Faster-than-Nyquist (FTN) signaling with linear precoding is investigated as a potential technique to transcend digital video broadcasting-satellite-second generation extension (DVB-S2X). Combining cyclic prefix (CP), cyclic suffix (CS) and discrete Fourier transform (DFT) with existing linear precoding algorithms, such as G-to-minus-half (GTMH) precoding (GTMHP), the CPS-GTMH-DFTP algorithm is proposed to eliminate inter-symbol interference (ISI) for FTN signaling. By comparison with most existing algorithms, our proposed CPS-GTMH-DFTP algorithm requires much lower implementation complexity. Specifically, only two multipliers and the corresponding fast Fourier transform (FFT)/inverse fast Fourier transform (IFFT) operations are required with the proposed CPS-GTMH-DFTP algorithm, which makes our proposed algorithm more suitable for practical implementation. Furthermore, the CPS-GTMH-DFTP algorithm has better bit error rate (BER) performance than most existing precoding algorithms. Simulation results show that even when the time acceleration parameter and roll-off factor equal to 0.75 and 0.35 respectively, our proposed CPS-GTMH-DFTP algorithm can still approach the BER performance of the ISI-free Nyquist signaling for all the modulation types adopted in DVB-S2X. More precisely, with 256-amplitude phase shift keying (APSK), the BER performance degradation is almost 0.03 and 0.01 dB in uncoded and coded FTN systems respectively. As far as we know, with regard to low complexity ISI elimination algorithms for FTN signaling, this is the first time to achieve such excellent performance with a time acceleration parameter 0.75 and a practical roll-off factor 0.35.

中文翻译：

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超越 DVB-S2X：具有线性预编码的比奈奎斯特更快的信令

具有线性预编码的快于奈奎斯特 (FTN) 信令被研究作为超越数字视频广播卫星第二代扩展 (DVB-S2X) 的潜在技术。将循环前缀（CP）、循环后缀（CS）和离散傅立叶变换（DFT）与现有的线性预编码算法，如 G 到减半（GTMH）预编码（GTMHP）相结合，CPS-GTMH-DFTP 算法是建议消除 FTN 信令的符号间干扰 (ISI)。与大多数现有算法相比，我们提出的 CPS-GTMH-DFTP 算法需要低得多的实现复杂度。具体来说，所提出的 CPS-GTMH-DFTP 算法只需要两个乘法器和相应的快速傅立叶变换 (FFT)/逆快速傅立叶变换 (IFFT) 操作，这使得我们提出的算法更适合实际实现。此外，CPS-GTMH-DFTP 算法比大多数现有的预编码算法具有更好的误码率 (BER) 性能。仿真结果表明，即使时间加速参数和滚降因子分别等于 0.75 和 0.35，我们提出的 CPS-GTMH-DFTP 算法仍然可以接近所有采用的调制类型的 ISI-free Nyquist 信令的 BER 性能。 DVB-S2X。更准确地说，使用 256 幅度相移键控 (APSK)，在未编码和编码 FTN 系统中，BER 性能下降几乎分别为 0.03 和 0.01 dB。据我们所知，对于FTN信令的低复杂度ISI消除算法，这是第一次在时间加速参数为0的情况下实现如此出色的性能。