fdtd3D wire antenna

正交频分复用(OFDM)技术是一种可以有效对抗符号间干扰(ISI)的高速数据传输技术。OFDM是一种特殊的多载波调制方式，它的基本思想是将高速传输的数据流通过串/并转换，变成在若干个正交的窄带子信道上并行传输的低速数据流。OFDM接收机有三个关键技术：信道估计技术，降低峰均比(PAPR)技术和同步技术。OFDM技术能有效的对抗多径衰落等，有着诸多的优点，但是OFDM有一个发展瓶颈，即OFDM信号的峰均功率比很大，很容易导致OFDM信号的交调失真和系统性能的下降。因而如何降低OFDM信号的峰均功率比一直是OFDM技术的一个研究热点问题。论文针对上述问题，重点研究了降低OFDM信号的峰均功率比的SLM与PTS算法，并利用Matlab对算法进行了仿真研究，并对仿真结果进行了分析。(Orthogonal frequency division multiplexing (OFDM) is a high-speed data transmission technology that can effectively combat inter-symbol interference (ISI). OFDM is a special multi-carrier modulation method, its basic idea is to high-speed transmission of data stream through the serial/parallel conversion, in a number of orthogonal narrowband sub-channel parallel transmission of low-speed data stream. OFDM receivers have three key technologies: channel estimation techniques, reduced peak-to-average ratio (PAPR) techniques and synchronization techniques. OFDM technology can effectively combat multipath fading, etc., there are many advantages, but OFDM has a bottleneck in development, that is, OFDM signal peak power ratio is large, it is easy to lead to OFDM signal intermodulation distortion and system performance degradation. Therefore, how to reduce the peak-to-average power ratio of OFDM signal has been a hot topic in OFDM technology. In this paper, the SLM and PTS algorithms for reduc)

核独立主元分析(KICA算法)在模式识别、过程监测、故障诊断等不同领域的应用中都表现了很好的性能。(Kernel independent principal component analysis (KICA algorithm) has shown good performance in pattern recognition, process monitoring, fault diagnosis and other fields.)

合成孔径雷达成像算法仿真，即一些雷达仿真算法实现(the synthetic aperture radar imaging algorithms)

说明：  OFDM的信道估计，LS,MMSE,非常全的仿真程序(OFDM channel estimation, LS, MMSE, very complete simulation program)

LFM信号，通过IQ解调，再A/D变换，上变频，分析输出信号频谱(LFM signal, through the IQ demodulation, and then A/D conversion, on the frequency, the output signal spectrum analysis)

图像中值滤波，利用中值滤波和低通滤波进行比较，分析PSNR，得出性能差别(image filtering, using median filter and a low-pass filter, PSNR analysis, the performance differences come)

squrt prediction error and data base of waste paper plant and spe limit

语音处理的短时时域处理技术中的短时中值滤波(voice when dealing with the short-time domain processing technology of short-term median filtering)

EMD算法的完整Matlab程序，包含了多种形式的EMD算法。(EMD algorithm integrity Matlab procedures, including various forms of EMD algorithm.)

模糊控制的PID控制模型，一共由两部分组成，分别是模型和m函数。经过多次修正，控制效果很好。(PID control fuzzy control model, consists of two parts, respectively is the model and m function. After several revisions, the control effect is very good.)