Description: OFDM频域算法，根据WLAN前导的长训练符号完成所有对子载波的信道频率响应的简单有效的估算，这两个长训练符号内容是一样的，因此二者的平均可以改进信道估算的质量。-OFDM frequency-domain algorithm, according to leading WLAN long training symbols to complete all the pairs of channel-carrier frequency response of simple and effective estimate, the two long training symbols is the same as the content, so they can improve the average quality of channel estimation. Platform: |
Size: 1024 |
Author:李贞铭 |
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Description: 采用前导结构进行分组检测，利用前导中短训练符号的周期性，该方法又称为延时和相关算法。-The use of pre-division structure detection, the use of lead in the cyclical nature of short training symbols, the method is also known as the delay and related algorithms. Platform: |
Size: 2048 |
Author:李贞铭 |
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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. Platform: |
Size: 45056 |
Author:fisher |
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Description: 子载波数 128
位数/ 符号 2
符号数/ 载波 1000
训练符号数 0
循环前缀长度 8 (1/16)*T
调制方式 4-QAM
多径信道数 3
IFFT Size 128
信道最大时延 2
-Subcarriers median number of 128 percent/2 percent symbol symbol number/carrier training symbols 1000 a few 0 cyclic prefix length of 8 (1/16)* T modulation 4-QAM the number of multi-path channel 3 IFFT Size 128 the largest delay channel 2 Platform: |
Size: 24576 |
Author:张川 |
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Description: 这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。
-This is a space-time block coding based on the MIMO_OFDM Communication System Simulation and Design. This system consists of QPSK modulation and demodulation, IFFT modulation, space time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 12288 |
Author:小于儿 |
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Description: STBC_MIMO_OFDM.m
这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。
此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训
练符号的信道估计等通信模块。
-STBC_MIMO_OFDM.m This is a space-time block coding based on the MIMO_OFDM Communication System Simulation and Design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 14336 |
Author:梁勇 |
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Description: 这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。
此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。
-This is a space-time block coding based on the MIMO_OFDM Communication System Simulation and Design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 9216 |
Author:王国伟 |
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Description: 这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。
-This is a space-time block coding based on the MIMO_OFDM communication system simulation design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 14336 |
Author:樊同亮 |
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Description: 这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。-This is a space-time block codes based on the MIMO_OFDM Communication System Simulation and Design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 3072 |
Author:liuquanhang |
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Description: 这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。
此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训练符号的信道估计等通信模块。
- This is a space-time block coding based on the MIMO_OFDM Communication System Simulation and Design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 3072 |
Author:dalong |
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Description: 一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训
练符号的信道估计等通信模块。-A space-time block coding based on the MIMO_OFDM communication system simulation design. This system consists of QPSK modulation and demodulation, IFFT modulation, space-time coding and decoding, based on training symbols such as communication channel estimation module. Platform: |
Size: 12288 |
Author:andy |
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Description: This contribution considers semi-blind adaptive equalization for communication systems that employ high-throughput quadrature
amplitude modulation signalling. A minimum number of training symbols, approximately equal to the dimension
of the equalizer, are first utilized to provide a rough initial least-squares estimate of the equalizer’s weight vector. A
novel gradient-Newton concurrent constant modulus algorithm and soft decision-directed scheme are then applied to adapt
the equalizer. The proposed semi-blind adaptive algorithm is capable of converging fast and accurately to the optimal
minimum mean-square error equalization solution. Simulation results obtained demonstrate that the convergence speed of this
semi-blind adaptive algorithm is close to that of the training-based recursive least-square algorithm Platform: |
Size: 185344 |
Author:yh |
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Description: Abstract—In this paper, we study the joint estimation of inphase
and quadrature-phase (I/Q) imbalance, carrier frequency
offset (CFO), and channel response for multiple-input multipleoutput
(MIMO) orthogonal frequency division multiplexing
(OFDM) systems using training sequences. A new concept called
channel residual energy (CRE) is introduced. We show that by
minimizing the CRE, we can jointly estimate the I/Q imbalance
and CFO without knowing the channel response. The proposed
method needs only one OFDM block for training and the training
symbols can be arbitrary. Moreover when the training block
consists of two repeated sequences, a low complexity two-step
approach is proposed to solve the joint estimation problem.
Simulation results show that the mean-squared error (MSE) of
the proposed method is close to the Cramer-Rao bound (CRB).
Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel
estimation. Platform: |
Size: 551936 |
Author:santhu |
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Description: Abstract—In this paper, we study the joint estimation of inphase
and quadrature-phase (I/Q) imbalance, carrier frequency
offset (CFO), and channel response for multiple-input multipleoutput
(MIMO) orthogonal frequency division multiplexing
(OFDM) systems using training sequences. A new concept called
channel residual energy (CRE) is introduced. We show that by
minimizing the CRE, we can jointly estimate the I/Q imbalance
and CFO without knowing the channel response. The proposed
method needs only one OFDM block for training and the training
symbols can be arbitrary. Moreover when the training block
consists of two repeated sequences, a low complexity two-step
approach is proposed to solve the joint estimation problem.
Simulation results show that the mean-squared error (MSE) of
the proposed method is close to the Cramer-Rao bound (CRB).
Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel
estimation. Platform: |
Size: 277504 |
Author:santhu |
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Description: 这是一个在瑞利信道下，用训练符号进行信道估计的OFDM调制解调程序-This is a in Rayleigh fading, the training symbols to estimate the channel OFDM modulation and demodulation process Platform: |
Size: 9216 |
Author:田文杰 |
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Description: 在 OFDM 数学原理和收发模型的基础上，本文对帧同步、定时同步、频率同
步和采样同步给 OFDM 系统所产生的影响进行了理论分析，同时讨论了基于循环
前缀或训练符号的典型 OFDM 同步算法。参考 802.11a 突发数据帧结构和系统参
数，分析几种 OFDM 同步算法用于突发分组传输的性能；在分析了几种经典的信
道估计算法基础上,通过对复杂度和性能的折衷，选择一种适合本文系统的估计
算法。最后作者提出一种改进型 LS 信道估计算法，该算法考虑了 LS 算法中噪声
的影响，从而提高了低信噪比下信道估计的精度。仿真结果表明，改进算法在低
信噪比下具有良好的性能。
-OFDM mathematical principles and transceiver model based on frame synchronization, timing synchronization, frequency synchronization and sampling synchronization to the OFDM system, the impact of the theoretical analysis are also discussed based on the cyclic prefix or training symbols typical OFDM synchronization algorithm . Reference 802.11a burst data frame structure and system parameters, analyze several OFDM synchronization algorithm for burst packet transmission performance several classic channel estimation algorithm based on a compromise between complexity and performance, select a suitable estimation algorithm in this article. Finally, the author proposed a modified LS channel estimation algorithm that takes into account the effects of noise in the LS algorithm, thus improving the low SNR channel estimation accuracy. Simulation results show that the improved algorithm has good performance in low signal-to-noise ratio. Platform: |
Size: 8734720 |
Author:刘金强 |
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Description: ofdm程序4QAM调制。 子载波数 128
位数/ 符号 2
符号数/ 载波 1000
训练符号数 0
循环前缀长度 8
调制方式 4-QAM
多径信道数 3
IFFT Size 128
信道最大时延 2-ofdm program 4QAM modulation. Subcarriers median number of 128 /2 Symbol Symbol/carrier cyclic prefix length of the number of training symbols of 1000 0 8 modulation mode 4-QAM multi-path channel number 3 the IFFT Size 128 channel maximum delay Platform: |
Size: 2048 |
Author:xiaoxi |
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Description: 采用前导结构进行分组检测，利用前导中短训练符号的周期性，该方法又称为延时和相关算法。-The use of pre-division structure detection, the use of lead in the cyclical nature of short training symbols, the method is also known as the delay and related algorithms. Platform: |
Size: 2048 |
Author:冬暖夏凉 |
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Search - training symbols