基于二元二值序列构造四元低相关区序列集
doi: 10.3724/SP.J.1146.2011.00980
Construction of Quaternary Low Correlation Zone Sequence Set Using Binary Sequence with Ideal Two-level Autocorrelation
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摘要: 该文基于长度为N=ML+r的具有理想二值自相关特性的二元序列，构造了一类四元低相关区序列集。得到的序列集参数如相关区长度和序列数目等在一定范围内可以灵活设定。当r0可以同时构造出多个具有相同参数的四元低相关区序列集。当r=0时得到的低相关区序列集中序列数目接近甚至达到理论界限。该文方法可以为准同步CDMA扩频通信系统提供更多的低相关区序列。Abstract: Based on a binary sequence with ideal two-level autocorrelation with period N=ML+r, a construction of quaternary Low Correlation Zone (LCZ) sequence set is proposed. The parameters of the resultant quaternary LCZ sequence sets such as length of LCZ and set size are flexible. When r0, multiple LCZ sets with the same parameters can be constructed, and when r=0, the set size of LCZ sequence set is optimal or almost optimal with respect to the theoretical bound. As a result, the proposed method can be used to construct more LCZ sequences suitable for QS-CDMA systems.
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