| ID | 原文 | 译文 |
| 54547 | 接着，根据雷达接收信号与通信接收信号的频带复用程度将频谱分配模式分为传统频谱非复用和两种频谱复用模式， | Furthermore, the spectrum allocation mode is divided into traditional spectrum non-sharing allocation mode and two spectrum sharing mode according to the overlap degree of received radar signal and communication signal. |
| 54548 | 推导了雷达通信一体化系统在三种模式下的性能内界; | And the inner bounds of performance of radar and communication integration system for three spectrum allocation modes are derived. |
| 54549 | 相比于传统的单一的雷达或通信设备，雷达通信一体化系统具有易集成、小型化、高谱效等优势，其中基于线性调频的一体化信号的系统方案应用广泛。 | Compared with traditional radar or communication devices, the integrated radar and communication system is easy to be integrated and smaller with higher spectrum efficiency, in which the linear frequency modulation(LFM) based integrated system is widely used. |
| 54550 | 在一体化系统通信功能实现方案中，传统的同步技术会降低通信速率。 | In term of realizing the communication function, the traditional synchronization scheme will reduce the data rate. |
| 54551 | 针对这一问题，设计了一种包含两类线性调频载波的一体化信号， | Thus, an integrated signal consisting of two LFM carriers is designed. |
| 54552 | 并利用线性调频良好的自相关特性，提出了一种基于Costas环的时间和载波频率联合同步技术。 | Then, a Costas loop-based joint time and carrier frequency synchronization is proposed by using the good autocorrelation of LFM. |
| 54553 | 在该技术中，首先设计了基于线性调频的Costas环结构，实现对两类调频载波的跟踪， | First, a LFM based Costas loop is designed to track two LFM carriers. |
| 54554 | 然后根据两类载波的频率信息反演出通信时延和载波频偏。 | Second, the delay and carrier frequency offset are retrieved from the frequency of these two carriers. |
| 54555 | 仿真结果表明，该同步技术在不影响通信效率及雷达性能的情况下，可实现一体化信号的时频联合同步，且误码率与传统同步技术的性能相当。 | Simulation results show that the proposed technique can realize the joint time-frequency synchronization without affecting the communication efficiency and radar performance, and the bit error rate is comparable to that of traditional synchronization technique. |
| 54556 | 现代电子信息系统的应用领域在不断拓展，导致雷达和通信的带宽需求日益增长、工作频段不断重合， | With the continuously expanding of the advanced electronic information system applications, the bandwidth requirements of radar and communication are increasing, and the working frequency bands are constantly overlapping. |