Description: 单径或多径瑞利衰落信道仿真，主同步信号PSS在时域上的相关仿真，MIMO OFDM matlab仿真。- Single path or multipath Rayleigh fading channel simulation, PSS primary synchronization signal in the time domain simulation related, MIMO OFDM matlab simulation. Platform: |
Size: 6144 |
Author:王小才 |
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Description: In this letter, we propose a simple orthogonal
frequency-division multiplexing (OFDM) scheme for an asynchronous cooperative system, where OFDM is implemented at the source node, and time-reversion and complex conjugation are implemented at the relay nodes. The cyclic prefix (CP) at the source node is used for combating the timing errors the relay nodes.
In this scheme, the received signals at the destination node have the Alamouti code structure on each subcarrier, and thus, it has
the fast symbol-wise ML decoding. It should be emphasized that the relay nodes only need to implement the time-reversion, some sign changes plus to minus, and/or the complex conjugation to the received signals, and no IDFT or DFT operation is needed.It is shown that this simple scheme achieves second-order diversity
gain without the synchronization requirement at the relay nodes.-In this letter, we propose a simple orthogonal
frequency-division multiplexing (OFDM) scheme for an asynchronous cooperative system, where OFDM is implemented at the source node, and time-reversion and complex conjugation are implemented at the relay nodes. The cyclic prefix (CP) at the source node is used for combating the timing errors the relay nodes.
In this scheme, the received signals at the destination node have the Alamouti code structure on each subcarrier, and thus, it has
the fast symbol-wise ML decoding. It should be emphasized that the relay nodes only need to implement the time-reversion, some sign changes plus to minus, and/or the complex conjugation to the received signals, and no IDFT or DFT operation is needed.It is shown that this simple scheme achieves second-order diversity
gain without the synchronization requirement at the relay nodes. Platform: |
Size: 107520 |
Author:Hakim |
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Description: 实现OFDM系统的同步功能，包括时钟同步，频率同步等。-Realize the synchronization function of OFDM system, including the clock synchronization, frequency synchronization and so on. Platform: |
Size: 3072 |
Author:zhanglele |
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Description: 混沌的判断指标Lyapunov指数计算,ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，主同步信号PSS在时域上的相关仿真。- Chaos indicator for Lyapunov index calculation, ofdm system simulation including 16qam modulation fft windowing modules plus cp, PSS primary synchronization signal in the time domain simulation related. Platform: |
Size: 6144 |
Author:gaisoulenpiu |
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Description: matlab中ofdm的方针，实现了其中的关键技术，信道估计，循环前缀，m序列同步-The principle of ofdm in matlab, the realization of the key technology, channel estimation and cyclic prefix, m sequence synchronization Platform: |
Size: 6144 |
Author:赵志伟 |
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Description: 先由zc序列生成主同步信号pss，再由主同步信号生成一个ofdm符号-First by the primary synchronization signal sequence generation zc pss, then generates a synchronization signal the main ofdm symbol Platform: |
Size: 1024 |
Author:付香香 |
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Description: 搭建OFDM通信系统的框架，用于建立主成分分析模型，主同步信号PSS在时域上的相关仿真。- Build a framework OFDM communication system, Principal component analysis model for establishing, PSS primary synchronization signal in the time domain simulation related. Platform: |
Size: 9216 |
Author:宋燕明 |
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Description: 正交频分复用(OFDM)技术是一种可以有效对抗符号间干扰(ISI)的高速数据传输技术。OFDM是一种特殊的多载波调制方式，它的基本思想是将高速传输的数据流通过串/并转换，变成在若干个正交的窄带子信道上并行传输的低速数据流。OFDM接收机有三个关键技术：信道估计技术，降低峰均比(PAPR)技术和同步技术。OFDM技术能有效的对抗多径衰落等，有着诸多的优点，但是OFDM有一个发展瓶颈，即OFDM信号的峰均功率比很大，很容易导致OFDM信号的交调失真和系统性能的下降。因而如何降低OFDM信号的峰均功率比一直是OFDM技术的一个研究热点问题。论文针对上述问题，重点研究了降低OFDM信号的峰均功率比的SLM与PTS算法，并利用Matlab对算法进行了仿真研究，并对仿真结果进行了分析。-Orthogonal frequency division multiplexing (OFDM) is a high-speed data transmission technology that can effectively combat inter-symbol interference (ISI). OFDM is a special multi-carrier modulation method, its basic idea is to high-speed transmission of data stream through the serial/parallel conversion, in a number of orthogonal narrowband sub-channel parallel transmission of low-speed data stream. OFDM receivers have three key technologies: channel estimation techniques, reduced peak-to-average ratio (PAPR) techniques and synchronization techniques. OFDM technology can effectively combat multipath fading, etc., there are many advantages, but OFDM has a bottleneck in development, that is, OFDM signal peak power ratio is large, it is easy to lead to OFDM signal intermodulation distortion and system performance degradation. Therefore, how to reduce the peak-to-average power ratio of OFDM signal has been a hot topic in OFDM technology. In this paper, the SLM and PTS algorithms for reduc Platform: |
Size: 142336 |
Author:num113 |
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Description: PSS primary synchronization signal in the time domain simulation related, MIMO OFDM matlab simulation, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion. Platform: |
Size: 150528 |
Author:gouneinaonan
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Description: Build a framework OFDM communication system, LCMV optimization design array signal processing, PSS primary synchronization signal in the time domain simulation related. Platform: |
Size: 149504 |
Author:faogiumaobun
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Description: 机械学习算法，用于求解OFDM系统中基于循环前缀的定时同步的迭代方法(Mechanical learning algorithm for solving the iterative method of timing synchronization based on cyclic prefix in OFDM system) Platform: |
Size: 1024 |
Author:酷月风影
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Description: 机械学习算法，用于求解OFDM系统中基于循环前缀的定时同步的迭代求解方法(Mechanical learning algorithm for solving the iterative method of timing synchronization based on cyclic prefix in OFDM system) Platform: |
Size: 11264 |
Author:酷月风影
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Description: 该算法是迄今为止我找到的最好的最完整的单载波频域均衡的原理。众所周知，时域均衡一直是接收机的瓶颈能估，频域均衡则要简单的多。频域均衡使用基于块传输的机制，类似于OFDM，并且是单载波的。接收机十分完整，包含载波同步、帧同步等，最重要的均衡处理。(This algorithm is the best and the most complete single carrier frequency domain equalization principle I have found so far. As we all know, time domain equalization is always the bottleneck of the receiver, and frequency domain equalization is much simpler. Frequency domain equalization is based on block transmission mechanism, which is similar to OFDM and is single carrier. The receiver is very complete, including carrier synchronization, frame synchronization, and so on, the most important equalization processing.) Platform: |
Size: 15360 |
Author:呆_呆 |
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Description: 6. 在三条径的瑞利信道中，对于OFDM：
(1) 请设计一种具体的导引辅助的信道估计方法，用Simulink进行仿真。画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。
(2) 设频率已同步，请设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
(3) 设时间已同步，请设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(6. In the three-path Rayleigh channel, for OFDM:
(1) please design a specific navigation-assisted channel estimation method and use Simulink for simulation.The relation curves of bit signal-noise ratio and channel estimation mean square error and the relation curves of bit signal-noise ratio and bit error rate are drawn.
(2) if the frequency has been synchronized, please design a specific method of time synchronization using cyclic prefix in OFDM. Simulink is used for simulation to draw the relationship curve between bit-snr and acquisition probability.
(3) if time has been synchronized, please design a specific method of frequency synchronization using cyclic prefix in OFDM. Simulink is used for simulation to draw the relationship curve between bit signal-to-noise ratio and frequency synchronization error.) Platform: |
Size: 318464 |
Author:kmdcdy |
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