An-Efficient-Detail-Preserving-Approach

直扩码分多址DS-CDMA是利用高速的WALSH正交码序列作为地址码，与多用户信息数据相乘得到信息数据的直接扩频信号，再经过BPSK调制后发送出去，经过AWGN无线信道的传输后，在接收端与本地产生的地址码进行相关检测，从中将地址码与本地码一致的用户数据选出，把不一致的用户数据删除。(DS-CDMA DS-CDMA is the use of high-speed WALSH orthogonal code sequences as address code, with multi-user information data has been multiplied by the direct spread spectrum data information signal, and then after a BPSK modulated sent through AWGN channel after transmission, at the receiving end with the locally generated address code associated Detect, which will address code with local codes consistent user data elected to delete user data inconsistencies.)

说明：  EEMD分解信号，可将信号分解为不同频率的固有模态分量，方便后续分析(EEMD decomposition signal)

　?　　bpsk信号的产生可用与仿真的输入信号(? Bpsk signals generated can be used with simulation of the input signal)

说明：  本程序为回波抵消程序，程序中附有解释，很明了，并能到达到消除回波的效果(This procedure for the echo cancellation process, accompanied by explanation of procedures, it is clear, and able to achieve the elimination of echo effect)

this folder contains VIs related to USRP.

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实现雷达信号处理仿真，LFMMTIMTD(radar signal processing,including MTI,MTD,LFM signal)

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.)

对BPSK进行matlab仿真，包括完整参数，星座图(Matlab simulation of BPSK)

基于OFDM系统，实现classen,Moose提出的频偏估计技术，(Frequency offset estimation technique proposed by Classen and Moose based on OFDM sys)