LDPC_Decoder_TDMP

the modern coding theory book by richardson and urbanke

说明：  常规的单载波调制技术在带宽有限的测井电缆上的低传输速率制约着成像测井技术的发展。在分析测井 电缆传输特性和 OFDM 技术原理的基础上 ,设计了一种基于 OFDM 技术的测井电缆高速数据传输系统 ,并介绍了 基于 OFDM 技术的测井电缆高速数据传输系统的参数设计和工作原理 ,给出了不同长度测井电缆上的测试结果。 电缆实测结果表明 ,在 7 000 m长的测井电缆上 ,基于OFDM 技术的测井电缆高速数据传输系统可获得900 kbit / s 以上的数据传输速率和低于 5E28 的误码率。当变压器的接入模式为 Mode2II时 ,系统最高的数据传输速率可达到 1. 1 Mbit/ s。(To solve t he low data t ransmission rate problem in t he conventional single car rier mod2 ulation met hod for logging cable and enhance t he data t ransmission rate , a new data t ransmission system with high data t ransmission rate for logging cable is propo sed , which is based on t he Or2 t hogonal Frequency Division Multiplexing (OFDM) technology. The working principle of OFDM modem and t he procedure of data t ransmission system are al so presented and lot s of test s are car2 ried out on logging cables with different lengt hs. It is verified that t he data t ransmission rate can reach 900 kbit/s on 7 000 meter s logging cable wit h bit er ror rate (BER) lower t han 5E28 , and t he maximum data t ransmission rate is 1. 1 Mbit/s under Mode2II of t he t ransformer .)

EZW算法的过程详解和Matlab代码（1）构建扫描次序表（修正小波树结构） (Elaboration on the Course EZW algorithm and the Matlab code (1) Construction of scan of the list (revised wavelet tree structure))

去伪PID控制算法，一重新型的PID控制算法(It is a new pid control method)

DC/DC converter的simulink模型(Simulink modell of DC/DC converter)

多层次合作型协同演化算法，自适应分组规模的方法首次在CC中被应用(Multi-level cooperative co-evolutionary algorithms, adaptive packet size approach was first applied in the CC)

总结了五中时频分析方法（STFT,Gabor,WVD,PWVD,SPWVD）,并对个别方法进行了对比。每条程序都有详细的说明(Fifth summarized time-frequency analysis method (STFT, Gabor, WVD, PWVD, SPWVD), and the individual methods were compared. Each program has a detailed description)

文具体介绍了有关投影法进行字符分割的程序源码(Text details for the projection of the program source code character segmentation)

单载波频分多址的研究，可以降低单载波的峰值平均功率比(Single-carrier frequency division multiple access research, can reduce the peak single-carrier average power ratio)

说明：  用b-splines变换的方法实现分数延迟滤波器matlab仿真程序(Using b-splines transform method to achieve Score delay filter matlab simulation program)