ID 原文 译文
58138 提出一种基于非对称共面带( ACS) 馈电的高隔离度小型化分集天线结构. A high isolation compact diversity antenna structure based on asymmetric coplanar band( ACS) feed is proposed.
58139 使用 ACS 作为天线馈电结构可使天线体积减小约 50% .引入地板延伸枝节作为去耦合结构，使天线间端口隔离度大于 15 dB，其中最高隔离度达到30 dB. Use of ACS as the antenna feed structure reduces the antenna volume by about50% ; by introducing the floor extension branch as a decoupling structure，the high antenna port isolationis achieved to 15 dB and is highest to 30 dB.
58140 实验结果表明，该分集天线可满足 2.4 /5.2 GHz WLAN 和 2.6 /3.5 GHz LTE 的通信需求. It is shown that the diversity antenna can satisfy the 2. 4 /5. 2 GHz WLAN，2. 6 /3. 5 GHz LTE communication requirements.
58141 由多维星座经星座运算得到用户码本的典型稀疏码多址接入( SCMA) 码本设计方案中，多维星座设计的复杂度和最优星座运算确定的难度实际上增加了码本设计难度，对此，分析了 SCMA 码本对消息传递算法( MPA) 具体过程的影响，提出了一种以最大化距离谱最小元素为准则的 SCMA 码本设计方案. Aiming at the problem that the complexity of multidimensional constellation design，and thedifficulty of determining optimal constellation operators actually increase the difficulty of codebook designin the typical sparse code multiple access( SCMA) codebook design scheme，which gets user codebooksfrom a multidimensional constellation via the constellation operation，the influence of user codebooks onthe specific process of message passing algorithm( MPA) is analyzed，and a codebook design schemebased on maximizing the minimum element of the distance spectrum is proposed.
58142 所提方案将多维星座的设计和星座运算的确定过程转化为简单的码本设计参数选择过程. The scheme transformsthe process of multidimensional constellation design，and constellation operators determination into a simple codebook design parameter selection process.
58143 在不影响用户码本唯一可译码性的前提下，通过替换部分码本设计参数，降低了参数选择复杂度. Without affecting the unique decodability of user codebooks，the complexity of parameter selection is reduced by replacing some codebook design parameters.
58144 仿真结果表明，采用所提基于距离谱的码本设计方案与现有的码本设计方案相比，系统的误比特率性能有显著改善. Simulations show that compared with the existing SCMA codebook design schemes，the scheme based ondistance spectrum can significantly improve the bit error rate performance of system.
58145 在无人机毫米波多用户通信网络中，基于波束空间多输入多输出系统提出了一种利用无人机移动特性的波束选择方法. A millimeter-wave unmanned aerial vehicle ( UAV) cellular multiuser network is investigatedbased on beamspace multiple-input and multiple-output. A beam selection scheme assisted by UAV mobility is proposed.
58146 首先，以减少用户间的能量泄漏为目标设计了无人机基站的最优部署位置; At first，an optimal deployment position of UAV base station is identified with the aimof reducing power leakage problem among users.
58147 然后，为避免不同用户选择同一波束造成射频链路浪费的情况，提出了一种通过用户接收能量衡量的波束重新选择准则. Afterwards，a simple power focused beam selection criterion called beam reselection is introduced to avoid the problem that the same beam is selected by different users，which will cause the waste of radio-frequency chains.