a_project_of_mobile_compny

针对数字卫星常用的 7 种通信信号调制方式(QPSK、8PSK、16QAM、32QAM、64QAM、16APSK、32APSK)，对零中心归一化瞬时幅度谱密度最大值、四次方谱、幅度、高阶累积量四种特征参数进行了分析，提出了一种联合特征参数的信号调制识别方法．(Aiming at seven communication signal modulation modes commonly used in digital satellite (QPSK, 8PSK, 16QAM, 32QAM, 64QAM, 16APSK and 32APSK), four characteristic parameters of zero-center normalized instantaneous amplitude spectral density, quadratic spectrum, amplitude and high-order cumulant are analyzed, and a signal modulation recognition method of joint characteristic parameters is proposed. Method.)

用于LDPC编码译码的仿真实现。包括随机生成校验矩阵、由校验矩阵产生生成矩阵、编码、加随机噪声、译码等内容。(For LDPC codec simulation. Including randomly generated check matrix, generated by the parity check matrix generator matrix, coding, plus random noise, such as decoding.)

HDLC控制协议中CRC校验码算法代码，为CRC16，Verilog语言(HDLC Control Protocol Code in the CRC checksum algorithm code for CRC16, Verilog language)

Analytic framework for performance evaluation of multi-antenna wimax

说明：  基于MATLAB编程实现m序列、gold序列、kasami小集序列，并分析各自的自相关，互相关性能。(Based on MATLAB programming, m-sequence, gold sequence and Kasami small set sequence are realized, and their autocorrelation and cross-correlation performance are analyzed.)

这是一个完整的OFDM通信系统仿真代码。包括信源编码信源调制，信道编码，信道估计，峰均抑制比等。实际程序可用直接运行。(This is a complete OFDM communication system simulation code. Including the source modulation source coding, channel coding, channel estimation, peak to average ratio suppression. The actual procedure can be run directly.)

说明：  c语言实现的lwm2m协议，程序是可以直接编译通过的，主程序在src的lwm2mclient.c中(The lwm2m protocol implemented by C language can be compiled and passed directly. The main program is in lwm2mclient.c of src.)

含有交织码编码与解码,以及纠错和误码率分析,()

3D MIMO下，比较了单用户和多用户下Taylor简化的容量(In 3D MIMO, the simplified capacity of Taylor under single-user and multi-user comparison is compared)

关于通信系统的simulink仿真，包括基本介绍，数字信号传输，信道编码，OFDM方式，MIMO系统仿真(On the communication system simulink simulation, including a basic introduction to digital signal transmission, channel coding, OFDM mode, MIMO system simulation)