An Improved Scheme for Noise Reduction to DCSK Based on its Retransmission Characteristic
In chaos communication schemes, the differential chaos shift keying(DCSK) is a noncoherent scheme with correlation detector. In spite of this there is currently no established procedures attaching importance to the correlation of noises within a code period, which is one of the reasons for the degradation of performance of DCSK system. This paper put forward an improved scheme for noise reduction to DCSK communication system based on its retransmission characteristic. By exploiting the fact that the adjacent noise in the channel is correlated, the proposed scheme adds a phase inversion device at the receiver. The demodulation of improved DCSK scheme is also achieved by a correlation detector. Both the theoretical analysis and the simulation results show that the proposed scheme can greatly improve the BER performance of communication systems, especially for low signal-to-noise ratio (SNR). The proposed scheme can be applied to the systems having a high requirement on data transmission reliability but suffering from hostile communication channels, such as the lowvoltage power line(L-PLC) communication systems.
chaos communication DCSK phase inversion L-PLC
WANG Zhenchao ZHANG Shibing
College of Electronic and Information Engineering Hebei University Baoding, Hebei Province, China, 071002
国际会议
第四届国际计算机新科技与教育学术会议(2009 4th International Conference on Computer Science & Education)
南京
英文
366-370
2009-07-25（万方平台首次上网日期，不代表论文的发表时间）