研究方向：扩频通信中的序列设计，编码理论

代表性成果：

1. Xu C Q. Bounds and constructions of optimal optical orthogonal codes with low correlation zone. Science in China Series F Information Sciences, 2019, 62(10): 209304:1-209304:3.

2. Liu Tao,Xu Chengqian, Li Yubo. Multiple Complementary Sequence Sets With Low Inter-Set Cross-Correlation Property.IEEE Signal Processing Letters, 2019, 26(6):913-917.

3. Tao Liu,  Chengqian Xu, Yubo Li.  Constructions of zero correlation zone sequence sets with low cross-correlation property. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2017,  E100A( 7):1583-1587.

4. Tao LIU, Chengqian XU，Yubo LI，Xiaoyu CHEN. New Constructions of Multiple Binary ZCZ Sequence Sets with Inter-Set Zero Cross-Correlation Zone. IEICE TRANS. FUNDAMENTALS, 2017，E100A(12)：3007-3015.  

5. Tao LIU, Chengqian XU, Yubo LI, Kai LIU. New Perfect Gaussian Integer Sequences from Cyclic Difference Sets. IEICE TRANS. FUNDAMENTALS, 2017,E100A(12): 3067-3070.

6.Xu, Chengqian , Chen, Xiaoyu, Liu, Kai. New constructions of perfect 8-QAM+/8-QAM sequences, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2014, E97-A(4):1012-1015.

7. Peng, Xiuping， Xu, Chengqian.   New constructions of perfect gaussian integer sequences of even length, IEEE Communications Letters, 2014, 18 (9):1547-1550.

8. Xu, Chengqian; Peng, Xiuping; Liu, Kai. Perfect gaussian integer sequence pairs, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2014, E97-A(7):1568-1575.

9. Chen Xiaoyu, Xu Chengqian ,Li Yubo. A new method for constructing quaternary sequence sets with low correlation zone. IEEE Communications Letters,2013, 17(5):952-955.

10. Chen Xiaoyu, Xu Chengqian, Li Yubo, Liu Kai. Construction of shift distinct sequence sets with zero or low correlation zone. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2013,E96-A(1):377-382. 

11. Peng Xiu Ping,   Xu Chengqian, Liu, Kai. Almost quadriphase sequences with even period and low autocorrelation. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2012,E95-A(4):832-834.

12. Xu Chengqian,  Li Yubo, Liu Kai. Chen Xiaoyu. Construction of optimal low correlation zone sequence sets based on DFT matrices. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2012, E95-A(10):1796-1800.

13. Peng Xiuping, Xu Chengqian,  Arasu, K.T.. New families of binary sequence pairs with two-level and three-level correlation. IEEE Transactions on Information Theory, 2012, 58(11):6968-6978.

14. Yubo Li, Chengqian Xu, Kai Liu. Construction of Mutually Orthogonal Zero Correlation Zone Polyphase Sequence Sets. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences,2011,E94-A(4):1159-1164.

15. Peng Xiuping, Xu Chengqian, Li Gang, Liu Kai,Arasu Krishnasamy Thiru. The constructions of almost binary sequence pairs and binary sequence pairs with three-level autocorrelation. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2011, E94-A(9):1886-1891.

1. Xu C Q. Bounds and constructions of optimal optical orthogonal codes with low correlation zone. Science in China Series F Information Sciences, 2019, 62(10): 209304:1-209304:3

2. Liu Tao,Xu Chengqian, Li Yubo. Multiple Complementary Sequence Sets With Low Inter-Set Cross-Correlation Property.IEEE Signal Processing Letters, 2019, 26(6):913-917

3. Tao Liu,  Chengqian Xu, Yubo Li.  Constructions of zero correlation zone sequence sets with low cross-correlation property. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2017,  E100A( 7):1583-1587.

4. Tao LIU, Chengqian XU，Yubo LI，Xiaoyu CHEN. New Constructions of Multiple Binary ZCZ Sequence Sets with Inter-Set Zero Cross-Correlation Zone. IEICE TRANS. FUNDAMENTALS, 2017，E100A(12)：3007-3015.  

5. Tao LIU, Chengqian XU, Yubo LI, Kai LIU. New Perfect Gaussian Integer Sequences from Cyclic Difference Sets. IEICE TRANS. FUNDAMENTALS, 2017,E100A(12): 3067-3070.

6.Xu, Chengqian , Chen, Xiaoyu, Liu, Kai. New constructions of perfect 8-QAM+/8-QAM sequences, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2014, E97-A(4):1012-1015

7. Peng, Xiuping， Xu, Chengqian.   New constructions of perfect gaussian integer sequences of even length, IEEE Communications Letters, 2014, 18 (9):1547-1550

8. Xu, Chengqian; Peng, Xiuping; Liu, Kai. Perfect gaussian integer sequence pairs, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2014, E97-A(7):1568-1575

9. Chen Xiaoyu, Xu Chengqian ,Li Yubo. A new method for constructing quaternary sequence sets with low correlation zone. IEEE Communications Letters,2013, 17(5):952-955

10. Chen Xiaoyu, Xu Chengqian, Li Yubo, Liu Kai. Construction of shift distinct sequence sets with zero or low correlation zone. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2013,E96-A(1):377-382, 

11. Peng Xiu Ping,   Xu Chengqian, Liu, Kai. Almost quadriphase sequences with even period and low autocorrelation. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2012,E95-A(4):832-834

12. Xu Chengqian,  Li Yubo, Liu Kai. Chen Xiaoyu. Construction of optimal low correlation zone sequence sets based on DFT matrices. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2012, E95-A(10):1796-1800

13. Peng Xiuping, Xu Chengqian,  Arasu, K.T.. New families of binary sequence pairs with two-level and three-level correlation. IEEE Transactions on Information Theory, 2012, 58(11):6968-6978