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.

1、

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。

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2、

Algorithm Design of Real Time Demodulation for Shortwave QAM Signals

短波QAM信号实时解调算法设计

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3、

Inverted Differential Grating Demodulation System of Laser Doppler

倒置差动式激光多普勒光栅检波系统

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4、

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。

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5、

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。

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6、

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。

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7、

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。

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8、

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。

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9、

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。

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10、

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.

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11、

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。

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12、

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

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13、

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

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14、

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

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15、

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。

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16、

Theory of demand-pull inflation

需求拉动通货膨胀理论

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17、

The result indicate the causes of China technology markets growth is demand pull not technology push.

结果表明：中国技术市场规模扩张的类型属于需求拉动的规模扩张，而不属于技术推动的规模扩张。

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18、

Demand pull factors: Factors that attract migrants into another country.

需求拉动因素，吸引因素：指吸引移民到另一个国家去的因素。

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19、

Enhancement of China Innovation Capability: From Technological Diffusion to Demand Pull

中国技术创新能力提升：从技术扩散到需求引致

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20、

The motivation is demand pull and science and technology push;

需求拉力与科技推力是发展的动力；

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