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matlabASKPSKFSK
数字信号的传输方式分为基带传输和带通传输,在实际应用中,大多数信道具有带通特性而不能直接传输基带信号。为了使数字信号在带通信道中传输,必须使用数字基带信号对载波进行调制,以使信号与信道的特性相匹配。这种用数字基带信号控制载波,把数字基带信号变换为数字带通信号的过程称为数字调制。通常使用键控法来实现数字调制,比如对载波的振幅、频率和相位进行键控。(Transmission of digital signals into base band transmission and band-pass transmission, in practice, most of the channel with band-pass characteristics can not directly transmit base-band signal. In order to make the digital signal is transmitted with a communication channel, you must use the digital baseband signal to modulate the carrier to make the signal to match the characteristics of the channel. The digital baseband signal control with a carrier, the digital baseband signal conversion to digital bandpass signal is called digital modulation. Keying method is commonly used digital modulation, such as on the carrier' s amplitude, frequency and phase shift keying.)
- 2010-11-14 16:08:52下载
- 积分:1
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antennadesigninmatlab
一个利用Matlab仿真计算微带贴片天线底馈的程序(The use of Matlab simulation of a microstrip patch antenna fed at the end of the procedure)
- 2009-07-12 11:06:51下载
- 积分:1
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6940937DS-CDMA
Direct Sequence cdma
- 2011-10-01 18:32:45下载
- 积分:1
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melbankm
这个函数也要被melcepst函数调用,用来进行计算Mel倒谱系数。这个函数的作用是构造mel滤波器组。(This function must be called melcepst function is used to calculate Mel cepstral coefficients. The role of this function is to construct mel filter bank.)
- 2013-12-12 12:30:58下载
- 积分:1
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example4_3
例3:分析占空比为ta的矩形脉冲频谱
T=1 时间窗大小
ta=0.5 占空比
N=256
t=linspace(-T,T,N)
ts=2*T/N
fs=1/ts
(x=zeros(1,N)
x(N/2-round(N/2*ta):N/2+round(N/2*ta))=ones(1,2*round(N/2*ta)+1)
y=fft(x,N)
figure
plot(t,x)
title([ 时域信号图 占空比为 ,num2str(ta)])
axis([-T T-0.2 1.2])
xlabel( t /s )
figure
subplot(211)
f=linspace(-fs/2,fs/2,N)
plot(f,abs(fftshift(y))/N)
title([ 矩形脉冲双边谱 脉冲时间t=[- ,num2str(ta*T), , ,num2str(ta*T), ] ])
xlabel( f /Hz )
)
- 2010-05-25 20:59:59下载
- 积分:1
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adaptivethresholdhah
the threshold is determined and the foreground and background are seperated
- 2009-03-24 13:04:59下载
- 积分:1
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matrix_gain
基于MATLAB的matrix_gain详解,主要解决的是matrix_gain的问题(Based on MATLAB-matrix_gain explain, the main problem lies in the question of matrix_gain)
- 2008-04-06 21:56:33下载
- 积分:1
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juanji
说明: DSP中两个信号阵列卷积的两种算法。一种是看两个信号得结果,另一种是看结果的每一部分由信号中哪些部分组成。(DSP array convolution of two signals of the two algorithms.)
- 2009-08-09 11:09:50下载
- 积分:1
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roboearth
robotearth本体定义文件,定义了类别概念和关系等(The OWL ontologies used in the KnowRob system, about robot concept and class.)
- 2014-01-07 13:51:56下载
- 积分:1
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ohspeci
一种间接的估计信号的1.5维谱的方法,1.5维谱可以有效的抑制高斯噪声,加强低频分量。(An indirect estimate of the signal spectrum of 1.5-dimensional method, 1.5-dimensional spectrum can effectively suppress Gaussian noise, to enhance low frequency components.)
- 2007-12-04 16:18:47下载
- 积分:1