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Bypassing Channel Estimation for OTFS Transmission: An Integrated Sensing and Communication Solution

机译：绕过OTFS传输的信道估计：集成传感和通信解决方案

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摘要

In this paper, we develop a novel downlink transmission scheme for vehicular networks based on integrated sensing and communication (ISAC) signals and orthogonal time frequency space (OTFS) modulation. Based on the ISAC-OTFS signals, the roadside units (RSUs) are capable of estimating various motion-related parameters, such as the locations and speeds of vehicles based on the reflected echoes, which are further exploited for predicting the delay-Doppler domain downlink channel parameters. Consequently, the RSU can create effective transmit beamformers which can compensate the channel path loss and Doppler shift before transmitting the ISAC signal while the vehicles can bypass the channel estimation for downlink transmission. Through numerical results, we verify the effectiveness of the proposed scheme.
机译：在本文中，我们基于集成感测和通信（ISAC）信号和正交时频率空间（OTF）调制，为车辆网络开发一种新的下行链路传输方案。 基于ISAC-OTFS信号，路边单元（RSU）能够估计各种运动相关参数，例如基于反射回波的车辆的位置和速度，这进一步利用用于预测延迟多普勒域下行链路 信道参数。 因此，RSU可以创建有效的发射波束形成器，其可以在传输ISAC信号之前补偿信道路径损耗和多普勒频移，而车辆可以绕过用于下行链路传输的信道估计。 通过数值结果，我们验证了拟议方案的有效性。

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