基于Rimoldi分解的连续相位调制信号Turbo频域均衡算法

发布时间：2018-04-26 23:29

本文选题：无线通信 + 连续相位调制　；参考：《电子与信息学报》2014年05期

【摘要】：针对高阶部分响应连续相位调制(CPM)信号均衡中存在的复杂度高和性能较差等问题,该文从Rimoldi分解的角度出发,设计了一种新的适用于倾斜相位CPM信号的发射帧结构,并在此基础上结合单载波频域均衡(FDE)和Turbo均衡的思想,提出了一种适用于高阶CPM信号的Turbo频域均衡算法。该算法通过将信号均衡转化到频域进行处理,避免了时域均衡算法在计算均衡器系数时存在的大矩阵求逆问题,同时使用Turbo均衡的软信息迭代处理来改善系统的性能。理论分析和仿真结果表明,对于四阶部分响应CPM信号,在存在严重符号间干扰的多径衰落信道的条件下,该算法与现有的基于符号的频域均衡算法相比,在保持较低复杂度的同时,具有大约1.5 dB的性能增益。
[Abstract]:Aiming at the problems of high complexity and poor performance in high order partial response continuous phase modulation (CPM) signal equalization, this paper designs a new transmit frame structure suitable for skew phase CPM signal from the angle of Rimoldi decomposition. On this basis, combining the idea of single-carrier frequency-domain equalization and Turbo equalization, a Turbo frequency-domain equalization algorithm suitable for high-order CPM signals is proposed. By converting the signal equalization to frequency domain, the algorithm avoids the problem of large matrix inversion when calculating the equalizer coefficients in time domain equalization algorithm. At the same time, the soft information iterative processing of Turbo equalization is used to improve the performance of the system. Theoretical analysis and simulation results show that for fourth-order partial response CPM signals, the proposed algorithm is compared with existing signal-based frequency-domain equalization algorithms in the presence of severe inter-symbol interference (ISI) multipath fading channels. The performance gain is about 1.5 dB while maintaining low complexity.
【作者单位】：解放军信息工程大学信息系统工程学院;
【基金】：国家自然科学基金(61072046) 河南省基础与前沿项目(102300410008)资助课题
【分类号】：TN911.3

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