decoding complexity中文什么意思

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1. Erasure codes which belong to standard classes of rs codes and their erasure correcting principles are introduced with emphasis on cascaded low - density erasure codes with linear time encoding and erasure recover algorithms . the encoding and decoding complexities of these codes are analyzed . 2
   介绍了标准的rs码类纠删码及其纠删原理，重点介绍了具有线性时间编码和恢复算法的渐近好码?级联型低密度纠删码，分析了这几类纠删码的编译码复杂度； 2
2. Space - time block codes ( stbc ) based on orthogonal design has attracts enough attentions in its applications in mimo - ofdm systems for its full diversity exploiting and low coding / decoding complexity . these applications include not only system performance improvement , but also reduction of the peak to average power ratio in mimo - ofdm systems . under these backgrounds , this paper first studies space - time block codes under the single carrier , flat fading situation , discusses the encoding / decoding principle and its performance under different channels . then , the author focused on the performance of space - time codes under time selective and frequency selective channels , uncovered the fundamental cause of how maximum doppler shift and power delay profile influences the performance of space - time codes through deduction and simulation
   在上述背景下,本文以单载波,平坦衰落信道下的空时分组码为切入点,深入分析了其编译码原理和在不同信道情况下的性能;以此为基础,后文展开了对空时分组码在多载波,时间选择性和频率选择性衰落信道下的性能研究,通过理论推导和充分的仿真,揭示了空时/频分组码在时频选择性衰落信道中的性能变化的根本原因;在以上对多载波系统中空时分组码的研究的过程中,作者发现了空时分组码在降低系统峰平比方面应用的可行性,提出了一种降低峰平比的新方法。
3. In this paper , the constraint viterbi algorithm is studied from the project research on a novel product code and decode which is a project of national natural science foundation of china , experiment results show that it can overcome the drawback and reduce the decoding complexity while keeping the good characteristic of conventional viterbi algorithm
   本文所研究的约束维特比算法基于国家科学基金项目《新一代乘积编码( productcode )及解码方法的研究》 ,不但保持了原有维特比算法的特性,而且在减少译码路径的情况下,能较好地解决上述问题。