GPSreceiver

说明：  GPS中频信号频率和ca码搜索程序，原始数据可以在北京东方联星网站上下载(GPS IF signal frequency and ca code search procedures, raw data can be in Beijing Oriental Lianxing website)

全数字解调下16QAM信号的频偏估计的TD-GG算法实现。TD-GG算法是在TD和GG算法基础上提出来的，有较大的频偏估计范围和较好的估计精度，很好的解决了传统的非数据辅助频偏估计算法中估计范围和精度不能兼顾的问题，而且这种算法易于实现。(Digital demodulation under the 16QAM signal frequency estimation TD-GG algorithm. TD-GG algorithm is based on the TD and the GG algorithm is proposed, and have greater range and better frequency estimation of estimation accuracy, a good solution to the traditional non-data aided frequency offset estimation algorithm to estimate the range and accuracy not take into account the issue, and this algorithm is easy to achieve.)

针对高动态 环 境 下 突 发 信 号 检 测 问 题，提 出 基 于 高 阶 项 逐 级 消 去 的 非 线 性 调 频 （ｎｏｎ－ｌｉｎｅａｒ　ｆｒｅｑｕｅｎｃｙ ｍｏｄｕｌａｔｉｏｎ，ＮＬＦＭ）信号参数估计算法，利用合理近似，将其转化为相对简单的线性调频 （ｌｉｎｅａｒ　ｆｒｅｑｕｅｎｃｙ　ｍｏｄｕ－ ｌａｔｉｏｎ，ＬＦＭ）信号参数估计问题，并提出两级调频率逼近法用于ＬＦＭ 信号参数估计，具有原理简明、计算复杂度低 等特点，便于实际工程应用．(To detect burst signals in high dynamic environment, a non-linear frequency modulation (NLFM) based on high-order item elimination is proposed. Modulation (NLFM) signal parameter estimation algorithm, using reasonable approximation, is transformed into a relatively simple linear frequency modulation- The problem of LFM signal parameter estimation is discussed. A two-stage frequency modulation approximation method is proposed for LFM signal parameter estimation. It has simple principle and low computational complexity.)

First, when the inter-user distance d is small, the SNR for D2D communication is high, and hence there are sufficient number of bits for high quality CSI exchange.

Jakes提出了基于正弦波叠加法的Jakes仿真模型。Jakes仿真模型是一种确定模型，产生的信号非广义平稳且不具各态历经性，其二阶统计特性与Clarke参考模型也相差较大。(Jakes fading channel model)

克里金插值matlab源程序，采用高斯模型，简单有效。(Kriging interpolation matlab source code, the use of Gaussian models, simple and effective.)

OPTICAL COMMUNICATIONS MATLAB calls OptiSystem CO-OFDM.

matlab求解雷诺方程，里面的程序需要适当修改(matlab solving the Reynolds equation, which the program needs to be amended as appropriate)

MIMO系统线性检测算法误码率性能的脚本，包括MMSE, ZF，MF等。只需输入接受天线个数、发送天线个数即可。 (MIMO system bit error rate performance of linear detection algorithm script, including the MMSE, ZF, MF. Simply enter the number of receiving antennas, the number of transmit antennas.)

找出一个向量或者数组的所有子集，数组中所有向量的全部组合排列组成的子集(Find a subset of the array)