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ldpc-a-brief-tutorial
LDPC Codes – a brief Tutorial
Bernhard M.J. Leiner, Stud.ID.: 53418L bleiner@gmail.com
April 8, 2005
- 2011-06-02 15:26:08下载
- 积分：1
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frency_estiamte
OQPSK信号的频率估计，用的是相位与时钟联合估计算法，适用于突发的卫星信号等(OQPSK signal frequency estimation, using a phase estimation algorithm combined with the clock for emergency satellite signals)
- 2010-08-20 09:58:42下载
- 积分：1
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程序
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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lijing
说明： 基于Simulink的DPSK的通信系统仿真
Simulink 是MATLAB提供的实现动态系统建模和仿真的一个软件包，它让用户把精力从编程转向模型的构造，为用户省去了许多重复的代码编写工作；Simulink 的每个模块对用户而言都是透明的，用户只须知道模块的输入、输出以及模块的功能，而不必管模块内部是怎么实现的，于是留给用户的事情就是如何利用这些模块来建立模型以完成自己的仿真任务；至于Simulink 的各个模块在运行时是如何执行，时间是如何采样，事件是如何驱动等细节性问题，用户可以不去关心，正是由于Simulink 具有这些特点，所以它被广泛的应用在通信仿真中，利用Simulink 强大的工具箱和其建模的优势建立了常用的DPCM数字电话通信系统仿真模型，对该通信系统进行了模型构建、系统设计、仿真演示、结果显示以及综合性能分析，而且该分析方法同样可推广到其它的通信系统，具有普遍意义。(Simulink-based simulation of Simulink DPSK communication system is provided by MATLAB dynamic system modeling and simulation of a software package that allows users to shift attention from the programming model of the structure, the user save a lot of repetitive coding work Simulink Each module is transparent to the user, the user need only know the module s input, output and functional modules, rather than how the realization of the internal control module, and then left to the user to do is how to use these modules to build model to fulfill its a simulation tasks as Simulink s Ge Ge module at run time how Zhi Xing, Shi Jian yes how to sample, events are the details of how to drive and so on Xing problem, users can not care, Zheng Shi as Simulink those characteristics, so Ta is widely used in communication simulation, using Simulink toolbox and its powerful modeling advantage of the establishment of a common DPCM Digital telephone communication system simulation model, the communica)
- 2010-04-24 15:20:45下载
- 积分：1
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high1
its about gsm based appliance control drawn in DXP PROTEL
- 2012-06-14 23:36:08下载
- 积分：1
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pcm
语音编码方案的选取对移动通信系统的通话质量、信道容量等有重要影响。本文讨论了TD-SCDMA系统中AMR语音编码的自适应机制，同时分析了AMR中代数码本线性预测(ACELP)算法及实现过程。该方案可以在一块TMS320C5510上实现。(The selection of voice coding schemes for mobile communication systems the quality of the call, such as channel capacity have had a significant impact. In this paper, TD-SCDMA System AMR Adaptive speech coding mechanism, at the same time analysis of AMR in the generation of Digital Linear Prediction (ACELP) algorithm and the realization of the process. The program can be achieved in a TMS320C5510.)
- 2009-04-27 22:26:09下载
- 积分：1
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Viterbi_Algorithm
卷积码的Viterbi译码算法仿真程序
要求：递归卷积码，归零处理(Convolutional Codes Viterbi decoding algorithm simulation program requirements : recursive convolutional codes and zeroing treatment)
- 2021-04-10 19:08:59下载
- 积分：1
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fsyzmzp
调用mobile外部程序,操作系统windows mobile()
- 2018-04-21 07:58:13下载
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da1469x_led_driver
说明： LED样例代码，原厂提供。凑够20个字才行吗？(Led sample code, provided by the original factory. Can you make up 20 words?)
- 2019-11-19 18:34:37下载
- 积分：1
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54121454
采用多种方式移动无标题栏窗口,这些方法是可以在VC 6 0或易语言的源代码中引用,()
- 2018-05-04 16:57:16下载
- 积分：1
