doa_focuss

This code shows how one can apply Method of Moment technique to EM problems.

本程序是LM方法实现的主程序，并且本程序通过了LMFnlsq2test.rar程序的测试，证明了程序的正确性和有效性。顺便说下，上面的LMFnlsq2test.rar里面的程序是一个测试程序，它的描述写错了。(This LM method is the main program, the program and the program passed LMFnlsq2test. Rar program test, proves the correctness and effectiveness of the program.. By the way, the above LMFnlsq2test rar program is a test program, a description of the write it wrong.)

dct precoded SLM method for PAPR reduction High Peak to Average Power Ratio (PAPR) is still a most important challenge in Orthogonal Frequency Division Multiplexing (OFDM) system. In this paper, we propose a Discrete Cosine Transform (DCT) precoding based SLM technique for PAPR reduction in OFDM systems. This technique is based on precoding the constellation symbols with DCT precoder after the multiplication of phase rotation factor and before the Inverse Fast Fourier Transform (IFFT) in SLM-OFDM System.

雷达手册 做雷达信号处理的可以参考 美国 merrill i.skoinik 著(radar handbook)

说明：  SVPWM是近年发展的一种比较新颖的控制方法，是由三相功率逆变器的六个功率开关元件组成的特定开关模式产生的脉宽调制波，能够使输出电流波形尽可能接近于理想的正弦波形。空间电压矢量PWM与传统的正弦PWM不同，它是从三相输出电压的整体效果出发，着眼于如何使电机获得理想圆形磁链轨迹。SVPWM技术与SPWM相比较，绕组电流波形的谐波成分小，使得电机转矩脉动降低，旋转磁场更逼近圆形，而且使直流母线电压的利用率有了很大提高，且更易于实现数字化。(SVPWM is a novel control method developed in recent years. It is a pulse width modulation wave generated by a specific switching mode consisting of six power switching elements of three-phase power inverters, which can make the output current waveform as close as possible to the ideal sinusoidal waveform. Space voltage vector PWM is different from traditional sinusoidal PWM. It is based on the overall effect of three-phase output voltage, focusing on how to obtain the ideal circular flux trajectory of the motor. Compared with SPWM, the harmonic component of winding current waveform is smaller, which reduces the torque ripple of motor, makes the rotating magnetic field more close to the circle, and improves the utilization ratio of DC bus voltage greatly, and makes it easier to realize digitization.)

matlab CDMA扩频通信以及RAKE接收机仿真测试代码(matlab CDMA spread spectrum communication, as well as simulation test code RAKE receiver)

通过matlab中的gui功能实现的史密斯圆图的匹配等功能的操作界面(Gui in matlab functions through the implementation of the Smith chart of the matching function interface)

在Matlab下，实现大地坐标之间互相转换。(In Matlab, to achieve mutual conversion between geodetic coordinates.)

说明：  用于非平稳、线性信号的信号分离，可用于公董轴承故障研究。经测试降噪能力优越(It can be used for the signal separation of non-stationary and linear signals, and can be used for the fault research of common bearing. Superior noise reduction capability after test)

铁电存储器MFIS-FET结构开态电流和关态电流的描述(FRAM MFIS-FET structure of open state current and off current description)