摘要
移动卫星通信信道的多普勒效应会产生强烈的发生码间干扰和相位失衡,导致移动通信质量降低。传统方法采用单模判决神经模糊系统对信道进行盲均衡处理,虽然能克服卫星信道的幅度畸变,但无法消除码间干扰和相位偏转畸变。提出一种具有判决反馈结构的模糊控制下多模移动卫星信道盲均衡算法,通过模糊控制自适应调整变量因子抽头系数,保证了算法快速收敛,并纠正了相位偏转,抑制码间干扰。仿真实验表明,采用该算法进行移动卫星通信盲均衡信道优化设计,移动通信质量提高明显。
The Doppler effect of satellite communication channel will have a strong inter symbol interference and phase im-balance, resulting in lower quality communication. The traditional method used single mode decision neural fuzzy inference system for blind equalization of the channel, although it can overcome the amplitude distortion of the satellite channel, but cannot eliminate the inter symbol interference and phase deflection distortion. A decision feedback structure of fuzzy con-trol for multi satellite channel blind equalization algorithm was proposed, the fuzzy control was used to adjust variable fac-tor coefficients, the algorithm converged rapidly, and corrected the phase deflection, suppressed inter symbol interference. Simulation results show that, the algorithm can be used in mobile satellite communication blind equalization channel opti-mization design, the communication quality is improved obviously.
出处
《科技通报》
北大核心
2014年第8期173-175,共3页
Bulletin of Science and Technology
基金
山东省自然科学基金(2008CDZ088)
关键词
卫星信道
均衡
反馈结构
码间干扰
satellite channel equilibrium feedback inter symbol interference
