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dsnonoise
- 直接序列扩频系统是在发端直接用具有高码率的扩频编码去扩展信号的频谱,而在收端用相同的扩频编码进行解扩使扩频信号还原为原始信号的一种扩频方式。直接序列系统中用的编码序列通常是伪随机序列或叫伪噪声(PN)码。要传送的信息经数字化后变成二元数字序列,它和伪随机序列模二相加(或相乘)后变成复合码去调制载波。在直接序列系统中通常对载波进行二进制相移键控调制(BPSK)。当扩频调制后由天线发射出去,在接收机中要有一个和发射机中的伪随机码同步的本地码,对接收信号进行解扩,解扩后的信号送到解调器取出传送的信息-
chengxu9.rar
- 有关扩频通信系统的MATLAB程序----直接序列扩频系统,PN序列的产生。,On the spread spectrum communication system in MATLAB procedures---- Direct Sequence Spread Spectrum Systems, PN sequence generation.
dds
- 直接序列扩频码的仿真,介绍了通过PN码实现扩频系列的设计和运用-Simulation of direct-sequence spread-spectrum code, introduced by PN code to achieve the design and use of spread spectrum
FFT
- matlab直接序列扩频通信系统,FFT变换抑制窄带干扰技术-Matlab direct sequence spread spectrum communication system, FFT transform inhibit narrowband interference technology
cdma
- 编写了MATLAB程序生产和扩频码进行仿真,仿真程序从发送方完成通道的接收端,得出在不同的扩频码,在不同的信噪比即误码率的图形比较直接序列扩频通信系统原理,改善系统性能的度-Written MATLAB program to produce and direct sequence spread spectrum communication system principle of spreading codes for simulation, emulation program to comple
MATLBDDS
- 【matlab编程代做】BPSK调制解调直接序列扩频系统源代码(白噪声及瑞利衰落误码率比较) -[Do] matlab programming generation direct sequence spread spectrum BPSK modulation and demodulation system source code (white noise and Rayleigh fading BER comparison)
obhewxr
- 直接序列扩频通信系统误码率的仿真分析PN码同步方法的比较与仿真-Bit error rate of direct sequence spread spectrum communication system simulation analysis of the comparison of PN code synchronization method and simulation
comearison
- 直接序列扩频通信系统误码率的仿真分析PN码同步方法的比较与仿真(Bit error rate of direct sequence spread spectrum communication system simulation analysis of the comparison of PN code synchronization method and simulation)
直接序列扩频水印的嵌入与提取
- 实现直接序列扩频水印的嵌入与提取。基于待嵌入消息生成二进制水印序列,生成扩频码,用消息序列调制生成水印序列。依次处理灰度图像的每一个载体图像像素,根据相应位置 水印序列完成嵌入修改。(Realize the embedding and extraction of direct sequence spread spectrum watermark. The binary watermark sequence is generated based on the message to be embed