发表机构
Federal University of Technology - Paraná; Constructor University; Conservatoire National des Arts et Métiers - Paris（巴拉那联邦技术大学; Constructor 大学; 巴黎国立工艺博物馆）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文比较了2D-FFT FB与AFBM两种滤波器组波形在高移动性ISAC系统中的性能，分析了OOBE、PAPR、BER及模糊函数，为6G车载通信等场景提供波形选择参考。
AI 中文摘要
我们针对高移动性环境下集成感知与通信（ISAC）系统中的两种有前景的滤波器组多载波波形进行了比较分析。具体而言，我们考虑了二维FFT预编码滤波器组（2D-FFT FB）调制和最近提出的仿射滤波器组调制（AFBM）波形，这两种波形利用时频域、延迟-多普勒域和仿射域中的不同信号表示来提高对多普勒效应的鲁棒性，各自具有不同的特点。一方面，2D-FFT FB在高多普勒条件下改善了频谱局部化，而AFBM将基于啁啾的调制与滤波器组处理相结合，以实现低峰均功率比（PAPR）和降低带外发射（OOBE）。这些方案在OOBE、PAPR和误码率（BER）以及确定性符号和随机感知符号下的模糊函数（AF）的延迟和多普勒切片方面进行了比较。结果还包括正交时频空间（OTFS）和仿射频分复用（AFDM）作为额外的比较基准。结果表明两种基于滤波器组（FB）的方案之间的性能权衡，为高移动性ISAC场景（如车载通信和未来第六代（6G）网络）中的波形候选提供了见解。
英文摘要
We present a comparative analysis of two promising filter bank multicarrier waveforms for integrated sensing and communications (ISAC) systems operating in high-mobility environments. In particular, we consider two-dimensional FFT-precoded filter bank (2D-FFT FB) modulation and the recently-proposed affine filter bank modulation (AFBM) waveforms, which exploit different signal representations across the time-frequency, delay-Doppler and affine domains to improve robustness against Doppler effects, each resulting in distinct features. On the one hand, 2D-FFT FB improves spectral localization under high Doppler conditions, while AFBM combines chirp-based modulation with filter bank processing to achieve low peak-to-average power ratio (PAPR) and reduced out-of-band emission (OOBE). These schemes are compared in terms of OOBE, PAPR and bit-error-rate (BER), as well as the delay and Doppler cuts of the ambiguity function (AF) under deterministic and random sensing symbols. Results for orthogonal time frequency space (OTFS) and affine frequency division multiplexing (AFDM) are also included to provide additional basis of comparison. The results show the performance trade-offs between the two filter bank (FB)-based schemes, providing insights into waveform candidates for high-mobility ISAC scenarios such as vehicular communications and future sixth generation (6G) networks.
Comments6 pages, 7 figures, 2027 IEEE 105th Vehicular Technology Conference (VTC2027-Spring)
