ID | 原文 | 译文 |
17785 | 该天线是以赋形主反射面共用为基础,等效为2副单馈源单偏置反射面天线和1副双偏置格里高利型赋形反射面天线,分别产生赋形波束、固定点波束和有限扫描点波束。 | The shapedmain reflector is shared by three beams, and the antenna is equivalent to two single-reflector antennas withsingle-feed for each beam and a pair of dual offset Gregorian shaped reflector antennas, and generating the contoured, un-scanned and scanned pencil beam, respectively. |
17786 | 通过对一副口径为1.2 m的天线各个波束进行仿真实验,赋形波束在Ku收、发频段时波束覆盖区边缘(EoC)方向性系数为27.5 dBi,固定点波束在C收、发频段时天线口径效率高于70%, | The proposed method is successfully applied to a1.2 m hybrid reflector antenna. Simulations and experimentations of each beam has been performed. The Edgeof Coverage(EoC) directivity over service area is 27.5 dBi for contoured beam in Tx and Rx working frequencyof Ku-band, and the un-scanned pencil beam has a aperture efficiency higher than 70% in Tx and Rx workingfrequency of C-band. |
17787 | 通过将赋形副反射面及对应馈源横向偏焦实现Ka收、发频段的点波束在服务区内外的扫描。 | Meanwhile, the scanned pencil beam inside and outside the service area is realized by thelateral defocus of the sub-reflector and the corresponding feed in Tx and Rx working frequency of Ka-band. |
17788 | 仿真结果表明,该混合反射面天线可实现C/Ku/Ka频段的同时通信任务。 | Simulation results show that the hybrid reflector antenna can realize C/Ku/Ka-band communication tasks simultaneously. |
17789 | 针对5G非授权频段通信(NR-U)场景,该文提出一种新型的低时延随机接入机制。该机制分别在随机接入回复窗口(RARW)与竞争窗口中加入了信道空闲计时器,来减少UE因在非授权频段进行竞争接入所引起的时延;此外该机制还加入了请求发送/允许发送机制,来解决隐藏节点对随机接入过程的影响。 | For the 5G New Radio in Unlicensed (NR-U) spectrum scenario, a novel random access mechanism is proposed, which first adds the channel idle timer in Random Access Response Window (RARW) and contention resolution window to reduce the accessing delay caused by the contention-based accessing and employs the Request To Send/Clear To Send (RTS /CTS) mechanism to address the hidden node issue. |
17790 | 该机制可降低传统机制中由于未考虑非授权频段特性及隐藏节点问题所引起的随机接入时延问题。 | The mechanism can alleviate the latency incurred by the legacy mechanism which did not consider the intrinsic attribute of unlicensed band and the hidden node problem. |
17791 | 该文首先对NR-U场景中的传统随机接入机制进行分析并进行问题定位; | Specifically, the legacy random access mechanismapplied to NR-U is analyzed. |
17792 | 其次,提出新型随机接入机制的网络实体交互流程,建立新型机制与传统机制中的网络实体交互时序模型; | Then, the detailed elaboration of the network entity interaction sequence definedin novel mechanism is proposed. |
17793 | 最后以数学推导和仿真的方法对新型机制与传统机制进行对比评估,相关结果显示出新型机制在平均耗时方面的优势。 | Finally, the performance evaluation processes are carried out in the way ofmathematical modeling and experimental simulation, and the analysis result demonstrates that the novelscheme outperforms the benchmark one in the respect of the average random access delay. |
17794 | 该文针对应用非正交多址接入(NOMA)技术的异构蜂窝网络,在考虑层间层内干扰的情况下,提出一种能效最大化的功率分配算法。 | This paper proposes a power allocation scheme for energy efficiency maximization in a downlink Non-Orthogonal Multiple Access (NOMA)-based Heterogeneous Network (HetNets) with considering the out-of-cellinterference and in-cell interference. |