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组合调制
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  hybrid modulation
     FSK/FM Hybrid Modulation/Demodulation Performance Analysis in an Automatic Vehicle Location System
     自动车辆定位系统中的FSK/FM组合调制解调特性分析
短句来源
     At the same time,based on conventional modulation strategies-multi-carrier SPWM applied on multilevel inverter,hybrid modulation strategies are introduced corresponding to hybrid structure.
     同时,基于传统的应用于多电平逆变器的多载波SPWM调制策略,提出了对应于组合拓扑结构的组合调制策略。
短句来源
  combine modulation
     (4) In order to realize the high precision timing in low frequency tune-code timing service system, the combine spread spectrum modulation based on ASK modulation and further the feasible combine modulation scheme are given. The design of correlation reception low frequency time-code receiver shows that using additional spread spectrum can realize the high precision timing up to microsecond.
     (4)为了实现低频时码授时系统的高精度定时,提出在ASK调制基础上组合扩频调制技术,给出了可行的组合调制方案,并就相关接收式低频时码接收机的设计进行了研究,研究结果表明,使用附加扩频调制,可实现微妙量级的定时精度。
短句来源
  combined modulation
     Performance Analysis of Time-frequency Combined Modulation Systems
     基于正交化的时频组合调制系统的性能分析
短句来源
     A Multi-user Combined modulation Adaptive Bit Allocation in OFDM System
     OFDM系统中多用户组合调制自适应比特分配算法
短句来源
     Algorithm Implementation of Self-Adaptive Combined Modulation and Bit Allocation in Multi-user OFDM System
     多用户OFDM自适应组合调制及比特分配算法的实现
短句来源
  “组合调制”译为未确定词的双语例句
     The main purpose is to study further in the constant envelope and Quasi-constant envelope modulations with high modulation efficiency.
     主要研究适合深空信道传输的具有恒定或准恒定包络的高效数字调制方式与直接序列扩频相结合的组合调制解调方式。
短句来源
     A Hybrid Radar Signal Characterized with LPI
     一种具有低截获特性的组合调制雷达信号
短句来源
     The simulation and experiment results prove the validity of hybrid topologies and corresponding modulation strategies, which lays the foundation of practical application of hybrid multilevel inverter structure.
     仿真及实验结果验证了组合拓扑结构及组合调制策略的有效性,为多电平逆变器组合拓扑结构的实际应用奠定了基础。
短句来源
     In this paper TG-FTIR was exploited to investigate the effect of existence of oxides, carbonates and oxides/carbonates mixture in the combustion on thermal stability of CaSO_4 at high temperature (1 000-1 450 ℃).
     本文利用氧化物系列和碳酸盐系列所实验出的较有效的添加剂组合调制模拟工业废弃物,采用TG-FT IR联用技术,在线测定了各种氧化物系列复合固硫剂和碳酸盐列复合固硫剂对固硫产物CaSO4在高温(1 000~1 450℃)热稳定性的影响规律.
短句来源
     The simulation results proved that the validity of hybrid structure and corresponding modulation strategies,it lays the foundation of practical application on hybrid multilevel inverter structure.
     仿真结果验证了组合拓扑结构及组合调制策略的有效性,为多电平逆变器组合拓扑结构的实际应用奠定了基础。
短句来源
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  hybrid modulation
In this section, we propose a hybrid modulation technique to embed and detect fingerprint code.
      
We then proposed a hybrid modulation technique that could handle the large size of fingerprint code.
      
  combined modulation
The performance characteristics of the developed highly coherent frequency-doubled Nd:YAlO3 laser with combined modulation of the cavityQ-factor by an acoustooptical shutter and a bleachable filter are presented.
      
The bilateral anterior portion of the BA22 (ant-BA22) and the left BA41/42 were more extensively activated by the combined modulation condition under the auditory cue than that under the visual cue.
      
Among the four auditory conditions with or without the two types of internal modulation, the activation in the ant-BA22 was augmented only on the left side by the combined modulation condition.
      
Reference equipment for certifying and testing frequency deviation meters as well as the FM parameters of combined modulation me
      
A genetic algorithm is used to optimize the combined modulation characteristics of two liquid crystal panels in a multiplicative architecture.
      
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In this paper, the performance of time-frequency combined modulation systems is analyzed by use of inner product space theory combined with statistical theory. The key step of the analysis process is to represent time-frequency modulation signals as perpendicular vectors each other. The analysis process for time-frequency modulation signals transmitted over the additive white Gaussian noise (AWGN) channel is given. And the computer simulation results for the time-frequency modulation systems are also given....

In this paper, the performance of time-frequency combined modulation systems is analyzed by use of inner product space theory combined with statistical theory. The key step of the analysis process is to represent time-frequency modulation signals as perpendicular vectors each other. The analysis process for time-frequency modulation signals transmitted over the additive white Gaussian noise (AWGN) channel is given. And the computer simulation results for the time-frequency modulation systems are also given. The computer simulation results show that the theoretical results are correct.

本文基于泛函分析中内积空间理论建立了信号空间,将时频信号表示成相互正交的矢量,然后对时频组合调制系统进行了性能分析。给出了在AWGN(加性白高斯噪声)信道和匹配子空间解调器的条件下,对四时四频系统进行性能分析的过程,分析的结果得到了计算机模拟试验的验证。文中最后也推广给出了M进制n时n频时频组合调制的误码率公式。

Resonator fiber optic gyro (R FOG) is an inertial rotation sensor with high accuracy which is based on the Sagnac effect. The signal detection system has important role in the R FOG. The detecting precision influences the maximum resolution of the gyro directly. The fiber ring resonator is the core sensing element in the R FOG. This paper presents the scheme to detect the resonance point using two frequency serrodyne modulation, and uses the Lorentzian function to describe the expression of the output power...

Resonator fiber optic gyro (R FOG) is an inertial rotation sensor with high accuracy which is based on the Sagnac effect. The signal detection system has important role in the R FOG. The detecting precision influences the maximum resolution of the gyro directly. The fiber ring resonator is the core sensing element in the R FOG. This paper presents the scheme to detect the resonance point using two frequency serrodyne modulation, and uses the Lorentzian function to describe the expression of the output power at the exit port of the fiber ring resonator taking the temporal coherence of the laser into account. According to near linear relationship between amplitude of the square waveform and the resonant frequency deviation near the resonant point, frequency feedback time after time is used for frequency tracking for both clockwise (CW) and counterclockwise (CCW) waves. Therefore, complex root finding process can be avoided. Simulation shows that both CW and CCW waves can be locked at the resonance frequency of the resonator quickly by frequency feedback operation.

谐振腔光纤陀螺 (R FOG)是利用光学Sagnac效应实现对转动检测的一种高精度的惯性传感器件。在谐振腔光纤陀螺系统中 ,信号检测系统占有非常重要的地位 ,其检测精度的大小直接影响陀螺的分辨率。光纤环形谐振腔是谐振腔光纤陀螺的核心敏感部件。采用两种频率的锯齿波组合调制 ,考虑激光器有限光谱线宽条件下 ,采用洛仑兹线型描写光纤环形谐振腔的输出光强表达式。针对输出光强与谐振频率偏差在靠近谐振点附近的近似线性关系 ,利用多次反馈频率操作来依次跟踪谐振腔光纤陀螺顺时针和逆时针光束的谐振点 ,从而避免了谐振频率偏差复杂的求根算法。仿真结果表明 ,多次反馈频率操作 ,可以较快地锁定到谐振点

This paper presents a method of combined pulse-series coding which is used to s uppress range ambiguity in Synthetic Aperture Radar (SAR).This method can suppre ss,in both range and azimuth,range ambiguity of back-scattered signals.Specia l ly,an azimuth phase shifting method is presented and used in this combined puls e -series coding method to suppress range ambiguity in azimuth.Azimuth phase shif ting method is based on the fact that back-scattered signals with range ambigui ty are generated by pulses of...

This paper presents a method of combined pulse-series coding which is used to s uppress range ambiguity in Synthetic Aperture Radar (SAR).This method can suppre ss,in both range and azimuth,range ambiguity of back-scattered signals.Specia l ly,an azimuth phase shifting method is presented and used in this combined puls e -series coding method to suppress range ambiguity in azimuth.Azimuth phase shif ting method is based on the fact that back-scattered signals with range ambigui ty are generated by pulses of different eradiating time.Following this method,s hift pulses by different phases firstly,and then reverse-shift the back-s cattered signals by one of these phases.Consequently,the Doppler history of bac k -scattered signals will be disturbed except the desired signal whose shifted ph ase is completely reverse-shifted.

针对合成孔径雷达(SyntheticApertureRadar,SAR)的距离模糊问题,本文提出组合调制脉冲序列的方法.特点是可以在距离向和方位向两维上对距离模糊进行抑制.其中,在方位向上需要使用本文给出的方位向相位调制法.由于产生距离模糊的回波一定是两个(或多个)在不同时刻发射出的脉冲的地面回波的叠加,可以在发射前对其分别进行不同的相移,然后从回波中修正前者的相移,而后者仍保留两个相移之差.这样就使后者多普勒历程被修改而前者不变.

 
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