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: 如果对通信系统的同步或者频偏感兴趣的话，这将是一个很好的学习代码，我花了很长时间写的-Communication system synchronization or frequency offset of interest, this will be a good learning code, I spent a long time to write Platform: |
Size: 519168 |
Author:闫城 |
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Description: 基于线性回归的UWB系统频偏估计算法Based on the linear regression of the UWB system frequency offset estimation algorithm-Based on the linear regression of the UWB system frequency offset estimation algorithm Platform: |
Size: 420864 |
Author:ww2012 |
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Description: 频率同步是宽带OFDM系统中的关键技术，IEEE 802.11a 采用OFDM技术，利用其前导序列的重复结构，提出了一种分步的粗细频偏捕获与校正算法，同时为了补偿时域同步后的残余相差和适应信道的时变特性，还提出了一种基于频域导频的相位跟踪方案-Frequency synchronization is a key technology in the broadband OFDM systems, IEEE 802.11a uses OFDM technology, the use of the repetitive structure of the leader sequence, the thickness of a step frequency offset capture and correction algorithm, when the order to compensate at the same time domain synchronous residualthe difference between and adapt to the time-varying characteristics of the channel is also proposed based on frequency domain pilot phase tracking scheme Platform: |
Size: 858112 |
Author:Chaos |
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Description: 这是一个很好的频偏估计算法的程序，我自己写的，可以对初学者有很大的帮助-
中文(简体)英语日语
This is a good frequency offset estimation algorithm of the program, I wrote it myself, can be of great help for beginners Platform: |
Size: 532480 |
Author:闫城 |
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Description: AFC信道参数估计，实验结果是估计衰落系数和频率偏移-AFC channel parameter estimation, the experimental results is to estimate the fading coefficients and the frequency offset Platform: |
Size: 1024 |
Author:andy |
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Description: 包含OFDM系统所有模块，采用高斯信道，可调整频偏，采用32QAM调制方式-Contains all modules of the OFDM system, using the Gaussian channel, adjustable frequency offset, the use of 32QAM modulation mode Platform: |
Size: 141312 |
Author:lulu |
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Description: 这是一个好用的频偏估计算法的mmatlab仿真程序，谢谢使用。
-This is an easy to use Frequency Offset Estimation Algorithm mmatlab simulation program, and thank you to use. Platform: |
Size: 230400 |
Author: |
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Description: 对单脉冲采集的k空间数据进行分析,计算中心频率偏移值-K-space data collected by the single pulse, calculate the center frequency offset value Platform: |
Size: 1024 |
Author:wx |
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Description: 802.11a OFDM MATLAB仿真代码，包含OFDM映射，IDFFT/DFT，同步(时间/频率同步)与信道估计，和频率偏移的估计等一系列代码
-802.11a OFDM MATLAB simulation code, including the OFDM mapping IDFFT/DFT synchronization (time/frequency synchronization) and the channel estimation and frequency offset estimation a series of code Platform: |
Size: 26624 |
Author:tiebos |
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Description: 针对通信侦查课题，通过已知先验知识和截获信号，进行找出同步序列，匹配滤波，校正频偏和相偏，均衡，解交织，译码，恢复出原序列，最终得到的序列与原序列作对比得到误码率为0-Investigation subject for the communication, by known a priori knowledge and intercepted signal conducted to identify the synchronization sequence, the matched filter, correcting frequency offset, and phase deviations, balanced, deinterleaving, decoding, to recover the original sequence, the resulting sequence with the original sequence compared error rate is 0 Platform: |
Size: 12266496 |
Author:hezhuzhen |
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Description: 根据软件无线电的思想，提出了一种新颖的数字信号处理算法，对QPSK信号的相位进行数字化处理，从而实现对QPSK信号的解调.该算法允许收发两端载波存在频差，用数字锁相实现收发端载波的同步，在频偏较大的情况下，估算频偏的大小，自适应设置环路的带宽，实现较短的捕获时间和较好的信噪性能。整个设计基于XILINX公司的ISE开发平台，并用Virtex-II系列FPGA实现。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、扰干扰能力强的特点，符合未来通信技术发展的方向。-According to the idea of software radio, a novel digital signal processing algorithm, the phase of QPSK digital signal processing, enabling the demodulation of QPSK signals. This algorithm allows the sending and receiving ends of the carrier frequency difference exists, using digital phase-locked to achieve synchronization of sending and receiving end of the carrier, in the case of large frequency offset, frequency offset estimation of the size, adaptive set the loop bandwidth to achieve shorter acquisition time and better noise performance. The whole design is based on the company XILINX ISE development platform, and Virtex-II series with the FPGA. FPGA realization of a modem with a small size, low power consumption, high integration, software upgrades available, the characteristics of strong interference interference, in line with the future direction of ICT development. Platform: |
Size: 64512 |
Author:马文 |
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Description: COFDM系统的信道估计仿真。支持梳妆导频、块状导频、多种差值算法和估计算法，同时可进行同步和频偏估计，功能很全。-The COFDM system of channel estimation simulation. Support dressing pilot to the massive pilot, the the difference algorithm estimation algorithm, synchronization and frequency offset estimation, very full functionality. Platform: |
Size: 46080 |
Author:齐飞 |
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Description: OFDM 同步技术研究 Schmidl_Cox算法 定时估计加频偏估计 matlab程序-The the OFDM synchronization technology research Schmidl_Cox algorithm timing and frequency offset estimation matlab program is estimated Platform: |
Size: 2048 |
Author:lacus |
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Description: This demo models the effects of adjacent and co-channel interference on a PSK modulated signal. The model includes two interferers, Interferer 1 and Interferer 2. The model enables you to modify the frequency offset and the power gain of each interferer, and view the effects on a spectrum plot.
Platform: |
Size: 13312 |
Author:RRaji |
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Description: CFO- carrier frequency offset matlab code for cooperative communication. This code helps you to find the co - sfbc - ofdm. Platform: |
Size: 2048 |
Author:vihar |
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Search - frequency offset