shannon limit造句

• Shannon limit explanation on the unb modulation
  超窄带调制的乡农极限解释
• Construction of low - density parity - check code approaching the shannon limit
  构造接近香农极限的低密度校验码
• In awgn channel , this paper gives the shannon limit analysis of bfsk coherent detection
  本文还对bfsk信号相干检测在awgn信道模型下的香农限进行了分析。
• Ldpc codes and turbo codes are similar in many aspects , both can extremely approach to the shannon limits by their unique ways
  Ldpc码的重新发现是继turbo码后在纠错编码领域的又一重大进展。
• This paper gives the shannon limit analysis and numerical results while the modulation is bpsk . the numerical results of different coding rate are shown
  本文对bpsk信号调制格式下的香农限进行了理论分析和数值求解。
• Shannon limit is the limit of communication resource utilization . the main aim of coding is to construct the practical codes to approach the shannon limit
  香农限是通信资源利用率的极限,编码的目标是构造实用的逼近香农限的码。
• The conclusion is made that in the same case , the shannon limit of bfsk based on coherent detection is 3db more than that of bpsk in bsc channel
  通过本文的分析可以得到结论,同样条件下, bfsk信号相干检测时的香农限比bpsk信号在bsc信道模型下的香农限多出3db 。
• Low density parity check ( ldpc ) code , which is a special case of error correction code with sparse parity - check matrix , has the performance very close to the shannon limit
  Ldpc码是一种特殊的具有稀疏校验矩阵的纠错编码,其性能逼近香农限。这种码具有实现复杂度低和数据吞吐量高的优点。
• Low density parity check codes are a class of linear block error - correcting codes that can be defined by the very sparse parity - check matrix . their error performance approach shannon limits
  Ldpc码(低密度校验码)是一类可以用非常稀疏的奇偶校验矩阵定义的线性分组纠错码,具有逼近香农限的性能。
• Conventionally , dtv systems adopt coding schemes such as rs or convolutional codes , or concatenated codes , where the error correction performance is still quite far away from the shannon limit
  通常的，数字电视系统采用的信道编码方案为rs码或卷积码，或二者的级联码，它的纠错性能与香农极限相比，仍有一定的距离。
• Recently , much interest of the coding community has focused around a new family of error - correcting codes , called turbo codes , whose perfor - mances in terms of bit error rate ( ber ) are close to the shannon limit
  Turbo码作为一种新型的纠错编码类型备受通信界的注目，它的纠错能力能够接近shannon极限。 turbo码自1993年由c
• Later in 1990 ' s they were rediscovered and soon became the focus in channel code fields because of their remarkable performance close to shannon limit with iterative decoding and their structures for parallel decoding
  90年代中后期的重新研究发现,它采用迭代译码算法时表现出接近香农限的优异性能,且译码算法可以并行操作,因此迅速成为近年来通信编码领域的研究热点。
• Low density parity check ( ldpc ) codes are shown to be one class of shannon limit approaching codes . with advantages of high encoding gain , low decoding complexity and flexible code rates , etc . , the research of these codes has become a hot spot of coding academia
  低密度校验码( ldpc )性能接近香农限,具有编码增益高、译码简单快捷、码率灵活等优点,是当前编码界的研究热点。
• At the same time , the simulation analysis on the decoding performance of turbo codes was given , and the results show that under the certain conditions , turbo codes approaches the theoretical shannon limit , which proves its excellent performance of decoding
  同时对其译码性能进行了仿真分析，结果表明，在特定的参数条件下，其误码率接近香农极限，验证了其优异的纠错译码性能。
• Based on the simulations of the two codes , this paper gets the distance of their performance to shannon limit . at last , this paper discusses a new type of communication method meec ( minimum essential emergency communications ) . meec receives information
  本文最后讨论了一种新的通信方式? ?最低限度通信,最低限度通信采用相关攻击的方式接收信息,其通信的有效性和可靠性都是值得讨论的地方,目前对其性能分析还没有完整的结论。
• For its error correction performance extremely close to the shannon limit , from the beginning , turbo codes attracts the eyes of enormous professionals and researchers . in turn , it is called the greatest contribution after ungerboeck ' s trellis coded modulation ( tcm )
  因为它具有极其逼近香农极限的纠错性能，从一开始turbo码便吸引了通信领域无数专家学者的关注与研究，进而被誉为继ungerboeck提出格状编码调制( tcm )以来，信道编码领域最伟大的贡献。
• A new turbo codes using chaotic soft spreading spectrum is also suggested . by theoretic analysis and simulation , the novel codes has better performance such as lower ber ( bit error rate ) and other features as compared to conventional turbo codes . on this basis , a new codes called rsi ( random spreading iterative ) codes with the capability of approaching the shannon limit is introduced
  3 、提出了一种基于混沌软扩频的turbo码设计方法，通过理论分析和仿真，证实了该方法比一般turbo码有更好的系统特性，更低的误码率和对系统性能的多重改善作用，显示出该方法优越的理论特性利实用价值。
• Turbo code is regarded as the milestone in channel encoding theory history for its performance closing to shannon limit , which makes us covert to decrease the numbers of light weight code ( error coefficient ) from increasing the minimum hanming weigh . the research and analysis are concentrated on the following : 1
  Turbo码具有近shannon限的性能，它的出现被看作是信道编码理论发展史上的一个里程碑，它使人们设计信道编码的方法从增加码的最小汉明距离转向了减少低重量码字的个数(错误系数) 。
• Dvb - s2 is the second - generation digital video broadcasting specification for satellite applications developed by digital video broadcasting ( dvb ) project in 2003 . compare with dvb - s , it has been specified around three concepts : best transmission performance approaching the shannon limit , total flexibility , and reasonable receiver complexity
  Dvb - s2是第二代卫星数字视频广播标准,由dvb ( digitalvideobroadcasting )项目组于2003年发布。与dvb - s标准相比,能够在合理的接收机复杂度下得到更好的性能和更大的灵活性。
• This paper mainly contains the following aspects : ( 1 ) first , simply introduce the development of error - correcting codes ; analyse the capacity of channels ; and introduce the background of ldpc codes , point out that researching on ldpc codes will help us get to the shannon limit
  本文主要研究内容如下: ( 1 )首先,简要概述了纠错编码的发展情况;并分析了信道容量的计算;对ldpc码的产生和研究现状进行了论述,指出对ldpc码的深入研究,有助于我们朝着shannon限所在的方向迈出更大的步伐。