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- Chengqian Xu, Kai Liu, Gang Li, Wangbo Yu
- 2007 International Conference on Wireless…
- 2007

The uniqueness of the binary sequence pair with two- level autocorrelation functions (BSPT) is put forward in the paper and proved by using mathematic tools, which is of great importance in guaranteeing receiving uniquely when applying BSPTs. Some construction methods of BSPT are given. The infinite families of BSPTs are presented by applying construction… (More)

- Kai Liu, Chengqian Xu, K. T. Arasu
- 2009 Fourth International Workshop on Signal…
- 2009

Based on the equivalent relationship between binary sequence pairs with two-level periodic autocorrelation function (BSPT) and difference set pairs (DSP), several families of BSPT including perfect binary sequence pairs are constructed by recursively constructing DSP on the integer ring.

- Xiuping Peng, Chengqian Xu, Krishnasamy Thiru Arasu
- IEEE Transactions on Information Theory
- 2012

A pair of binary sequences is generalized from the concept of a two-level autocorrelation function of a single binary sequence. In this paper, new families of binary sequence pairs with period N = np, where gcd(n,p) = 1, and optimal correlation values -1 are constructed, as well as new families of binary sequence pairs with three-level correlation and… (More)

- Yubo Li, Chengqian Xu, Nan Jing, Kai Liu
- IEEE Communications Letters
- 2014

Based on orthogonal matrices, two constructions of Z-periodic complementary sequence set are introduced in this letter. The two proposed approaches can provide flexible choices for the flock size of the Z-periodic complementary sequence set, which cannot be obtained by known methods. The parameters of resultant Z-periodic complementary sequence sets are… (More)

- Xiuping Peng, Chengqian Xu
- IEEE Communications Letters
- 2014

- Kai Liu, Chengqian Xu
- IEICE Transactions
- 2010

- Yubo Li, Chengqian Xu, Kai Liu
- IEICE Transactions
- 2011

- Kai Liu, Chengqian Xu, Gang Li
- 2009 International Conference on Networks…
- 2009

This paper proposes a new construction method of binary sequence pair sets with zero correlation zone (ZCZ) in which the correlation functions of sequence pairs are zero, based on difference set pair, a new concept of combinatorial mathematics. With the extension of sequence length, the sets achieve the theoretical upper bound. These ZCZ sequence pairs can… (More)

- Yubo Li, Chengqian Xu
- IEEE Communications Letters
- 2012

In this letter, constructions of zero-correlation zone (ZCZ) sequence sets over the 8-QAM+ constellation are presented. The resultant ZCZ sequence sets have flexible parameters and are optimal with respect to the Tang-Fan-Matsufuji bound in some cases. These ZCZ sequences over the 8-QAM+ constellation can be used in quasi-synchronous CDMA (QS-CDMA)… (More)

- Yubo Li, Kai Liu, Chengqian Xu, Gang Li
- IEICE Transactions
- 2014