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Description: 最高效的FFT代码，信号源为固定文件，
芯片为5402，点数可变-FFT most efficient code, signal source to a fixed document for the 5402 chip, variable points
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Size: 61714 |
Author: 萧飒 |
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Description: 用于计算fft系数的程序，其中点数为2的n次幂可变-used to calculate the coefficient of procedures, which add up to two times the power of variable n
Platform: |
Size: 1243 |
Author: Ted |
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Description: 参数化FFT源代码，点数和位宽可变，内附testbench和说明文档-parameters of the source code FFT, counting and variable bit-enclosing testbench and documentation
Platform: |
Size: 84512 |
Author: wutailiang |
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Description: 最高效的FFT代码，信号源为固定文件，
芯片为5402，点数可变-FFT most efficient code, signal source to a fixed document for the 5402 chip, variable points
Platform: |
Size: 64512 |
Author: 萧飒 |
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Description: 用于计算fft系数的程序，其中点数为2的n次幂可变-used to calculate the coefficient of procedures, which add up to two times the power of variable n
Platform: |
Size: 1024 |
Author: Ted |
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Description: 参数化FFT源代码，点数和位宽可变，内附testbench和说明文档-parameters of the source code FFT, counting and variable bit-enclosing testbench and documentation
Platform: |
Size: 83968 |
Author: wutailiang |
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Description: Special Requirements
?nx must be a power of 2.
?The index array must be set up by bitrev_index before the function DSP_bitrev_cplx is called.
?If nx ?4K, one can use the char (8-bit) data type for the "index" variable. This would require changing the LDH when loading index values in the assembly routine to LDB. This would further reduce the size of the Index Table by half its size.
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Size: 1024 |
Author: pranav |
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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 |
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Description: FFT快速傅立叶变换-verilog，基于verilog的FFT源码，QuartusII上仿真通过-FFT Fast Fourier Transform-verilog, the FFT-based verilog source, QuartusII through the simulation
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Size: 741376 |
Author: fisher |
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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.
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Size: 280576 |
Author: zohreh |
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Description: 用双谱和小波变换去除信号中加性高斯噪声的相关程序
1.实现单个变量的双谱分析程序
2.用傅立叶反变换求自相关函数的程序
3.用fft求取喜好频谱、功率谱、均方根谱、对数谱的程序
4.读取.wav语音信号后用小波去加信白噪声的程序
5.用各种小波和阀值对同一信号去加性噪声效果比较的程序
-Double-spectral and wavelet transform to remove the signal plus Gaussian noise procedures 1. To achieve a single variable pairs of spectral analysis procedures 2. Using Fourier inverse transform procedures for seeking self-correlation function 3. To strike a preference to use fft spectrum , power spectrum, RMS spectrum, several spectra of the procedure 4. read. wav audio signal with wavelet plus a letter to the white noise process 5. with a variety of wavelet and threshold on the same signal to additive noise Comparison program
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Size: 5120 |
Author: 沈玉杰 |
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Description: 8点位数可变FFT算法的VHDL语言
已通过quartusii编译仿真-8-digit variable FFT algorithm VHDL, simulation has been compiled by quartusii
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Size: 2694144 |
Author: justin |
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Description: 基于FPGA的可变点FFT处理器的设计与实现-FPGA-based variable point FFT Processor Design and Implementation
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Size: 6688768 |
Author: 倦怠怪兽 |
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Description: A Low-power Variable-length FFT Processor Base on
Radix-24 Algorithm
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Size: 1242112 |
Author: rams |
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Description: A Low-power Variable-length FFT Processor Base on
Radix-24 Algorithm
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Size: 991232 |
Author: rams |
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Description: 1.用matlab实现对一个元音和一个清辅音的LPC系数，LPCC系数和MFCC系数的提取。
2，用LPC对这两个语音信号的功率谱进行估计，其中，LPC系数要分别有5阶，10阶，15阶和20阶四种情况，并在一个图里画出信号本身的FFT功率谱和四条不同阶数的LPC谱估计图，以作比较。注意，LPC和LPCC只考察自相关法。
3，用对数面积比的方法来求出这两个发音的变截面声管模拟图形，10阶即可-Using matlab to achieve the LPC coefficients of a vowel and a voiceless consonant, the extraction of LPCC Features coefficients and MFCC coefficients. LPC both the speech signal power spectrum estimate, which, LPC coefficients, respectively, five bands, 10 bands, 15 bands and 20 the first four cases, and draw a graph of the FFT power of the signal itself spectrum and four different orders of LPC spectral estimation map, for comparison. LPC and LPCC only examine the autocorrelation method. 3, the number of area ratio method to calculate the variable cross-section of the two pronunciation sound tube simulation graphics, 10 bands can be
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Size: 72704 |
Author: houjam |
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Description: 2008-2009年优秀硕士论文：基于FPGA的可变点FFT处理器的设计与实现.pdf-FPGA-based variable point FFT processor design and implementation. Pdf
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Size: 7018496 |
Author: dawei |
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Description: 可以用FFT频谱对脑电信号进行提取。我们可以利用提取出的各个波段脑电信号，来诊断一些脑部疾病或者对大脑组织的电活动及大脑的功能状态进行分析。
1.将实验测得的脑电数据文件转换为文本文件(已经过50Hz陷波)， 获得在Matlab 平台上可直接使用的脑电信号数据，即0661.txt。
2.在Matlab中导入数据，并提取Fp1通道的脑电信号，通过FFT变换对α，β，θ，δ波段进行提取，并做FFT逆变换变到时域。
3.计算各个波段的功率谱。-FFT spectrum can be extracted on EEG. We can use the extracted EEG each band to diagnose some brain disorders or brain tissue on the brain' s electrical activity and functional status were analyzed. One would experimentally measured EEG data file into a text file (has been 50Hz notch), obtained in Matlab platform can be used directly EEG data, that 0661.txt. (2) import data in Matlab and extract Fp1 channel EEG by FFT transform α, β, θ, δ bands were extracted, and do FFT inverse transform variable to the time domain. 3 calculate the power spectrum of each band.
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Size: 3391488 |
Author: nuaa030840105 |
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Description: Analog transmission. Analog transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. ... Others define that as digital transmission and as a digital signal.
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Size: 616448 |
Author: khang
|
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Description: fft在fpga上的实现
1.基于FPGA的1024点FFT算法实现；
2.基于FPGA的FFT算法设计与实现；
3.基于FPGA的可变点FFT处理器的设计与实现。(Implementation of FFT on FPGA
1. the implementation of 1024 point FFT algorithm based on FPGA;
2. the design and implementation of FFT algorithm based on FPGA;
3. design and implementation of a variable point FFT processor based on FPGA.)
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Size: 18886656 |
Author: wsf-jv |
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