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一种QPSK全数字化载波频偏估计算法
信号利用QPSK调制,采用全数字化的频偏估计方法(A full digital frequency offset estimation method using QPSK modulation)
- 2020-12-29 11:29:01下载
- 积分:1
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程序
说明: 当今世界电子对抗日益激烈,对于雷达低截获和抗干扰能力的研究越来越受到关注。OFDM (Orthorgonal Frequency Division Multiplexing,正交频分复用)雷达具有大时宽带宽积、波形设计方法灵活、频谱利用率较高以及低截获性能好的特性,因此逐渐成为雷达领域的重点研究方向。除此之外,OFDM信号时域和频域波形都比较复杂,当雷达信号采用OFDM技术时,敌方很难精确估计发射信号波形和瞬时频率,使得截获机不容易分析出检测到的雷达信号。当面对敌方的欺骗式干扰时,对于同样具有大时宽带宽积的线性调频信号,OFDM信号具有更好的抗欺骗式干扰的性能,因此OFDM技术在雷达上的运用愈来愈得到关注。(As electronic warfare becomes increasingly fierce, low intercept probability radar has become an important research filed in electronic countermeasures. OFDM (Orthorgonal Frequency Division Multiplexing) radars have gradually emerged due to their high spectrum efficiency, large time-bandwidth product, flexible waveform design methods, and low intercept probability.In addition, because of the complex time-frequency characteristics of the transmitted signal in OFDM radar, the enemy is difficult to estimate the transmitted signal waveform and instantaneous frequency.When faced with enemy deception interference, OFDM signals have better anti-spoofing performance for LFM signals that also have a large time-bandwidth bandwidth product. Therefore, the use of OFDM technology in radar is attracting more and more attention. .)
- 2020-11-19 21:49:39下载
- 积分:1
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M-ary-QAM-in
研究信道噪声对M-ary QAM的影响,适合数字通讯从业者(Effect of channel noise on M-ary QAM in)
- 2015-07-15 09:45:41下载
- 积分:1
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DLT645Debuger_645
朋友写的C++645通讯程序,支持645-1997与645-2007,支持自已组帧程序自动添加校验码通讯,可以增加数据标识定义,里面还有部分关于费控通讯代码,挺好,拿来分享(Friend write C++645 communications program to support the 645-1997 and 645-2007, to support their own group the frame program automatically adds the checksum communications, can increase data identifies the definition, there is also a section on the fee control communications code, good for them and share)
- 2020-09-20 21:27:53下载
- 积分:1
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mimo_BPSK_ML_ZF_MSME
说明: 2*2 mimo系统在BPSK调制下ML,ZF,MMSE检测算法性能比较(Performance comparison of ML, ZF and MMSE detection algorithms for 2 * 2 MIMO system under BPSK modulation)
- 2020-12-12 17:19:16下载
- 积分:1
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sivSimulaoion
Simulation of a UWB transmitter implementing PAM with TH div hr(Simulation of a UWB transmitter implementing PAM with TH div h)
- 2019-03-27 02:35:52下载
- 积分:1
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John.Wiley.and.Sons.Essentials.of.Error.Control
第1章 用于可靠数字传输和存储的编码
第2章 代数引论
第3章 线性分组码
第4章 重要的线性分组吗
第5章 循环码
第6章 二进制BCH码
第7章 非二进制BCH码、RS码及其译码算法
第8章 大数逻辑可译码有限几何码
第9章 线性分组码的网络
第10章 基于可靠性的线性分组码软判决译码算法
第11章 卷积码
第12章 卷积码的最优译码
第13章 卷积码的次优译码
第14章 基于网络的软判决译码算法
第15章 级联编码、码分解与多阶段译码
第16章 Turbo编码
第17章 低密度单奇偶校验码
第18章 网络编码调制
第19章 分组编码调制
第20章 纠突发错误码
第21章 纠突发错误卷积码
第22章 自动请求重传(ARQ)策略
附录A 伽罗华域的表
附录B GF(2m)中元素的最小多项式
附录C 长度至2 10-1的二进制本原BCH码的生成多项式
9.6 卷积码
(Error-controlled coding techniques are used to detect and/or correct errors that occur in the message transmission in a digital communications system. Wireless personal channels used by mobile communications systems and storage systems for digital multimedia data all require the implementation of error control coding methods. Demonstrating the role of coding in communication and data storage system design, this text illustrates the correct use of codes and the selection of the right code parameters. Relevant decoding techniques and their implementation are discussed in detail. Providing communication systems engineers and students with guidance in the application of error-control coding, this book emphasizes the fundamental concepts of coding theory while minimising the use of mathematical tools.
* Reader-friendly approach ti coding in communication systems providing examples of encoding and decoding, information theory and criteria for code selection
* Thorogh descriptions of releva)
- 2021-04-26 14:28:45下载
- 积分:1
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ASK
Ask调制,简单实用Ask调制Ask调制Ask调制(ASK mod)
- 2011-12-12 18:07:45下载
- 积分:1
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three-basic-collaborativ
AF,DF,CC,三种基本协作方式仿真程序(Simulation of three basic collaborative approach)
- 2011-07-05 21:05:50下载
- 积分:1
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仿真各种模型下常用水声信道
说明: 可以直接仿真各种模型下常用水声信道,包含Bellhop,Kraken等源代码(Simulating the basic underwater acoustic channel, including the code and theory of Bellhop, Kraken and so on.)
- 2020-06-09 11:55:50下载
- 积分:1