DOA_2

this is a paper for pcf beam splitter!

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.)

在D2D模型中使用图着色方法进行仿真的程序(Programs that use the graph coloring method for simulation in the D2D model)

加拿大人发表的关于周跳探测,实现了实时的双频周跳探测和修复(cycle-slipsfromCanada)

适用于MATLAB画三维彩图，可用于画多参数平面图。(It can be used for drawing three-dimensional pictures and multi parametric graphs with MATLAB.)

织带机监测系统的上位机软件。RS-485总线，类MODBUS协议。(Ribbon Machine Monitoring System for PC software. RS-485 bus, types of MODBUS protocol.)

PEGSIS协议仿真 包含很多东西 通讯协议仿真 可用于对比 MATKLAB(PEGASIS Protocol Simulation)

研究信道噪声对M-ary QAM的影响，适合数字通讯从业者(Effect of channel noise on M-ary QAM in)

数字调制-OFDM-QPSK-峰均比-资料,很好很详细，学习ofdm很好的资料(Digital Modulation-OFDM-QPSK-PAR- information, very very detailed, very good information to learn ofdm)

ldpc编码的matlab实现，供大家参考(Matlab implementation of LDPC coding for your reference)