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编码序列相关特性分析
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作者 张卫党 杨守义 李金凤 《郑州大学学报(理学版)》 CAS 2003年第3期56-59,共4页
对编码序列之间的相关特性进行了分析研究 ,将一般的相关概念进行推广 ,推导出全相关不变定理 ,揭示了编码序列之间的内在相关机制 ,更深入地描述了序列之间的相关特性 ,指出线性变换前后两序列的全相关值恒为 1.为探讨序列之间的相关... 对编码序列之间的相关特性进行了分析研究 ,将一般的相关概念进行推广 ,推导出全相关不变定理 ,揭示了编码序列之间的内在相关机制 ,更深入地描述了序列之间的相关特性 ,指出线性变换前后两序列的全相关值恒为 1.为探讨序列之间的相关关系提供了一有力工具 ,尤其是有助于Turbo码中删截矩阵的选取 . 展开更多
关键词 TURBO码 编码序列 相关特性 相关不变定理 线性变换 全相关函数 内在相关机制
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Correlation Combination Ambiguity Removing Technology for Acquisition of Sine-Phased BOC(kn,n) Signals 被引量:3
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作者 LIU Wen XI Yue +2 位作者 DENG Zhongliang JIAO Jichao YIN Lu 《China Communications》 SCIE CSCD 2015年第4期86-96,共11页
Binary Offset Carrier(BOC) has been chosen as one of modulation methods in the future Global Navigation Satellite Systems(GNSS). Even though BOC signals can bring several advantages such as better track performance an... Binary Offset Carrier(BOC) has been chosen as one of modulation methods in the future Global Navigation Satellite Systems(GNSS). Even though BOC signals can bring several advantages such as better track performance and higher positioning accuracy, there is a drawback that the autocorrelation functions have multiple side-peaks if BOC modulation is adopted. This characteristic will lead to false acquisition and the tracking loop will be locked in false phase point. The proposed Correlation Combination Ambiguity Removing Technology(CCART) cancelled all the side-peaks of the sine-phased BOC(kn,n) signals completely by making use of two kinds of correlation functions. Two kinds of sub-correlation functions were combined separately and then final correlation function without side-peaks was acquired. The simulation results are given and compared with other techniques. It is shown that acquisition will not be degraded with the increase of k. 展开更多
关键词 GNSS unambiguous acquisition sine-phased BOC(kn n) combination ofcorrelation functions
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Construction of plateaued functions satisfying multiple criteria 被引量:7
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作者 张卫国 《High Technology Letters》 EI CAS 2005年第4期364-366,共3页
A class of plateaued functions has been got by using the Maiorana-McFarland construction. A variety of desirable criteria for functions with cryptographic application eouht be satisfied: balancedness, high nonlineari... A class of plateaued functions has been got by using the Maiorana-McFarland construction. A variety of desirable criteria for functions with cryptographic application eouht be satisfied: balancedness, high nonlinearity, correlation immunity of reasonably high order, strict avalanche criterion, non-existence of non-zero linear struetures, good glnbal avalanche characteristics, etc. 展开更多
关键词 CRYPTOGRAPHY boolean functious NONLINEARITY correlation-immunity strict avalanche criterion global avalanche characteristics
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