ex9_3_PSK

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.)

说明：  5G PDSCH信道吞吐量matlab仿真，包括PDSCH信道产生及解调(NewRadioPDSCHThroughputExample)

对发射端功率进行分别配，使得系统吞吐量最大化(Distribute transmitter power to maximize system throughput)

说明：  不同信噪比下，能量检测虚警概率与检测成功率的关系(The relationship between energy detection false alarm probability and detection success rate under different SNR. .)

说明：  ldpc编码，里面有ldpc编码，译码以及一系列的具体说明(ldpc encode,ldpc decode and so on)

介绍了在移动通信系统中对抗多径衰落的一种重要技术——分集接收技术，并分析了各种分集、合并技术的优缺点，提出了RAKE接收机的概念和结构。 (Against multipath fading important technology- diversity reception technology in the mobile communication system, and analyze the advantages and disadvantages of the various sub-sets, merging technology RAKE receiver concepts and structures.)

基于Matlab的压缩感知信道估计算法 基于导频的信道估计 MMSE算法(Compressed Sensing Channel Estimation Based on MATLAB)

rs码通信系统的仿真实验，包括源程序和说明(rs code communication system simulation, including source and description)

WIgner Ville Distribution for time frequency analysis

matlab中使用FFT算法求两个信号的时频二维（互模糊）函数，可以实现信号的时延、多普勒频移联合估计（需要根据实际场景适当修改参数）(oint estimation matlab frequency two-dimensional FFT algorithm seeking the two signals (cross ambiguity) function, signal delay, Doppler shift)