基于频域迭代判决反馈均衡的低复杂度FTN接收机

发布时间：2018-04-25 20:08

本文选题：FTN信号传输 + 码间串扰　；参考：《通信学报》2017年04期

【摘要】：超Nyquist(FTN,faster-than-Nyquist)信号传输能在不降低系统可靠性的情况下,提高系统的有效性,但其引入了严重的码间串扰,导致最佳接收的复杂度非常高。迭代块判决反馈均衡器(IBDFE,iterative block decision feedback equalizer)能以较低的复杂度达到与最佳接收相近的性能,有效降低了FTN接收机的复杂度,但其复杂度仍能进一步降低。因此,在IBDFE的基础上,简化了前馈和反馈滤波器的设计,为FTN通信系统提出了一种降低复杂度的IBDFE(RC-IBDFE,reduced-complexity IBDFE)。当加速因子为τ={0.8,0.7}时,数值结果和分析表明,与IBDFE相比,RC-IBDFE的顽健性更好,复杂度降低了{45.7%,25%},当误比特率为10-5时的性能增益为{0.605 4,0.193 6}dB;与已有的低复杂度IBDFE(LC-IBDFE,low-complexity IBDFE)相比,RC-IBDFE的顽健性更好,复杂度降低了{13.6%,-25.8%},当误比特率为10-5时的性能增益为{0.289 7,0.531 2}dB。
[Abstract]:The over-Nyquist-FTNFaster-Nyquist) signal transmission can improve the system efficiency without reducing the system reliability, but it introduces serious inter-symbol crosstalk, which leads to the high complexity of optimal reception. The iterative block decision feedback equalizer (IBDF Eiterative block decision feedback equalizer) can achieve the same performance as the optimal receiver with low complexity, which effectively reduces the complexity of the FTN receiver, but its complexity can be further reduced. Therefore, based on IBDFE, the design of feedforward and feedback filters is simplified, and a reduced complexity IBDFEN RC-IBDFEN reduced-complexity IBDFEN is proposed for FTN communication systems. When the acceleration factor is 蟿 = {0.80.70}, the numerical results and analysis show that RC-IBDFE has better robustness than IBDFE, and the complexity of RC-IBDFE is reduced by 25%, and when the bit error rate is 10-5, the performance gain of RC-IBDFE is {0.605 ~ 0.193 6} dB, and the robustness of RC-IBDFE is better than that of the existing low-complexity IBDF-IBDFE. The complexity is reduced by {13.6 / -25.8%}, and the performance gain is {0.289 / 0. 531 2} dB when the bit error rate is 10 ~ (-5).
【作者单位】：中国科学院信息工程研究所;中国科学院大学;
【基金】：国家自然科学基金资助项目(No.61501459)~~
【分类号】：TN851

【共引文献】