Description: fitz 及 lr fr 频偏估计 matlab函数 可直接应用 并附有简单的主程序-fitz and lr fr frequency offset estimation matlab function can be applied directly with a simple main program Platform: |
Size: 2048 |
Author:隋文宇 |
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Description: A semi blind technique for estimating the carrier frequency offset in OFDM communication systems is presented in this
paper. The fractional and integer frequency offsets are esti-mated by employing a few null subcarriers in the rst OFDM
symbol in a frame. While the conventional null subcarrier based methods estimate the offset by a single global search, the
proposed method employs a two stage estimator, which greatly minimize the computational complexity. ,A semi blind technique for estimating the carrier frequency offset in OFDM communication systems is presented in this
paper. The fractional and integer frequency offsets are esti-mated by employing a few null subcarriers in the rst OFDM
symbol in a frame. While the conventional null subcarrier based methods estimate the offset by a single global search, the
proposed method employs a two stage estimator, which greatly minimize the computational complexity. Platform: |
Size: 2293760 |
Author:Mohd Elsoufi |
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Description: OFDM对频偏比较敏感，提出了基于循环前缀的频偏估计方法-OFDM is relatively sensitive to frequency offset, frequency offset estimation method is proposed based on cyclic prefix. Platform: |
Size: 1024 |
Author:gaoanqin |
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Description: OFDM 对频偏非常敏感，文件主要是基于导频方法的频偏估计-OFDM is very sensitive to frequency offset, frequency offset file is mainly based on the pilot estimates Platform: |
Size: 1024 |
Author:gaoanqin |
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Description: 该文给出了一种QAM信号载波频偏估计算法。-This paper presents a QAM signal carrier frequency offset estimation algorithm. Platform: |
Size: 223232 |
Author:冯浩 |
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Description: 数字通信中的多普勒频偏估计技术研究，采用开环大频偏估计算法，调制是4/pi_DQPSK-Doppler shift estimation in digital communications technology, the use of open-loop large frequency offset estimation algorithms, modulation is 4/pi_DQPSK Platform: |
Size: 2048 |
Author:梁涛 |
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Description: 首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。-First of all, according to the characteristics of the short training word correlation calculation of the signal reaching the detector, when the detected correlation value is greater than the threshold of a certain frequency and that a signal arrives. Then, the correlation calculation according to the characteristics of the long training word, the initial estimate of the location of the OFDM symbol FFT window. The estimated position of the FFT window, the first small frequency offset estimation in the time domain, the small frequency offset compensation, the two long training word FFT operation integer frequency offset estimate, according to the result of the FFT operation. After the completion of these parameter estimates, data demodulation. The complete frequency offset compensation, and then based on the estimated FFT window position for the FFT operation to obtain a frequency domain data, demodulates the first data part. Then in a position corresponding to the pilot subcarriers extr Platform: |
Size: 124928 |
Author:章田 |
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Description: KEY FEATURES
Resolution of 230,000 Counts (Peak-to-Peak)
Offset Drift: 5 nV/8C
Gain Drift: 2 ppm/8C
Line Frequency Rejection: >150 dB
Buffered Differential Inputs
Specified for Drift Over Time
Operates with Reference Voltages of 1 V to 5 V
ADDITIONAL FEATURES
Two-Channel Programmable Gain Front End
On-Chip DAC for Offset/TARE Platform: |
Size: 11264 |
Author:mado6262 |
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Description: 频率偏移估计，对初学者有很大帮助.请有用的欢迎下载-Frequency offset estimation of great help for beginners. Useful welcome to download Platform: |
Size: 1024 |
Author:沉月恋 |
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Description: 频率偏移估计，对初学者有很大帮助.请有用的欢迎下载-Frequency offset estimation of great help for beginners. Useful welcome to download Platform: |
Size: 1024 |
Author:沉月恋 |
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Description: TolPac=1 输入数据块数
PacketLen=10 每块的符号数目
M=64 调制指数
SNR=20
NFFT=256 Length of IFFTCpLength=16 Length of Prefix NSubc=64 Number of subcarriers freoff=0.5 归一化频偏2.25,phaseoff=0.1 -TolPac = 1 input data blocks the the PACKETLEN 10 of the span per block, the number of symbols M = 64 modulation index SNR = 20 NFFT = 256 the length of IFFTCpLength = 16 Length of Prefix NSubc = 64 Number of subcarriers freoff = 0.5 the normalization frequency offset 2.25 phaseoff = 0.1 Platform: |
Size: 2048 |
Author:xiaoxi |
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Description: 一种新的符号定时和载波频率同步算法,该算法将OFDM符号分成几部分。它使用相关性和积累在几个OFDM
符号获得估计函数。当部分的长度小于ISI自由地区,该算法可以识别它。然后估计的最优符号定时和载波频率偏移可以获得。计算机仿真结果表明,该算法不仅可以跟踪时变信道变化但也有较小的MSE比ML估计算法。-A new symbol timing and carrier frequency synchronization algorithm is presented and the algorithm divides the OFDM symbol into several parts. It uses correlation and accumulation in several OFDM
symbols to acquire estimation function. When the length of part is smaller than that of ISI free region , the algorithm can distinguish it. Then the estimation of optimal symbol timing and carrier frequency offset can be acquired .The computer simulation results show that the proposed algorithm not only can track time varying channel change but also has smaller MSE than that of ML
estimation algorithm. Platform: |
Size: 276480 |
Author:wujueying |
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Description: 该程序主要实现CHIRP信号频偏估计中的频偏对通信系统的影响描述，由于频偏，使得匹配后的脉冲偏移参考点。-The program mainly realize the CHIRP signal frequency estimation of frequency deviation effect on communication system, due to the frequency offset, so that when the matching of the pulse offset reference point.
Platform: |
Size: 1024 |
Author:HQ |
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Search - frequency offset