ID 原文 译文
15385 经实际测试,利用该方法对PTP时钟进行测量,能够获得优于10 ns的测量精度。 The test results show that using this method to measure PTP clock, the measurement accuracy is better than 10 ns.
15386 激光回波仿真系统能够根据所模拟的目标生成高频高精度模拟回波信号。 The laser echo simulation system can generate high-frequency and high-precision analog echo signals according to the simulated target.
15387 提出一种激光回波仿真系统设计方案,系统中采用FPGA生成延时信号,可以对回波信号实现亚皮秒级的延时精度； This paper presents a design scheme of a laser echo simulation system. The system uses FPGA to generate a delay signal, which can achieve a sub-picosecond delay accuracy for the echo signal.
15388 对光纤通信协议进行了优化,用FPGA实现基于该协议的回波信号传输系统,摆脱了现有方案中对反射内存卡的依赖性,提升了数据的刷新频率。 This paper optimizes the optical fiber communication protocol and uses FPGA to implement the echo signal transmission system, which has got rid of the dependence on the reflective memory card in the existing scheme, and has increased the data refresh frequency.
15389 仿真结果表明,所设计的仿真系统数据传输速度达到1.6 Gb/s,回波精度达到125 ps,距离分辨率达到0.05 m。 The simulation results show that the data transmission speed of the simulation system designed in this paper reaches 1. 6 Gb/s, the echo accuracy reaches 125 ps, and the distance resolution reaches 0. 05 m.
15390 为基于激光阵列的高精度激光制导半实物仿真系统的研制奠定了基础。 It laid the foundation for the development of high-precision laser guidance semi-physical simulation system based on laser array.
15391 随着卫星通信技术的发展,宽带频谱越来越少,提高频谱利用率就愈来愈重要,可变编码调制技术(VCM)就是一种解决方案。 With the development of satellite communication technology, the broadband spectrum is becoming less and less, so it is more and more important to improve the spectrum efficiency.
15392 根据DVB-S2标准中对调制信号的格式的定义,当调制方式在QPSK、8PSK、16APSK、32APSK中切换时,帧头和导频仍然采用π/2BPSK进行调制,基于此提出了对导频和帧头部分进行高码率可变编码的载波同步和均衡处理。 The variable code modulation technology is a solution. According to the definition of modulation signal format in DVB-S2 standard, when the modulation mode is switched in QPSK, 8 PSK, 16 APSK and 32 APSK, π/2 BPSK is still used for frame head and pilot. Based on this, a carrier synchronization and equalization processing based on pilot and frame header with variable coding rate is proposed.
15393 实现结果表明,能正常对不同调制方式进行解调,同时保证在不同调制方式进行切换时仍能稳定完成解调,测试结果表明解调性能偏离理论值小于3 dB。 The results show that different modulation modes can be de-modulated normally, while maintaining the same time. The test results show that the demodulation performance deviates from the theoretical value by less than 3 dB.
15394 由于只采用了一种载波同步方法和均衡方法,实现方法简单,节省了FPGA资源。 Because only one carrier synchronization method and equalization method are used, which is simple and which saves the whole FPGA resource.