ID 原文 译文
51517 在适当位置固定引线可以将管脚寿命提高到无限寿命。 The pin life can be increased to infinite life by fixing the lead wire appropriately.
51518 透镜天线阵列下毫米波大规模多输入多输出(MIMO)系统通过波束选择可以大大减少所需的射频链数目，解决系统硬件成本和能耗过高的问题， To deal with issue of high hardware cost and energy consumption, beam selection is used in the lens antenna array based millimeter-Wave(mmWave) massive Multiple-Input Multiple-Output(MIMO) system to reduce the required number of radio frequency chains.
51519 然而，波束选择需要基站端获取准确的信道状态信息。 However, beam selection requires the base station to acquire the accurate channel state information.
51520 对此，文章首先利用波束空间的结构特性，采用基于支持检测(SD)的信道估计方案，以较低的导频开销和计算复杂度对大尺寸信道进行更加可靠的估计; To solve this problem, we first use the structural characteristics of beamspace and adopt a Support Detection(SD)-based channel estimation scheme to estimate the large channel with lower pilot overhead and computational complexity.
51521 其次受仿生学中蚁群优化(ACO)算法的启发，文章提出了一种基于SD估计信道的ACO波束选择方案， Then, inspired by Ant Colony Optimization(ACO) algorithm in bionics, an ACO beam selection scheme based on SD channel estimation is proposed.
51522 该方案既能有效地避免用户间波束的干扰，又能最大限度地提高系统和速率; The scheme can not only avoid the interference of beams between users, but also maximize the system sum rate.
51523 最后，仿真结果表明，该方案能够得到计算复杂度显著降低的近优解， Finally, the simulation results show that the proposed scheme can obtain a near-optimal solution with significantly lower computational complexity,
51524 在提高系统和速率方面优于现有方案。 and it is superior to the existing schemes in improving the system sum rate.
51525 对数正态信道是描述弱湍流条件下无线光通信衰落的有力数学工具。 Lognormal channel is a powerful mathematical tool in modeling fading effects for wireless optical communications over weak turbulence channels.
51526 然而精确的对数正态信道性能表达式带有无法化简的多重积分，难以揭示信道参数和性能的联系，不利于性能估计。 However, exact analysis involving lognormal channels involves multi-fold integrals, which reveal little insights into the relation between the system performance and the channel parameters.