Quadrature Multicarrier Noise Reduction Differential Chaos Shift Keying System

Lifang HE; Xueshuang WU; Tianqi ZHANG

doi:10.11999/JEIT200068

Volume 43 Issue 4

Apr. 2021

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Lifang HE, Xueshuang WU, Tianqi ZHANG. Quadrature Multicarrier Noise Reduction Differential Chaos Shift Keying System[J]. Journal of Electronics & Information Technology, 2021, 43(4): 1120-1128. doi: 10.11999/JEIT200068

Citation:

Lifang HE, Xueshuang WU, Tianqi ZHANG. Quadrature Multicarrier Noise Reduction Differential Chaos Shift Keying System[J]. Journal of Electronics & Information Technology, 2021, 43(4): 1120-1128. doi: 10.11999/JEIT200068

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Quadrature Multicarrier Noise Reduction Differential Chaos Shift Keying System

doi: 10.11999/JEIT200068

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Natural Science Foundation of China (61771085, 61371164), The Research Project of Chongqing Educational Commission (KJ1600407, KJQN201900601)

Received Date: 2020-01-16
Rev Recd Date: 2020-07-07

Available Online: 2020-07-22

Publish Date: 2021-04-20

Abstract

Abstract

The major drawbacks of MultiCarrier Differential Chaos Shift Keying (MC-DCSK) system are relating to low data rate and poor bit error performance. Therefore a Quadrature MultiCarrier Noise Reduction Differential Chaos Shift Keying (QMC-NR-DCSK) system is proposed to improve the performances of MC-DCSK system. At the transmitter, reference signal is transmitted on the predefined carrier. While the remaining M-1 carriers and the carriers with orthogonal phase at the same frequency are all used to transmit information signals by using Quadrature Modulation technology, and the data-rate to bandwidth ratio and transmission rate of which are four times higher than that of MC-DCSK system by further introducing Hilbert transformation. The noise reduction operation of the moving average filter is introduced to reduce the variance of noise at the receiver, thereby improving the bit error performance of the QMC-NR-DCSK system. The bit error rate formula and simulations of QMC-NR-DCSK system under Additive White Gaussian Noise (AWGN) channel and multi-path Rayleigh Fading Channel (RFC) are carried out respectively. The results show that QMC-NR-DCSK system can effectively improve the transmission rate, data-rate to bandwidth ratio and bit error performance, which provides a theoretical reference for the application of the multicarrier communication systems.
- Chaotic communication,
- Multicarrier modulation,
- Quadrature modulation,
- Moving average filter,
- Hilbert transform,
- Transmission rate

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References(17)

References

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