We analyze the theory of their samplings, and make a brief introduction of SPOT-5 satellite which uses supermode sampling.

Supermode depression was realized by introducing additive pulse limiting effect using self phase modulation induced spectral spreading in dispersion shifted fiber and spectral bandpass filtering simultaneously. Supermode noise can be depressed enough when the pump power was 50 mW.

利用自相位调制+频谱滤波抑制超模噪音，实验中当抽运功率在50mW以上时就足可以抑制超模噪音。

The conclusion was verified by simulation signals with different noise intensity and rolling bearing's defect vibration signal. Analysis shows that the proposed method is more effective than direct modulation or time delayed autocorrelation demodulation in denoising or clarifying modulation information.

不同噪声强度仿真数据和滚动轴承故障振动信号实验数据分析表明，该方法比直接解调或仅采用时延相关解调更能有效抑制噪声，凸现信号调制信息。

With the progress of science and technology, laser interferometry technology develops to higher accuracy and greater dynamic range. At the same time, the demodulation technology is demanded higher and higher.

随着科学技术的进步，激光干涉测量技术向着更高的精度和更大的动态范围方向发展，对其解调技术的要求也越来越高。

Research on the method of real time digital demodulation for the FSK signal

FSK信号数字化实时解调方法

This paper introduces the concept of the HF multitone parallel signal and the technical standard of the 39 tone parallel signal, describes the principle of the 39 tone parallel signal and presents a way to realize the real time demodulation with the TMS320C30/ C31.

本文介绍了短波多音并行信号的概念及39音并行信号的技术规格，论述解调39音并行信号的原理，给出一种用TMS320C30/C31实时解调的实现方法。

Thus, the design and implementation of real time demodulation algorithm of QAM signals are of significant theoretical and practical importance.

深入研究QAM信号的解调算法，对于QAM信号解调的软硬件实现，有非常重要的理论和现实意义。

Algorithm Design of Real Time Demodulation for Shortwave QAM Signals

短波QAM信号实时解调算法设计

Inverted Differential Grating Demodulation System of Laser Doppler

倒置差动式激光多普勒光栅检波系统

To fit the needs of burst communication systems, one-bit and two-bit differential demodulation methods are studied in the thesis and realizes GMSK modulation and demodulation process using the former. A comparison is made to see the performance differences of the two methods using MATLAB.

针对突发通信系统需要，对1bit差分解调和2bit差分解调技术进行了研究，在MATLAB中用1bit差分解调技术实现了GMSK信号的调制解调，并对两种解调的性能进行了仿真对比。

This paper advances an implement scheme of the PAM-UWB system. The scheme adopts the synchronization algorithm which combines the TDT algorithm and slipping correlation, and the differential demodulation method for information recovery.

本文提出了一种PAM-UWB系统的实现方案，该方案采用TDT同步算法与滑动相关相结合的同步算法，在同步实现后采用差分解调实现信息恢复。

The simulation results show that the performance improvement of proposed algorithm is superior to conventional differential demodulation by 1.4 dB at a BER of 10-4 in AWGN channel.

仿真表明，相对于软判决译码时传统的差分解调，该算法在误比特率BER为10-4时在AWGN信道中有1.4dB的性能改善，在Rician信道中同样有显著的性能改善。

Thirdly, for differential demodulation, two kinds of timing algorithm and improvements in application are proposed, joint synchronization algorithm and statistical algorithm.

再次，针对差分解调提出了两种定时算法，联合同步法和统计法。

Design of digital filter is an important part in signal processing. The band-pass, low-pass and delay filters are involved in differential demodulation.

数字滤波器的设计是信号处理中非常重要的环节，在差分解调中涉及到带通、低通和延时滤波器的设计。

The paper proposes the application of nonredundant error correction in differential demodulation combined with soft-decision decoding.

提出了结合软判决译码的非冗余纠错（nonredundant error correction）在差分解调中的应用。

We need delivered price for less than $ 0.10 which means your price is way to high.

我们要求含运费价格低于0.10美元,也就是说你们的价格太高.

Therefore, the effect on the breeding and resource enhancement of demersal fishes brought by freshwater snail cannot be ignored.

因此，螺类对产粘性卵的鱼类的繁殖和资源增殖所带来的影响不容忽视。

The pattern of probability distribution on the density of demersal fishes stock in the northern continental shelf of the South China Sea

南海北部大陆架底层鱼类资源密度概率分布型的研究

Essential characteristics and their seasonal variations of community structure of demersal fishes in the Xiamen Harbour

厦门港湾底栖鱼类群落结构的基本特征及其季节差异

The dietary overlap coefficient and food resources of enhancement species among demersal fishes in Bohai Sea

渤海重要底层鱼类食物重叠系数与鱼类增殖

The culture species of freshwater fisheries in China are most midwater and demersal fishes caught by traditional fishing gears and drug.

目前我国淡水水域的养殖对象大多为中、底层鱼类，仍主要采用传统渔具捕捞。