cognitive radio

说明：  求解双层规划问题常用的算法有极点算法、直接搜索法、下降法和非数值优化方法(如模拟退火算法、遗传算法等)，遗传算法的求解思路是：首先对上层的决策变量编码，代人下层规划模型，通过求解下层模型的决策变量值，代入上层模型计算适应度值，然后进行交叉、变异、选择操作，最后求出最优解。(Solving Bilevel Programming Problems with pole algorithm commonly used algorithms, direct search method, descent and non-numerical optimization methods (such as simulated annealing, genetic algorithms, etc.), genetic algorithm for solving approaches: the first on the top of the decision variable coding, on behalf of the were lower programming model, by solving the lower model of decision variables values into the upper model on behalf of the fitness value, and then crossover and mutation, select Options, and finally get the best solution.)

说明：  关于Polar码的,编码和译码，适合初学者(something about polar code)

说明：  用于计算gps系统时间，gps周、周内秒,以及约化儒略日(Used to calculate GPS system time, GPS cycle, intra-week seconds, and Julian Day)

正交编码方面的文章Coded Orthogonal Signaling(1993)(Coded Orthogonal Signaling(1993))

说明：  td_scdma的完整程序，包括发送和接受两部分，涉及信道编解码，交织，扩频等(td_scdma complete process, including sending and receiving two parts, related to the channel encoding and decoding, interleaving, spreading, etc.)

esprit algorithm signal frequency interference can be assessed NRZ type differential phase modulation signal modeling and simulation analysis, About ultrasonic parking radar ranging.

说明：  简化实频技术，用于微波器件的宽带匹配的Matlab程序。(Simplified Real Frequency Technology)

GSM链路级仿真程序，按照基本GSM规范编写而成。(GSM link level simulation program, written in accordance with the basic GSM standard.)

提供了几种利用jakes模型建立瑞利信道的matlab代码。(Provides several jakes model building using Rayleigh channel matlab code.)

LDPC码不同迭代次数对比。码长512，码率1/2，迭代次数分别为0，5，10，50，100.(The LDPC codes different number of iterations contrast. Long code 512, code rate 1/2, the number of iterations were 0,5,10,50,100.)