dianji

说明：  仿真多种调制信号,包括AM FM PSK QAM等(Simulate a variety of modulation signals, including AM FM PSK QAM, etc)

TCM with BCJR (Log-Map) & channel Encoder Coded_Modulation

说明：  对三路单音信号合成模拟话音信号进行PCM编码，并采用BPSK调制，通过AWGN信道，接收端采用BPSK相干解调和PCM译码，恢复原模拟信号(PCM coding is used to synthesize analog voice signals from three monotone signals. BPSK modulation is used to restore the original analog signals through AWGN channel. BPSK coherent demodulation and PCM decoding are used at the receiving end.)

提取归一化中心矩——对平移和放缩有良好的不变性，我感觉比HU矩要简单可靠，请各位指正。qq254730570(Extraction of normalized central moments- on the Pan and zoom invariance good, I feel HU moment than to a simple and reliable, please correct me. qq254730570)

说明：  Suzuki信道仿真,用于多路径信道衰落 综合大尺度衰落和小尺度衰落 可用来仿真频率选择性衰落以及时间选择性衰落(Suzuki channel simulation, which is used to synthesize large-scale fading and small-scale fading in multipath channel. It can be used to simulate frequency-selective fading and time-selective fading.)

说明：  对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)

画图，点击画图按键画出图，点击橡皮擦修改，点击颜色选择修改画图颜色。(drawing saftware)

GPS/SINS松组合/紧组合MATLAB仿真验证代码(GPS/SINS loose /tight integration MATLAB simulation verification code)

体系相对导航系的角速度在体系上的分量 参照捷联惯性_里程仪_伪卫星车载组合导航系统研究 locity(i,:)) ) - gn 车体相对惯性系加速度在地理坐标系上的分量，标称值 参照捷联惯性_里程仪_伪卫星车载组合导航系统研究36 --两个论文(System angular velocity relative navigation system' s components in the system, inertial reference _ OD _ Pseudo Satellite Car Navigation System locity (i ,:))' )- gn body relative to inertial acceleration in the geographic coordinate system weight on the nominal value reference inertial _ OD _ pseudolite Car Navigation System 36- Two Papers)

基于导频的贝叶斯信道估计，可以大大减少MMSE信道估计的计算复杂度(Bayesian channel estimation based on the pilot, can greatly reduce the computational complexity of the MMSE channel estimation)