Description: 典型的Turb。码是一类并行级联的系统卷积码，当交织长度足够长时，其性能可逼
近仙农限。-Typical Turb. Code is a class of parallel concatenated convolutional codes of the system, when the cutting length for long enough, its performance can be close to Shannon limit. Platform: |
Size: 9858048 |
Author:123 |
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Description: This paper is about serially concatenated LDGM codes for MIMO channel. The ability of Serially-Concatenated Low Density Generator Matrix (SCLDGM)
codes to approach the capacity of ergodic Multiple-Input Multiple-Output (MIMO) channels is investigated. The paper explains how to design good SCLDGM codes using EXtrinsic Information Transfer (EXIT) analysis and
optimum detection. Platform: |
Size: 214016 |
Author:mike zhou |
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Description: 信道编码非常有用的一本书，可以供通信方面的参考一下- A reorganized and comprehensive major revision of a classic book, this edition provides a bridge between introductory digital communications and more advanced treatment of information theory. Completely updated to cover the latest developments, it presents state-of-the-art error control techniques. Coverage of the fundamentals of coding and the applications of codes to the design of real error control systems. Contains the most recent developments of coded modulation, trellises for codes, soft-decision decoding algorithms, turbo coding for reliable data transmission and other areas. There are two new chapters on Reed-Solomon codes & concatenated coding schemes. Also contains hundreds of new and revised examples and more than 200 illustrations of code structures, encoding and decoding circuits and error performance of many important codes and error control coding systems. Appropriate for those with minimum mathematical background as a comprehensive reference for coding theory. Platform: |
Size: 21752832 |
Author:vidivici |
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Description: 这是一套完整的支持wimax 16e协议CTC的编译码程序，
主程序在demo.c
译码器：tcdecoder.c
编码器：tcencoder.c-/* This program simulates the classical turbo encoding-decoding system on PC.*/
/* It uses parallel concatenated convolutional codes described in Figure 2.9 in Chapter 2.*/
/* Two component RSC (Recursive Systematic Convolutional) encoders are used. */
/* First encoder is terminated with tails bits. (Info+ tail) bits are scrambled and */
/* passed to the second encoder, while second encoder is left open without tail bits. */
/* Random information bits are modulated into+1/-1, and transmitted through an AWGN channel.*/
/* Interleavers are randomly generated for each frame.*/
/* Log-MAP algorithm without quantization or approximation is used.*/
/* By making use of ln(e^x+e^y) = max (x,y)+ ln(1+e^(-abs(x-y))), */
/* the Log-MAP is simplified with a look-up table for the correction term.*/
/* When the approximation ln(e^x+e^y) = max (x,y) is, we have MAX-Log-MAP.*/
/* To set the number of iterations, change the globle variable "DECITER". To set the fr Platform: |
Size: 26624 |
Author:bennytang |
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Description: 交织编码是一种信道改造技术，它通过信号设计将一个原来属于突发差错的有记忆信道改造为基本上是独立差错的随机无记忆信道。交织编码作为克服衰落信道中突发性干扰的有效方法，通常和其它用于纠正无记忆独立差错的信道编码相结合构成级联码，广泛应用于当代移动通信。
-Channel interleaved coded is a transformation of technology, which belongs to the original signal design will be a burst error channel with memory is basically a transformation of independent random error channel without memory. Overcome the fading channel interleaved coded as an effective method of sudden disturbance, usually independent of other for no memory error-correcting channel coding concatenated codes combining form, are widely used in modern mobile communications. Platform: |
Size: 3072 |
Author:刘超 |
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Description: This script simulates the classical turbo encoding-decoding system.
It simulates parallel concatenated convolutional codes.
Two component rate 1/2 RSC (Recursive Systematic Convolutional) component encoders are assumed.
First encoder is terminated with tails bits. (Info + tail) bits are scrambled and passed to
the second encoder, while second encoder is left open without tail bits of itself.
Random information bits are modulated into +1/-1, and transmitted through a AWGN channel.
Interleavers are randomly generated for each frame.
Log-MAP algorithm without quantization or approximation is used.
By making use of ln(e^x+e^y) = max(x,y) + ln(1+e^(-abs(x-y))),
the Log-MAP can be simplified with a look-up table for the correction function.
If use approximation ln(e^x+e^y) = max(x,y), it becomes MAX-Log-MAP.- This script simulates the classical turbo encoding-decoding system.
It simulates parallel concatenated convolutional codes.
Two component rate 1/2 RSC (Recursive Systematic Convolutional) component encoders are assumed.
First encoder is terminated with tails bits. (Info + tail) bits are scrambled and passed to
the second encoder, while second encoder is left open without tail bits of itself.
Random information bits are modulated into +1/-1, and transmitted through a AWGN channel.
Interleavers are randomly generated for each frame.
Log-MAP algorithm without quantization or approximation is used.
By making use of ln(e^x+e^y) = max(x,y) + ln(1+e^(-abs(x-y))),
the Log-MAP can be simplified with a look-up table for the correction function.
If use approximation ln(e^x+e^y) = max(x,y), it becomes MAX-Log-MAP. Platform: |
Size: 2048 |
Author:yk |
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Description: VS2010及IT++4.2下实现PCCC在AWGN信道上的仿真-This program simulates Parallel Concatenated Convolutional Codes (PCCCs) of coding rate 1/3 using a turbo decoder with two SISO RSC modules.
Reference: S. Benedetto, D. Divsalar, G. Motorsi and F. Pollara, "A Soft-Input Soft-Output Maximum A posteriori (MAP) Module to Decode Parallel and Serial Concatenated Codes", TDA Progress Report, nov. 1996 Platform: |
Size: 2048 |
Author:raven |
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Description: VS2010及IT++4.2下实现SCCC在AWGN信道上的仿真-This program simulates Serially Concatenated Convolutional Codes (SCCCs) of coding rate 1/4 using a turbo decoder with a SISO NSC module and a SISO RSC module.
Reference: S. Benedetto, D. Divsalar, G. Motorsi and F. Pollara, "A Soft-Input Soft-Output Maximum A posteriori (MAP) Module to Decode Parallel and Serial Concatenated Codes", TDA Progress Report, nov. 1996 Platform: |
Size: 2048 |
Author:raven |
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Description: A Soft-Input Soft-Output Maximum A Posteriori
(MAP) Module to Decode Parallel and
Serial Concatenated Codes Platform: |
Size: 267264 |
Author:krishan |
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Description: 通过阐述通信系统的基础理论，着重分析信道理论及信道编码方式，采用蒙特卡罗计算机仿真方法，利用MATLAB 提供的可视化工具Simulink 建立了信道编码的仿真模型，详细讲述了各编码方式的设计。在给定仿真条件下，运行了仿真程序，对二进制双极性通信系统中的几种基本信道编码进行了仿真性能测试和讨论,并从实际角度出发，对扩频通信中的信道编码进行了初步仿真，得出了在二进制双极性扩频通信系统中采用级联码，能够实现信道复用和误码性能双赢的结论。-Elaborate communication system is the basis of the theory focuses on the analysis of channel theory and channel coding way, using Monte Carlo computer simulation method provided by MATLAB visualization tool Simulink established channel coding simulation model, and details about the design of each coded way of . The simulation conditions of the given run a simulation program, several basic channel encoded binary bipolar communication system simulation performance tests and discussion, and from the practical point of view, and channel encoded in a spread spectrum communication Preliminary simulation obtained concatenated codes in binary bipolar spread spectrum communication system, able to achieve a win-win conclusion channel multiplexing and error performance. Platform: |
Size: 195584 |
Author:李腾飞 |
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Description: Five Matlab codes corresponding to the concatenation of mat files, importing multiple files at a time, down-sampling, up-sampling of a signal and finally a code which except unique one removes all variables from Matlab workspace programmatically. Platform: |
Size: 1024 |
Author:Nagaswathi
|
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Search - concatenated codes