GPS L1信号的仿真及信号的捕获L1acq-reciever

多元ldpc编译码matlap程序，采用bp译码算法(Multiple LDPC coding and decoding)

传统的高分辨波达方向（DOA）估计算法中，一般都假设信号位于远场，此时入射到阵列的信源波前为平面波前，空间信号的定位参数可由DOA来确定。然而，当信源处于阵列的Fresnel区域时，信号波前需用球面波来描述，每个信源的定位信息要用DOA和距离联合描述。因此，远场情况下的一些线性理论推导已不再成立，传统的远场算法的估计不再适用(In traditional high resolution direction of arrival (DOA) estimation algorithms, it is generally assumed that the signal is located in the far field, where the source wavefront incident to the array is plane wavefront, and the location parameters of the spatial signal can be determined by DOA. However, when the source is in the Fresnel region of the array, the wavefront of the signal needs to be described by spherical wave, and the location information of each source needs to be described by DOA and distance. Therefore, some linear theoretical deductions are no longer valid in the far-field case, and the estimation of the traditional far-field algorithm is no longer applicable.)

脑电（EEG）是一种反映大脑活动的生物电信号，由于它具有很高的时变敏感性，在采集时极易受到外界的干扰。如眼球运动、眨眼、心电、肌电等都会给真实的脑电信号加入噪声（伪迹）。这些噪声给脑电信号的分析处理带来了很大的困难。从剔除EEG中的各种伪迹到去除噪声的效果评估研究者们都提出了很多方法。本文提出matlab除各种脑电信号伪伪迹减法( As a kind of physiological signals, the Electroencephalogram（EEG）represents the electrical activity of the brain. Because of its higher time-vary sensitivity, EEG is susceptible to many artifacts, such as eye-movements, blinks, cardiac signals, muscle noise. These noises in recording Electroencephalogram（EEG）pose a major embarrassment for EEG interpretation and disposal. A number of methods have been proposed to overcome this problem, ranging from the rejection of various artifacts to the effect estimate of removing artifacts. )

改进的帧间差法运动目标追踪算法,比以前的经典算法有改善，不会出现边框锁定到边远的情况(Improved inter-frame difference method moving target tracking algorithm)

说明：  在线序列ELM （Online Sequential ELM，OS-ELM）是可以使用实时数据进行学习并更新输出权重的ELM算法。(Online sequential elm (OS-ELM) is an elm algorithm that can use real-time data to learn and update output weights.)

空间直角坐标（XYZ）转换为大地坐标（BLH）matlab函数((Space Cartesian coordinates (XYZ) and geodetic coordinates (BLH) conversion matlab function))

IDEA encryption algorithm

说明：  GPS 单系统单频伪距静态 单点定位 CEP95 2.9(Single point positioning)

实现通信系统的数字模拟混合预编码，进行干扰抑制，提高系统性能，降低硬件复杂度和实现成本(The digital analog hybrid precoding of the communication system is realized, the interference suppression, the performance of the system, the complexity of hardware and the cost of realizing the system are reduced.)

关于通信系统的simulink仿真，包括基本介绍，数字信号传输，信道编码，OFDM方式，MIMO系统仿真(On the communication system simulink simulation, including a basic introduction to digital signal transmission, channel coding, OFDM mode, MIMO system simulation)