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SPIHT(Matlab).zip
- % Matlab implementation of SPIHT (without Arithmatic coding stage) % % By Jing Tian, scuteejtian@hotmail.com fprintf('----------- Welcome to SPIHT Matlab Demo! ----------------\n'); fprintf('----------- Load
MPSK
- This m-file simulates MPSK (BPSK,QPSK,8PSK)with theoretical and simulated results using Gray coding. Numerical examples of a satellite link design are shown using QPSK and/or 8PSK when the bit rate(Rb)is greater than the channel bandwidth Wc (Band-li
fga.rar
- 遗传算法MATLAB函数程序，格雷编码，均匀，多点交叉，倒位操作,Genetic Algorithm MATLAB function procedures, Gray coding, uniform, multi-point crossover, inversion operation
GrayCode
- matlab环境下格雷码的编码，二进制译成格雷码，反之- gray coding in Matlab environment，Binary translated into gray yards
GMSK_QPSK_8PSK
- 里面有8PSK，GMSK的matlab源程序，贡献出来了-I was interested in the theory for 8PSK and came across this m-file written in 1999. It requires 2 function calls (graymapPSK and grayunmapPSK) which I have included and must be uncommented(single comments only) and
QPSK_chain
- Simulation of a baseband QPSK mod/demod: TX : a pseudo random bit stream generation, Serial to parallel conversion, QPSK Mapping (Gray coding), Signal power computation Channel : AWGN channel RX: Soft Demapping / Hard Demapping, Plot constellat
jpeg_encode+decoderhojoon
- This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -
coding
- 此代码是在保持信噪比的情况下，进一步提高了压缩比。灰度级的减少，势必会降低信噪比，但因为是处以比较小的整数，并没有引起熵值的剧烈变化，编码后信噪比基本不变。-This code is to maintain the signal to noise ratio of the case, to further improve the compression ratio. Gray-scale reduction, will inevitably reduce the signal to noise
JPEG_compression_image.m
- 利用Matlab编程实现对lena.bmp灰度图象进行QF=50和QF=40的压缩和解压缩，比较二者的PSNR，并且利用霍夫曼编码模拟信道中传输图象。通过了Matlab2009A测试。-Using Matlab program to compress and decompress the gray image Lena.bmp at QF = 50 and QF = 40,as well as comparing the result of two situation.Then using Hu
QPSK_ERROR_RAYLEIGH
- 这个程序是用格雷码的基带仿真，在加高斯白噪声的情况下仿真ber和ser曲线-the purpose of this m-file is to show a baseband simulated version of QPSK with Gray coding( Rayleigh multipath and AWGN added) which may give valid results
matlab
- gray coding for a 16QAM modulation scheme
GA
- fga.m为遗传算法的主程序,采用二进制Gray编码,采用基于轮盘赌法的非线性排名选择, 均匀交叉,变异操作,而且还引入了倒位操作- fga.m main program for the genetic algorithm binary Gray coding, using roulette-based non-linear ranking selection, uniform crossover and mutation operators, but also introduces t
gray
- 格雷码生成 对于给定的正整数n，格雷码为满足如下条件的一个编码序列： (1) 序列由2n个编码组成，每个编码都是长度为n的二进制位串。 (2) 序列中无相同的编码。 (3) 序列中位置相邻的两个编码恰有一位不同。-Gray code are generated for a given positive integer n, the Gray code to meet a coding sequence of the following conditions: (1) sequences enco
qpsk_graycoding_multipath_fading
- QPSK在多径衰落和加性高斯白噪声下的性能仿真，对于通信方面比较有用！-QPSK simulation with Gray coding and simple Rayleigh multipath fading channel and AWGN added
Viterbi
- 详细的卷积编码与维特比译码算法。产生随机信号，对信号进行卷积编码，然后经过数值转换、格雷编码，QPSK调制，进入加噪信道，之后进行QPSK解调，格雷解码， 数制转换、 维特比译码得到接收端的信号。-Detailed convolutional coding and Viterbi decoding algorithm. Random signal, the signal convolution coding, and then through numeric conversion, Gray c
vitsimdemo
- 采用卷积编码与维特比译码对通信过程进行了仿真，展示了卷积码的差错校正容量，调制方式采用QPSK-This demo shows how to use a convolutional encoder and decoder in a simulation of a communications link. It also shows the error correcting capability of convolutional codes. This demonstrates the con
qam16usinggraycoding
- QAM 16 USING GRAY CODING
QAM16_mini-project
- QAM 16 Constellation, Gray Coding, Average energy, Symbol errors are done for reference and 19th constellation.
matlab-prog
- QPSK + 16QAM mapping using gray coding with computing Bit Error Ratio
modparblocGray
- different block diagrams of different widely used LTE modulation techniques with Gray coding and BER performances in a wireless channel