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- Title
多用户多级降噪相关延迟移位键控通信系统.
- Authors
贺 利 芳; 陈 茜; 张 刚
- Abstract
A multi-user multi-level noise reduction correlation delay shift keying (MUM-NR-CDSK) communication system is proposed. The system maps the M-ary information of each user to different transmission coefficients, and then carries the message bearing signals modulated by Walsh code through different carriers. A moving average filter is added to the receiver to reduce the bit error rate of the system, which solves the problems of high bit error rate and low transmission efficiency when multiple-access M-ary frequency modulated differential chaos shift keying (MAMA-FM-DCSK) communication system adopts multiple electrical level mode to transmit M-ary information. Simulation results show that compared with other systems, the transmission rate of the MUM-NR-CDSK system is increased by 8 times, and the bit error performance is improved by nearly 9 dB, so it has greater value in practical application.
- Subjects
HADAMARD codes; BIT error rate; TELECOMMUNICATION systems; NOISE control; MOVING average process; ERROR rates
- Publication
Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao, 2023, Vol 63, Issue 2, p205
- ISSN
1000-8608
- Publication type
Article
- DOI
10.7511/dllgxb202302012