sequence modulation中文是什么意思

• 顺序调制

• sequence    n. 1.继续；接续；连续。 2.顺序；程序；次第；关系 ...
• modulation    n. 调整，调节；(声调的)抑扬，变化；【音乐】转调，变 ...
• direct sequence modulation    直接序列调制
• dsm direct-sequence modulation    直接序列调制
• modulation    n. 调整，调节；(声调的)抑扬，变化；【音乐】转调，变调；【无线电】调制。 amplitude modulation 振幅调制，调幅。 frequency modulation 频率调制，调频。 overmodulation 过(度)调(制)。
• no-modulation    无调谐
• by sequence    依次，逐一
• in sequence    按顺序; 串联; 顺次, 挨次; 依次,逐一; 依次，逐一
• in-sequence    串联顺次
• sequence    n. 1.继续；接续；连续。 2.顺序；程序；次第；关系；关联。 3.后果；结果；接着发生的事；后事；后文。 4.【数学】数列；序列；数贯。 5.【无、计】指令序列；定序。 6.【计算机】顺序机〔将信息项目排成顺序的机器〕。 7.【音乐】用不同音调反复演奏一组乐句。 8.【天主教】宣讲福音前唱的圣歌。 9.【牌戏】顺。 10.【电影】(描述同一主题的)连续镜头；片断，插曲；场景。 a logical sequence 条理；逻辑顺序。 a causal [physical] sequence 因果关系。 the natural sequence to [for] folly 愚笨行为的必然结果。 in rapid sequence 一个接着一个；紧接着。 in regular sequence 挨次；按次序；逐一；有条不紊地。 in sequence 挨次；顺次；逐一。 sequence of tenses 【语法】时态的配合[接续，呼应]。
• frequency modulation phase modulation    调频调相
• earthquake sequence, seismic sequence    地震序列
• absorbing modulation    吸收调制
• absorption modulation    吸收灯; 吸收调制
• acoustooptic modulation    声光调制
• adaptive modulation    自适应调制
• admittance modulation    导纳调制
• af modulation    音频调制
• aliasing modulation    混叠调制
• alternation modulation    交变调制
• amount of modulation    调制率, 调制度百分数
• amplifier modulation    放大器调制
• amplitude modulation    【无线电】振幅调制。
• analog modulation    模拟灯; 模拟调制
• angle modulation    调角; 角调制; 角度调制; 相角灯

• Firstly , the paper summarize the basic knowledge of spread spectrum communication , point out that the baseband of ds signals are divided into short pn sequence modulation and long pn sequence modulation
  首先简要概述了扩频通信的基本知识,指出基带ds信号可分为短pn码调制和长pn码调制。
• In this paper , the principle of spread spectrum communication and direct - sequence modulation is introduced . the design principle and constitution of remote concentrated ammeter reading system based on the technique is proposed and the design of spread spectrum communication unit of power line is shown . it is stressed on the synchronization system of spread spectrum communication chip and the two processes of synchronization , manhunt and tracking , are analyzed
  文章介绍了扩频通信原理及直接序列扩频，并且介绍了基于该技术的远程集中抄表系统的设计原理和系统组成，给出了电力线扩频通信单元的设计，着重介绍了低压载波通信芯片中同步系统并分析了同步过程的两个阶段：搜捕阶段和跟踪阶段。
• Thirdly , the power spectrum reprocessing approach and cepstrum approach are used to estimate the period of pn sequence . a new method that a power spectrum reprocessing based on delay and multiply is introduced to estimate the period of long pn sequence modulation signals . the algorithm is deduced and the theory simulation results are given
  采用二次功率谱法和倒谱法对pn码周期进行估计研究,针对长pn码调制提出了一种基于延时相乘的二次功率谱法的新方法,给出了算法推导和理论仿真。
• Theory simulation results show that the methods mentioned are feasible to detect and estimate the short pn sequence modulation ds signals whose pn sequence length is 63 to 1023 . the delay and multiply approach can be used to estimate the chip rate of long pn sequence modulation ds signals , and the improved algorithm of it is available in lower input snr . the performance of the
  延时相乘法对长pn码调制信号pn码速率估计也适用,其改进法的信噪比容限比改进前降低;二次功率谱法和倒谱法对短pn码调制有很好的检测和估计性能,但对长pn码调制不适用,而基于延时相乘的二次功率谱法可以很好的估计出长pn码调制信号的pn码周期。
• Although the long pn sequence modulation has been used widely in the military communication with the good secrecy performance and restraint of jam between symbols , there is scarcely any research of long pn sequence modulation signals . so it is significant to research the estimation of long pn sequence modulation signals
  由于目前尚未有对长pn码调制信号进行检测和参数估计的研究,而长码调制较好的保密性能以及抑制部分符号间干扰的优点,使其在军事通信中有着较好的应用前景,因而此部分工作具有重要的意义。