Description: FFT与IFFT的简易源程序,用C语言编写,可进行复数和实数运算-FFT and IFFT simple source, the C language, can be complex and real operations Platform: |
Size: 19786 |
Author:陈斯 |
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Description: 构造了复数类，能实现复数的相关操作（比VC的COMPLEX类更易操作）；实现了一维傅立叶变换与反变换
，二维傅立叶变换与反变换-Construction of the complex category, to realize the relevance of plural operations (than the VC of COMPLEX type easier to operate) achieved a one-dimensional Fourier transform and inverse transform, two-dimensional Fourier transform and inverse transform Platform: |
Size: 9216 |
Author:李明 |
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Description: 1）已知2N点实数序列
N=64。用一个64点的复数FFT程序，一次算出 ，并绘出频谱 。
（2）已知某序列 在单位圆上的N=64等分样点的Z变换 。用N点IFFT程序计算 ，绘出图像 。
-1) known 2N-point sequence of real numbers N = 64. With a 64-point complex FFT process, a calculated and mapped the spectrum. (2) known to a certain sequence in the unit circle on the N = 64 sub-samples of the Z transform. N-point IFFT procedures used, the mapped image. Platform: |
Size: 8192 |
Author:lingdu0001 |
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Description: 3．完成系统的FPGA程序开发与调试，主要包括FFT，IFFT，CMUL和转置
存储控制等模块，在此基础上，重点介绍了一种基于DDR SDRAM的行写行读高
效转置存储算法，在采用该算法进行转置存储操作时，读写两端的速度相匹配，
满足流水线操作要求，提高了整个系统的实时性。最后介绍了采用CORDIC算法
实现复图像求模运算的方法，分析了算法的硬件实现结构，并给出了基于FPGA
的实现方法及仿真结果。-he FPGA s development and debugging are implemented,including FFT, IFFT, CMUL and C0ntrol of CTM．Based Oll this，Implementation of a high efficient corner turn memory arithmetic with writing and reading by row based on DDR SDRAM is introduced．When using CTM with this algorithm，me speed of reading and writing maItches and meets the requirement of pipelined operation．Finally a method of model implementation for complex image based on CORDIC algorithm is introduced．The algorithm’s hardware implementation structure is analysed, and implementation methodology and simulation results are given Platform: |
Size: 5155840 |
Author:mabeibei |
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Description: 实现复数的FFT变换及IFFT变换
在处理器或者WIN32下均可实现-Implementation of the FFT transform and complex IFFT transform processor or may be achieved under WIN32 Platform: |
Size: 1024 |
Author:linxing |
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Description: 本程序包括：DFT（离散傅里叶变换），FFT（快速傅里叶变换），IFFT（快速傅里叶逆变换），conv（卷积：圆周卷积、线性卷积），主要应用于信号处理，既可以对实序列做上述操作，也可以对复序列。-This process includes: DFT (Discrete Fourier Transform), FFT (fast Fourier transform), IFFT (inverse fast Fourier transform), conv (convolution: circular convolution, linear convolution), mainly used signal processing, either on the actual sequence to do the operation, can also be complex sequence. Platform: |
Size: 735232 |
Author:yangshoping |
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Description: TI C283X系列dsp浮点运算库，主要包括实数FFT复数FFT及IFFT-The TI the C283X family dsp floating-point arithmetic library, including real number FFT complex FFT and IFFT Platform: |
Size: 79872 |
Author: |
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Description: 一个FFT类以及一个复数类，实现了快速傅里叶变换及其反变换（FFT和IFFT）以及复数的运算。综合考虑各细节使碟形算法达到最高的效率。-An FFT class as well as a complex and realizes the fast Fourier transform and its inverse transform (FFT and IFFT) and a plurality of computing. Considering all details of the dish algorithm to achieve maximum efficiency. Platform: |
Size: 3072 |
Author:xiajie |
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Description: OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM(Multi Carrier Modulation)，多载波调制的一种。
OFDM技术由MCM（Multi-Carrier Modulation，多载波调制）发展而来。OFDM技术是多载波传输方案的实现方式之一，它的调制和解调是分别基于IFFT和FFT来实现的，是实现复杂度最低、应用最广的一种多载波传输方案。
在通信系统中，信道所能提供的带宽通常比传送一路信号所需的带宽要宽得多。如果一个信道只传送一路信号是非常浪费的，为了能够充分利用信道的带宽，就可以采用频分复用的方法。-OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, OFDM is a fact MCM (Multi Carrier Modulation), multi-carrier modulation.
OFDM technology was developed by MCM (Multi-Carrier Modulation, multi-carrier modulation) evolved. OFDM technology is one way to achieve a multi-carrier transmission scheme, its modulation and demodulation, respectively, based on IFFT and FFT to achieve, is to achieve the least complex, the most widely used of a multi-carrier transmission scheme.
In the communication system, the bandwidth of the channel can provide is usually higher than the bandwidth required to transmit a signal all the way to much wider. If a channel carries only one signal is very wasteful, in order to take full advantage of the bandwidth of the channel, you can use frequency division multiplexing method. Platform: |
Size: 14336 |
Author:wanghuan |
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Description: OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM(Multi Carrier Modulation)，多载波调制的一种。
OFDM技术由MCM（Multi-Carrier Modulation，多载波调制）发展而来。OFDM技术是多载波传输方案的实现方式之一，它的调制和解调是分别基于IFFT和FFT来实现的，是实现复杂度最低、应用最广的一种多载波传输方案。
在通信系统中，信道所能提供的带宽通常比传送一路信号所需的带宽要宽得多。如果一个信道只传送一路信号是非常浪费的，为了能够充分利用信道的带宽，就可以采用频分复用的方法。-OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing, OFDM is a fact MCM (Multi Carrier Modulation), multi-carrier modulation.
OFDM technology was developed by MCM (Multi-Carrier Modulation, multi-carrier modulation) evolved. OFDM technology is one way to achieve a multi-carrier transmission scheme, its modulation and demodulation, respectively, based on IFFT and FFT to achieve, is to achieve the least complex, the most widely used of a multi-carrier transmission scheme.
In the communication system, the bandwidth of the channel can provide is usually higher than the bandwidth required to transmit a signal all the way to much wider. If a channel carries only one signal is very wasteful, in order to take full advantage of the bandwidth of the channel, you can use frequency division multiplexing method. Platform: |
Size: 19456 |
Author:wanghuan |
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Description: ofdm仿真，用matlab仿真实现ofdm，为初学者提供一条道路(The proposed secret data embedding and extraction in
OFDM is shown in figure 1.In order to achieve higher data
rate, the serial data stream bits are converted in to parallel data
output bits. Then the modulation schemes can be BPSK,
QPSK or QAM, which in turn assigns the complex data
points. The orthogonality between subcarriers is maintained
by IFFT and FFT pairs which also transforms frequency
domain components to time domain and vice versa. 64 point
IFFT is used in this methodology.) Platform: |
Size: 30720 |
Author:haitao15 |
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Description: 实现基于STBC的MIMO_OFDM通信系统在不同信噪比情况下接收端的误比特率的仿真。发射端包括基于基带调制、空时编码、导频插入、IFFT、串并合并以及添加循环前缀；接收端包括去除循环前缀、取出导频估计信道、FFT运算以及并串合并，空时解码等。仿真中采用QPSK、空时编码采用4*3的复正交空时编码矩阵。OFDM子载波数为100，每个子载波传输66个符号，每个符号2比特。IFFT长度为512个符号。发射天线为3个接收天线为2个。(The BER simulation of MIMO_OFDM communication system based on STBC under different SNR is realized. The transmitter includes baseband modulation, space-time coding, pilot insertion, IFFT, serial-parallel combination and adding cyclic prefix; the receiver includes removing cyclic prefix, extracting pilot estimation channel, FFT operation, parallel-serial combination, space-time decoding, etc. The complex orthogonal space-time coding matrix is used in QPSK and space time coding in 4*3. The number of OFDM subcarriers is 100, and each subcarrier transfers 66 symbols with 2 bits per symbol. IFFT is 512 symbols in length. The transmitting antenna is 3 receiving antennas, 2.) Platform: |
Size: 3072 |
Author:guokeDz |
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