LBL-TDOA-distance measuring error simulation

说明：  930c patch lod001 lmwin

说明：  无人机dubins航路规划算法，matlab m语言编写(pathplannig algorithm for uavs)

为求解二层规划提供思路。提供一个样本可供参考(matlab optimization calculation linear programming nonlinear programming integer programming quadratic programming genetic optimization particle swarm optimization)

PS2键盘LCD显示控制器的vhdl代码，很难得(PS2LCDController vhdl code)

This document is to understand communication in a better way

永磁同步电机控制模型，使用滑膜PI控制，可供电机控制开发人员入门使用(mcu control for pmsm. used for suistanable energy vehicle simulation)

实现OFDM系统仿真，不过可能存在一些标点缺失，希望能有人指正-Achieve the OFDM system simulation, but there may be missing some punctuation, hoping someone correct me

说明：  leaflet examples, downloaded from the Internet, used for experiments

说明：  OFDM即正交频分复用技术，多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。(Orthogonal Frequency Division Multiplexing (OFDM) is a kind of multi-carrier modulation. The main idea is to divide the channel into several orthogonal sub-channels, convert high-speed data signals into parallel low-speed sub-data streams, and modulate them to transmit on each sub-channel. The signal bandwidth on each sub-channel is less than the correlation bandwidth of the channel, so it can be seen as flat fading on each sub-channel, which can eliminate inter-symbol interference. Moreover, since the bandwidth of each subchannel is only a small part of the original channel bandwidth, channel equalization becomes relatively easy.)

说明：  关于二维杆系受集中载荷的静力求解有限单元法代码(Finite element code for static solution of two-dimensional bar system under concentrated load)