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This project aim was to build wireless software modem for data communication
between two computers using an acoustic interface in the voice frequency range (20Hz–
20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz –
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Robust Frequency and Timing Synchronization for OFDM. IEEE Journal
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这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模块，并统括系统性能的仿真验证了系统设计的可靠性。
-This is a relatively complete simulation of OFDM communication system design, including coding, modulation, IFFT, the upper and lower frequency, Gaussi
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完美的ofdm系统matlab仿真程序，从编解码到加入信道到调制解调到信道均衡到同步和频偏估计，带有详细的程序说明-Matlab simulation ofdm system the perfect program to join from the codec to the modem channel to channel equalization to the synchronization and frequency offset estimation, with a detailed de
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描述了OFDM调制解调中的频率同步的算法的方法和相应的代码-Describe the method of frequency synchronization in OFDM modulation and demodulation algorithm and the corresponding code
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In this paper, we present and analyze efficient frame synchronization and frequency offset compensation scheme with ternary sequences for an orthogonal frequency division multiplexing (OFDM) system in Rayleigh fading channels. Frame
synchronization
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Robust Frequency and Timing Synchronization for OFDM.pdf
OFDM系统一种经典的定时和频偏估计算法。
A very classical timing and frequency estimate algorithm。
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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
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A Novel Time and Frequency Synchronization Scheme for OFDM Systems
A new training symbol is designed and a novel
time and frequency synchronization scheme for orthogonal frequency division multiplexing systems is proposed. The time synchroniza
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Time and Frequency Synchronization Techniques for
OFDM Systems operating in Gaussian and Fading
Channels: A Tutorial
The aim of this paper is to survey and compare
previous methods for Data-aided timing and frequency
synchronization of O
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Synchronization in OFDM
With its robustness against multipath fading, orthogonal
frequency division multiplexing (OFDM) has become
the modulation of choice for many modern wireless standards.
However, OFDM is very sensitive to offsets in f
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OFDM is a multi-carrier transmission technique. It converts the frequency selective fading channel into a collection of parallel flat fading sub-channels which simplifies the structure of a receiver. OFDM has been widely used in communication system
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Frequency Synchronization in OFDM System
An accurate frequency synchronization method using the zadoff-chu (ZC) constant envelop preamble is analyzed, and a new preamble weighted by pseudo-noise sequence is used for orthogonal frequency division mu
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OFDM频率同步,可以作为初学者借鉴学习的-OFDM Frequency Synchronization
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ofdm 传输与接受的各项例子
-OFDM Receiver
1. Initalize the USRP setting the RX parameters and moving the LO outside the transmission band.
2. Generate random data bits (PN Sequence) (125 bits)
3. Use the Van De Beek algorithm to detect the cyclic prefix
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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.
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实现OFDM中符号的定时同步以及频偏估计(Timing synchronization and frequency offset estimation of symbols in OFDM)
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很好的OFDM系统载波同步算法，采用了长短训练序列分别进行小数倍频偏估计和整数倍频偏估计(This is a good carrier synchronization algorithm for OFDM system, using the long he short training sequences respectively to fractional frequency offset estimation and integer times frequency offset estima
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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
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Schmidl算法实现符号定时同步，和频偏估计。(Schmidl algorithm implements symbol timing synchronization and frequency offset estimation.)
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