摘要
提出一种新的MPSK突发信号解调算法。首先利用突发信号的前导序列,采用联合帧同步与高精度载波校正技术,实现信号的快速捕获以及载波频偏校正;然后通过分数间隔均衡器实现定时和均衡;最后利用内置二阶锁相环的判决反馈均衡器去除残留码间干扰和载波相偏。仿真结果表明,在多径衰落信道条件下,与现有算法相比,本文算法误码性能提高,且具有计算复杂度低、收敛速度快等优点。
The demodulation of MPSK signals in HF burst communication is presented in this paper. The scheme exploits an accurate carrier estimation algorithm based on the FFT interpolation for carrier reeovery with the preamble sequence . It uses the fractionally-spaced equalizer （FSE） for time-recovery and equalization. To mitigate the Inter-symbol interference （ISI）, the paper takes the decision feedback equalizer （DFE） with DPLL. The performance of the system in multipath-fading channels was simulated. The results show that the scheme is with low complexity and high convergence rate and the performance is all right.
出处
《电子技术应用》
北大核心
2013年第2期107-110,共4页
Application of Electronic Technique
基金
国家自然科学基金资助项目(61072046)
河南省基础与前沿基金(1123004100322)
