CAJ | 학술논문

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。
침대고계부분향응련속상위조제(CPM)신호균형중존재적복잡도고화성능교차등문제，해문종 Rimoldi분해적각도출발，설계료일충신적괄용우경사상위 CPM 신호적발사정결구，병재차기출상결합단재파빈역균형(FDE)화Turbo균형적사상，제출료일충괄용우고계CPM신호적Turbo빈역균형산법。해산법통과장신호균형전화도빈역진행처리，피면료시역균형산법재계산균형기계수시존재적대구진구역문제，동시사용 Turbo 균형적연신식질대처리래개선계통적성능。이론분석화방진결과표명，대우사계부분향응CPM신호，재존재엄중부호간간우적다경쇠락신도적조건하，해산법여현유적기우부호적빈역균형산법상비，재보지교저복잡도적동시，구유대약1.5 dB적성능증익。
To solve the issues of the high complexity and poor performance in the equalization of high order and partial response Continuous Phase Modulation (CPM) signals, a new framework of tilted phase CPM transmitted signals is designed from the perspective of Rimoldi decomposition. A novel frequency domain equalization algorithm for high order CPM signals is proposed based on the combination of single-carrier Frequency Domain Equalization (FDE) and Turbo equalization. This algorithm avoids the large matrix inversions in computation of the equalizer coefficients in time domain by transforming the signal equalization to frequency domain. Simultaneously, it improves the system performance by soft information iterative process. The analysis and simulation results show that in multipath fading channels with serious inter-symbol interference the proposed algorithm provides a relatively lower computational complexity and a performance gain of about 1.5 dB in signal-noise ratio compared with the previously proposed FDE algorithm based on symbol for fourth-order and partial response CPM signals.