The key parameter which describes the spatial resolution of imaging spectrum system is the modulation transfer function (MTF), it is an old and difficult topic to measure the MTF.
描述成像光谱仪系统空间分辩率优劣的关键参数是系统的调制传递函数—MTF, MTF的检测是一个古老而又困难的课题。
The paper uses MATLAB to simulate ASK, FSK, PSK modulation of digital signal and spectrum analysis.
运用MATLAB语言模拟实现了数字信号的ASK、FSK、PSK调制与频谱分析。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
By simulating the modulation process using MATLAB, the influence of different power spectrum estimation algorithm to the bit-error-rate performance of the demodulation technique is analyzed.
通过Matlab仿真了调制解调过程，分析了三种功率谱估计算法对解调误码性能的影响。
GMSK modulation technology is used to improve spectrum utilization and communication quality.
利用GMSK调制技术提高了频谱利用率和通信质量。
A new spectrum shaping method, based on electro-optic modulation, to alleviate gain narrowing in chirped pulse amplification (CPA) system, is described and numerically simulated.
提出了一种新型的基于电光调制的激光光谱整形方案，该整形技术可以减轻啁啾脉冲放大系统中的增益窄化效应。
According to frequency spectrum transfer characteristic of modulation and demodulation, we think the position measurement noise is Gaussian narrowband noise.
根据调制解调的频谱转移特性，提出了有效位移噪声是高斯窄带噪声。
It spurs us to develop highly efficient coding, modulation and signal processing techniques to improve the wireless frequency spectrum efficiency.
这种挑战使得人们努力开发高效的编码、调制以及信号处理技术来提高无线频率的效率。
Merits of the Linear FM are that it is not necessary to have an equalizer or the spread spectrum code modulation.
线性调频调制的优点是：不须在接收端添加均衡滤波器，也不须进行扩频编码。
It is emphasized how to select the spread spectrum access code, and how to realize synchronization and modulation etc.
着重介绍了扩频地址码的选择及实现、同步方式和解调方法等。
Adaptive computer control is used to mitigate the nonideal features inherent in the optical source and in the spectrum modulation process.
自适应计算机控制用于减轻在光源和频谱调制过程中固有的非理想特性。
The digital part is responsible for combining digital signal processor DSP with ADC to realize frequency spectrum remove, which is to realize the function of modulation and demodulation.
数字部分为数字信号处理器DS P结合adc实现信号的频谱搬移，达到调制解调功能。
This function is used to forward link IS-95 system simulation, including the spread spectrum modulation, matched filter, RAKE receiver, and other related communication module.
此函数用于IS-95前向链路系统的仿真，包括扩频调制，匹配滤波，RAKE接收等相关通信模块。
The impact of the inverse placement of spectrum for signals with different modulation modes is analyzed, then the method to invert radio signal spectrum is given.
分析了频谱倒置对不同信号调制方式的影响；给出了实现无线电频谱倒置的算法；以多速率数字信号处理理论为基础给出了具有低计算复杂度的实现方案。
The impact of the inverse placement of spectrum for signals with different modulation modes is analyzed, then the method to invert radio signal spectrum is given.
分析了频谱倒置对不同信号调制方式的影响；给出了实现无线电频谱倒置的算法；以多速率数字信号处理理论为基础给出了具有低计算复杂度的实现方案。
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