, this paper verifies the accuracy of the closed-form expressions obtained through simulation analysis.