Description: 抽头长度可变的802.11n信道估计方法.802.11n即将出台，无线网络将迎来革命。本程序是针对802.11n的TGN信道进行可变抽头估计的代码。-Variable length tap 802.11n channel estimation method .802.11 n upcoming wireless networks will usher in the revolution. This procedure is the TGN for 802.11n channel to tap the estimated variable code. Platform: |
Size: 1010688 |
Author:刘云 |
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Description: ) Compression using huffman code
-with a number of bits k per code word
-provide huffman table
Huffman coding is optimal for a symbol-by-symbol coding with a known input probability distribution.This technique uses a variable-length code table for encoding a source symbol. The table is derived in a particular way based on the estimated probability of occurrence for each possible value of the source symbol .Huffman coding uses a specific method for representing each symbol, resulting in a prefix code that expresses the most common characters using shorter strings of bits than those used for less common source symbols.The Huffman coding is a procedure to generate a binary code tree.
-) Compression using huffman code
-with a number of bits k per code word
-provide huffman table
Huffman coding is optimal for a symbol-by-symbol coding with a known input probability distribution.This technique uses a variable-length code table for encoding a source symbol. The table is derived in a particular way based on the estimated probability of occurrence for each possible value of the source symbol .Huffman coding uses a specific method for representing each symbol, resulting in a prefix code that expresses the most common characters using shorter strings of bits than those used for less common source symbols.The Huffman coding is a procedure to generate a binary code tree.
Platform: |
Size: 1024 |
Author:ria |
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Description: 这是关于LDPC信道编码模块设计的程序
打开源程序，先运行gengrate_h.m程序，陆续将码长设置为756bit，列重设置为3，行重设置为9。在Workspace中同时将H、A、B、C、D、E、Hget、Fget、g、Tget这是个变量选择另存为encode_in.mat 格式。再运行main_encode.m进行编码，主程序运行后，在当前目录下，自动生成编码结果文件“encode—out.mat”，这将作为下一次扩频调制仿真实验的的输入信号。最后分别查看Workspace中的变量s（编码前数据）和xyuan（编码后数据）的波形。
对比后，可以看出编码前的数据码片长度为504bit，编码后的码片数据长度为756bit。编码效率=编码前码片长度/编码后码片长度=2/3。-This is about the LDPC channel coding module design process
Open source, first run gengrate_h.m program, phasing out the code length is set to 756bit, column re-set to 3, line weight is set to 9. In the Workspace in the same time, H, A, B, C, D, E, Hget, Fget, g, Tget This is a variable select Save As encode_in.mat format. Then run main_encode.m encoding, the main program running in the current directory, the results of automatically generated code file "encode-out.mat", which will serve as the next simulation of the spread spectrum modulation input signal. Finally, the variables were View Workspace in s (before encoding data) and xyuan (encoded data) waveform.
After comparison, we can see the data before encoding chip length of 504bit, encoded data length of chip 756bit. Coded before coding efficiency = chip length/length of the encoded chip = 2/3. Platform: |
Size: 15360 |
Author:吴健 |
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Description: HUFFMAN Builds a variable-length Huffman code for a symbol source.
CODE = HUFFMAN(P) returns a Huffman code as binary strings in
cell array CODE for input symbol probability vector P. Each word
in CODE corresponds to a symbol whose probability is at the
corresponding index of P.
Based on huffman5 by Sean Danaher, University of Northumbria,
Newcastle UK. Available at the MATLAB Central File Exchange:
Category General DSP in Signal Processing and Communications.
-HUFFMAN Builds a variable-length Huffman code for a symbol source.
CODE = HUFFMAN(P) returns a Huffman code as binary strings in
cell array CODE for input symbol probability vector P. Each word
in CODE corresponds to a symbol whose probability is at the
corresponding index of P.
Based on huffman5 by Sean Danaher, University of Northumbria,
Newcastle UK. Available at the MATLAB Central File Exchange:
Category General DSP in Signal Processing and Communications.
Platform: |
Size: 1024 |
Author:mohammad |
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Search - variable length code matlab