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- amplitude and phase keying 振幅与相位键控
- This shows that the amplitude and phase error has important effect on ASLC. 理论分析和仿真结果表明幅相误差对自适应旁瓣对消系统具有重要的影响,必须加以克服。
- To the calibration of indentity of amplitude and phase in mono-pulse radar, this paper describes the principle, arithmetic and realization method, analyzes the key process of automated calibration and the key problem of software design. 摘要针对单脉冲测量雷达中的系统幅相一致性补偿问题,给出了幅相一致性标定自动化标定的原理、算法和软件实现方法,分析了自动标定过程中的关键过程和软件设计时主要问题。
- The key component of the system is a digital intermediate frequency receiver employing DSP and FPGA to obtain amplitude and phase data in real-time, which improves measurement speed and flexibility. 该系统的关键部件是一个数字中频接收机,利用DSP和FPGA实时获取幅度和相位数据,从而提高了测量速度和灵活性。
- APSK Amplitude and Phase Shift Keying 振幅移相键控
- Carrierless Amplitude and Phase Modulation has emerged as the de facto standard, having captured most of the nascent market to date. 无载波振幅和相位调制正在成为事实上的标准,迄今已占了这个新生市场的大部分。
- Frequency is swept to rapidly obtain amplitude and phase information over a band of frequencies of interest. 频率是席卷迅速获得振幅和相位信息超过波段的频率的利益。
- First, a high velocity increases the mass of an electron, which affects the amplitude and phase of its oscillations. 首先,高速会使电子质量增加,从而改变它振动的振幅与相位。
- While homomorphic processing can also be used to calculate attenuation, amplitude and phase of one mode simultaneously. 同态处理方法还可以同时估计单一波模式的衰减、幅度和初相位;
- Carrierless Amplitude and Phase Modulation has emerged as the de facto standard,having captured most of the nascent market to date. 无载波振幅和相位调制正在成为事实上的标准,迄今已占了这个新生市场的大部分。
- Both the amplitude and phase optical modulation characteristics of Epson liquid crystal television are studied using the optical measures. 采用光学干涉法和透射法分别测试了爱普生 Epson 液晶电视 L CTV 的位相和振幅调制特性 ;
- Ionospheric scintillations are rapid variations in the amplitude and phase of radio signals resulting from density irregularities in the ionosphere. 摘要电波穿越电离层时,由于受到电离层不均匀结构的影响,电波的幅度、相位、时延等有时会发生快速抖动,这就是所谓的电磁波电离层闪烁现象。
- To learn about the amplitude and phase features of GPR reflected wave from frozen soil boundary, forward modeling was also developed. 通过正演模型试验了解了冻土边界的雷达反射波波形、振幅及相位特征;
- Conversion of an LVDT's output signals' amplitude and phase into a form compatible with a microcontroller's internal ADC usually requires additional external circuitry. LVDT输出信号的波幅与相位转换成与微控制器内部ADC兼容的形式,一般需要添加外部电路。
- This paper clarifies the theory of I/Q modulation, elaborates EVM and ACPL, and analyzes the effect of amplitude and phase imbalance and DC offset on EVM. 在阐述I/Q正交调制基本原理的基础上,通过对误差矢量和邻近信道功率泄漏的详细分析,定性、定量地讨论了各种非理想电路因素(如相位不平衡、幅度不平衡、直流偏差等)对调制器性能的影响。
- The former one is now widely used in the monopulse system to calibrate the amplitude and phase imbalances between the sum and difference channels by injecting test signals. 离线校正的方法是现阶段单脉冲雷达系统进行和差通道幅相校正采用的主要方法,它通过注入测试信号的方法来得到对误差接收通道幅相特性的估计。
- After deducting the effect on NSR caused by the quantization process in both amplitude and phase, we elucidate the actual methods of NCO in an FPGA and give the simulating result. 最后,给出了NCO在FPGA中的具体实现方案和仿真结果。
- Time-varying signal model, whose frequency, amplitude and phase are time-varying based on the random walk model, is in more accord with the real Coriolis Mass Flowmeter signal. 频率、幅度和相位均按随机游动模型变化的时变信号模型,能更为真实地描述科氏流量计信号的实际特性。
- Therefore hydrophone output contains random perturbations both in amplitude and phase, which affect the beam pattern and array gain in MVDR based beamforming. 在作MVDR自适应波束形成时,该随机误差的存在将影响到基阵的阵增益,降低检测能力。
- Because of the difference in amplitude and phase between channels,the cancellation performance will usually degrade greatly in adaptive sidelobe cancellation(ASLC) system. 制导雷达中若使用常规自适应旁瓣对消方法,辅助天线中的期望信号会引起测角误差。