新建文件夹

一个科技公司使用的GPRS接收程序。可是直接使用(A PROGRAM OF GPRS SERVER 。IT S VERY EASY TO USE.)

说明：  lbc_example：未编码的BPSK调制的性能（理论计算与仿真）、重复码硬判决的性能 lbc_example_SD： 未编码的BPSK调制的性能（理论计算）、重复码硬判决的性能、重复码软判决的性能 lbc_example_SD_EbNo：lbc_example_SD中的性能，并且进一步考虑了码率不同时，对于信道的SNR值进行归一化，以Eb/No = SNR/(2*R)为横坐标时的比较结果 lbc_example_Hamming_EbNo：汉明码，硬判决译码的性能(Lbc_example: Performance of uncoded BPSK modulation (theoretical calculation and simulation), performance of duplicate code hard decision Lbc_example_SD: Performance of uncoded BPSK modulation (theoretical calculation), performance of hard decision of duplicate code, performance of soft decision of duplicate code The performance of lbc_example_SD_EbNo: lbc_example_SD is considered, and the SNR value of channel is normalized when the bit rate is different. The comparison results are obtained when Eb/No = SNR/(2*R) is the abscissa coordinate. Lbc_example_Hamming_EbNo: Hamming Code, Performance of Hard Decision Decoding)

说明：  其中第一个压缩文件为ESPRIT在一维和二维下的算法，二维采用的是L形阵列，另外的一个文件是MUSIC算法以及rootMUSIC算法，以及两者的对比代码文件(One dimension and two dimension Esprit DOA estimation algorithm)

建立了直接序列扩频系统的matlab仿真模型，在信道中存在高斯白噪声和干扰的情况下，对系统的在不同扩频增益下的误码率性能进行了仿真及分析，分析了扩频码的自相关性、误码率、性噪比。(A matlab simulation model of the direct sequence spread spectrum system, the existence of Gauss white noise and interference in the channel under the condition of the system in different spreading gain the BER performance of the simulation and analysis, analysis of PN code autocorrelation, BER, SNR)

qpsk信号插入导频，使用升余弦滤波器，利用导频估计信道，在simulink中仿真(inset pilot in QPSK signal, use square root raised cosine filters in simulink)

说明：  64qam调制解调的Matlab程序仿真代码，对研究64QAM很有帮助(64qam modulation and demodulation process of the Matlab simulation code, very helpful for research 64QAM)

针对盲模拟调制信号的自动识别算法，利用了盲信号识别中常用的gamma、ap、dp、P等参数，并附送dsb、lsb、usb、am、fm信号的生成程序(Automatic analogue modulation recognition using MATLAB. There is also a function to generate dsb,lsb,usb,am,fm signal)

Factorial recursion , try it

说明：  ls 与 mmse 两种信道估计算法比较(Comparison of LS and MMSE channel estimation algorithms)

次程序用来仿真叠加了地杂波和高斯白噪声的回波信号(Second program is used to simulate the ground clutter superimposed Gaussian white noise and the echo signal)