ID 原文 译文
51727 5G物理层以帧为单位进行信息传递， The 5G physical layer transmits information in frames.
51728 帧同步点的准确与否将极大程度地影响后续信道的性能。 The accuracy of the frame synchronization point will greatly affect the performance of subsequent channels.
51729 针对现行同步算法检测同步点不准确的问题，文章分析了主同步信号(PSS)序列的三阶相关特性，根据此特性提出并实现了一种新型定时同步算法。 Aiming at the problem that the current synchronization algorithm detects inaccurate synchronization points, this article analyzes the third-order correlation characteristic of the Primary Synchronization Signal(PSS) sequence, and proposes a new timing synchronization algorithm based on this characteristic.
51730 仿真结果表明，当信噪比下降至-7 dB时，新算法检测同步点的准确率比传统算法提高了20%。 Simulation results show that when the signal-to-noise ratio drops to-7 dB, the accuracy of the proposed algorithm for detecting synchronization points is improved by 20% compared with the traditional algorithm.
51731 新算法的空间复杂度与传统算法一致，时间复杂度的增加也在5G同步过程的允许范围之内。 The space complexity of the new algorithm is consistent with the traditional algorithm, and the increase in time complexity is also within the allowable range of the 5G synchronization process.
51732 针对无线通信传统接收机的信道估计和译码分开处理是次优的问题，文章提出了一种联合信道估计和极化码译码的接收机模型。 In wireless communication, this separation of channel estimation and decoding is known to be sub-optimal in traditional receivers, so we propose a receiver model for joint channel estimation and polar code decoding.
51733 根据极化码译码器级联的循环冗余校验码的校验信息，接收机将译码器中部分硬判决信息再编码，然后将得到的码字反馈到信道估计器中， According to the result of the Cyclic Redundancy Check(CRC) code in decoders, the receiver will select some hard decision information to re-encode, and feedback the codeword to the channel estimator.
51734 此时相当于接收机挑选了部分码字比特作为导频，信道估计器根据新的导频重新进行信道估计。 At this time, it means that the receiver will select some codeword bits as the pilots, and the channel estimator will estimate the channel state information based on the new pilots again.
51735 文章提出的接收机模型及算法不仅减少了信道估计中导频的开销，还使得信道估计和译码两个过程相互促进，从而改善了极化码的误帧率。 The proposed receiver model and corresponding algorithm in this paper not only reduce the resources occupied by the pilots, but also boost the estimation and decoding, which can improve the performance of frame error rate.
51736 仿真结果表明，当归一化多普勒等于0. 02时，文章提出的基于硬判决反馈的接收机相比于传统的接收机有2 dB的性能增益。 For fast fading channel with the normalized Doppler spread of 0. 02, 2 dB performance improvement will be achieved when comparing with the traditional receiver.