Faster-than-Nyquist (FTN) signalling is regarded as a promising technology in satellite communications for the past few years, however, existing inter-symbol interference (ISI) elimination algorithms for FTN signalling cannot eliminate the linear distortion caused by the input-multiplexing and output-multiplexing filters, which are very common in satellite communications. On the strength of the fractionally-spaced equaliser (FSE), the authors propose a precoding-based frequency-domain linear distortion equaliser (PFLDE) to eliminate the above-mentioned linear distortion in FTN systems. On the one hand, by virtue of fast Fourier transform (FFT) and inverse FFT, the proposed PFLDE lends itself naturally to high-throughput parallel architectures, which are quite essential in high throughput satellite communications. On the other hand, the mean square error performance of the proposed PFLDE is superior to that of the existing time-domain FSEs. Furthermore, combining PFLDE with the existing ISI elimination algorithms for FTN signalling, the satisfactory bit error ratio performance can be obtained.

中文翻译：

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比奈奎斯特系统快的高效频域线性失真均衡器

快于奈奎斯特（FTN）信令在过去几年中被认为是卫星通信中的一项有前途的技术，但是，现有的用于FTN信令的符号间干扰（ISI）消除算法无法消除输入多路复用引起的线性失真和输出多路复用滤波器，这在卫星通信中非常常见。考虑到分数间隔均衡器（FSE）的强度，作者提出了一种基于预编码的频域线性失真均衡器（PFLDE），以消除FTN系统中的上述线性失真。一方面，借助快速傅立叶变换（FFT）和逆FFT，提出的PFLDE自然地适合于高吞吐量并行体系结构，这在高吞吐量卫星通信中非常重要。另一方面，提出的PFLDE的均方误差性能优于现有的时域FSE。此外，将PFLDE与现有的用于FTN信令的ISI消除算法相结合，可以获得令人满意的误码率性能。