GPS单点定位

本文分析了多级维纳滤波器的特性，在加性噪声和二维天线阵列如均匀圆阵、均匀面阵、十字阵等条件和背景下，对信源个数和信源参数估计问题进行了研究，提出了基于多级维纳滤波器前向分解特性的快速参数估计方法，同时提出了基于多级维纳滤波器的二维ESPRIT参数估计方法，该类方法无需协方差矩阵的估计运算及分解运算，计算复杂度较低。另外，还提出了对信源个数的估计算法。(This paper analyzes the characteristics of multistage Wiener filter, in the additive noise and the two-dimensional antenna array such as a uniform circular array, the uniform array, cross array conditions and background, the source number and source parameter estimation problem undertook study, put forward based on Multistage Wiener filter prior to the decomposition characteristics of fast parameter estimation method, at the same time based on Multistage Wiener filter 2D ESPRIT parameter estimation method, the method does not need to estimate of covariance matrix calculation and decomposition, relatively low computational complexity. In addition, also put forward for source number estimation algorithm.)

使用LS算法对OFDM的信道进行估计，该算法估计行道计算量小，但是容易受到噪声的影响。(The OFDM algorithm is used to estimate the channel of OFDM. The algorithm estimates that the calculation amount of the road is small, but is susceptible to noise.)

OFDM系统包括OFDM系统的调制解调，IFFT及FFT变换，保护间隔的加入对系统性能的改善，以及多径干扰、高速移动对系统误码率的影响。(The OFDM system includes modulation and demodulation of the OFDM system, IFFT and FFT transformation, the improvement of the protection interval to the system performance, and the influence of multipath interference and high-speed mobile on the system BER.)

本文件包含通信所有过程，从调制，扩频，发送到接收，经过解扩，解调等。其中信道可以随机产生时变的多径信道。()

GPS跟踪模块的载波跟踪环的仿真程序，可以成功的仿真载波跟踪的过程。(GPS tracking module carrier tracking loop of the simulation program can be a successful simulation of carrier tracking process.)

dtmf signaling source code using matlab

使用household进行QR分解，解方程(QR decomposition using household to solve equation)

取系统内置GPS数据源码，例程程序创建LatLongFactory对象取系统内置GPS数据。(Take built-in GPS system data source , the routine creates LatLongFactory objects get built-in GPS system data .)

说明：  采用人工势场法实现从起点到目标点的运动，并且正确躲避障碍物。(Artificial potential field method is used to realize the movement from the starting point to the target point, and to avoid obstacles correctly.)

说明：  多径参数干扰下的ofdm系统的matlab仿真代码，可供学习(Matlab simulation code of OFDM system under multipath parameter interference can be learned)