A Family of Single-Channel Spectrally-Null-Constrained Sequences With Low Correlation

A Family of Single-Channel Spectrally-Null-Constrained Sequences With Low Correlation
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一族低相关性单通道谱空约束序列

DOI:
10.1109/lsp.2020.3023858
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发表时间:
2020-09
影响因子:
3.9
通讯作者:
Yubo Li
Yubo Li
中科院分区:
工程技术2区
文献类型:
--
作者:
Liying Tian;Chengqian Xu;Yubo Li

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谱约束序列具有良好的相关特性,在谱约束下具有较低的谱功率,在通信和非连续载波或频隙上工作的雷达系统中有着广泛的应用。本文提出了一种具有良好相关性的单信道频谱零约束序列族的构造方法。根据所提出的结构,可以得到周期为<inline-formula><tex-math notation="LaTeX">$N(N$</tex-math></inline-formula>+ 1),族大小为<inline-formula><tex-math notation="LaTeX">$(p-1)$的</tex-math></inline-formula>单通道多相SNCS族,该SNCS族在频谱约束<inline-formula><tex-math notation="LaTeX">$\lbrace 1+a(N+1):a\in \mathbb {Z}_N\rbrace$下</tex-math></inline-formula>具有零功率泄漏,其中<inline-formula><tex-math notation="LaTeX">$N$</tex-math></inline-formula>是奇数,<inline-formula><tex-math notation="LaTeX">$p$</tex-math></inline-formula>是<inline-formula><tex-math notation="LaTeX">$N$</tex-math></inline-formula>的最小素因子.注意,所导出的单通道SNCS族的最大周期相关幅度为<inline-formula><tex-math notation="LaTeX">$(N+1)$</tex-math></inline-formula>,其随着<inline-formula><tex-math notation="LaTeX">$p$的</tex-math></inline-formula>增加而渐进地达到相关下限。
Spectrally-constrained sequences (SCSs) with good correlation properties, and low spectral power under the spectral constraint have found many practical applications in communication, and radar systems operating over non-contiguous carriers or frequency slots. In this letter, a construction of single-channel spectrally-null-constrained sequence (SNCS) families with good correlation is proposed. Following the proposed construction, a single-channel polyphase SNCS family with period <inline-formula><tex-math notation="LaTeX">$N(N$</tex-math></inline-formula> + 1), and family size <inline-formula><tex-math notation="LaTeX">$(p-1)$</tex-math></inline-formula> can be obtained, which has zero power leakage under the spectral constraint <inline-formula><tex-math notation="LaTeX">$\lbrace 1+a(N+1):a\in \mathbb {Z}_N\rbrace$</tex-math></inline-formula>, where <inline-formula><tex-math notation="LaTeX">$N$</tex-math></inline-formula> is an odd integer, and <inline-formula><tex-math notation="LaTeX">$p$</tex-math></inline-formula> is the minimum prime factor of <inline-formula><tex-math notation="LaTeX">$N$</tex-math></inline-formula>. Note that the maximum periodic correlation magnitude of the derived single-channel SNCS family is <inline-formula><tex-math notation="LaTeX">$(N+1)$</tex-math></inline-formula>, which asymptotically achieves the correlation lower bound as <inline-formula><tex-math notation="LaTeX">$p$</tex-math></inline-formula> increasing.
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