he LPC932 can be used to create a Pulse Width modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
标签： signal modulated analog create
上传时间： 2015-05-14
上传用户：CHINA526
a program that generates a pulse-width modulated (PWM)signal.
标签： pulse-width generates modulated program
上传时间： 2015-08-15
上传用户：wfl_yy
Stack-based sequential decoder for M-QAM modulated MIMO-type problems, i.e., of fixed tree depth.
标签： Stack-based sequential MIMO-type modulated
上传时间： 2014-01-25
上传用户：515414293
％The phase locked loop(PLL),adjusts the phase of a local oscillator ％w.r.t the incoming modulated signal.In this way,the phase of the ％incoming signal is locked and the signal is demodulated.This scheme ％is used in PM and FM as well. ％We will implement it by using a closed loop system.Control systems ％techniques are applied here.
标签： phase w.r.t oscillator modulated
上传时间： 2015-09-28
上传用户：zhangzhenyu
demodulates the FM modulated signal Y at the carrier frequency Fc (Hz). Y and Fc have sample frequency Fs (Hz). FREQDEV is the frequency deviation (Hz) of the modulated signal.
标签： demodulates the modulated frequency
上传时间： 2014-01-06
上传用户：皇族传媒
QAM16 modulated signal generation
标签： generation modulated signal QAM
上传时间： 2014-01-16
上传用户：waitingfy
QPSK modulated signal generating
标签： generating modulated signal QPSK
上传时间： 2013-12-31
上传用户：Andy123456
This m file plots the time and frequency domain of UWB PPM(pulse position modulated) waveforms(monocycles and doublets) with different pulse recurring frequency (PRF)and information rates.
标签： frequency modulated waveforms position
上传时间： 2016-06-28
上传用户：亚亚娟娟123
For sigma-delta modulated Factional-N P
标签： Factional-N sigma-delta modulated For
上传时间： 2016-11-09
上传用户：bcjtao
We simulate uncoded BER of BPSK modulated data as a function of SNR -in an AWGN channel -in a Rayleigh fading channel -in an AWGN channel when direct sequence spreading is used and compare results to the theoretical ones. We assume coherent receiver and perfect synchronization.
标签： modulated simulate function channel
上传时间： 2014-01-11
上传用户：1109003457
