sheji

本仿真采用dq原理检测谐波,采用PI闭环控制策略(This simulation uses DQ principle to detect harmonic, and adopts PI closed-loop control strategy)

说明：  本程序用matlab编写，给出了特定参数下，光纤掺杂深度与阈值之间的关系(pumping threshold vs adoping density)

This M Code simulate the effects of clipping and filtering on PAPR PAPR reduction in OFDM-based wireless standard.Also the performance of BER versus SNR of original OFDM signals with PAPR reduction based on clipping and filtering schemes over AWGN channel is evaluated. The simplest and most widely used technique of PAPR reduction is to basically clip the part of signals that are outside the allowed region.Clipping methode introduces both in band distortion and out of band radiation into OFDM signals which degrades the performance including the BER and spectral efficiency.Filtering can reduce out of band radiation after clipping although it can not reduce in-band radiation distortion.However, clipping may cause some peak regrowth so that the signal after clipping and filtering will exceed the clipping level at some point.To reduce peak regrowth a repeated filtering and clipping operation can be used to obtain a desirable PAPR at a cost of computational complexity increase.

50kW，380V，50HZ的负荷通过AC-DC-AC变换器连接到25kV，60Hz电网上。该电源由两个电压源型变换器和一个直流电容构成。(A 50 kW, 380 V, 50 Hz load is connected to a 25 kV, 60 Hz grid through a AC-DC-AC power supply. This power supply consists of two voltage source converters, VSC1 and VSC2, connected through a DC link.)

背景检测,使方法更加的优化了，更容易接受学习，使读者容易接受(background detection)

专家PID控制的matlab例程，主要包括开环，PI控制等方式(Expert matlab control of the PID routines, including open loop, PI control, etc.)

matlab 经典算法 规划问题讲义及例题(classical algorithm matlab planning notes and Example)

一份FDAtool使用、参数设置较详细的资料( FDATOOL)

cognitive radio system matlab simulation

APFC电路，利用市电220V,将Boost电路的功率因数提高，仿真了电流电压波形(APFC circuit)