Search Results - "Haijun Leng"

NHC-catalysed retro-aldol/aldol cascade reaction enabling solvent-controlled stereodivergent synthesis of spirooxindoles by Leng, Haijun, Zhao, Qian, Mao, Qing, Liu, Shuaijiang, Luo, Menglan, Qin, Rui, Huang, Wei, Zhan, Gu

“…An N-heterocyclic carbene (NHC)-catalysed retro-aldol/aldol cascade reaction of spirooxindole-based β-hydroxyaldehyde has been developed. The…”
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Frequency Offset Estimation for Optical Coherent M-QAM Detection Using Chirp z-Transform by Leng, Haijun, Yu, Song, Li, Xin, Lan, Mingying, Liao, Ping, Wang, Tianyi, Gu, Wanyi

“…The chirp z-Transform (CZT) is introduced to replace the traditional gradient descent (GD) in frequency offset estimation for digital coherent quadrature…”
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Constant Envelop Minimum-Shift Keying OFDM Coherent Optical Communication System by Yang, Zhanyu, Yu, Song, Chen, Longquan, Leng, Haijun, Lan, Mingying, Qiao, Yaojun, Gu, Wanyi

“…In this paper, we propose a constant envelop minimum-shift keying orthogonal frequency division multiplexing (CE-MSK-OFDM) modulation scheme. This scheme can…”
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Mitigation of the Interference Between Odd and Even Terms in Optical Fast OFDM Scheme Based on Interleaved Multiplexing by Wang Long, Jie Zhang, Daobin Wang, Jiawei Han, Sai Chen, Han, A. M., Guanjun Gao, Haijun Leng, Lei Liu, Wei Zhu, Yongli Zhao, Wanyi Gu

“…In this letter, the modulation and demodulation mechanisms of the discrete Fourier transform-based optical fast orthogonal frequency-division multiplexing…”
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Frequency estimation for optical coherent M-QAM system without removing modulated data phase by Yu, Song, Cao, Yinwen, Leng, Haijun, Wu, Guohua, Gu, Wanyi

“…For optical coherent M-ary quadrature amplitude modulation (M-QAM) system, the frequency offset can be extracted directly by applying Fast Fourier Transform…”
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