Universal Filtered Multi-Carrier with Leakage-Based Filter Optimization
Universal Filtered Multi-Carrier with Leakage-Based Filter Optimization
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发表时间：
2014-05
期刊：
影响因子：
5.5
通讯作者：
Xiaojie Wang;T. Wild;F. Schaich;A. F. D. Santos
中科院分区：
文献类型：
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作者：
Xiaojie Wang;T. Wild;F. Schaich;A. F. D. Santos
通用滤波多载波（UFMC）是一种新的调制技术，可以看作是基于滤波OFDM和滤波器组的多载波（FBMCFMT）的推广。作为5G无线系统的候选波形技术，它结合了OFDM的简单性和FBMC的优点。虽然以前的UFMC工作是基于Dolph-Chebyshev滤波器，在本文中，我们现在优化FIR滤波器的设计，使用两种不同的优化标准。第一个标准是信号对带外泄漏比的最大化。第二个标准使用信号对带内失真加上带外泄漏比。我们比较UFMC的基础上的过滤器与这两种优化方法对UFMC与Dolph-Chebyshev滤波器和对OFDM的设置与非完美的频率对准。在链路级仿真中证明了优化滤波器的性能增益。这两种方法都显示出显着的性能增益OFDM的平均SIR：几乎10 dB和7 dB的SIR改善，可以通过使用第一和第二个标准，分别实现。
Universal Filtered Multi-Carrier (UFMC) is a novel modulation technique which can be seen as a generalization of filtered OFDM and filter bank based multi-carrier (FBMCFMT). Being a candidate waveform technology for 5G wireless systems it combines the simplicity of OFDM with the advantages of FBMC. While previous work on UFMC was based on Dolph-Chebyshev-filters, in this paper we now optimize the FIR filter design, using two different optimization criteria. The first criterion is the maximization of the signal over out-of-band leakage ratio. The second criterion uses signal over in-band distortion plus out-of-band leakage ratio. We compare UFMC based on filters with those two optimization approaches against UFMC with Dolph-Chebyshev filters and against OFDM in a setting with non-perfect frequency alignment. The performance gains of the optimized filters are demonstrated in link level simulations. Both of the proposed approaches show significant performance gains over OFDM in terms of average SIR: Almost 10 dB and 7 dB SIR improvement can be achieved by using the first and second criterion, respectively.