ID 原文 译文
22325 平顶波束在无线能量传输中能够保证接收端功率密度的均匀性，对提高接收效率以及简化整流电路的设计具有重要意义。 Flat-topped beams can provide a uniform power density to the receiver in wireless power transmission, which is of great significance to improve the receiving efficiency and to simplify the design of rectifier circuit.
22326 该文首先基于 Orchard 综合，控制 Schelkunoff 单位圆零点位置，得到了实现平顶波束的条件； This paper firstly studies the conditions of realizing flat-topped beam based on the Orchard synthesis by moving the zero points positions on the Schelkunoff's unit circle;
22327 然后通过引入 Sinc 函数，给出了平顶波束的解与平顶宽度的对应关系； secondly, it introduces the Sinc function and gives the relationship between the solution and the width of a flat-topped beam;
22328 最后利用微扰法编程计算，讨论了平顶宽度与矩形系数、波纹系数、副瓣电平之间的数值关系。 finally, it discusses the relationship between the width and three parameters, rectangle coefficient, ripple factor, and side lobes level by using perturbation method and numerous calculations.
22329 以一款 10 元阵为例，实现了副瓣低于22 dB-且宽度很窄的平顶波束，验证了该文方法和结论的有效性。 An example of ten-element array is given to illustrate the procedure of achieving the narrowest flat-topped beam with a side lobe level less than 22 dB-, verifying the efficiency of the methods and conclusion in this paper.
22330 稀疏码多址接入(Sparse Code Multiple Access, SCMA)作为一种基于多维码本的非正交多址技术，能有效满足 5G 的巨连接、高频谱效率和毫秒级时延需求。 Sparse Code Multiple Access (SCMA) is a non-orthogonal multiple access technology based on multi-dimensional codebook, which can effectively address challenges in 5G such as massive connectivity, high spectral efficiency and millisecond delay.
22331 针对基于门限的消息传递算法(Message Passing Algorithm, MPA)存在低门限时误比特率(Bit Error Rate, BER)较高的问题，该文提出一种改进的 SCMA 多用户检测算法。 For the problem that threshold-based Message Passing Algorithm (MPA) has a high Bit Error Rate (BER) when the threshold is low, an improved SCMA multiuser detection scheme is proposed in this paper.
22332 所提出的算法在基于门限 MPA 的基础上，增加了对用户节点稳定性必要条件的判决，即只有符合门限条件并通过用户节点稳定性必要条件判决的用户才能被提前解码。 Based on the threshold MPA scheme, the proposed scheme adds a judgment on the necessary conditions of user node stability. The users who not only satisfy the threshold criterion but also pass the judgment on the necessary conditions of user node stability can be decoded in advance.
22333 这提高了提前判决码字的可靠性并减少了因变相硬判的检测机制造成的后验软信息损失。 This improves the reliability of codeword which is judged in advance and reduces the loss of posterior soft information caused by the detection mechanism similar to the hard decision.
22334 与基于门限的 MPA 相比，所提出的算法可使消息在低门限时迭代得更加充分，从而在低门限时仍然能够使 SCMA 用户获得较好的 BER 性能。 Compared with the threshold-based MPA scheme, the proposed scheme allows the messages to be iterated more fully at low thresholds, which makes SCMA users achieve better BER performance at low thresholds.