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DSSS.rar
- 一个四用户的扩频通信系统，扩频增益为N=16，采用Walsh码进行直接序列扩频，BPSK调制，无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道：不考虑通信信道信号时，由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩，解调，判决，通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。,A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct
codeinterdsss1
- 对于bpsk直扩系统的误码仿真，直扩系统对于功率、频偏、相偏的鲁棒性。-For bpsk DSSS BER simulation systems, direct expansion systems for power, frequency offset, phase offset robustness. .
DSSS
- MATLAB仿真 BPSK调制，并用相干解调和差分相干解调方法解调信号，输出误码率-MATLAB simulation BPSK modulation and demodulation using coherent demodulation method and differential coherent demodulation signal, the output bit error rate
DS
- 实现直扩系统的simulink仿真，采用BPSK调制，可以直观理解直接序列扩频通信系统的工作原理(The realization of direct sequence spread spectrum communication system can be understood intuitively by the realization of Simulink simulation of DSSS and BPSK modulation.)
信号循环谱
- DSSS/BPSK循环谱检测程序以及对码元速率的估计(DSSS/BPSK cyclic spectrum detection program and estimation of symbol rate)
二次谱法
- 对DSSS/BPSK信号进行二次功率谱估计，可以估计出载频信息(The two power spectrum estimation of DSSS/BPSK signal can estimate carrier frequency information.)
平方倍频法
- 对DSSS/BPSK信号进行平方倍频法，可以对其载频进行估计(The frequency doubling method of DSSS/BPSK signal can be used to estimate its carrier frequency.)
时域自相关法
- 对DSSS/BPSK信号进行自相关处理，可以对其伪码周期进行估计(Autocorrelation of DSSS/BPSK signals can be used to estimate the PN code period.)
延时相乘法
- 对DSSS/BPSK信号进行延迟相乘，可以估计其伪码速率并检测(The DSSS/BPSK signal can be multiplied by delay, and its pseudo code rate can be estimated and detected.)