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DSSS
- (1) 产生数值为±1的用户随机数据；给出Matlab下对应的模块； (2) 产生并给出64×64的Walsh矩阵，作为用户接入的扩频码； (3) 利用上述一个用户的扩频码和用户数据演示扩频过程；给出Simulink工作框图； (4) 利用FFT，计算并画出基带数据和扩频信号的频谱（在一个图中给出）； -(1) value of ± 1 generated random data users given under the corresponding Matlab module
DS_GMSK_MD
- 文件由两部分组成，直扩GMSK调制的matlab仿真程序和Verilog硬件程序。完成了对信号的扩频编码，GMSK调制，硬件程序中的高斯滤波器调用自matlab仿真产生。包括ds_gold_gmsk.m,mseq31.m,zhikuoGMSK.m以及d_encode.v,code_convert.v,frame.v,DS.v,gauss_filter.v,DS_GMSK_MD.v等编码，组帧，滤波，扩频，调制众多源码-Document consists of two parts, DSSS MS
58059
- n the telecommunications, direct-sequence spread spectrum (DSSS) is a spread spectrum modulation technique. Spread spectrum systems are such that they transmit the message bearing signals using a bandwidth that is in excess of the bandwidth that is a
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.)
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.)
DSSS_Matlab程序
- 所谓直接序列扩频，就是直接用具有高码率的扩频码序列在发送端去扩展信号的频谱。而在接收端，用相同的扩频码序列去进行解扩，把展宽的扩频信号还原成原始的信息。(Direct sequence spread spectrum (DSSS) is used to expand the spectrum of the signal directly at the transmitter side with high bit rate spread spectrum code sequence. At the