论文标题
上行链路合作干扰取消针对蜂窝连接的无人机：一种量化方法
Uplink Cooperative Interference Cancellation for Cellular-Connected UAV: A Quantize-and-Forward Approach
论文作者
论文摘要
空中干扰是与传统的陆地用户和新的无人驾驶汽车（UAV）用户相处高光谱效率的主要障碍。由于其与地面的强烈视线（LOS）通道，无人机可能会在其上行链路/下行链路通信中引起/受到大量非相关但共同通道基站（BSS）的严重干扰。在这封信中，我们提出了一种新的合作干扰取消（CIC）方案，以减轻其对共同通道BSS的强烈干预，以减轻其强烈的干预，这仅需要在每个共同通讯BS及其邻近的帮助BSS之间进行本地合作。具体来说，帮助BSS不为无人机的通信渠道中的任何用户提供服务，并将其从无人机的信号定量并转发到其辅助的共同通道BS，然后通过其自身接收的信号共同处理量化的信号，以通过线性/非线性渗透性式cancellation cancellatiques（ICT）取消UAV的信号来解释其所服务的地面用户的信息。我们通过不同的ICT来得出提议的CIC方案的可实现速率，这是无人机的发射功率和速率的函数，从而揭示了所提出的CIC方案在帮助BSS的解码（DF）操作的现有CIC方案中优于现有CIC方案的条件。
Aerial-ground interference is the main obstacle to achieving high spectral efficiency in cellular networks with both traditional terrestrial users and new unmanned aerial vehicle (UAV) users. Due to their strong line-of-sight (LoS) channels with the ground, UAVs could cause/suffer severe interference to/from a large number of non-associated but co-channel base stations (BSs) in their uplink/downlink communications. In this letter, we propose a new cooperative interference cancellation (CIC) scheme for the UAV's uplink communication to mitigate its strong interference to co-channel BSs, which requires only local cooperation between each co-channel BS and its adjacent helping BSs. Specifically, the helping BSs without serving any users in the UAV's communication channel quantize and forward their received signals from the UAV to their aided co-channel BS, which then processes the quantized signals jointly with its own received signal to decode its served terrestrial user's message via canceling the UAV's signal by linear/nonlinear interference cancellation techniques (ICTs). We derive the achievable rates of the proposed CIC scheme with different ICTs as a function of the UAV's transmit power and rate, and thereby unveil the conditions under which the proposed CIC scheme outperforms the existing CIC scheme based on the decode-and-forward (DF) operation of the helping BSs.
