Design and Performance Analysis of MISO-SRMR-DCSK System over Rayleigh Fading Channels

The major drawback of the differential chaos shift keying (DCSK) system is that equal time and energy are spent on the reference and data signal. This paper presents the design and performance analysis of a short reference multifold rate DCSK (SRMR-DCSK) system to overcome the major drawback. The SRMR-DCSK system is proposed to enhance the data rate of the short reference differential chaos shift keying (SR-DCSK) system. By recycling each reference signal in SR-DCSK, the data slot carries N bits of data and by P times. As a result, compared with SR-DCSK, the proposed system has a higher data transmission rate and evaluates the energy efficiency with respect to the conventional DCSK system. To further improve the bit-error-rate (BER) performance over Rayleigh fading channels, the multiple-input single-output SRMR-DCSK (MISO-SRMR-DCSK) is also studied. The BER expression of the proposed system is derived based on Gaussian approximation (GA), and simulations in Rayleigh fading channels are performed. Simulation results show a perfect match with the analytical expression.

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Design and Performance Analysis of MISO-ORM-DCSK System over Rayleigh Fading Channels

International Journal of Antennas and Propagation ◽

10.1155/2016/8459109 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8

Author(s):

Gang Zhang ◽

Chuan gang Wang ◽

Guo quan Li ◽

Jin zhao Lin

Keyword(s):

Fading Channels ◽

Bit Error Rate ◽

Fading Channel ◽

Rayleigh Fading ◽

Rayleigh Fading Channels ◽

Decision Variables ◽

Shift Keying ◽

Simulation Results ◽

And Performance ◽

Chaos Shift Keying

A novel chaotic communication system, named Orthogonality-based Reference Modulated-Differential Chaos Shift Keying (ORM-DCSK), is proposed to enhance the performance of RM-DCSK. By designing an orthogonal chaotic generator (OCG), the intrasignal interference components in RM-DCSK are eliminated. Also, the signal frame format is expanded so the average bit energy is reduced. As a result, the proposed system has less interference in decision variables. Furthermore, to investigate the bit error rate (BER) performance over Rayleigh fading channels, the MISO-ORM-DCSK is studied. The BER expressions of the new system are derived and analyzed over AWGN channel and multipath Rayleigh fading channel. All simulation results not only show that the proposed system can obtain significant improvement but also verify the analysis in theory.

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Noise Reduction Multi-Carrier Differential Chaos Shift Keying System

Journal of Circuits System and Computers ◽

10.1142/s021812661850233x ◽

2018 ◽

Vol 27 (14) ◽

pp. 1850233 ◽

Cited By ~ 1

Author(s):

Hong Min Zhou ◽

Ying Zhang ◽

Ying Yu

Keyword(s):

Noise Reduction ◽

Fading Channels ◽

Performance Improvement ◽

Rayleigh Fading ◽

Additive White Gaussian Noise ◽

Rayleigh Fading Channels ◽

Receiver Side ◽

Shift Keying ◽

Chaos Shift Keying ◽

Differential Chaos Shift Keying

In multi-carrier differential chaos shift keying (MC-DCSK) system, channel noises pollute both the reference and data signals, resulting in deteriorated performance. To reduce noises in received signals in MC-DCSK, a novel noise reduction MC-DCSK (NR-MC-DCSK) system is proposed in this paper. The proposed system utilizes duplicated chaotic samples, rather than different ones, as the reference. At the receiver side, identical samples can be averaged before correlation detection, which helps decrease the noise interferences and thus brings performance improvement. Theoretical bit error rate (BER) expressions are derived and verified by simulation results for additive white Gaussian noise and multipath Rayleigh fading channels. Finally, comparisons to MC-DCSK and other DCSK-based systems are given to confirm the superiority of the proposed system in BER performance.

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