Description: A major challenge to MIMO-OFDM systems is how to obtain the channel state in-
formation accurately and promptly for coherent detection of information symbols and
channel synchronization.,A major challenge to MIMO-OFDM systems is how to obtain the channel state in-
formation accurately and promptly for coherent detection of information symbols and
channel synchronization. Platform: |
Size: 41984 |
Author:Nirupa |
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Description: A major challenge to MIMO-OFDM systems is how to obtain the channel state in-
formation accurately and promptly for coherent detection of information symbols and
channel synchronization.,A major challenge to MIMO-OFDM systems is how to obtain the channel state in-
formation accurately and promptly for coherent detection of information symbols and
channel synchronization. Platform: |
Size: 964608 |
Author:Nirupa |
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Description: 此程序为采样频率同步，专门用于OFDM接收部分，用于定时同步-This procedure for the sampling frequency synchronization, specifically for the OFDM receiving section is used for timing synchronization Platform: |
Size: 446464 |
Author:牧童 |
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Description: ofdm基本原理及同步技术的研究，利用CP相关性，对ML算法和迭代ML算法进行了仿真，通过误码率的变化观察频偏估计对于系统的影响。-The basic principles and research ofdm synchronization technology, the use of CP correlation algorithm for ML and ML iterative algorithm for the simulation, the estimated impact of the system offset by changes observed error rate. Platform: |
Size: 690176 |
Author:li hua |
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Description: 基于802.11a标准的相对完整的OFDM收发系统，包含了频率同步、符号同步、信道估计等关键模块，对初学者很有帮助-Based on the 802.11a standard OFDM transceiver relatively complete system, including the frequency synchronization, symbol synchronization, channel estimation and other key modules, useful for beginners Platform: |
Size: 52224 |
Author:张斌 |
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Description: Application of spread spectrum for satellite land mobile systems is difficult in satellite link because of synchronization and
providing code or considerable Doppler shift. This is particularly high for LEO satellites. So that, a Doppler shift carrying a
frequency in band S can reach to several tens of kHz. To estimate and compensate Doppler, a CW pilot carrier is used. The
aim of this study is simulate Doppler frequency estimation using MIMO-OFDM technique. Finally, the proposed algorithm is
compared to MMSE algorithm in order to insure its performance. Platform: |
Size: 136192 |
Author:Neo Matrix |
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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.
Index Terms—Alamouti code, asynchronous cooperative diversity,
orthogonal frequency-division multiplexing (OFDM).-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.
Index Terms—Alamouti code, asynchronous cooperative diversity,
orthogonal frequency-division multiplexing (OFDM). Platform: |
Size: 106496 |
Author:Hakim |
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Description: A 16-QAM signal X, whose power is normalized as unity, is transmitted with OFDM over the discrete-time channel model h which has been used in Homework #2 and #3. As depicted in the below figure, the transmitter (TX) is now equipped with an N-point IDFT and the receiver (RX) with an N-point DFT, along with adding cyclic prefix (CP) and removing CP removal, respectively. The complex AWGN n is set with 20 dB SNR. Suppose that N=256 and the length of CP is 64. Assuming the OFDM system works with perfect synchronization. -Generate two pseudo random (PN) sequences for X, each with a length of 256 samples which are taken {+1,-1}, and add them before the 16-QAM data with a proper CP. The OFDM frame is depicted in the following figure. PN1 and PN2 are used for channel estimation now. Suppose the PN patterns are known at RX. Use the least squares (LS) method to estimate the channel by averaging the results obtained individually PN1 and PN2. (When perfoming the DFT window for the received signal at RX, you need to notice that the channel results in a delay of 22 samples.) Platform: |
Size: 210944 |
Author:淘爱57 |
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Description: 主同步信号PSS在时域上的相关仿真，搭建OFDM通信系统的框架，到达过程是的泊松过程，外文资料里面的源代码，主要为数据分析和统计，MIMO OFDM matlab仿真。- PSS primary synchronization signal in the time domain simulation related, Build a framework OFDM communication system, Arrival process is a Poisson process, Foreign materials inside the source code, Mainly for data analysis and statistics, MIMO OFDM matlab simulation. Platform: |
Size: 12288 |
Author:qidumq |
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Description: 基于OFDM调制解调通信系统的频偏估计技术matlab程序，对于研究者具有非常重要的参考价值。-QPSK modulation and demodulation literature, including modulation and demodulation, shaping filter, matched filtering, carrier synchronization, bit synchronization and other key technologies. For engineering and technical personnel have important reference value. Platform: |
Size: 23600128 |
Author:刘韦韦 |
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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: 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: 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: 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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Search - Synchronization for OFDM