The Journal of China Universities of Posts and Telecommunications ›› 2021, Vol. 28 ›› Issue (2): 89-96.doi: 10.19682/j.cnki.1005-8885.2021.1008

Previous Articles    

New spatial quadrature modulation scheme for indoor visible light communication systems 

Li Zongyan, Li Jiahui, Yu Honglu, Li Shiyin   

  1. School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • Received:2019-06-17 Revised:2020-12-15 Online:2021-04-30 Published:2021-04-30

Abstract: In this paper, a new spatial quadrature modulation ( NSQM ) scheme is proposed to improve the error
performance of indoor visible light communication ( VLC) systems. NSQM is different from generalized spatial
quadrature modulation ( SQM) in two aspects. First, the transmitted optical signal is directly detected at the
receiver, which does not need to estimate the indices of the transmitted antenna. Second, an optimization approach
is used with NSQM to minimize the upper error bound of the transmitted signals. In addition, several NSQM
schemes are described in detail. Numerical results show that the proposed NSQM scheme achieves superior error
performance compared with the SQM scheme.

Key words: visible light communication (VLC), new spatial quadrature modulation (NSQM), upper bound 

CLC Number: