搜索资源列表
-
2下载:
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-
-
-
0下载:
有关载波调制的数字传输的MATLAB程序---载波幅度、相位、频率调制。-Related to modulation of the digital transmission of the MATLAB program--- carrier amplitude, phase, frequency modulation.
-
-
0下载:
a very good tutorial about digital modulation from Harris
-
-
0下载:
基于dct的数字水印,用ofdm对水印信息进行调制-Dct-based digital watermarking with ofdm modulation of the watermark information
-
-
0下载:
数字水印技术中的DM(抖动调制)水印算法的一个简单的小程序-Digital watermarking technology in the DM (jitter modulation) Watermarking a simple little program
-
-
0下载:
数字水印,水印的嵌入,水印的提取检测,量化编码调制水印的实现-Digital watermark, the watermark embedding, watermark extraction testing, to quantify the realization of coded modulation watermarking
-
-
0下载:
数字信号基带传输系统误码率,功率谱,眼图的程序-digital modulation
-
-
0下载:
该源码是使用抖动加网算法,调频算法二值化处理图像。实现图像加网,是数字加网的一种方法。
-
This source code is the use of jitter and network algorithm, frequency modulation algorithm binarization processing image. To realize image with the nets, digital and network is a kind of method.
-
-
0下载:
nakagami 衰落信道上几种数字调制方式的误码率仿真-the fading channels several digital modulation in nakagami BER simulation
-
-
2下载:
基于DCT域的数字水印算法主要包括水印调制、水印嵌入和水印提取,首先在嵌入载体图像之前用Logistic混沌序列对水印进行调制,得到一个只有+1和-1随机序列的水印,同时将载体图像进行全局DCT变换,然后将水印图像嵌入人类视觉系统最重要的部分,即DCT最大的系数,DC(Direct Current)部分也包含在这最大的系数中,这部分的系数满足人类视觉特性,会使水印嵌入的性能更好。嵌入算法是将水印与这些系数进行相乘获得新的系数,再用新的系数来替换原来的系数,即获得嵌入水印后的离散余弦域的图像,然后
-
-
0下载:
刚刚做的数字非线性功放的预失真模型,对调制信号的非线性功放造成的失真有很好的修复作用。-Just do digital predistortion model nonlinear amplifier, power amplifier nonlinear distortion caused by the modulation signal has a good repair.
-
-
0下载:
本程序实现对多进制PSK数字调制系统的仿真,程序运行需要几分钟(This procedure realize the multi-band PSK simulation of digital modulation system, program to run for a few minutes)
-
-
0下载:
The commonly used digital signal modulation based on artificial neural network, Related impulse response analysis algorithm and inspection, Use Chaos and fractal analysis routines.
-
-
0下载:
It uses a pulse of consumer law, The commonly used digital signal modulation based on artificial neural network, music higher order spectral analysis algorithm.
-
-
0下载:
Continuous phase modulation signal (CPM) to produce, To achieve the recognition of 10 digital sound, Part of the license plate recognition locator feature.
-
-
0下载:
Can realize the two-dimensional data clustering, The commonly used digital signal modulation based on artificial neural network, Based on negative entropy largest independent component analysis.
-
-
1下载:
完成了DCT量化,哈夫曼编码,信道编码,数字调制功能(DCT quantization, Huffman coding, channel coding and digital modulation are completed.)
-