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| A Novel Time-Hopping Multiple-Access DCSK System Designing and Analysis |
| Li Hui①②; Song Yao-liang①; Yang Yu-wang① |
①School of Electronic Engineering and Optoelectronic Technology,
Nanjing University of Science and Technology, Nanjing 210094, China;②School of Electrical Engineering & Automation, Henan Polytechnic University, Jiaozuo 454010, China |
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Abstract The common multiple-access schemes for Differential Chaos Shift Keying (DCSK) system have two disadvantages. Firstly, all users share the same slot, only method to decrease multiple-access interference is utilizing the low correlativity of chaotic signal. Secondly, the transmitted signals for reference and symbol are not same or reverse, so the strong anti-multipath character is destroyed. A novel time-hopping multiple-access scheme for DCSK system is put forward. It assigns different PN time-hopping codes to different users. The signals for reference and symbol in a frame have the same time-hopping value. In AWGN channel the system’s bit error rate is obtained in theory. Analysis and simulation show that time-hopping multiple-access scheme can overcome above two disadvantages and has lower bit error rate.
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Received: 17 October 2007
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2009, Vol. 31 
