Location:
Search - fft snr
Search list
Description: OFDM程序，这么安排矩阵的目的是为了构造共轭对称矩阵
共轭对称矩阵的特点是 在ifft/fft的矢量上 N点的矢量
在0，N/2点必须是实数 一般选为0
1至N/2点 与 （N/2）+1至N-1点关于N/2共轭对称- BPSK simulation using a carrier cosine wave with ISI
clc
close all
clear all
figure(1)
n=160
for i=1:n
data(i)= 2*round(rand)-1
end
create modulated BPSK signal
first expand the bit stream
exdata=[]
for i=1:length(data)
for rep=1:5
exdata= [exdata data(i)]
end
end
ts=.1
t=1:ts:80.9
carrier=cos(pi*t)
multiply expanded bitstream by cosine wave with carrier frequency
this is the BPSK that is to be transmitted over the channel
bpsk=carrier.*exdata
bpsk=[bpsk(length(bpsk)-1) bpsk(length(bpsk)) bpsk]
plot(bpsk)
generating the noise
p=rand(1,800)*2*pi
p=rand*2*pi
snr=10
r=sqrt(-1*(1/snr*log(1- rand)))
no = 5*(r.* exp(j*p))
no = (r.* exp(j*p))
value of alpha
al=rand+j*rand
al=1
Spreading channel with the alpha as the variable
for k=5:5:795
for l = 1:5
al=round(rand)+j*round(rand)
rec(k+l)=bpsk(k+l)+al*bpsk(k-5+l)
end
end
rxdata=rec+ no
begin demodulation
first multiply recie
Platform: |
Size: 6146048 |
Author: 卞敏捷 |
Hits:
Description: Test CA-CFAR on FFT of sinusoidal beats with controllable SNR
Platform: |
Size: 1024 |
Author: Khubaib |
Hits:
Description: 设计了一个OFDM接收机，并采用1fI公司的TMS320C6416芯片进行实现。在假设理想
同步的前提下，该系统进行了FFT变化、使用了Ls(最小二乘法)进行信道估计，并且采用了
QPSK算法进行解调。最后将接收机输出数据与发端数据进行比较，在不同信噪比情况下计算其
误码率，得出了比较理想的结果。-An OFDM receiver is designed in山is paper and realized on the platform of the 1MS32OC6416 chip
of the TI company．Under the assumption of ideal synchronization．n叩transformation is realized in the system
wit}l LS method implemented in the channel estimation module and QPSK used in the demodulation module．
Finally，BER is calculated in different cases of SNR and the result is achieved as expected．
Platform: |
Size: 243712 |
Author: 王熹 |
Hits:
Description: A FFT-based partial matched filter (PMF)
acquisition threshold setting method for fast GPS acquisition is
presented. Normal distribution and numerical fitting technique
instead of real decision variable (DV) distribution are used in
derivation to approximate the threshold expression, and the
modification method for the threshold expression is also
presented. The threshold expression is based on the individual
FFT Doppler bin false alarm probability rather than the
convention whole detector false alarm probability. The
proposed threshold expression can be adjusted according to
the false alarm probability, the noncoherent accumulation
(NCA) length and the estimated noise variance. Furthermore
we discuss the implementation of zero-padding FFT with its
advantage and limitation. The performance is superior
compared to the reference method in terms of signal-to-noise
ratio (SNR) when detection and false alarm probabilities are
used as measurement criteria.
Platform: |
Size: 280576 |
Author: zohreh |
Hits:
Description: 基于FFt的ADC动态性能测试，包括SNR，ENOB等,方法基于IEEE标准测试方法。可以加载文件中数据进行分析。-A thorough investigation in ADC‘s dynamic performance based on FFT.
Platform: |
Size: 2048 |
Author: wangjian |
Hits:
Description: 用相位差法实现正弦信号的相位估计，分析snr和FFT长度的影响。-failed to translate
Platform: |
Size: 2048 |
Author: fangjingjing |
Hits:
Description: 流水线模数转换电路输出信号做fft后求SNR,SNDR的matlab程序-matlab fft program for SNR and SNDR of pipelined analog to digital converter（ADC）
Platform: |
Size: 149504 |
Author: liu |
Hits:
Description: snr calculation based on FFT
Platform: |
Size: 1024 |
Author: Nima |
Hits:
Description: 通用高速ADC动态性能测试MATLAB code，包括SNR，SINAD，ENOB，THD，SFDR，并绘制频域幅值曲线-MATLAB code for high speed ADC dynamic specific tests, including SNR, SINAD, ENOB，THD，SFDR，and so on.
Platform: |
Size: 2048 |
Author: kam kou |
Hits:
Description: 利用fft()进行快速傅立叶变换，得到频谱，画出正弦函数及其频谱
找出频谱中使得Y轴取最大值时的估计频率记为ft
加入白噪声，绘出信噪比和均方误差的关系曲线
- using fft () for fast Fourier transformation, spectrum, to draw the sine function and its spectrum find the spectrum makes the Y-axis maximum value when the estimated frequency is denoted by ft adding white noise, SNR plot and mean square error curve
Platform: |
Size: 1024 |
Author: xin |
Hits:
Description: 求正弦信号fft，并利用该fft计算正弦信号的功率，信噪比等-Seeking sinusoidal signal fft, fft calculated using the sinusoidal signal power, SNR, etc.
Platform: |
Size: 1024 |
Author: kun |
Hits:
Description: 利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。-Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.
Platform: |
Size: 1024 |
Author: 云卷云舒 |
Hits:
Description: 基于FFT的伪码捕获，并且非相关累加使之工作在更低信噪比条件下。-FFT-based pseudo-code acquisition, and non-work related cumulative so that at lower SNR.
Platform: |
Size: 1024 |
Author: 陈适 |
Hits:
Description: Description
Applies ideal binary mask to noise corrupted speech signal. The processing takes place within an FFT based short-time spectral analysis-modification-synthesis framework. The ideal binary mask is computed from an oracle (true) signal-to-noise ratio (SNR) through thresholding with local SNR criterion. The routine returns synthesized enhanced speech, the ideal binary mask and the true instantaneous spectral SNR.
Platform: |
Size: 903168 |
Author: fatz |
Hits:
Description: 一个FFT改进版程序，使用kaiser窗；可以方便地打出信号的频谱包络，以及算出SNR/SINAD/THD/SFDR等各种数值。工程上使用非常便利-FFT with Kaiser Wndw, easily plot out the Frequent spetrum and the SNR/SINAD/THD/SFDR performance values
Platform: |
Size: 2048 |
Author: |
Hits:
Description: 采用频域FFT变换实现对雷达回波信号的MTI处理，有效的提高信噪比，本程序是对这一过程的验证。-Using frequency domain FFT transform of radar echo signal processing on the MTI, effectively improve the SNR, the procedures for the process validation.
Platform: |
Size: 1024 |
Author: fengfeng |
Hits:
Description: dwpt mc cdma communications system simulation paper
Platform: |
Size: 262144 |
Author: husam |
Hits:
Description: calculate the SNR of a signal using a FFT plot
Platform: |
Size: 1024 |
Author: bacigal |
Hits:
Description: 基于先验信噪比和VAD的谱减法语音降噪处理(Noise reduction by spectral subtraction based on prior SNR and VAD)
Platform: |
Size: 6401024 |
Author: 刘阳
|
Hits:
Description: sigma delta ADC的模型，以及计算sigma delta调制器的SNR(The model of sigma delta ADC,and how to calculating the SNR of the sigma delta ADC)
Platform: |
Size: 59392 |
Author: 小明与小明 |
Hits: