Xem 1-20 trên 41 kết quả Phase modulation
  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: An Analysis of ISAR Image Distortion Based on the Phase Modulation Effect

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  • From the principles of electrical engineering it is known that the 3-phase quantities of the 3-phase AC machines can be summarized to complex vectors. These vectors can be represented in Cartesian coordinate systems, which are particularly chosen to suitable render the physical relations of the machines. These are the field-orientated coordinate system for the 3- phase AC drive technology or the grid voltage orientated coordinate system for generator systems.

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  • This paper reports experimental results of a radar system design. In the radar transmitter, a 13-bit Barker code with bit duration 3.24 µs and various other codes are generated by the microcontroller PIC16F877A. This code is then used to modulate IF 10.3 MHz to become BPSK signal. A stable local oscillator is also designed by PLL, VCO, and PIC16F877A. The operation frequency range of the oscillator is from 800 MHz to 900

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  • Lecture "Radio Communication Circuits: Chapter 7&8" presents the following contents: Analog Modulation Circuits (Amplitude Modulation, Frequency Modulation, Phase Modulation), Digital Modulation Circuits (ASK, FSK, PSK, QPSK, M-ary PSK DPSK, M-ary QAM). Invite you to consult.

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  • Frequency Modulation FM results when the time derivative of the phase of the carrier is varied linearly with the message signal m(t). The frequency deviation is proportional to the derivative of the phase deviation. Thus, the instantaneous frequency of the output of the FM modulator is maximum when the message signal m(t) is maximum and minimum when m(t) is minimum. Carson’s Rule: Carson’s Rule is used to determine the bandwidth of the FM wave. According to Carson’s Rule, the bandwidth is given by:...

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  • The second phase of the MSF Design Process is logical design. Logical design begins after conceptual design has started, when the project team agrees that there is sufficient information to begin the logical design. A good logical design depends greatly on a good conceptual design. Microsoft Official Curriculum (MOC), available to IT Academies at a discounted price, is professional courseware intended for IT professionals and developers who build, support, and implement solutions by using Microsoft products and technologies.

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  • This module provides students with an introduction to the Microsoft Solutions Framework (MSF) Process Model, including an overview of process models (waterfall and spiral); a discussion of the MSF milestone-driven and phase- based process model; the underlying principles of the MSF model, including living documents, versioned releases, and project tradeoffs, and a synopsis of how the Process Model can be applied to other types of projects, such as enterprise architecture (EA), application development (AD), and infrastructure deployment (ID). ...

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  • QUADRATURE AMPLITUDE MODULATION(QAM) QAM là dạng điều chế số mà thông tin được chứa cả trong biên độ và pha của sóng mang được truyền. .EIGHT QAM (8-QAM) • Dạng mã hóa M-ary với M = 8 (symbols), N = 3 (bits) • Có 4 pha ngõ ra với 2 biên độ (không giống 8-PSK, 8 pha với cùng biên độ) • Dữ liệu nhị phân ngõ vào được nhóm thành group 3 bit gọi là TRIBITS • TRIBIT code: 000 = PHASE 1 & AMPLITUDE 1 001 = PHASE 1 & AMPLITUDE 2 010 = PHASE 2 & AMPLITUDE 1...

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  • You have already learned that there are three phases of design ó conceptual, logical, and physical ó in the MicrosoftÆ Solutions Framework (MSF) Process Model. The first phase of the MSF Process Model is conceptual design. Conceptual design starts during the Envisioning Phase of the MSF Process Model, and continues through most of the Planning Phase. Since the MSF Design Process is an evolutionary, as well as iterative, process, conceptual design clearly sets the tone for both logical and physical design.

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  • The discrete wavelet transform (DWT) algorithms have a firm position in processing of signals in several areas of research and industry. As DWT provides both octavescale frequency and spatial timing of the analyzed signal, it is constantly used to solve and treat more and more advanced problems. The DWT algorithms were initially based on the compactly supported conjugate quadrature filters (CQFs). However, a drawback in CQFs is due to the nonlinear phase effects such as spatial dislocations in multi-scale analysis.

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  • At the end of this module, you will be able to: Explain design processes as they pertain to business solutions and datacentric solutions. Explain the concepts and benefits of services-based design. Identify phases in the project life cycle. This module provides a high-level overview of the MSF Process Model, the MSF Design Process Model, and the MSF Application Model. The courses in the MSF curriculum cover these topics in greater detail. For more information about the MSF curriculum, see http://www.microsoft.com/msf/....

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  • Power Electronics is the technology associated with efficient conversion, control and conditioning of electric power from its available input into the desired electrical output form. The field of the book is concerned of electrical power processing using electronic devices the key component of which is a switching power converter.

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  • The Planning Phase of the MSF Process Model culminates in the Project Plan Complete Milestone. One of the primary deliverables of this milestone is the functional specification. The functional specification describes the solution in sufficient detail for the development team to implement it. Microsoft Official Curriculum (MOC), available to IT Academies at a discounted price, is professional courseware intended for IT professionals and developers who build, support, and implement solutions by using Microsoft products and technologies.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A randomized phase II trial of mitoxantrone, estramustine and vinorelbine or bcl-2 modulation with 13-cis retinoic acid, interferon and paclitaxel in patients with metastatic castrate-resistant prostate cancer: ECOG 3899

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  • Upon completion of this module, you will be able to: Describe how to achieve a shared vision for the project team. Describe the scope and how to set it. Describe how to set the vision/scope for the solution. Understand the roles and responsibilities of each team member leading to vision/scope approval. Create the deliverables produced during the envisioning phase. Write the vision/scope document.

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  • At the end of this module, you will be able to define and understand the infrastructure development process and what it takes to prepare for deployment of a wide variety of technologies. Specifically, this module presents concepts and processes necessary to take the vision, functional specification, and plans from previous milestones and develop what is necessary for the deploying phase ahead.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Two-way relaying using constant envelope modulation and phase-superposition-phase-forward

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  • In electronics and telecommunications, modulation is the process of varying one or more properties of a high-frequency periodic waveform, called the carrier signal, with a modulating signal which typically contains information to be transmitted. This is done in a similar fashion to a musician modulating a tone (a periodic waveform) from a musical instrument by varying its volume, timing and pitch. The three key parameters of a periodic waveform are its amplitude ("volume"), its phase ("timing") and its frequency ("pitch").

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  • One of the major advances of science in the 20th century was the discovery of a mathematical formulation of quantum mechanics by Heisenberg in 1925 [94].1 From a mathematical point of view, this transition from classical mechanics to quantum mechanics amounts to, among other things, passing from the commutative algebra of classical observables to the noncommutative algebra of quantum mechanical observables. To understand this better we recall that in classical mechanics an observable of a system (e.g. energy, position, momentum, etc.

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  • Module H - Computer crime and digital forensics. This chapter define computer crime and list three types of computer crime that can be perpetrated from inside and three from outside the organization, identify the seven types of hackers and explain what motivates each group, define digital forensics and describe the two phases of a forensic investigation, describe what is meant by anti-forensics and give an example of each of the three types,...

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