gt_0.6.4

伺服电机控制，实现对伺服电机的控制，含有GUI代码(Servo motor control)

GPS/INS导航经典图书附带的源码，对学习GPS和INS有很大的帮助，找了好久才找到的，相信许多人都需要(GPS/INS navigation classic books with source code, GPS and INS to learn a great help, looking for a long time to find, I believe that many people need)

说明：  数字信号QPSK调制，卷积编码，根升余弦滤波器，高斯信道。并画出误码率曲线。(Digital signal QPSK modulation, convolutional coding, root-up cosine filter, Gauss channel. The error rate curve is drawn.)

针对传统线性调频(LFM)信号参数估计算法中复杂的搜索和计算问题，提出了一种不需要参数搜索的快速 LFM信号参数估计算法。该算法先用希尔伯特变换估计LFM信号瞬时相位，再用二次相位函数拟合LFM信号瞬 时相位从而得到初始频率和调频斜率的估计(The traditional linear frequency modulation (LFM) signal parameter estimation algorithms and computational complexity of the search problem, we propose a fast search without LFM signal parameter estimation algorithm. The algorithm first estimated with the Hilbert transform of LFM signal instantaneous phase, and then the second phase of LFM signal instantaneous phase function fitting to obtain the initial estimates of the frequency and chirp rate)

Matlab高斯信道条件下采用QPSK和8PSK时点到点通信系统的理论和统计所得的误码率和误比特率曲线。 删余卷积码的Pb性能仿真 加入信道编码模块，绘制误比特率曲线,其中信道为加性高斯白噪声，调试为QPSK； 进行软判决和应判决，和用3/4、7/8删余码进行编码等。(Matlab gaussian channel conditions using QPSK and eight PSK point to point communication system theory and statistical the error rate and bit error rate curve. Delete the convolution code more than Pb performance simulation Join channel coding module, draw bit error rate curve, which channel to additive gaussian white noise, commissioning for QPSK In the soft decision and judgment should be, and with more than 3/4, 7/8 delete code for coding, etc. )

说明：  仿真了ofdm的LS和MMSE的信道估计程序，并进行了比较，能调通运行(Ofdm simulation of the LS and MMSE channel estimation procedures, and compared to pass transfer operation)

水下扩频系统研究，本系统采用直接扩频序列方式，在有多径水声信道和无多径的水声信道进行研究比较(Underwater spread spectrum system, the system uses direct sequence spread-spectrum approach, in a number of Acoustic Channel Drive and non-multi-path acoustic channel for the study of comparative)

极化码的matlab实现，包括了完整的编码以及译码程序(polar coding and decoding)

matlab生成s曲线，类似PS中的曲线调整功能，可以动态的实现S曲线曲率的调整(Matlab generates s curve, similar to the curve adjustment function in PS, which can dynamically realize the adjustment of s curve curvature)

说明：  DPSK、QPSK、OQPSK Matlab设计实现(DPSK, QPSK, OQPSK Matlab Design and Implementation)