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Description: 这个程序是用限幅法抑制峰均功率比的matlab仿真程序，对100000个OFDM符号进行统计然后表征算法对PAPR的改进程度，绝对可以运行-this procedure is limiting law inhibited PAPR of Matlab simulation program, to 100,000 OFDM symbols statistical algorithm then characterization of the degree of the improvement PAPR, absolutely can run
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Size: 1024 |
Author: baoruihan |
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Description: 这个程序是用SLM算法抑制峰均功率比的matlab仿真程序，对100000个OFDM符号进行统计然后表征算法对PAPR的改进程度，绝对可以运行-this process is inhibited by SLM algorithm PAPR of Matlab simulation program, to 100,000 OFDM symbols statistical algorithm then characterization of the degree of the improvement PAPR, absolutely can run
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Size: 1024 |
Author: baoruihan |
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Description: 这个程序是用星座图扩展法抑制峰均功率比的matlab仿真程序，对100000个OFDM符号进行统计然后表征算法对PAPR的改进程度，绝对可以运行-this procedure is expanding constellation Suppressing PAPR of Matlab simulation program, to 100,000 OFDM symbols statistical algorithm then characterization of the degree of the improvement PAPR, absolutely can run
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Size: 1024 |
Author: baoruihan |
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Description: 这个程序是用格雷-RM编码法抑制峰均功率比的matlab仿真程序，对1000个OFDM符号进行统计然后表征算法对PAPR的改进程度，绝对可以运行-This procedure is used Gray- RM coding method for suppressing the peak to average power ratio of Matlab simulation program, 1,000 pairs of OFDM symbols statistics then PAPR characterization of the algorithm improvements, definitely can run
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Size: 1024 |
Author: baoruihan |
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Description: OFDM及其基带FFT实现原理以及OFDM的载波和符号同步问题-and OFDM baseband FFT principle and the carrier OFDM symbols and Synchronization
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Size: 134144 |
Author: Heaton |
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Description: 基于DVB-T标准,COFDM调制系统的利用导频信号进行符号粗同步,仿真条件：68个OFDM符号，64QAM调制，莱斯信道-Based on DVB-T standard, COFDM modulation system using pilot symbols rough signal synchronization, simulation conditions: 68 OFDM symbols, 64QAM modulation, Rice channel
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Size: 2048 |
Author: 穆佳 |
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Description: 基于DVB-T标准,COFDM调制系统的信道估计,仿真条件：4个OFDM符号，QPSK调制，二维内插，瑞利多径信道-Based on DVB-T standard, COFDM modulation system for channel estimation, simulation conditions: 4 OFDM symbols, QPSK modulation, two-dimensional interpolation, Rayleigh multipath channel
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Size: 3072 |
Author: 穆佳 |
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Description: OFDM仿真程序MATLAB
接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档-MATLAB simulation program OFDM receiver algorithm and procedures used in processes and the sending end to send the frame structure of OFDM symbols are. Concrete frame structure, as well as the timing estimation, frequency offset estimation, the remaining error tracking algorithm algorithm can refer to documentation
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Size: 124928 |
Author: |
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Description: 一种关于OFDM系统训练符号的改进同步算法。该算法克服了训练符号算法需要大的采样数据的缺点，缩短了定时捕获的时间。-A systematic training on the OFDM symbols to improve the synchronization algorithm. The algorithm overcomes the training symbols algorithm require large sampling data shortcomings, shortened the time to regularly capture.
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Size: 45056 |
Author: fisher |
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Description: WLAN仿真－发送机
wlan No Comments
设置完系统参数后，开始产生发送数据。
1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。
2. QAM映射
3. 将数据映射到不同载波，形成OFDM符号
4. 产生pilot，并将pilot插入OFDM符号中
5. 加入dc和guard子载波
6. 进行ifft，将频域信号变到时域，并加入循环前缀
7. 对信号进行overlap window
8. 在时域产生short preamble
9. 在时域产生long preamble
10. 将preamble和数据符号组成packet
11. 升采样
得到信道传输的数据Tx_signal_up
具体程序见附件 wlan_transmitter.m-WLAN Simulation- wlan No Comments transmitter system parameters set finished, the beginning to have to send data. 1. Have sent random bit (tx_bits), here does not consider channel coding. 2. QAM mapping 3. The data is mapped to a different carrier to form OFDM symbols 4. Have a pilot, and pilot inserted OFDM symbols 5. Adding dc and guard subcarriers 6. To carry out ifft, will change the frequency domain signal to time domain, and add cyclic prefix 7. the signals overlap window8. In the time domain have a short preamble9. In the time domain have a long preamble10. the preamble and data symbols packet11. or sampling received data transmission channel Tx_signal_up specific procedures see Annex wlan_transmitter.m
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Size: 1024 |
Author: 福东方 |
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Description: OFDM符号的类型判断与1_2保护间隔预校正-OFDM symbols to determine the type of 1_2 guard interval with pre-correction
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Size: 49152 |
Author: 萧球水 |
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Description: 代码为对OFDM符号信道估计结果进行线性插值的仿真代码-Code symbols for the OFDM channel estimation results of linear interpolation of the simulation code
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Size: 1024 |
Author: 张宇治 |
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Description: 本文在分析移动无线信道衰落特性的基础上,阐述了OFDM系统的基本原理,主要研究了OFDM通信系统中的基于导频符号的信道估计问题,分析了几种经典的信道估计算法以及相关的关键技术环节。 在此基础上介绍了OFDM技术在现实中的一个应用——WLAN IEEE802.11a系统模型,利用Matlab仿真软件完成OFDM系统信号生成、噪声生成、导频插入、循环前缀、调制、解调等部分的设计,最后结合计算机仿真对系统关键技术(导频、循环前缀、估计算法)的有效性和可行性进行了全面的分析与比较。适合matlab研究-Based on the analysis of mobile channel fading characteristics based on the OFDM system on the basic principles of research in the OFDM communication system of the pilot symbols based on channel estimation problem, an analysis of several classical channel estimation algorithm and the associated key technical links. On this basis, introduced OFDM technology in a practical application- WLAN IEEE802.11a system model, using Matlab simulation software to complete OFDM signal generation, noise generation, pilot insertion, cyclic prefix, modulation, demodulation and other parts of the design, the final combination of computer simulation of the system of key technologies (pilots, cyclic prefix, it is estimated that algorithm) the effectiveness and feasibility of a comprehensive analysis and comparison. Suitable for research matlab
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Size: 1339392 |
Author: 赵洪森 |
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Description: calculate the PAPR of ofdm symbols and also plot ccdf
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Size: 1024 |
Author: ashish |
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Description: the spectrum of the OFDM symbols in time domain
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Size: 1024 |
Author: aya2002 |
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Description: 接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。-Receiver used algorithms and program flow with the sender sends the frame structure of OFDM symbols are. Concrete frame structure and timing estimates, frequency offset estimation, the remaining error tracking algorithm can reference algorithm documentation.
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Size: 406528 |
Author: keven |
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Description: 导频符号调制方式对OFDM信道估计的影响，自己觉得不错的文献，分享下-Pilot symbols of the OFDM modulation channel estimation of the impact of feel good literature, to share the next
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Size: 367616 |
Author: 李龙 |
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Description: In this paper, we present a novel data-based method for simultaneous Maximum Likelihood
(ML) symbol and carrier-frequency o畇et estimation in Orthogonal frequencydivision
multiplexing (OFDM) systems. Statistical properties introduced by the cyclic
pre痻, a guard space between OFDM symbols, provide su眂ient information about the
unknown parameters. It is shown that the redundancy introduced by this cyclic pre痻
allows the estimation to be performed without additional pilots. Simulations show that
the performance of the frequency estimator is applicable in a tracking mode while the
timing estimation can be used in an acquisition mode.
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Size: 512000 |
Author: ashish |
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Description: OFDM symbol Generator，matlab-code for Generation of OFDM-symbols。
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Size: 5120 |
Author: 林峰 |
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Description: 一个非常完整的ofdm程序。接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。包括具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法-Ofdm a very complete program. Receiver using the algorithm and program flow with the sender sends the frame structure of OFDM symbols are related. Including specific frame structure and timing estimation, frequency estimation, residual error tracking algorithm
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Size: 253952 |
Author: 刘雪芳 |
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