摘要：This paper describes a new interleaver construction technique for turbo code. The technique searches as much as possible pseudo-random interleaving patterns under a certain condition using genetic algorithms(GAs). The new interleavers have the superiority of the S-random interleavers and this interleaver construction technique can reduce the time taken to generate pseudo-random interleaving patterns under a certain condition. The results obtained indicate that the new interleavers yield an equal to or better performance than the S-random interleavers. Compared to the S-random interleaver, this design requires a lower level of computational complexity. Key words interleaver - Turbo codes - genetic algorithm CLC number TN 911. 22 Foundation item: Supported by the National Natural Science Foundation of China (60372057) and the Key Open Laboratory on Information Science and Engineering of Railway Transportation Ministry of Beijing Jiaotong University of China (KLISAE-0103)Biography: Tan Ying (1963-), female, Associate professor, Ph. D, research direction: error control coding, analysis and design of wireless communication system.

摘要：运用光学干涉膜系半波层可调、多频滤波技术和"厚腔"多半波矩形修正方法,设计出了膜层少、带宽窄且信道间隔可调的interleaver器件,给出了50G、100Ginterleaver的设计实例,其中心波长、通带宽度(@25dB,@0.5dB)、通带波纹等性能指标完全满足DWDM通信系统的要求。

摘要：MZI型interleaver的光谱形状、隔离度和温漂等特性是该器件实用化必须解决的问题。从器件的实用角度出发,介绍了提高MZI型interleaver相关性能的多种方法,并分析了各种改进方案的原理、特点及现状。这些改进型结构对器件的优化设计具有实际的指导意义,可望用于50GHz以下信道间隔的DWDM系统中。

摘要：根据最近研究的一种改进型光纤Mach-Zehnder干涉仪(MZ1)型interleaver存在的问题,提出一种改善其滤波特性的新结构．对其原理和相关参数进行了模拟分析,结果表明新结构的光谱形状与隔离度都比原结构有较大改善,且保持了信道的对称性．本文分析计算的结果对器件的优化设计具有实际的指导意义．

摘要：针对interleaver的不同实现方案,介绍了几种新颖的改进结构。首先分析了改进方案的原理,之后对新旧结构的性能进行了比较,结果显示了新方案的性能优异性。这些新颖的设计无疑将对Inter-leaver的成熟商用起着极大的推动作用。

摘要：对于光纤通信领域有限的带宽资源,波分复用与解复用器件interleaver是未来密集型波分复用(DWDM)光纤通信网中的关键器件。为此结合非均匀取样光栅interleaver的基本设计原理,运用耦合模理论和矩阵传输方法对非均匀取样光纤布拉格光栅的传输特性进行了数值模拟计算,并设计了信道间隔为0.8nm的设计实例,反射谱峰值均匀达到80%～95%,传输通道间隔稳定均匀,时延和色散均匀,时延抖动小于200ps。

摘要：It is well known that interleavers play a critical role in Turbo coding/decoding schemes, and contention-free interleaver design has become a serious problem in the paraUelization of Turbo decoding, which is indispensable to meet the demands for high throughput and low latency in next generation mobile communication systems. This paper unveils the fact that interleavers based on permutation polynomials modulo N are contention-free for every window size W, a factor of the intedeaver length N, which, also called maximum contention-free interleavers.

摘要：提出了一种新颖的晶体型波长分插解复用器 (interleaver)结构 ,该结构全部采用双折射晶体来实现 ,具有 PMD补偿、PDL低和温漂小等特点 ,同时具有很小的外观尺寸。加工及装配误差分析表明这种结构的 interleaver完全可以满足 ITU- T10 0 GHz波长间隔的解复用。

摘要：In the study and implementation of a programmable RS codec module in satellite communication modem, FPGA is used as the kernel in the implementation, while some ASICs are used as necessary assistant measures. The module includes the RS codec unit, the interleaver and deinterleaver unit, the scrambler and descrambler unit and the frame synchronization unit. The module is realized successfully and it can be programmed on-line to meet the requirements of IESS 308/309/310 including many specifications about different service types and data rates. With the implementation combining FPGA with ASICs, size of the circuit is much reduced, its flexibility dramatically increased, and its stability further strengthened. Furthermore, the module is based on the software radio concept and can be easily integrated into the whole satellite communication modem.

摘要：未来全光网促进了新型光数字波分复用器interleaver的发展.基于取样光纤布拉格光栅的interleaver具有低插入损耗、多信道均匀反射峰和低色散等优点,特别适用于全光网的波长复用/解复用、插入/分离。为此提出了基于取样布拉格光纤光栅interleaver的设计理论方法,合理设计其结构参数,并对其多波长滤波输出谱进行数值仿真,从而在<50GHZ的DWDM窄带间隔实现均衡多波长滤波。这对光纤光栅在全光网的应用研究有一定的理论意义和工程应用参考价值。