Analysis on transmission characteristics of differential phase shift keying signal of continuous pressure wave in drilling fluid channel

Double Baseband Processing Offset Quadrature Phase Shift Keying Modulation Technique

两次基带处理&偏移正交相移键控调制技术

Digital Image Watermarking Algorithm Based on Phase Shift Keying

一种相移键控数字图像水印算法

Underwater Acoustic Data Transmission Based on Differential Phase Shift Keying

基于差分相移键控的水声数据传输技术研究

The effect of monomer ratio, the kind and concentration of keying agent on adhesion strength is also studied.

研究了单体配比、增粘剂种类、增粘剂用量对剥离强度的影响。

A method to identify the modulation levels of M-ary Quadrature Amplitude Modulation ( M-QAM) and M-ary Amplitude shift keying ( M-ASK) was developed to rapidly and automatically identify the modulation levels of digitally modulated signals at low signal-to-noise ratios ( SNR).

为了快速自动识别低信噪比下的数字幅度调制进制，提出了一种识别M进制正交幅度调制（M-QAM）和M进制幅度键控（M-ASK）的调制进制的方法。

Punctured convolutional coding with an 8, 16 and 32 differential amplitude and phase shift keying ( DAPSK) modulation is considered.

研究带删除卷积码的8、16、32差分幅/相移键控（DAPSK）调制。

Second, the paper analyzes the single-pulse modulation which includes pulse amplitude modulation, on-off keying modulation, pulse position modulation and two-phase modulation.

其次分析了单脉冲调制中的脉冲幅度调制、开关键控调制、脉冲位置调制和二相调制。

At present, many researches about all-optical wavelength converters only based on the signal modulation formats of binary amplitude shift keying ( OOK) and differential phase shift keying ( DPSK), but it is very few to the signal modulation format of polarization shift keying ( PolSK).

目前，全光波长转换器的研究主要集中在二进制振幅键控（OOK）和差分移相键控（DPSK）信号调制格式，对于偏振移位键控（PolSK）信号调制格式全光波长转换的研究很少。

Thirdly, we quantify the power penalty caused by the PMD in optical subcarrier multiplexing ( OSCM) system with amplitude shift keying ( ASK) and binary phase shift keying ( BPSK).

第三，对采用不同调制格式（包括幅移键控和二进制相移键控）的光副载波复用（OSCM）系统中，PMD引起的功率代价进行了量化。

The Binary phase shift keying ( BPSK) and Mary amplitude shift keying ( MASK) are widely used in radar systems, their elliptic covariance do not equal zero, are noncircular signals.

二进制相移键控（BPSK）和幅度调制（MASK）等信号是雷达系统中常用的信号，这种调制信号的椭圆协方差矩阵不为零，被称为非圆信号。

This is called "amplitude shift keying".

这就是所谓的“振幅键控”。

All digital receiver of quadrature phase shift keying with large frequency shift correction

四相相移键控调制的抗大频偏的全数字接收机

In modern Sonar equipment the several signal operation modes are usually required, for instance, the keying single frequency signal operation mode, the keying frequency modulation signal operation mode and etc.

在现代声纳中常要求在一部声纳中同时具有几种信号工作方式的功能，例如单频脉冲信号工作方式、键控式调频信号工作方式等等。

The Design of High Stability Keying Frequency Modulation Oscillator

高稳定度键控调频信号发生器设计

A magic packet is data consisting of "FF FF FF FF FF FF" followed by16 repetitions of the listening network device's MAC address.

神奇的数据包组成的“法郎法郎法郎法郎法郎法郎”，接着16日重复的听网络设备的MAC地址。

Previous sorties in a 314 square kilometer ( 120 square mile) zone where a U.S. Navy listening device earlier picked up signals consistent with locator beacons on the aircraft's 'black box' flight recorders failed to find any trace of the plane.

早些时候美国海军一侦听设备疑似探测到客机“黑匣子”发出的位置信号，蓝鳍-21随即对附近314平方公里（120平方英里）的海域进行搜寻，但未找到飞机的任何迹象。

Outdoorsmen and bird watchers can tap into Mother Nature's secrets like never before and be thrilled at the sound quality of this ingenious listening device.

外面的人和鸟类观察者从未像现在这样领略到大自然的秘密，并对此巧妙的器音质激动不已。

Blogging is a communication tool, a marketing technique, a listening device, and a way to interact directly with customers one-to-one on a global scale.

博客是交流工具，市场手段，倾听渠道和在世界范围内和顾客一对一直接互动的方法。

Now you can eavesdrop from a safe distance with the Orbitor Electronic Listening Device.

现在你可以用这个电子装置在一个安全的距离。

The spy staged a break-in to plant a listening device.

（间谍破门而入，安装窃听装置。）