LEO_Channel_MU

音频信号通过LM386放大，包括四元数的各种计算,D-S证据理论数据融合。( LM386 audio signal amplification, Including quaternion various calculations, D-S evidence theory data fusion.)

实现信号处理中QAM调制、过信道、解调部分。其中QAM调制部分可改符号点数，M阶数，信道加高斯白噪声、时延、多径，调制解调均有星座图。通过本代码，可学习QAM调制解调，或者通信系统的知识。(To achieve QAM modulation, signal processing over channel, a demodulation section. QAM modulation section can be changed symbolic points M order channel additive white Gaussian noise, delay, multipath, the modem has constellation diagram. QAM modulation and demodulation, or communication system knowledge through this code, you can learn.)

说明：  5. 在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum: (1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate. (2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve. (3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.)

说明：  空域零陷，首先用doa技术估计直达波方向，然后置零，用于直达波消除。(In spatial nulling, DOA technique is used to estimate the direction of direct wave, and then zeroing is used to eliminate direct wave.)

TJA1050中文说明！！！！！！！！！(TJA1050 CHINESE！)

MC-CDMA的matlab代码 包括发送，接收及通过nakagami信道(MC-CDMA, including the matlab code to send, receive and pass the Nakagami channel)

A C code for reading/writing data to ProSlic Si3200/3220 using CodeVision

STM32F411的心电测试程序，经过测试，绝对可用。(ECG_TESTCMSIScore_cm3.c ECG_TESTCMSIScore_cm3.h ECG_TESTCMSISstartupstartup_stm32f10x_hd.s ECG_TESTCMSISstartupstartup_stm32f10x_ld.s ECG_TESTCMSISstartupstartup_stm32f10x_md.s ECG_TESTCMSISstm32f10x.h ECG_TESTCMSISsystem_stm32f10x.c ECG_TESTCMSISsystem_stm32f10x.h ECG_TESTFWlibincmisc.h ECG_TESTFWlibincstm32f10x_adc.h ECG_TESTFWlibincstm32f10x_bkp.h ECG_TESTFWlibincstm32f10x_can.h ECG_TESTFWlibincstm32f10x_crc.h ECG_TESTFWlibincstm32f10x_dac.h ECG_TESTFWlibincstm32f10x_dbgmcu.h ECG_TESTFWlibincstm32f10x_dma.h ECG_TESTFWlibincstm32f10x_exti.h ECG_TESTFWlibincstm32f10x_flash.h ECG_TESTFWlibincstm32f10x_fsmc.h)

说明：  实现Massive MIMO容量分析的代码，相关文献为 Emil Bj?rnson Jakob Hoydis Luca Sanguinetti Massive MIMO has Unlimited Capacity IEEE Transactions on Wireless Communications(This is a code package is related to the follow scientific article Massive MIMO has Unlimited Capacity)

自己编的lms算法，用于扩频通信抑制窄带干扰的时域预测仿真(Own the lms algorithm for narrowband interference suppression spread spectrum communication time-domain simulation of the forecast)