dqpsk modulation

This article introduces a program of 51 series single-chip microcomputer that uses pulse width modulation (PWM) to control the brightness of LED lights. We all know that 51 Single-Chip Microcomputer itself has no pwm interface. This program is The software simulates pwm and adjusts the duty cycle of high voltage and low level in a certain frequency square wave to realize the brightness control of the LED lamp. In the program, the timer 0 is used to ge

wiring of ASICS. The clock available to the FPGA involves the problem of the global clock network. As this does not involve the problem of the artboard, for the clock network is not more than a repeat. How to use the phase-locked loop: First locate and open the Megawizard plug-in Manager in the Tools menu bar and follow the steps below to configure the use of the PLL IP coreThis IP core outputs up to 5 signals, since we only need one output C0, so C1 ~ C4 is set to default (not turn

Time stretching is the process of changing, the speed or duration of a audio signal without affecting its pitch. Pitch scaling or Pitch shifting is the opposite:the process of changing, the Pitch without affecting the speed. Similar methods can change speed, pitch, or both at once, in a time-varying the.These processes is used, for instance, to match the pitches and tempos of both pre-recorded clips for mixing when the clip s cannot be reperformed or resampled. (a drum track containing no pitche

Time stretching is the process of changing, the speed or duration of a audio signal without affecting its pitch. Pitch scaling or Pitch shifting is the opposite:the process of changing, the Pitch without affecting the speed. Similar methods can change speed, pitch, or both at once, in a time-varying the.These processes is used, for instance, to match the pitches and tempos of both pre-recorded clips for mixing when the clip s cannot be reperformed or resampled. (a drum track containing no pitche

This time, the main thing is to change the list of floating values to achieve the click Bounce effect, because is the click List of each Li can beat the entire list,So is the double for loop, the first one is to control the Click event, the second is to cycle change the flot value of each li.In addition, to change the click event after each click, a switch is required to control the effect of each click.After adding a little bit by JS to achieve the effect of pseudo-class.Note that the Style pro

How to disable dynamic frequency modulation of CPU 1. how to check whether the current OS enables the dynamic frequency modulation function www.2cto.com to execute in shell, check whether the clock speed of all cores is the maximum CPU clock speed: grep-E amp; #39; ^ modelname | ^ cpuMHz amp; #39;/proc/c... how to disable dynamic frequency modulation of CPU 1.

The baseband signal is the original electrical signal, which generally refers to the basic signal waveform. In digital communication modulation technology, it refers to the corresponding electrical pulse. In Wireless telemetry and remote control systems and radio technology, modulation is to use baseband signals to control parameters (amplitude, frequency, and phase) of high-frequency carriers so that these

Baseband signal modulation: The signal from the source is called baseband signal, such as: computer output of various text or image file data signal. Baseband signal contains low-frequency components, even DC components, the channel can not transmit this low-frequency components or DC components, so the baseband signal needs to be modulated. modulation method: 1. Baseband

Article Title: use of commercial server AIX resource monitoring and modulation tools. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Performance Optimization and determining the performance bottleneck in the system are one of the main tasks of the system administrator. In a computer system, CPU, memory, hard disk,

network topology structure. Each ADSL user has a separate telephone line connected to the ADSL terminal, the structure of which can be seen as a star structure, its data transmission bandwidth can be guaranteed and by each user exclusive. In addition, because of the use of ATM transmission technology, its data transmission has a certain degree of security and confidentiality.In 2001, ADSL as a broadband access technology has been widely used in the country, of which, Beijing Telecom has investe

1. Generate FM signal and draw frequency domain waveform%%generate FM signal and draw time domain waveform FM= -; %modulation signal frequency AM=0.5; %modulation signal Amplitude FC= 5e3; %Carrier Frequency AC=1; %Carrier Amplitude KF=10000*pi; %FM Sensitivity FS= 75e3; %Sample Rate N= the; %number of sample points T= (0: N-1)'/fs;% time Tm_t = Am*sin (2*PI*FM*T); %mod