%========================開始提取加噪信號的各類特征值================================ for n=1:1:50; m=n*Ns; x=(n-1)*Ns; for i=x+1:m; %提取加噪信號'signal_with_noise=y+noise'的前256個元素，抽取50次 y0(i)=signal_with_noise(i); end Y=fft(y0); %對調制信號進行快速傅里葉算法（離散） y1=hilbert(y0) ; %調制信號實部的解析式 Factor=0; %開始求零中心歸一化瞬時幅度譜密度的最大值gamma_max for i=x+1:m; Factor=Factor+y0(i); end ms=Factor/(m-x); an_i=y0./ms; acn_i=an_i-1; end gamma_max=max(fft(acn_i.*acn_i))/Ns
上傳時間： 2020-04-07
上傳用戶：如拷貝般復制
%========================開始提取加噪信號的各類特征值================================ for n=1:1:50; m=n*Ns; x=(n-1)*Ns; for i=x+1:m; %提取加噪信號'signal_with_noise=y+noise'的前256個元素，抽取50次 y0(i)=signal_with_noise(i); end Y=fft(y0); %對調制信號進行快速傅里葉算法（離散） y1=hilbert(y0) ; %調制信號實部的解析式 Factor=0; %開始求零中心歸一化瞬時幅度譜密度的最大值gamma_max for i=x+1:m; Factor=Factor+y0(i); end ms=Factor/(m-x); an_i=y0./ms; acn_i=an_i-1; end gamma_max=max(fft(acn_i.*acn_i))/Ns
上傳時間： 2020-04-07
上傳用戶：如拷貝般復制
The capability of radio waves to provide almost instantaneous distant communications without interconnecting wires was a major Factor in the explosive growth of communica- tions during the 20th century. With the dawn of the 21st century, the future for communi- cations systems seems limitless. The invention of the vacuum tube made radio a practical and affordable communications medium.
上傳時間： 2020-05-26
上傳用戶：shancjb
The continued reduction of integrated circuit feature sizes and commensurate improvements in device performance are fueling the progress to higher functionality and new application areas. For example, over the last 15 years, the performance of microprocessors has increased 1000 times. Analog circuit performance has also improved, albeit at a slower pace. For example, over the same period the speed/resolution figure-of-merit of analog-to-digital converters improved by only a Factor 10.
標簽： Digitally Assisted Pipeline ADCs
上傳時間： 2020-05-27
上傳用戶：shancjb
At the macroscopic level of system layout, the most important issue is path loss. In the older mobile radio systems that are limited by receiver noise, path loss determines SNR and the maximum coverage area. In cellular systems, where the limiting Factor is cochannel interference, path loss determines the degree to which transmitters in different cells interfere with each other, and therefore the minimum separation before channels can be reused.
標簽： Characteristics Channel Mobile
上傳時間： 2020-05-30
上傳用戶：shancjb
Soon after Samuel Morse’s telegraphing device led to a deployed electri- cal telecommunications system in 1843, waiting lines began to form by those wanting to use the system. At this writing queueing is still a significant Factor in designing and operating communications services, whether they are provided over the Internet or by other means, such as circuit switched networks.
標簽： Telecommunication Queueing Packet Theory with
上傳時間： 2020-05-31
上傳用戶：shancjb
The need to develop reliable microelectronic devices capable of operating at high speeds with complex functionality requires a better understanding of the Factors that govern the thermal performance of electronics. With an increased demand on system reliability and performance combined with miniaturization of the devices, thermal consideration has become a crucial Factor in the design of elec- tronic packages, from chip to system levels.
標簽： Telecommunications Management Equipment Thermal of
上傳時間： 2020-06-01
上傳用戶：shancjb
Electrostatic discharge (ESD) events can have serious detrimental effects on the manufacture and performance of microelectronic devices, the systems that contain them, and the manufacturing facilities used to produce them. Submicron device technologies, high system operating speeds, and Factory automation are making ESD control programs a critical Factor in the quality and reliability of ESD-sensitive products.
標簽： Management Program ESD
上傳時間： 2020-06-05
上傳用戶：shancjb
ESD is a crucial Factor for integrated circuits and influences their quality and reliability. Today increasingly sensitive processes with deep sub micron structures are developed. The integration of more and more functionality on a single chip and saving of chip area is required. Integrated circuits become more susceptible to ESD/EOS related damages. However, the requirements on ESD robustness especially for automotive applications are increasing. ESD failures are very often the reason for redesigns. Much research has been conducted by semiconductor manufacturers on ESD robust design.
標簽： Guidelines Design Basic ESD
上傳時間： 2020-06-05
上傳用戶：shancjb
In the present era, low observability is one of the critical requirements in aerospace sector, especially related to defense. The stealth technology essentially relates to shaping and usage of radar absorbing materials (RAM) or radar absorbing struc- tures (RAS). The performance of such radar cross section (RCS) reduction tech- niques is limited by the bandwidth constraints, payload requirements, and other structural issues. Moreover, with advancement of materials science, the structure geometry no longer remains key decisive Factor toward stealth.
標簽： Fundamentals Design Radar of EM
上傳時間： 2020-06-06
上傳用戶：shancjb
