1) coherent demodulation
相干解调
1.
Carrier recovery is the key technology for coherent demodulation receiver in RF communication,and carrier recovery algorithm directly determiner the performance of the receiver.
载波恢复技术是无线电射频(RF)通信中相干解调接收机不可缺少的关键技术之一。
2.
Taking the modulated signal,one of the typical narrow-band random processes,as an example,this paper simulates the whole process of speech communication in the white Gauss noise background,and compares the quality of speech signal taking coherent demodulation method with the one taking envelope demodulation method.
本文以调制信号这种典型的窄带随机过程为例,利用Simulink仿真软件模拟了语音通信的全过程,并在调制信号被高斯白噪声污染的情况下比较了相干解调与包络解调的信号质量。
2) Non-coherent demodulation
非相干解调
1.
Using the multi-symbol differential in CPM non-coherent demodulation,it can decrease the complexity and accelerate the .
在CPM非相干解调中考虑多符号差分相关,能够将复杂理论向实际应用简化,以最小的性能代价换取系统复杂度的降低和解调速度的提高,易于在各种硬件平台上以软件无线电格式实现,有一定的理论和实用价值。
3) non-coherent detection
非相干解调
1.
This paper presented an improved return map based approach of hybrid differential chaos shift keying (DCSK), which combines conventional DCSK with the return map based non-coherent detection chaos shift keying (CSK).
将基于回归映射的非相干解调的混沌键控(CSK)与现有的差分混沌键控(DCSK)相结合,提出一种改进的基于回归映射的H-DCSK通信方案。
4) noncoherent demodulation
非相干解调
1.
The comparison between the detection of zero, the max of frequency spectrum and the algorithm of noncoherent demodulation reveals that the algorithm of noncoherent demodulation is qualified in the probability of errors.
通过对过零检测、FFT频谱幅值法和非相干解调算法的比较,可以看出采用非相干解调方法具有较好的误码特性。
5) MSK coherent demodulation
MSK相干解调
1.
Related problems, such as quick capture of direct spread sequence, MSK coherent demodulation, are also involved.
讨论了存在强干扰条件下MSK中频数字接收机的频域窄带干扰抑制、伪码快速捕获、MSK相干解调等实现方法。
6) incoherent detection
不相干解调
补充资料：相干散射和非相干散射
再辐射的光量子频率和被吸收的光量子频率准确相等的散射过程称为相干散射。在相干散射的情况下，源函数准确地等于平均辐射强度。再辐射的光量子频率和被吸收的光量子频率不相等的散射过程称为非相干散射。在天体物理中，存在一系列因素使散射过程成为非相干散射。主要的因素是：原子的能级有一定的宽度、原子的热运动和湍动以及压力效应等。对于非相干散射，源函数是相当复杂的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条