摘要
Turbo均衡技术能有效克服信道多径、消除符号间干扰(ISI),从而提高接收机整体性能。针对无人飞行器地空视距链路信道这种快时变多径信道,提出了一种联合信道估计和Turbo均衡的迭代接收算法。该算法采用单载波调制体制,通过信道估计和Turbo均衡之间相互反馈软信息来消除ISI。Matlab仿真结果表明,经过2次以上的迭代后,相比较于传统的单载波频域Turbo均衡算法,新算法的误码率性能得到了显著改善。
The Turbo equalization can effectively overcome multipath fading and eliminate Inter-Symbol-Interference（ ISI） to improve receiver performance.In view of such characteristics as fast time-varying and multi-path of UAV data link channel,an iterative receive algorithm of joint channel estimation and Turbo equalization is proposed.The algorithm uses single carrier modulation,and eliminates ISI by the feedback soft information between channel estimation and Turbo equalization. The Matlab simulation results show that the proposed algorithm can significantly improve the BER performance through more than 2 iterations compared with traditional Turbo equalization algorithm based on single carrier frequency domain.
出处
《无线电工程》
2016年第1期46-49,共4页
Radio Engineering
基金
国家部委基金资助项目
