摘要
现代高速卫星通信、遥感,以及远程侦查无人机的数据传输速率可达Mb/s甚至Gb/s,码间干扰和群延时不可忽视。针对卫星通信的应用,提出了一种易于实现的Laguerre算法,和有利于消除码间干扰和群时延的分数间隔结构,设计出了一种高效地盲均衡器。Laguerre算法采用有限的滤波阶数,就可以达到IIR长脉冲滤波的效果;而分数间隔均衡器(FSE)能够降低采样相位敏感性,可以有效改善由于位同步相位误差造成的性能损失,分数间隔均衡器的设计目标立足于具有较好性能和易于工程上FPGA的实现。文中通过仿真均衡前后误码增益,得到几种不同信道下的均衡器的性能理论曲线,可以为高速数传均衡器设计提供有益参考。
The data rate of modern high-speed satellite communications,tracking and remote detection of UAVs,could be up to Mbps or even Gbps,and ISI and group delay could also not be ignored.For the application of satellite high-speed data transmission,this paper proposes an easy-to-implement Laguerre algorithm and fractional interval structure,which is beneficial to eliminating the inter-symbol interference and group delay,and gives the design of an efficient blind equalizer.Laguerre algorithm,with a limited number of filter order,could achieve the effect of long-pulse filter of IIR;fractionally spaced equalizer（FSE） could reduce the sensitivity of sampling phase,improve performance loss caused by phase error of bit synchronization.The design of fractionally spaced equalizer is based on the good engineering performance and the easiness of FPGA implementation.Based on BER gains before and after the simulated equilibrium,the performance theoretical curves of the equalizers under different channels are obtained.This could provide a useful reference for the equalizer design of high-speed data transmission.
出处
《通信技术》
2011年第2期1-3,共3页
Communications Technology
