| 卫星高速数据传输中低误差抑制均衡算法 |
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| 引用本文： | 王心霖,;刘彬,;李海滨.卫星高速数据传输中低误差抑制均衡算法[J].燕山大学学报,2014(3):259-266. |
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| 作者姓名： | 王心霖 ;刘彬 ;李海滨 |
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| 作者单位： | [1]燕山大学 信息科学与工程学院,河北秦皇岛066004; [2]燕山大学 工业计算机控制工程河北省重点实验室,河北秦皇岛066004 |
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| 基金项目： | 河北省自然科学基金资助项目（D2013203363） |
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| 摘 要： | 幅相键控调制系统中,为消除码间干扰,并解决高阶调制信号多模值的匹配问题,本文基于均衡器输出功率的线性变换定义新的代价函数,使用抑制低误差函数项的方法构造新的梯度函数,进而提出了新的均衡算法。该算法通过解决信号多模值与算法散度常量的匹配问题,提高收敛速度和降低稳态均方误差;通过抑制低误差函数项的方法,保证收敛过程的稳定。仿真结果表明,针对16-APSK调制信号,本文算法在保证收敛稳定性的同时,其均衡性能较恒模算法也有显著的提高。
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| 关 键 词： | 恒模算法 盲均衡 功率变换 误差函数 |
A new equalization algorithm based on low error restraint for satellite high-speed data transmission system |
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| Institution: | WANG Xin-lin, LIU Bin, LI Hai-bin( College of Information Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China; Key Lab ofIndustrial Computer Control Engineering of Hebei Province, Yanshan University, Qinhuangdao, Hebei 066004, China) |
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| Abstract: | To eliminate inter-symbol interference and match the multi-modulus of high-ordered modulation signals, a new constant modulus algorithm is proposed for the Amplitude Phase Shift Keying system. The algorithm includes both a new cost function de-fined by changing the power of equalizer output and a new gradient function defined by restraining the low error function. The per-formance of proposed algorithm is improved by matching the dispersion constant of algorithm and the multi-modulus of high-order modulation signals. The algorithm becomes robust by restraining low error function term. Simulation results with 16-APSK modu-lation models demonstrate that the proposed algorithm obtains better performance on the residual inter-symbol interference and the convergence rate than other algorithms. |
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| Keywords: | constant modulus algorithm blind equalization power transform error function |
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