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[Software Engineering] DesignandDSPrealizationofan0FDMreceiver DL : 0: 设计了一个OFDM接收机，并采用1fI公司的TMS320C6416芯片进行实现。在假设理想同步的前提下，该系统进行了FFT变化、使用了Ls(最小二乘法)进行信道估计，并且采用了 QPSK算法进行解调。最后将接收机输出数据与发端数据进行比较，在不同信噪比情况下计算其误码率，得出了比较理想的结果。-An OFDM receiver is designed in山is paper and realized on the platform of the 1MS32OC6416 chip of the TI company．Under the assumption of ideal synchronization．n叩transformation is realized in the system wit}l LS method implemented in the channel estimation module and QPSK used in the demodulation module． Finally，BER is calculated in different cases of SNR and the result is achieved as expected．
Date : 2025-12-31 Size : 238kb User : 王熹
[Software Engineering] on-the-modulation-technology-in-OFDM DL : 0: 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.
Date : 2025-12-31 Size : 8.33mb User : 刘金强
[Software Engineering] diversity-high-SNR DL : 0: Diversity at high SNR OFDM program
Date : 2025-12-31 Size : 1kb User : Aws
[Software Engineering] fiu-V6.6 DL : 0: 包含位置式PID算法、积分分离式PID，最大信噪比的独立分量分析算法，ofdm系统仿真含16qam调制 fft 加窗加cp等模块。- It contains positional PID algorithm, integral separate PID, SNR largest independent component analysis algorithm, ofdm system simulation including 16qam modulation fft windowing modules plus cp.
Date : 2025-12-31 Size : 4kb User : 江兴维