Location:
Search - fourier ofdm
Search list
Description: OFDM中的关于快速傅立叶变换的个人设计的MATLAB的算法，比较经典的 ！-OFDM on the Fast Fourier Transform personal design MATLAB algorithm, more classic!
Platform: |
Size: 20964 |
Author: yeyue |
Hits:
Description: OFDM中的关于快速傅立叶变换的个人设计的MATLAB的算法，比较经典的 ！-OFDM on the Fast Fourier Transform personal design MATLAB algorithm, more classic!
Platform: |
Size: 20480 |
Author: yeyue |
Hits:
Description: 快速傅立叶变换方法实现快速卷积，比较好用-fast Fourier transform method to achieve rapid convolution, better quality
Platform: |
Size: 115712 |
Author: 谢志宏 |
Hits:
Description: OFDM用于有限传输的程序，主要用于光纤信道的传输-OFDM transmission for a limited procedure, mainly for the fiber channel transmission
Platform: |
Size: 2048 |
Author: 史新亮 |
Hits:
Description: 利用Mpi编写的FFT的并行实现，很不错的阿-prepared by the use of prostitutes parallel FFT, very good A
Platform: |
Size: 3072 |
Author: sun ligang |
Hits:
Description: MATLAB 的有限序列的离散傅里叶变换（DFT）源程序-MATLAB finite sequence of discrete Fourier transform (DFT) source
Platform: |
Size: 1024 |
Author: 陈咚咚 |
Hits:
Description: 第十章 MATLAB 图像正交变换
10.1 正交变换通用算子
10.2 傅立叶变换
10.2.1 傅立叶变换的原理
10.2.2 傅立叶性质
10.2.3 二维离散傅立叶变换（ 2DDFT ）
10.2.4 快速傅立叶变换（ FFT ）
10.2.5 傅立叶变换的研究与应用
10.3 离散余弦变换
10.3.1 DCT 变换矩阵
10.3.2 dct2 函数和 dctmtx 函数
10.4 Walsh- Hadamard 变换
10.5 Radon 变换
10.6 小波变换
10.6.1 小波的定义
10.6.2 小波变换函数
10.6.3 小波变换实例
10.6.4 小波除噪与压缩函数 -Chapter X MATLAB image orthogonal transformation orthogonal transformation 10.1 GM 10.2 Operators 10.2.1 Fourier transform Fourier transform Fourier 10.2.2 the nature of the principle of two-dimensional 10.2.3 Discrete Fourier Transform (2DDFT) 10.2 .4 Fast Fourier Transform (FFT) 10.2.5 Fourier Transform 10.3 Research and Application of Discrete Cosine Transform 10.3.1 DCT transformation matrix 10.3.2 dct2 function and dctmtx function 10.4 Walsh-Hadamard Transform 10.5 Radon Transform 10.6 wavelet transform 10.6.1 the definition of wavelet function 10.6.2 Wavelet Transform Wavelet Transform 10.6.3 Examples 10.6.4 Wavelet Denoising and Compression Functions
Platform: |
Size: 5120 |
Author: 王万国 |
Hits:
Description: PERFORMANCE ANALYSIS OF OFDM
Orthogonal Frequency-Division Multiplexing (OFDM) — essentially identical to Coded OFDM
(COFDM) — is a digital multi-carrier modulation scheme, which uses a large number of closely-spaced
orthogonal sub-carriers. Each sub-carrier is modulated with a conventional modulation scheme (such as
quadrature amplitude modulation) at a low symbol rate, maintaining data rates similar to conventional
single-carrier modulation schemes in the same bandwidth. In practice, OFDM signals are generated and
detected using the Fast Fourier transform algorithm.
Platform: |
Size: 274432 |
Author: kaykay |
Hits:
Description: 离散分数阶傅里叶变换，可以处理非平稳信号，也可以很好的对抗多普勒频移，用在OFDM系统中尤为重要。-Discrete fractional Fourier transform, can handle non-stationary signal can also be very good against the Doppler frequency shift, used in the OFDM system is particularly important.
Platform: |
Size: 1024 |
Author: suokun |
Hits:
Description: This document is a studying on the Fourier OFDM and Wavelet OFDM.
Platform: |
Size: 293888 |
Author: Tuyen |
Hits:
Description: CFFT is a radix-4 fast Fourier transform (FFT) core with configurable data width and
a configurable number of sample points in the FFT.
Twiddle factors are implemented using the CORDIC algorithm, causing the gain of the
CFFT core to be different from the standard FFT algorithm. This variation in gain
is not important for orthogonal frequency division modulation (OFDM) and demodulation.
The gain can be corrected, to that of a conventional FFT, by applying a constant
multiplying factor.
Platform: |
Size: 183296 |
Author: Nagendran |
Hits:
Description: Multicarrier modulation helps to reduce the detrimental effects of multipath fading. Because of its
robustness to multipath, and the ease of implementating it in transmitters and receivers using the
fast Fourier transform (FFT), the MCM concept is growing rapidly in practical importance. It can
be found today in IEEE standards 802.11a, 802.15.3 and 802.16a, as well as standards for digital
broadcasting of television and radio. This document serves to derive the multicarrier modulation
method from first principles.
Platform: |
Size: 10045440 |
Author: deepa |
Hits:
Description: 利用离散傅里叶变换实现ofdm调制，文章很有影响力，极力推动了ofdm技术的应用和传播-Data Transmission by Frequency Division_Multiplexing Using the Discrete Fourier Transform
Platform: |
Size: 591872 |
Author: bo |
Hits:
Description: vhdl code for inverse fourier transform
Platform: |
Size: 1024 |
Author: nancy |
Hits:
Description: 用MATLAB对OFDM系统进行了仿真分析。包括信道调制方式16QAM、快速傅立叶变换、循环前后缀及信道函数窗函数等，最后计算了系统的误码率，毕设资料，非常珍贵。- MATLAB OFDM system for the simulation. the simulation uses OFDM each function module, Including 16 channel modulation QAM, Fast Fourier Transform, revolving around prefix and channel Function window function, etc. Finally, Calculate BER for OFDM system
Platform: |
Size: 5120 |
Author: 杨梅 |
Hits:
Description: OFDM系统调制与解调，采用快速傅里叶变换，内含CP-OFDM system modulation and demodulation, using fast Fourier transform, containing CP
Platform: |
Size: 1024 |
Author: 郑天潇 |
Hits:
Description: 正交频分复用（OFDM）是一种通过快速傅里叶变换实现的多载波宽带数字调制技术。相比一般的数字通信系统。它具有频带利用率高和抗多径干扰能力强等优点，因而适合于高速率的无线通信系统。正交频分复用 OFDM 是第四代移动通信的核心技术。论文首先简要介绍了OFDM基本原理。在给出OFDM系统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。-Orthogonal frequency division multiplexing (OFDM) is a fast Fourier transform of the multi-carrier wideband digital modulation through. Compared to the general digital communication system. It has high bandwidth efficiency and resistance to multipath interference ability, etc., which is suitable for high-speed wireless communications systems. Orthogonal frequency division multiplexing (OFDM) is a core technology of fourth generation mobile communication. Firstly, brief introduction to the basic principles of OFDM. On the basis of a given OFDM system model, using MATLAB language to achieve a computer simulation program and gives the reference design of the entire system.
Platform: |
Size: 4096 |
Author: 张生 |
Hits:
Description: Channel estimation techniques for OFDM systems based on a pilot arrangement are investigated. Channel estimation based on a comb type pilot arrangement is studied through different algorithms for both estimating the channel at pilot frequencies and interpolating the channel. Channel estimation at pilot frequencies is based on LS and LMS methods while channel interpolation is done using linear interpolation, second order interpolation, low-pass interpolation, spline cubic interpolation, and time domain interpolation. Time-domain interpolation is obtained by passing to the time domain by means of IDFT (inverse discrete Fourier transform), zero padding and going back to the frequency domain by DFT (discrete Fourier transform). In addition, channel estimation based on a block type pilot arrangement is performed by sending pilots in every sub-channel and using this estimation for a
Platform: |
Size: 3072 |
Author: MUHAMMAD SHAKIL |
Hits:
Description: Fractional Fourier transform computing, The commonly used digital signal modulation based on artificial neural network, Including single sideband, double sideband, suppressed carrier and quadruple.
Platform: |
Size: 5120 |
Author: mdqgtd
|
Hits:
Description: PTS的基本思想是：将输入的OFDM符号X，分割成V个互不重叠的独立的子序列Xv，每个子块向量大小相等且子块中没有继承原符号相应位置的取值为0。经过N点快速傅里叶逆变换后获得时域信号xv，再与相位旋转因子系数bv相乘，最后将每个子块的结果求和。然后将使PAPR最小的旋转因子的最佳组合作为边带信息传送给接收机以恢复信号。
在PTS方法中，可以通过改变子序列的分割方式降低系统计算复杂度和改善系统性能。有三种常用的分割方法：相邻分割、伪随机分割和交织分割。(The basic idea of the partial transmission sequence method (PTS) is to split the input OFDM symbol X into V independent non-overlapping subsequences Xv, each of equal size and no inheritance of the corresponding position of the original symbol in the sub-block to take the value of 0. After N-point fast Fourier inversion to obtain the time domain signal xv, and then multiply with the phase rotation factor bv, and finally sum up the results of each sub-block . The best combination of rotation factors that minimizes the PAPR is then transmitted to the receiver as sideband information to recover the signal.
In the PTS method, the system computational complexity can be reduced and the system performance improved by changing the segmentation of the subsequence. There are three commonly used segmentation methods: adjacent segmentation, pseudo-random segmentation, and interleaved segmentation.)
Platform: |
Size: 3072 |
Author: zsdslehqm |
Hits: