论文标题
细胞无线电演化的柔性快速卷积处理
Flexible fast-convolution processing for cellular radio evolution
论文作者
论文摘要
正交频划分多路复用（OFDM）已被选为长期进化（LTE）和第五代新无线电（5G NR）的基线波形。基于快速卷积（FC）的频域信号处理已被视为一种有效的基于OFDM的波形频谱的工具。基于FC的过滤通过有效的快速傅立叶变换（FFT）的圆形卷积近似线性卷积，使用部分重叠的处理块。在较早的工作中，我们证明了基于FC的过滤是一种非常灵活，有效的工具，用于OFDM信号生成和接收器侧子带过滤。在本文中，我们提出了一种符号同步FC处理方案，可以灵活地允许滤波器重新配置时间分辨率等于一个OFDM符号，同时在混合核学场景中使用可调节的子级别间距，中心频率，中心频率以及子带Widths和Subband bandths us-excience and ford Co-exciencecorce co-excitesce co-excitesce co-excitesce ltecence co-excitce co-exciTence co-exciTence co-exciTence co-exciTence co-exciTence co-exciTence，提出的计划被证明是为了支持预期的5G NR的用例，并为第六代开发提供了灵活的起点。
Orthogonal frequency-division multiplexing (OFDM) has been selected as a baseline waveform for long-term evolution (LTE) and fifth-generation new radio (5G NR). Fast-convolution (FC)-based frequency-domain signal processing has been considered recently as an effective tool for spectrum enhancement of OFDM-based waveforms. FC-based filtering approximates linear convolution by effective fast Fourier transform (FFT)-based circular convolutions using partly overlapping processing blocks. In earlier work, we have shown that FC-based filtering is a very flexible and efficient tool for filtered-OFDM signal generation and receiver side subband filtering. In this paper, we present a symbol-synchronous FC-processing scheme flexibly allowing filter re-configuration time resolution equal to one OFDM symbol while supporting tight carrier-wise filtering for 5G NR in mixed-numerology scenarios with adjustable subcarrier spacings, center frequencies, and subband bandwidths as well as providing co-exitence with LTE. The proposed scheme is demonstrated to support envisioned use cases of 5G NR and provide flexible starting point for sixth generation development.
