多径信道下高速Chirp BOK平方律检测和均衡  

High speed Chirp BOK square law detection and equalization in multipath channel

作　　者：梁冬生[1] 仇洪冰[1] 郑霖[1] 樊孝明[1] 

机构地区：[1]桂林电子科技大学信息与通信工程学院,广西桂林541004

出　　处：《计算机应用研究》2013年第11期3462-3464,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(61071088);广西无线宽带通信与信号处理重点实验室基金资助项目(11105);桂林市科学研究与技术开发项目(20120104-3)

摘　　要：为了提高线性调频(Chirp)二进制正交键控(BOK)的抗多径干扰能力,提出使用平方律检测和均衡算法。平方律检测能够抵抗频偏和相偏对脉冲压缩的影响,降低系统复杂度和增强鲁棒性,在高频偏和多普勒频移扩展情况下性能下降不超过0.2 dB。分析了BOK平方律检测的均衡模型并论证了均衡的可行性,在高频偏和多普勒频移扩展的多径信道下验证了均衡和检测的性能。仿真结果表明,平方律检测引入均衡技术对系统性能有较大的改善。In order to improve anti-multipath interference debility of linear frequency modulation （Chirp） binary orthogonal keying （BOK）, this paper proposed an algorithm emploied square law detection and equalization. Square law detection could resist the influence on pulse compression caused by frequency offset and phase offset, to low complexity and enhance robust, its performance reduction was less than 02 dB in the condition of high frequency offset and doppler frequency shift extension. This paper analyzed the equalization model of BOK square law detection, demonstrated the feasibility of the equalization and corroborated the performance of equalization and detection in multipath channel with high frequency offset and doppler frequency shift extension. The simulation results indicate that introducing square law detection and equalization can efficiently improve system performance.

关 键 词：线性调频 二进制正交键控 平方律检测 均衡模型 

分 类 号：TN914[电子电信—通信与信息系统]