5G动态TDD URLLC系统中正交投影器的交叉链路干扰抑制
Cross-Link Interference Suppression By Orthogonal Projector For 5G Dynamic TDD URLLC Systems
摘要:
动态时分复用(TDD)由于其互易传播特性而被设想为5G新无线电的重要传输技术。然而,潜在的交叉链路干扰(CLI)对动态TDD系统中的超可靠和低延迟通信(URLLC)的可行性施加了根本限制。在这项工作中,我们提出了一个接近最佳的和复杂高效的CLI抑制方案,使用正交空间投影,而信令开销仅限于B比特,在回程链路。与最先进的动态TDD研究相比,所提出的解决方案提供了URLLC中断延迟的显著改善,例如,- 减少199%,同时将每个URLLC数据包的可实现容量提高+156%。
英文摘要:
Dynamic time division duplexing (TDD) is envisioned as a vital transmission technology of the 5G new radio, due to its reciprocal propagation characteristics. However, the potential cross-link interference (CLI) imposes a fundamental limitation against the feasibility of the ultra-reliable and low latency communications (URLLC) in dynamic-TDD systems. In this work, we propose a near-optimal and complexity-efficient CLI suppression scheme using orthogonal spatial projection, while the signaling overhead is limited to B-bit, over the back-haul links. Compared to the state-of-the-art dynamic-TDD studies, proposed solution offers a significant improvement of the URLLC outage latency, e.g., -199% reduction, while boosting the achievable capacity per the URLLC packet by +156%.
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