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boc信号的功率谱绘制程序，以及gps的bpsk信号的功率谱比较。(boc power spectrum drawing program, and the bpsk gps signal power spectrum comparison.)

说明：  数值仿真,关于切换设计的，有驻留时间，是控制领域的一个比较不错的仿真代码(numeral simuation min-switching with a dwell time constriant in control theory and appliaction)

叠加训练序列的最小二乘信道估计与最小均方误差均衡，QPSK调制，做了4次迭代估计的性能对比。(superimposed training, least squares (LS) channel estimation, MMSE equalizer, QPSK modulation, 4 times iteration.)

LDPC性能仿真(LDPC performance simulation)

说明：  基于接收信号强度的KNN室内定位算法，还有测试数据。适合初学者参考(KNN indoor positioning algorithm based on the received signal strength, as well as test data. For beginners)

自己写的均匀圆阵，矩形阵的方向图 画法。大家共享！(himself wrote of a uniform circular array, the array of rectangular picture in the direction of France. Share!)

将patran中的模型的bdf文件中的单元信息和节点信息保存成txt文档，在matlab中调用，直接输出为vabs的前处理文件(Save the unit information and node information in the BDF file of the Patran into TXT document, call it in MATLAB and output it directly to the pretreatment file of vabs.)

对舰船目标回波信号进行分析，并对信号进行多普勒频移，脉冲展宽等研究，最终构建回波信号(The echo signal of ship target is analyzed, and the Doppler frequency shift and pulse broadening are studied. Finally, the echo signal is constructed.)

4FSK调制解调的matlab代码。采用相干解调的方式4FSK进行解调，与大多数方案的包络检波不同。基带信号用四种电平来表示，与调制信号相区分。(Demodulation matlab code 4FSK modulation. Coherent demodulation 4FSK demodulates Unlike most programs envelope detector,. The baseband signal is represented with four level distinguish phase with the modulation signal.)

实现2ASK、2FSK调制及两者的包络检波解调(Implementation of 2ASK, 2FSK modulation and envelope demodulation of both)