Method to Design UF-OFDM Filter and its Analysis
Method to Design UF-OFDM Filter and its Analysis
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发表时间：
2017-11
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通讯作者：
H. Tsuda;K. Umeno
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作者：
H. Tsuda;K. Umeno
正交频分复用(Ofdm)系统作为一种通信系统得到了广泛的应用。在正交频分复用系统中，主要存在两个问题。其中之一就是OFDM信号具有较高的峰均功率比(PAPR)。另一个问题是，ofdm信号有很大的旁瓣。特别是，为了减少旁瓣，已经提出了通用滤波OFDM(UF-ofdm)系统。在本文中，我们给出了设计UF-OFDM系统滤波器的准则，以及作为优化问题的解的一种获得滤波器的方法。此外，我们还对UF-ofdm系统的PAPR进行了评估。与Dolph-Chebyshev滤波器相比，我们的滤波器具有更小的旁瓣和更低的误码率。然而，使用我们的滤波器和Dolph-Chebyshev滤波器的信号的PAPR比使用传统的OFDM信号的信号的PAPR更高。
Orthogonal Frequency Division Multiplexing (OFDM) systems have been widely used as a communication system. In OFDM systems, there are two main problems. One of them is that OFDM signals have high Peak-to-Average Power Ratio (PAPR). The other problem is that OFDM signals have large side-lobes. In particular, to reduce side-lobes, Universal-Filtered OFDM (UF-OFDM) systems have been proposed. In this paper, we show criteria for designing filters for UF-OFDM systems and a method to obtain the filter as a solution of an optimization problem. Further, we evaluate PAPR with UF-OFDM systems. Our filters have smaller side-lobes and lower Bit Error Rate than the Dolph-Chebyshev filter. However, the PAPR for signals with our filters and the Dolph-Chebyshev filter are higher PAPR than those with conventional OFDM signals.