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双选信道下一种基于混沌交织的FBMC系统
农茜雯,谢跃雷,杨子靖
0
(桂林电子科技大学 宽带与智能信息技术中心,广西 桂林 541004)
摘要:
高速移动环境下,无线信道具有时频双选性衰落的特性,使得滤波器组多载波(Filter Bank Multi-carrier,FBMC)系统产生长突发差错。将一种基于Baker映射的混沌交织算法应用在滤波器组多载波系统中,根据混沌密钥对发送数据进行分块和重新排列,按照Baker映射规则完成数据交织。此方法可以将长突发差错变为单突发差错,结合卷积编码能有效地纠正双选信道产生的长突发差错。仿真结果表明,在双选择信道中,基于混沌交织的滤波器组多载波系统误比特率性能优于传统基于块交织的滤波器组多载波系统。
关键词:  滤波器组多载波系统  双选信道  混沌交织  Baker映射  长突发差错
DOI:
基金项目:国家自然科学基金资助项目(61461015);广西自然科学基金项目(2015GXNSFAA139302)
A chaotic interleaving algorithm based FBMC system in doubly selective channels
NONG Qianwen,XIE Yuelei,YANG Zijing
(Research Center for Wideband and Intelligence Information Technology,Guilin University of Electronic Technology,Guilin 541004,China)
Abstract:
The filter bank multi-carrier(FBMC) systems suffer long burst error in high-mobile scenario where the wireless channel has the characteristic of time-frequency selective fading.A chaotic interleaving algorithm based on Baker mapping is applied to the FBMC system.The transmitted data is segmented and rearranged according to the chaotic key,and data interleaving is completed according to the Baker mapping rule.This method can change long burst errors into single burst errors and also effectively correct long burst errors generated by dual channel selection by combining with convolutional coding.The simulation results show that in the dual-selective channels,the bit error rate(BER) performance of the FBMC system based on chaotic interleaving is better than that of FBMC system based on the traditional block-interleaving.
Key words:  filter bank multi-carrier(FBMC) system  double-selective channels  chaotic interleaving  Baker map  long burst error
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