The analysis of simulation waveform indicates that the programme achieves QPSK modulation and demodulation functions well.

1、

This article mainly deals with the design of QPSK modulation and demodulation circuit.

本文主要阐述的是QPSK调制与解调电路的设计.

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2、

MATLAB QPSK signal generation, and through Ruili Channel and AWGN channel simulation.

用MATLAB生成QPSK信号, 并通过瑞丽信道和AWGN信道的仿真.

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3、

Model of QPSK modulation code integrity, and can be used directly.

QPSK调制模式的源代码的完整性, 并可以直接使用.

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4、

This m file performs the QPSK transmission and reception.

这米文件执行的QPSK传输和接收.

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5、

And it's definitely equipped to do so-the Meitu M8" s front-facing camera is a 12-megapixel Sony camera, with a 21-megapixel Sony rear-facing camera. It also has a 5.2-inch display, 4GB of RAM, a Helio X20 processor, and a 3000mAh battery.

美图M8配置有索尼前置1200万像素摄像头，以及索尼后置2100万像素摄像头，5.2寸屏幕，内存4G，采用Helio X20处理器，以及3000毫安电池。

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6、

Initial mockups of the introspection engine show a small, monochromatic display built into its casing shows whether the phone is "dark," or whether it is transmitting, and it also can supply an iPhone with extra battery power and cover the rear-facing camera.

反监听装置的初始模型是植入手机保护套的一个小小的单色显示器，它能够显示手机是否被“黑”，或是否在传送信息，它还可以为苹果手机提供额外的电力，并盖住苹果手机的后置摄像头。

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7、

Both iPad Mini and new Nexus 7 cameras have the same megapixel counts: 5 megapixels on the rear-facing camera and 1.2 megapixels on the front-facing one.

像素也和iPad Mini相同：500万像素后置摄像头和120万像素的前置摄像头。

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8、

Most of the improvements in the latest version had been expected, including front and rear-facing video, which allows video conferencing between iPads, Mac computers and the most recent iPhones and iPods.

最新版本的改进大多在意料之中，包括前后两个摄像头，可以用于在iPad、Mac电脑和最新版的iPhone和iPod之间进行视频会议。

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9、

The Nexus 7 also caught up to the iPad Mini in cameras: It now has a built-in rear-facing camera, unlike its predecessor, which only had a front-facing one.

Nexus7摄像功能和iPad Mini相当：它的上一代只有前置摄像头，而新款则配备了一枚后置摄像头。

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10、

Actually, that is not quite true: if it were, our seats would be rear-facing, like those in military aircraft, since they are safer in the event of an emergency landing.

实际上，这么说不完全对，因为要保证您的安全，我们的坐椅应该像战斗机一样，面朝后，这样紧急迫降时会更安全。

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11、

Other key Stats: 4.7-inch HD display; 8.0 megapixel rear-facing camera; 1080p video recording.

其他重要参数包括：4.7英寸高清显示屏，800万后置摄像头，1080P视频录制。

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12、

It will have front-and rear-facing cameras, perfect for both taking snapshots and video conferencing.

前后都配有摄像头，适用于拍照以及视频会议。

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13、

For forward and rear-facing children.

专为前向和后向孩子打造。

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14、

For one thing, they each had a hole in the back that could accommodate a rear-facing camera.

首先，这些保护套的后部有个洞，看起来应该与后置式摄像头相匹配。

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15、

The study of X-ray energy dispersive spectrometer for sulfur element dispersion of film thickness direction pointed out that thiokol rubber content increased step by step at the beginning of polymerization, and then it maintained a level.

X射线能量散射谱对复合膜厚度方向上聚硫橡胶的分布分析表明，氧化复合初期，复合膜中聚硫橡胶含量逐步增大，随后保持稳定。

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16、

In the process of preparing a new type rare earth frictional material, the influence of resin agglomerate, thiokol modified phenol-formaldehyde resin, contents on property of friction material was studied.

在制备的新型稀土摩阻材料中，研究了丁腈改性酚醛树脂粘结剂含量变化对材料性能的影响。

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17、

Insitu Electrochemical Copolymerization of Aniline and Thiokol Rubber

苯胺与聚硫橡胶原位电化学复合的性质

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18、

Fold-resistant highly electrical conductive polypyrrole/ thiokol rubber composite films

耐折高导电聚吡咯／聚硫橡胶复合膜

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19、

The Thiokol has been used in space-borne infrared optical systems and electron-electrical systems.

该胶已在航天产品的红外光学系统和电子电气系统中得到应用。

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20、

More environmental friendly synthetic technology for BDNPA/ F was recently developed by Thiokol corporation.

随着环保意识的提高，美国聚硫公司最近开发出了环境友好的BDNPA/F的合成工艺。

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