基于PSWF滤波器的非正弦正交调制时域系统频谱优化

Proceedings of the International Conference on High Performance Compilation, Computing and Communications Pub Date : 2017-03-22 DOI:10.1145/3069593.3069603

M. Zhongyang, Liu Xiao, Liu Chuanhui

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引用次数: 1

摘要

为了改善非正弦正交时域调制(NOMTD)系统的频谱特性，设计并利用了长球面波函数(PSWF)滤波器。在频谱优化之前，对PSWF滤波器、Blackman滤波器和Kaiser滤波器进行比较，设计出综合性能最好的滤波器。研究和比较了诸如频谱、pswf之间的正交化以及误码率等参数，以验证滤波的效果。主要结果表明，与传统滤波器相比，PSWF滤波器是最好的滤波器，滤波是改善系统光谱特性的有效方法。仿真结果表明，经过PSWF滤波后，调制信号的频谱明显改善。频谱旁瓣提升约75dB。此外，PSWF滤波器处理的系统比Kaiser滤波器处理的系统具有更多的优点。

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The Spectrum Optimizing of Nonsinusoidal Orthogonal Modulation in Time and Domain System Based on PSWF Filter

Prolate Spheroidal Wave Function (PSWF) filter is designed and utilized to improve the spectral characteristic of Nonsinusoidal Orthogonal Modulation in Time and Domain (NOMTD) system. Before spectrum optimizing, comparison among PSWF filter, Blackman filter as well as Kaiser filter is conducted to design a filter with the best comprehensive performance. Parameters such as spectrum, orthogonalization between PSWFs as well as BER performance are investigated and compared to verify the effect of filtering. The main result is to demonstrate that PSWF filter is the best filter compared with conventional filters and filtering is a effective method to improve the spectral characteristic of system. Simulation result shows that the spectrum of modulation signal is distinctly improved by PSWF filter. The promotion of sidelobe of spectrum is approximately 75dB. In addition, system processed by PSWF filter has more advantages over system processed by Kaiser filter.

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Proceedings of the International Conference on High Performance Compilation, Computing and Communications

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