spectrum

only one permanent note. SoIn your eyes, the fallen leaves seem to change the impermanence of The World. Actually, it is just a piece of music that has already been written in the hearts of God. Sorry, this is not a chicken Article, but a definite formula on the blackboard: Fourier tells us that any periodic function can be considered as a superposition of sine waves of different amplitude and phases. In the first example, we can understand that you can combine any piece of music by tapping dif

hearts of God. Sorry, this is not a chicken Article, but a definite formula on the blackboard: Fourier tells us that any periodic function can be considered as a superposition of sine waves of different amplitude and phases. In the first example, we can understand that you can combine any piece of music by tapping different keys at different times. One of the methods that run through the time domain and frequency domain is the Fourier analysis in the text of the biography. Fourier analysis can

waveform relative to the axis of the overall upward or downward without changing the shape of the wave.Next, let's go back to junior high school, recall the eight commandments that have died, ah no, the dead teacher is how to define the sine wave bar. A sine wave is a projection of a circular motion in a straight line. So the basic unit of the frequency domain can also be understood as a circle that is always rotated. After introducing the basic elements of the frequency doma

projection of a circular motion in a straight line. So the basic unit of the frequency domain can also be understood as a circle that is always rotatedWant to see the picture of the classmate please poke here:File:fourier Series Square Wave Circles animation.gifAnd here:File:fourier Series Sawtooth Wave Circles animation.gifPoint out of the friends do not be turned off the wiki, Wiki wrote where the article is not moral integrity this is not.After introducing the basic elements of the frequency

this?This is the appearance of the rectangular wave in the frequency domain, is not completely recognized? Textbooks are usually given here and then left to the reader endless reverie, and endless spit groove, in fact, as long as the textbook to fill a picture is enough: frequency domain image, known as the spectrum, is--A little clearer:It can be found that in the spectrum, the amplitude of even-numbered

[Portal] [Automatic Speech Recognition Course] Lesson 1 Statistical Speech Recognition Address: http://blog.csdn.net/joey_su/article/details/36414877 Please indicate the source for reprinting. Please contact us. Overview ASR Speech Signal Analysis Features Spectrum Analysis Cepstrum Analysis Standard features: MFCC and PLP Analysis Dynamic Features At the end of the first lesson, we mentioned the block diagram of speech recognition, which sh

to fill a picture is enough: frequency domain image, known as the spectrum, is--A little clearer:It can be found that in the spectrum, the amplitude of even-numbered items is 0, which corresponds to the color line in the graph. Sine wave with an amplitude of 0.Moving diagram please poke:File:fourier Series and Transform.gifTo be honest, when I was studying the Fourier transform, this diagram of the wiki ha

fill a picture is enough: frequency domain image, known as the spectrum, is--A little clearer:It can be found that in the spectrum, the amplitude of even-numbered items is 0, which corresponds to the color line in the graph. Sine wave with an amplitude of 0.Moving diagram please poke:File:fourier Series and Transform.gifTo be honest, when I was studying the Fourier transform, this diagram of the wiki had n

are usually given here and then left to the reader endless reverie, and endless spit groove, in fact, as long as the textbook to fill a picture is enough: frequency domain image, known as the spectrum, is--A little clearer:It can be found that in the spectrum, the amplitude of even-numbered items is 0, which corresponds to the color line in the graph. Sine wave with an amplitude of 0.Moving diagram please

With the development of the communication network towards broadband and mobile, the optical fiber wireless communication system (ROF) integrates Optical Fiber Communication and wireless communication, giving full play to the advantages of broadband and anti-interference of optical fiber lines, at the same time, it makes full use of the convenient and flexible wireless communication to meet people's needs for broadband. Early ROF technology was designed to provide high-frequency wireless transmis

With the rapid development of wireless communication technology, spectrum resources, especially those under 3 GHz, become increasingly tense. Due to the emergence of Wireless LAN technology and wireless network technology, more and more people are using these technologies to connect to the Internet and telecommunication networks wirelessly. Most of these technologies use non-authorized frequency bands to make these frequencies saturated. However, some

During the course of study, this parameter is often used. Later I worked mainly on audio/speech codec, but the concept of cepstrum was rarely used. I saw these words when I read a paper today, I think it is very practical. Let's review this signal feature. Time-cepstrum analysis is very effective when extracting the signal characteristics transmitted by the carrier. Cepstrum is widely used in the extraction of Speech Recognition feature parameters. This is because the essence of speech is the

Summary Starting from the analysis of GSM spectrum efficiency, this paper analyzes the loss of spectrum efficiency of voice service after the GSM network is upgraded to GPRS, and the new data service access ability, and finally takes into account the maximum access ability of the integrated service under GSM current spectrum from the mutual substitution between

different Q values of the same bandwidth, while the filter group with constant Q is a wavelet analysis.Fourier transform (FT) is a form of transformation from time domain to frequency domain. It is widely used in acoustics, telecommunications, power systems, signal processing, and other fields. We hope to implement spectrum analysis or other work on the computer. The computer's requirement for signals is that both the time domain and frequency domain

filtering the signal using a filter group with different Q values of the same bandwidth, while the filter group with constant Q is a wavelet analysis.Fourier transform (FT) is a form of transformation from time domain to frequency domain. It is widely used in acoustics, telecommunications, power systems, signal processing, and other fields. We hope to implement spectrum analysis or other work on the computer. The computer's requirement for signals is

different Q values of the same bandwidth, while the filter group with constant Q is a wavelet analysis.Fourier transform (FT) is a form of transformation from time domain to frequency domain. It is widely used in acoustics, telecommunications, power systems, signal processing, and other fields. We hope to implement spectrum analysis or other work on the computer. The computer's requirement for signals is that both the time domain and frequency domain

FFT (Fast Fourier transformation) is a classic algorithm used for digital signal processing. Many people who have studied DSP or chip design know this algorithm. However, have you ever wondered why there are so many FFT operations in digital signal processing? Some may say that in order to analyze the signal spectrum. The problem below is to analyze the daily needs of the spectrum, such as mobile phone call

The features of the four wireless extended communication technologies are completely explained. First, let everyone understand the features of the wireless extended communication technology, and then fully introduce the features of the wireless extended communication technology. It does not matter. After reading this article, you will certainly have a lot of GAINS, I hope this article will teach you more things. The so-called spread-spectrum communica

The principle of PN Code synchronization in 1.CDMA system The transmitter and receiver adopt high accuracy and high stability clock frequency source to ensure the stability of frequency and phase. But in the practical application, there are many uncertain factors, such as the instability of sending and receiving clocks, uncertainty of launch time, transmission delay and interference, especially in mobile communication, these uncertainties are random, can not be compensated in advance and can on

1 Introduction More and more applications require sampling analog signals, converting them into digital signals, performing various calculations and processing on digital signals, and then converting them into analog signals. This article discusses how to sample analog signals and shaping them to preserve the original signal. 2 baseband signal sampling and mixing analysis Starting with the finite bandwidth signal, the finite bandwidth signal refers to the signal with a